This semi-annual shareholder report contains important information about Morgan Stanley Institutional Fund, Inc. - Advantage Portfolio for the period of January 1, 2026 to June 30, 2026.

Additional Information [Text Block]

You can find additional information about the Fund at www.morganstanley.com/im/shareholderreports. You can also request this information by contacting us at 1-800-869-6397.

Additional Information Phone Number

1-800-869-6397

Additional Information Website

<span style="box-sizing: border-box; color: rgb(0, 0, 0); display: inline; flex-wrap: nowrap; font-size: 10.6667px; font-weight: 400; grid-area: auto; line-height: 16px; margin: 0px; overflow: visible; text-align: left; text-align-last: auto; white-space-collapse: preserve-breaks;">www.morganstanley.com/im/shareholderreports</span>

Expenses [Text Block]

What were the Fund costs for the last six months?

(based on a hypothetical $10,000 investment)

Table Summary
Class Name	Costs of a $10,000 investment	Costs paid as a percentage of a $10,000 investment
Class A	$58	1.19%^{Footnote Reference1}

Footnote	Description
Footnote¹	Annualized

Expenses Paid, Amount

$ 58

Expense Ratio, Percent

1.19%

^[1]

AssetsNet

$ 276,574,787

Holdings Count | Holding

InvestmentCompanyPortfolioTurnover

40.00%

Additional Fund Statistics [Text Block]

Key Fund Statistics

Table Summary
Total Net Assets	$276,574,787
# of Portfolio Holdings	30
Portfolio Turnover Rate	40%

Holdings [Text Block]

Sector Allocation (% of total investments)

Table Summary
Value	Value
Consumer Staples	0.5%
Short-Term Investments	7.2%
Financials	10.0%
Communication Services	10.2%
Industrials	12.3%
Consumer Discretionary	13.3%
Health Care	16.2%
Information Technology	30.3%

Largest Holdings [Text Block]

Top Ten Holdings (% of total investments)^{Footnote Referencea}

Table Summary
Cloudflare, Inc.	11.8%
Royalty Pharma PLC	6.5%
Tesla, Inc.	6.0%
AppLovin Corp.	5.2%
Space Exploration Technologies Corp.	4.8%
Roivant Sciences Ltd.	4.8%
DoorDash, Inc.	4.7%
Affirm Holdings, Inc.	4.5%
Shopify, Inc.	4.5%
Medline, Inc.	4.3%
Total	57.1%

Footnote	Description
Footnote^a	Excluding cash equivalents.

Updated Prospectus Web Address

C000155898

Shareholder Report [Line Items]

Fund Name

Morgan Stanley Institutional Fund, Inc. - Advantage Portfolio

Class Name

Class C

Trading Symbol

MSPRX

Annual or Semi-Annual Statement [Text Block]

This semi-annual shareholder report contains important information about Morgan Stanley Institutional Fund, Inc. - Advantage Portfolio for the period of January 1, 2026 to June 30, 2026.

Additional Information [Text Block]

You can find additional information about the Fund at www.morganstanley.com/im/shareholderreports. You can also request this information by contacting us at 1-800-869-6397.

Additional Information Phone Number

1-800-869-6397

Additional Information Website

Expenses [Text Block]

What were the Fund costs for the last six months?

(based on a hypothetical $10,000 investment)

Table Summary
Class Name	Costs of a $10,000 investment	Costs paid as a percentage of a $10,000 investment
Class C	$94	1.93%^{Footnote Reference1}

Footnote	Description
Footnote¹	Annualized

Expenses Paid, Amount

$ 94

Expense Ratio, Percent

1.93%

^[2]

AssetsNet

$ 276,574,787

Holdings Count | Holding

InvestmentCompanyPortfolioTurnover

40.00%

Additional Fund Statistics [Text Block]

Key Fund Statistics

Table Summary
Total Net Assets	$276,574,787
# of Portfolio Holdings	30
Portfolio Turnover Rate	40%

Holdings [Text Block]

Sector Allocation (% of total investments)

Table Summary
Value	Value
Consumer Staples	0.5%
Short-Term Investments	7.2%
Financials	10.0%
Communication Services	10.2%
Industrials	12.3%
Consumer Discretionary	13.3%
Health Care	16.2%
Information Technology	30.3%

Largest Holdings [Text Block]

Top Ten Holdings (% of total investments)^{Footnote Referencea}

Table Summary
Cloudflare, Inc.	11.8%
Royalty Pharma PLC	6.5%
Tesla, Inc.	6.0%
AppLovin Corp.	5.2%
Space Exploration Technologies Corp.	4.8%
Roivant Sciences Ltd.	4.8%
DoorDash, Inc.	4.7%
Affirm Holdings, Inc.	4.5%
Shopify, Inc.	4.5%
Medline, Inc.	4.3%
Total	57.1%

Footnote	Description
Footnote^a	Excluding cash equivalents.

Updated Prospectus Web Address

C000085091

Shareholder Report [Line Items]

Fund Name

Morgan Stanley Institutional Fund, Inc. - Advantage Portfolio

Class Name

Class I

Trading Symbol

MPAIX

Annual or Semi-Annual Statement [Text Block]

This semi-annual shareholder report contains important information about Morgan Stanley Institutional Fund, Inc. - Advantage Portfolio for the period of January 1, 2026 to June 30, 2026.

Additional Information [Text Block]

You can find additional information about the Fund at www.morganstanley.com/im/shareholderreports. You can also request this information by contacting us at 1-800-869-6397.

Additional Information Phone Number

1-800-869-6397

Additional Information Website

Expenses [Text Block]

What were the Fund costs for the last six months?

(based on a hypothetical $10,000 investment)

Table Summary
Class Name	Costs of a $10,000 investment	Costs paid as a percentage of a $10,000 investment
Class I	$41	0.84%^{Footnote Reference1}

Footnote	Description
Footnote¹	Annualized

Expenses Paid, Amount

$ 41

Expense Ratio, Percent

0.84%

^[3]

AssetsNet

$ 276,574,787

Holdings Count | Holding

InvestmentCompanyPortfolioTurnover

40.00%

Additional Fund Statistics [Text Block]

Key Fund Statistics

Table Summary
Total Net Assets	$276,574,787
# of Portfolio Holdings	30
Portfolio Turnover Rate	40%

Holdings [Text Block]

Sector Allocation (% of total investments)

Table Summary
Value	Value
Consumer Staples	0.5%
Short-Term Investments	7.2%
Financials	10.0%
Communication Services	10.2%
Industrials	12.3%
Consumer Discretionary	13.3%
Health Care	16.2%
Information Technology	30.3%

Largest Holdings [Text Block]

Top Ten Holdings (% of total investments)^{Footnote Referencea}

Table Summary
Cloudflare, Inc.	11.8%
Royalty Pharma PLC	6.5%
Tesla, Inc.	6.0%
AppLovin Corp.	5.2%
Space Exploration Technologies Corp.	4.8%
Roivant Sciences Ltd.	4.8%
DoorDash, Inc.	4.7%
Affirm Holdings, Inc.	4.5%
Shopify, Inc.	4.5%
Medline, Inc.	4.3%
Total	57.1%

Footnote	Description
Footnote^a	Excluding cash equivalents.

Updated Prospectus Web Address

C000085092

Shareholder Report [Line Items]

Fund Name

Morgan Stanley Institutional Fund, Inc. - Advantage Portfolio

Class Name

Class L

Trading Symbol

MAPLX

Annual or Semi-Annual Statement [Text Block]

This semi-annual shareholder report contains important information about Morgan Stanley Institutional Fund, Inc. - Advantage Portfolio for the period of January 1, 2026 to June 30, 2026.

Additional Information [Text Block]

You can find additional information about the Fund at www.morganstanley.com/im/shareholderreports. You can also request this information by contacting us at 1-800-869-6397.

Additional Information Phone Number

1-800-869-6397

Additional Information Website

Expenses [Text Block]

What were the Fund costs for the last six months?

(based on a hypothetical $10,000 investment)

Table Summary
Class Name	Costs of a $10,000 investment	Costs paid as a percentage of a $10,000 investment
Class L	$48	0.98%^{Footnote Reference1}

Footnote	Description
Footnote¹	Annualized

Expenses Paid, Amount

$ 48

Expense Ratio, Percent

0.98%

^[4]

AssetsNet

$ 276,574,787

Holdings Count | Holding

InvestmentCompanyPortfolioTurnover

40.00%

Additional Fund Statistics [Text Block]

Key Fund Statistics

Table Summary
Total Net Assets	$276,574,787
# of Portfolio Holdings	30
Portfolio Turnover Rate	40%

Holdings [Text Block]

Sector Allocation (% of total investments)

Table Summary
Value	Value
Consumer Staples	0.5%
Short-Term Investments	7.2%
Financials	10.0%
Communication Services	10.2%
Industrials	12.3%
Consumer Discretionary	13.3%
Health Care	16.2%
Information Technology	30.3%

Largest Holdings [Text Block]

Top Ten Holdings (% of total investments)^{Footnote Referencea}

Table Summary
Cloudflare, Inc.	11.8%
Royalty Pharma PLC	6.5%
Tesla, Inc.	6.0%
AppLovin Corp.	5.2%
Space Exploration Technologies Corp.	4.8%
Roivant Sciences Ltd.	4.8%
DoorDash, Inc.	4.7%
Affirm Holdings, Inc.	4.5%
Shopify, Inc.	4.5%
Medline, Inc.	4.3%
Total	57.1%

Footnote	Description
Footnote^a	Excluding cash equivalents.

Updated Prospectus Web Address

C000126919

Shareholder Report [Line Items]

Fund Name

Morgan Stanley Institutional Fund, Inc. - Advantage Portfolio

Class Name

Class R6

Trading Symbol

MADSX

Annual or Semi-Annual Statement [Text Block]

This semi-annual shareholder report contains important information about Morgan Stanley Institutional Fund, Inc. - Advantage Portfolio for the period of January 1, 2026 to June 30, 2026.

Additional Information [Text Block]

You can find additional information about the Fund at www.morganstanley.com/im/shareholderreports. You can also request this information by contacting us at 1-800-869-6397.

Additional Information Phone Number

1-800-869-6397

Additional Information Website

Expenses [Text Block]

What were the Fund costs for the last six months?

(based on a hypothetical $10,000 investment)

Table Summary
Class Name	Costs of a $10,000 investment	Costs paid as a percentage of a $10,000 investment
Class R6	$39	0.80%^{Footnote Reference1}

Footnote	Description
Footnote¹	Annualized

Expenses Paid, Amount

$ 39

Expense Ratio, Percent

0.80%

^[5]

AssetsNet

$ 276,574,787

Holdings Count | Holding

InvestmentCompanyPortfolioTurnover

40.00%

Additional Fund Statistics [Text Block]

Key Fund Statistics

Table Summary
Total Net Assets	$276,574,787
# of Portfolio Holdings	30
Portfolio Turnover Rate	40%

Holdings [Text Block]

Sector Allocation (% of total investments)

Table Summary
Value	Value
Consumer Staples	0.5%
Short-Term Investments	7.2%
Financials	10.0%
Communication Services	10.2%
Industrials	12.3%
Consumer Discretionary	13.3%
Health Care	16.2%
Information Technology	30.3%

Largest Holdings [Text Block]

Top Ten Holdings (% of total investments)^{Footnote Referencea}

Table Summary
Cloudflare, Inc.	11.8%
Royalty Pharma PLC	6.5%
Tesla, Inc.	6.0%
AppLovin Corp.	5.2%
Space Exploration Technologies Corp.	4.8%
Roivant Sciences Ltd.	4.8%
DoorDash, Inc.	4.7%
Affirm Holdings, Inc.	4.5%
Shopify, Inc.	4.5%
Medline, Inc.	4.3%
Total	57.1%

Footnote	Description
Footnote^a	Excluding cash equivalents.

Updated Prospectus Web Address

C000163121

Shareholder Report [Line Items]

Fund Name

Morgan Stanley Institutional Fund, Inc. - Asia Opportunity Portfolio

Class Name

Class A

Trading Symbol

MSAUX

Annual or Semi-Annual Statement [Text Block]

This semi-annual shareholder report contains important information about Morgan Stanley Institutional Fund, Inc. - Asia Opportunity Portfolio for the period of January 1, 2026 to June 30, 2026.

Additional Information [Text Block]

You can find additional information about the Fund at www.morganstanley.com/im/shareholderreports. You can also request this information by contacting us at 1-800-869-6397.

Additional Information Phone Number

1-800-869-6397

Additional Information Website

Expenses [Text Block]

What were the Fund costs for the last six months?

(based on a hypothetical $10,000 investment)

Table Summary
Class Name	Costs of a $10,000 investment	Costs paid as a percentage of a $10,000 investment
Class A	$77	1.44%^{Footnote Reference1}

Footnote	Description
Footnote¹	Annualized

Expenses Paid, Amount

$ 77

Expense Ratio, Percent

1.44%

^[6]

AssetsNet

$ 104,415,359

Holdings Count | Holding

InvestmentCompanyPortfolioTurnover

24.00%

Additional Fund Statistics [Text Block]

Key Fund Statistics

Table Summary
Total Net Assets	$104,415,359
# of Portfolio Holdings	38
Portfolio Turnover Rate	24%

Holdings [Text Block]

Country Allocation (% of total investments)

Table Summary
Value	Value
Hong Kong	0.9%
Singapore	1.9%
United States	6.1%
Taiwan	16.4%
India	21.2%
Korea, Republic of	26.3%
China	27.2%

Largest Holdings [Text Block]

Top Ten Holdings (% of total investments)^{Footnote Referencea}

Table Summary
SK Hynix, Inc.	10.7%
Taiwan Semiconductor Manufacturing Co. Ltd.	9.6%
Samsung Electronics Co. Ltd.	8.8%
MediaTek, Inc.	6.8%
MakeMyTrip Ltd.	4.2%
ICICI Bank Ltd.	4.1%
Baidu, Inc.	4.1%
Trip.com Group Ltd.	3.5%
Coupang, Inc.	3.5%
Contemporary Amperex Technology Co. Ltd.	3.4%
Total	58.7%

Footnote	Description
Footnote^a	Excluding cash equivalents.

Updated Prospectus Web Address

C000163122

Shareholder Report [Line Items]

Fund Name

Morgan Stanley Institutional Fund, Inc. - Asia Opportunity Portfolio

Class Name

Class C

Trading Symbol

MSAWX

Annual or Semi-Annual Statement [Text Block]

This semi-annual shareholder report contains important information about Morgan Stanley Institutional Fund, Inc. - Asia Opportunity Portfolio for the period of January 1, 2026 to June 30, 2026.

Additional Information [Text Block]

You can find additional information about the Fund at www.morganstanley.com/im/shareholderreports. You can also request this information by contacting us at 1-800-869-6397.

Additional Information Phone Number

1-800-869-6397

Additional Information Website

Expenses [Text Block]

What were the Fund costs for the last six months?

(based on a hypothetical $10,000 investment)

Table Summary
Class Name	Costs of a $10,000 investment	Costs paid as a percentage of a $10,000 investment
Class C	$118	2.21%^{Footnote Reference1}

Footnote	Description
Footnote¹	Annualized

Expenses Paid, Amount

$ 118

Expense Ratio, Percent

2.21%

^[7]

AssetsNet

$ 104,415,359

Holdings Count | Holding

InvestmentCompanyPortfolioTurnover

24.00%

Additional Fund Statistics [Text Block]

Key Fund Statistics

Table Summary
Total Net Assets	$104,415,359
# of Portfolio Holdings	38
Portfolio Turnover Rate	24%

Holdings [Text Block]

Country Allocation (% of total investments)

Table Summary
Value	Value
Hong Kong	0.9%
Singapore	1.9%
United States	6.1%
Taiwan	16.4%
India	21.2%
Korea, Republic of	26.3%
China	27.2%

Largest Holdings [Text Block]

Top Ten Holdings (% of total investments)^{Footnote Referencea}

Table Summary
SK Hynix, Inc.	10.7%
Taiwan Semiconductor Manufacturing Co. Ltd.	9.6%
Samsung Electronics Co. Ltd.	8.8%
MediaTek, Inc.	6.8%
MakeMyTrip Ltd.	4.2%
ICICI Bank Ltd.	4.1%
Baidu, Inc.	4.1%
Trip.com Group Ltd.	3.5%
Coupang, Inc.	3.5%
Contemporary Amperex Technology Co. Ltd.	3.4%
Total	58.7%

Footnote	Description
Footnote^a	Excluding cash equivalents.

Updated Prospectus Web Address

C000163120

Shareholder Report [Line Items]

Fund Name

Morgan Stanley Institutional Fund, Inc. - Asia Opportunity Portfolio

Class Name

Class I

Trading Symbol

MSAQX

Annual or Semi-Annual Statement [Text Block]

This semi-annual shareholder report contains important information about Morgan Stanley Institutional Fund, Inc. - Asia Opportunity Portfolio for the period of January 1, 2026 to June 30, 2026.

Additional Information [Text Block]

You can find additional information about the Fund at www.morganstanley.com/im/shareholderreports. You can also request this information by contacting us at 1-800-869-6397.

Additional Information Phone Number

1-800-869-6397

Additional Information Website

Expenses [Text Block]

What were the Fund costs for the last six months?

(based on a hypothetical $10,000 investment)

Table Summary
Class Name	Costs of a $10,000 investment	Costs paid as a percentage of a $10,000 investment
Class I	$59	1.11%^{Footnote Reference1}

Footnote	Description
Footnote¹	Annualized

Expenses Paid, Amount

$ 59

Expense Ratio, Percent

1.11%

^[8]

AssetsNet

$ 104,415,359

Holdings Count | Holding

InvestmentCompanyPortfolioTurnover

24.00%

Additional Fund Statistics [Text Block]

Key Fund Statistics

Table Summary
Total Net Assets	$104,415,359
# of Portfolio Holdings	38
Portfolio Turnover Rate	24%

Holdings [Text Block]

Country Allocation (% of total investments)

Table Summary
Value	Value
Hong Kong	0.9%
Singapore	1.9%
United States	6.1%
Taiwan	16.4%
India	21.2%
Korea, Republic of	26.3%
China	27.2%

Largest Holdings [Text Block]

Top Ten Holdings (% of total investments)^{Footnote Referencea}

Table Summary
SK Hynix, Inc.	10.7%
Taiwan Semiconductor Manufacturing Co. Ltd.	9.6%
Samsung Electronics Co. Ltd.	8.8%
MediaTek, Inc.	6.8%
MakeMyTrip Ltd.	4.2%
ICICI Bank Ltd.	4.1%
Baidu, Inc.	4.1%
Trip.com Group Ltd.	3.5%
Coupang, Inc.	3.5%
Contemporary Amperex Technology Co. Ltd.	3.4%
Total	58.7%

Footnote	Description
Footnote^a	Excluding cash equivalents.

Updated Prospectus Web Address

C000163123

Shareholder Report [Line Items]

Fund Name

Morgan Stanley Institutional Fund, Inc. - Asia Opportunity Portfolio

Class Name

Class R6

Trading Symbol

MSAYX

Annual or Semi-Annual Statement [Text Block]

This semi-annual shareholder report contains important information about Morgan Stanley Institutional Fund, Inc. - Asia Opportunity Portfolio for the period of January 1, 2026 to June 30, 2026.

Additional Information [Text Block]

You can find additional information about the Fund at www.morganstanley.com/im/shareholderreports. You can also request this information by contacting us at 1-800-869-6397.

Additional Information Phone Number

1-800-869-6397

Additional Information Website

Expenses [Text Block]

What were the Fund costs for the last six months?

(based on a hypothetical $10,000 investment)

Table Summary
Class Name	Costs of a $10,000 investment	Costs paid as a percentage of a $10,000 investment
Class R6	$56	1.05%^{Footnote Reference1}

Footnote	Description
Footnote¹	Annualized

Expenses Paid, Amount

$ 56

Expense Ratio, Percent

1.05%

^[9]

AssetsNet

$ 104,415,359

Holdings Count | Holding

InvestmentCompanyPortfolioTurnover

24.00%

Additional Fund Statistics [Text Block]

Key Fund Statistics

Table Summary
Total Net Assets	$104,415,359
# of Portfolio Holdings	38
Portfolio Turnover Rate	24%

Holdings [Text Block]

Country Allocation (% of total investments)

Table Summary
Value	Value
Hong Kong	0.9%
Singapore	1.9%
United States	6.1%
Taiwan	16.4%
India	21.2%
Korea, Republic of	26.3%
China	27.2%

Largest Holdings [Text Block]

Top Ten Holdings (% of total investments)^{Footnote Referencea}

Table Summary
SK Hynix, Inc.	10.7%
Taiwan Semiconductor Manufacturing Co. Ltd.	9.6%
Samsung Electronics Co. Ltd.	8.8%
MediaTek, Inc.	6.8%
MakeMyTrip Ltd.	4.2%
ICICI Bank Ltd.	4.1%
Baidu, Inc.	4.1%
Trip.com Group Ltd.	3.5%
Coupang, Inc.	3.5%
Contemporary Amperex Technology Co. Ltd.	3.4%
Total	58.7%

Footnote	Description
Footnote^a	Excluding cash equivalents.

Updated Prospectus Web Address

C000216355

Shareholder Report [Line Items]

Fund Name

Morgan Stanley Institutional Fund, Inc. - Developing Opportunity Portfolio

Class Name

Class A

Trading Symbol

MDOAX

Annual or Semi-Annual Statement [Text Block]

This semi-annual shareholder report contains important information about Morgan Stanley Institutional Fund, Inc. - Developing Opportunity Portfolio for the period of January 1, 2026 to June 30, 2026.

Additional Information [Text Block]

You can find additional information about the Fund at www.morganstanley.com/im/shareholderreports. You can also request this information by contacting us at 1-800-869-6397.

Additional Information Phone Number

1-800-869-6397

Additional Information Website

Expenses [Text Block]

What were the Fund costs for the last six months?

(based on a hypothetical $10,000 investment)

Table Summary
Class Name	Costs of a $10,000 investment	Costs paid as a percentage of a $10,000 investment
Class A	$91	1.71%^{Footnote Reference1}

Footnote	Description
Footnote¹	Annualized

Expenses Paid, Amount

$ 91

Expense Ratio, Percent

1.71%

^[10]

AssetsNet

$ 26,856,152

Holdings Count | Holding

InvestmentCompanyPortfolioTurnover

37.00%

Additional Fund Statistics [Text Block]

Key Fund Statistics

Table Summary
Total Net Assets	$26,856,152
# of Portfolio Holdings	34
Portfolio Turnover Rate	37%

Holdings [Text Block]

Country Allocation (% of total investments)

Table Summary
Value	Value
Poland	1.1%
Singapore	1.5%
Brazil	3.5%
United States	7.3%
Taiwan	15.1%
India	19.3%
China	22.3%
Korea, Republic of	29.9%

Largest Holdings [Text Block]

Top Ten Holdings (% of total investments)^{Footnote Referencea}

Table Summary
SK Hynix, Inc.	13.1%
Samsung Electronics Co. Ltd.	11.4%
Taiwan Semiconductor Manufacturing Co. Ltd.	9.0%
MediaTek, Inc.	6.1%
MercadoLibre, Inc.	4.8%
MakeMyTrip Ltd.	4.1%
ICICI Bank Ltd.	3.6%
NU Holdings Ltd.	3.5%
Baidu, Inc.	3.4%
Eternal Ltd.	3.3%
Total	62.3%

Footnote	Description
Footnote^a	Excluding cash equivalents.

Updated Prospectus Web Address

C000216357

Shareholder Report [Line Items]

Fund Name

Morgan Stanley Institutional Fund, Inc. - Developing Opportunity Portfolio

Class Name

Class C

Trading Symbol

MDOBX

Annual or Semi-Annual Statement [Text Block]

This semi-annual shareholder report contains important information about Morgan Stanley Institutional Fund, Inc. - Developing Opportunity Portfolio for the period of January 1, 2026 to June 30, 2026.

Additional Information [Text Block]

You can find additional information about the Fund at www.morganstanley.com/im/shareholderreports. You can also request this information by contacting us at 1-800-869-6397.

Additional Information Phone Number

1-800-869-6397

Additional Information Website

Expenses [Text Block]

What were the Fund costs for the last six months?

(based on a hypothetical $10,000 investment)

Table Summary
Class Name	Costs of a $10,000 investment	Costs paid as a percentage of a $10,000 investment
Class C	$130	2.43%^{Footnote Reference1}

Footnote	Description
Footnote¹	Annualized

Expenses Paid, Amount

$ 130

Expense Ratio, Percent

2.43%

^[11]

AssetsNet

$ 26,856,152

Holdings Count | Holding

InvestmentCompanyPortfolioTurnover

37.00%

Additional Fund Statistics [Text Block]

Key Fund Statistics

Table Summary
Total Net Assets	$26,856,152
# of Portfolio Holdings	34
Portfolio Turnover Rate	37%

Holdings [Text Block]

Country Allocation (% of total investments)

Table Summary
Value	Value
Poland	1.1%
Singapore	1.5%
Brazil	3.5%
United States	7.3%
Taiwan	15.1%
India	19.3%
China	22.3%
Korea, Republic of	29.9%

Largest Holdings [Text Block]

Top Ten Holdings (% of total investments)^{Footnote Referencea}

Table Summary
SK Hynix, Inc.	13.1%
Samsung Electronics Co. Ltd.	11.4%
Taiwan Semiconductor Manufacturing Co. Ltd.	9.0%
MediaTek, Inc.	6.1%
MercadoLibre, Inc.	4.8%
MakeMyTrip Ltd.	4.1%
ICICI Bank Ltd.	3.6%
NU Holdings Ltd.	3.5%
Baidu, Inc.	3.4%
Eternal Ltd.	3.3%
Total	62.3%

Footnote	Description
Footnote^a	Excluding cash equivalents.

Updated Prospectus Web Address

C000216354

Shareholder Report [Line Items]

Fund Name

Morgan Stanley Institutional Fund, Inc. - Developing Opportunity Portfolio

Class Name

Class I

Trading Symbol

MDOEX

Annual or Semi-Annual Statement [Text Block]

This semi-annual shareholder report contains important information about Morgan Stanley Institutional Fund, Inc. - Developing Opportunity Portfolio for the period of January 1, 2026 to June 30, 2026.

Additional Information [Text Block]

You can find additional information about the Fund at www.morganstanley.com/im/shareholderreports. You can also request this information by contacting us at 1-800-869-6397.

Additional Information Phone Number

1-800-869-6397

Additional Information Website

Expenses [Text Block]

What were the Fund costs for the last six months?

(based on a hypothetical $10,000 investment)

Table Summary
Class Name	Costs of a $10,000 investment	Costs paid as a percentage of a $10,000 investment
Class I	$67	1.26%^{Footnote Reference1}

Footnote	Description
Footnote¹	Annualized

Expenses Paid, Amount

$ 67

Expense Ratio, Percent

1.26%

^[12]

AssetsNet

$ 26,856,152

Holdings Count | Holding

InvestmentCompanyPortfolioTurnover

37.00%

Additional Fund Statistics [Text Block]

Key Fund Statistics

Table Summary
Total Net Assets	$26,856,152
# of Portfolio Holdings	34
Portfolio Turnover Rate	37%

Holdings [Text Block]

Country Allocation (% of total investments)

Table Summary
Value	Value
Poland	1.1%
Singapore	1.5%
Brazil	3.5%
United States	7.3%
Taiwan	15.1%
India	19.3%
China	22.3%
Korea, Republic of	29.9%

Largest Holdings [Text Block]

Top Ten Holdings (% of total investments)^{Footnote Referencea}

Table Summary
SK Hynix, Inc.	13.1%
Samsung Electronics Co. Ltd.	11.4%
Taiwan Semiconductor Manufacturing Co. Ltd.	9.0%
MediaTek, Inc.	6.1%
MercadoLibre, Inc.	4.8%
MakeMyTrip Ltd.	4.1%
ICICI Bank Ltd.	3.6%
NU Holdings Ltd.	3.5%
Baidu, Inc.	3.4%
Eternal Ltd.	3.3%
Total	62.3%

Footnote	Description
Footnote^a	Excluding cash equivalents.

Updated Prospectus Web Address

C000216356

Shareholder Report [Line Items]

Fund Name

Morgan Stanley Institutional Fund, Inc. - Developing Opportunity Portfolio

Class Name

Class R6

Trading Symbol

MDODX

Annual or Semi-Annual Statement [Text Block]

This semi-annual shareholder report contains important information about Morgan Stanley Institutional Fund, Inc. - Developing Opportunity Portfolio for the period of January 1, 2026 to June 30, 2026.

Additional Information [Text Block]

You can find additional information about the Fund at www.morganstanley.com/im/shareholderreports. You can also request this information by contacting us at 1-800-869-6397.

Additional Information Phone Number

1-800-869-6397

Additional Information Website

Expenses [Text Block]

What were the Fund costs for the last six months?

(based on a hypothetical $10,000 investment)

Table Summary
Class Name	Costs of a $10,000 investment	Costs paid as a percentage of a $10,000 investment
Class R6	$71	1.33%^{Footnote Reference1}

Footnote	Description
Footnote¹	Annualized

Expenses Paid, Amount

$ 71

Expense Ratio, Percent

1.33%

^[13]

AssetsNet

$ 26,856,152

Holdings Count | Holding

InvestmentCompanyPortfolioTurnover

37.00%

Additional Fund Statistics [Text Block]

Key Fund Statistics

Table Summary
Total Net Assets	$26,856,152
# of Portfolio Holdings	34
Portfolio Turnover Rate	37%

Holdings [Text Block]

Country Allocation (% of total investments)

Table Summary
Value	Value
Poland	1.1%
Singapore	1.5%
Brazil	3.5%
United States	7.3%
Taiwan	15.1%
India	19.3%
China	22.3%
Korea, Republic of	29.9%

Largest Holdings [Text Block]

Top Ten Holdings (% of total investments)^{Footnote Referencea}

Table Summary
SK Hynix, Inc.	13.1%
Samsung Electronics Co. Ltd.	11.4%
Taiwan Semiconductor Manufacturing Co. Ltd.	9.0%
MediaTek, Inc.	6.1%
MercadoLibre, Inc.	4.8%
MakeMyTrip Ltd.	4.1%
ICICI Bank Ltd.	3.6%
NU Holdings Ltd.	3.5%
Baidu, Inc.	3.4%
Eternal Ltd.	3.3%
Total	62.3%

Footnote	Description
Footnote^a	Excluding cash equivalents.

Updated Prospectus Web Address

C000149048

Shareholder Report [Line Items]

Fund Name

Morgan Stanley Institutional Fund, Inc. - Emerging Markets Leaders Portfolio

Class Name

Class A

Trading Symbol

MELAX

Annual or Semi-Annual Statement [Text Block]

This semi-annual shareholder report contains important information about Morgan Stanley Institutional Fund, Inc. - Emerging Markets Leaders Portfolio for the period of January 1, 2026 to June 30, 2026.

Additional Information [Text Block]

You can find additional information about the Fund at www.morganstanley.com/im/shareholderreports. You can also request this information by contacting us at 1-800-869-6397.

Additional Information Phone Number

1-800-869-6397

Additional Information Website

Expenses [Text Block]

What were the Fund costs for the last six months?

(based on a hypothetical $10,000 investment)

Table Summary
Class Name	Costs of a $10,000 investment	Costs paid as a percentage of a $10,000 investment
Class A	$72	1.36%^{Footnote Reference1}

Footnote	Description
Footnote¹	Annualized

Expenses Paid, Amount

$ 72

Expense Ratio, Percent

1.36%

^[14]

AssetsNet

$ 100,589,271

Holdings Count | Holding

InvestmentCompanyPortfolioTurnover

80.00%

Additional Fund Statistics [Text Block]

Key Fund Statistics

Table Summary
Total Net Assets	$100,589,271
# of Portfolio Holdings	42
Portfolio Turnover Rate	80%

Holdings [Text Block]

Country Allocation (% of total investments)

Table Summary
Value	Value
Other	5.6%
Peru	2.6%
Singapore	2.9%
Mexico	4.0%
Brazil	4.2%
United States	6.3%
South Africa	6.8%
China	13.6%
India	14.1%
Korea, Republic of	17.7%
Taiwan	22.2%

Largest Holdings [Text Block]

Top Ten Holdings (% of total investments)^{Footnote Referencea}

Table Summary
Taiwan Semiconductor Manufacturing Co. Ltd.	14.7%
SK Hynix, Inc.	9.2%
Samsung Electronics Co. Ltd.	4.4%
Delta Electronics, Inc.	3.4%
NAURA Technology Group Co. Ltd.	3.4%
Sea Ltd.	2.9%
Tencent Holdings Ltd.	2.8%
Credicorp Ltd.	2.6%
ICICI Bank Ltd.	2.6%
OUTsurance Group Ltd.	2.4%
Total	48.4%

Footnote	Description
Footnote^a	Excluding cash equivalents.

Updated Prospectus Web Address

C000155912

Shareholder Report [Line Items]

Fund Name

Morgan Stanley Institutional Fund, Inc. - Emerging Markets Leaders Portfolio

Class Name

Class C

Trading Symbol

MEMLX

Annual or Semi-Annual Statement [Text Block]

Additional Information [Text Block]

You can find additional information about the Fund at www.morganstanley.com/im/shareholderreports. You can also request this information by contacting us at 1-800-869-6397.

Additional Information Phone Number

1-800-869-6397

Additional Information Website

Expenses [Text Block]

What were the Fund costs for the last six months?

(based on a hypothetical $10,000 investment)

Table Summary
Class Name	Costs of a $10,000 investment	Costs paid as a percentage of a $10,000 investment
Class C	$112	2.11%^{Footnote Reference1}

Footnote	Description
Footnote¹	Annualized

Expenses Paid, Amount

$ 112

Expense Ratio, Percent

2.11%

^[15]

AssetsNet

$ 100,589,271

Holdings Count | Holding

InvestmentCompanyPortfolioTurnover

80.00%

Additional Fund Statistics [Text Block]

Key Fund Statistics

Table Summary
Total Net Assets	$100,589,271
# of Portfolio Holdings	42
Portfolio Turnover Rate	80%

Holdings [Text Block]

Country Allocation (% of total investments)

Table Summary
Value	Value
Other	5.6%
Peru	2.6%
Singapore	2.9%
Mexico	4.0%
Brazil	4.2%
United States	6.3%
South Africa	6.8%
China	13.6%
India	14.1%
Korea, Republic of	17.7%
Taiwan	22.2%

Largest Holdings [Text Block]

Top Ten Holdings (% of total investments)^{Footnote Referencea}

Table Summary
Taiwan Semiconductor Manufacturing Co. Ltd.	14.7%
SK Hynix, Inc.	9.2%
Samsung Electronics Co. Ltd.	4.4%
Delta Electronics, Inc.	3.4%
NAURA Technology Group Co. Ltd.	3.4%
Sea Ltd.	2.9%
Tencent Holdings Ltd.	2.8%
Credicorp Ltd.	2.6%
ICICI Bank Ltd.	2.6%
OUTsurance Group Ltd.	2.4%
Total	48.4%

Footnote	Description
Footnote^a	Excluding cash equivalents.

Updated Prospectus Web Address

C000149047

Shareholder Report [Line Items]

Fund Name

Morgan Stanley Institutional Fund, Inc. - Emerging Markets Leaders Portfolio

Class Name

Class I

Trading Symbol

MELIX

Annual or Semi-Annual Statement [Text Block]

Additional Information [Text Block]

You can find additional information about the Fund at www.morganstanley.com/im/shareholderreports. You can also request this information by contacting us at 1-800-869-6397.

Additional Information Phone Number

1-800-869-6397

Additional Information Website

Expenses [Text Block]

What were the Fund costs for the last six months?

(based on a hypothetical $10,000 investment)

Table Summary
Class Name	Costs of a $10,000 investment	Costs paid as a percentage of a $10,000 investment
Class I	$53	1.00%^{Footnote Reference1}

Footnote	Description
Footnote¹	Annualized

Expenses Paid, Amount

$ 53

Expense Ratio, Percent

1.00%

^[16]

AssetsNet

$ 100,589,271

Holdings Count | Holding

InvestmentCompanyPortfolioTurnover

80.00%

Additional Fund Statistics [Text Block]

Key Fund Statistics

Table Summary
Total Net Assets	$100,589,271
# of Portfolio Holdings	42
Portfolio Turnover Rate	80%

Holdings [Text Block]

Country Allocation (% of total investments)

Table Summary
Value	Value
Other	5.6%
Peru	2.6%
Singapore	2.9%
Mexico	4.0%
Brazil	4.2%
United States	6.3%
South Africa	6.8%
China	13.6%
India	14.1%
Korea, Republic of	17.7%
Taiwan	22.2%

Largest Holdings [Text Block]

Top Ten Holdings (% of total investments)^{Footnote Referencea}

Table Summary
Taiwan Semiconductor Manufacturing Co. Ltd.	14.7%
SK Hynix, Inc.	9.2%
Samsung Electronics Co. Ltd.	4.4%
Delta Electronics, Inc.	3.4%
NAURA Technology Group Co. Ltd.	3.4%
Sea Ltd.	2.9%
Tencent Holdings Ltd.	2.8%
Credicorp Ltd.	2.6%
ICICI Bank Ltd.	2.6%
OUTsurance Group Ltd.	2.4%
Total	48.4%

Footnote	Description
Footnote^a	Excluding cash equivalents.

Updated Prospectus Web Address

C000226932

Shareholder Report [Line Items]

Fund Name

Morgan Stanley Institutional Fund, Inc. - Emerging Markets Leaders Portfolio

Class Name

Class IR

Trading Symbol

MSIWX

Annual or Semi-Annual Statement [Text Block]

Additional Information [Text Block]

You can find additional information about the Fund at www.morganstanley.com/im/shareholderreports. You can also request this information by contacting us at 1-800-869-6397.

Additional Information Phone Number

1-800-869-6397

Additional Information Website

Expenses [Text Block]

What were the Fund costs for the last six months?

(based on a hypothetical $10,000 investment)

Table Summary
Class Name	Costs of a $10,000 investment	Costs paid as a percentage of a $10,000 investment
Class IR	$51	0.96%^{Footnote Reference1}

Footnote	Description
Footnote¹	Annualized

Expenses Paid, Amount

$ 51

Expense Ratio, Percent

0.96%

^[17]

AssetsNet

$ 100,589,271

Holdings Count | Holding

InvestmentCompanyPortfolioTurnover

80.00%

Additional Fund Statistics [Text Block]

Key Fund Statistics

Table Summary
Total Net Assets	$100,589,271
# of Portfolio Holdings	42
Portfolio Turnover Rate	80%

Holdings [Text Block]

Country Allocation (% of total investments)

Table Summary
Value	Value
Other	5.6%
Peru	2.6%
Singapore	2.9%
Mexico	4.0%
Brazil	4.2%
United States	6.3%
South Africa	6.8%
China	13.6%
India	14.1%
Korea, Republic of	17.7%
Taiwan	22.2%

Largest Holdings [Text Block]

Top Ten Holdings (% of total investments)^{Footnote Referencea}

Table Summary
Taiwan Semiconductor Manufacturing Co. Ltd.	14.7%
SK Hynix, Inc.	9.2%
Samsung Electronics Co. Ltd.	4.4%
Delta Electronics, Inc.	3.4%
NAURA Technology Group Co. Ltd.	3.4%
Sea Ltd.	2.9%
Tencent Holdings Ltd.	2.8%
Credicorp Ltd.	2.6%
ICICI Bank Ltd.	2.6%
OUTsurance Group Ltd.	2.4%
Total	48.4%

Footnote	Description
Footnote^a	Excluding cash equivalents.

Updated Prospectus Web Address

C000149050

Shareholder Report [Line Items]

Fund Name

Morgan Stanley Institutional Fund, Inc. - Emerging Markets Leaders Portfolio

Class Name

Class R6

Trading Symbol

MELSX

Annual or Semi-Annual Statement [Text Block]

Additional Information [Text Block]

You can find additional information about the Fund at www.morganstanley.com/im/shareholderreports. You can also request this information by contacting us at 1-800-869-6397.

Additional Information Phone Number

1-800-869-6397

Additional Information Website

Expenses [Text Block]

What were the Fund costs for the last six months?

(based on a hypothetical $10,000 investment)

Table Summary
Class Name	Costs of a $10,000 investment	Costs paid as a percentage of a $10,000 investment
Class R6	$51	0.96%^{Footnote Reference1}

Footnote	Description
Footnote¹	Annualized

Expenses Paid, Amount

$ 51

Expense Ratio, Percent

0.96%

^[18]

AssetsNet

$ 100,589,271

Holdings Count | Holding

InvestmentCompanyPortfolioTurnover

80.00%

Additional Fund Statistics [Text Block]

Key Fund Statistics

Table Summary
Total Net Assets	$100,589,271
# of Portfolio Holdings	42
Portfolio Turnover Rate	80%

Holdings [Text Block]

Country Allocation (% of total investments)

Table Summary
Value	Value
Other	5.6%
Peru	2.6%
Singapore	2.9%
Mexico	4.0%
Brazil	4.2%
United States	6.3%
South Africa	6.8%
China	13.6%
India	14.1%
Korea, Republic of	17.7%
Taiwan	22.2%

Largest Holdings [Text Block]

Top Ten Holdings (% of total investments)^{Footnote Referencea}

Table Summary
Taiwan Semiconductor Manufacturing Co. Ltd.	14.7%
SK Hynix, Inc.	9.2%
Samsung Electronics Co. Ltd.	4.4%
Delta Electronics, Inc.	3.4%
NAURA Technology Group Co. Ltd.	3.4%
Sea Ltd.	2.9%
Tencent Holdings Ltd.	2.8%
Credicorp Ltd.	2.6%
ICICI Bank Ltd.	2.6%
OUTsurance Group Ltd.	2.4%
Total	48.4%

Footnote	Description
Footnote^a	Excluding cash equivalents.

Updated Prospectus Web Address

C000007747

Shareholder Report [Line Items]

Fund Name

Morgan Stanley Institutional Fund, Inc. - Emerging Markets Portfolio

Class Name

Class A

Trading Symbol

MMKBX

Annual or Semi-Annual Statement [Text Block]

This semi-annual shareholder report contains important information about Morgan Stanley Institutional Fund, Inc. - Emerging Markets Portfolio for the period of January 1, 2026 to June 30, 2026.

Additional Information [Text Block]

You can find additional information about the Fund at www.morganstanley.com/im/shareholderreports. You can also request this information by contacting us at 1-800-869-6397.

Additional Information Phone Number

1-800-869-6397

Additional Information Website

Expenses [Text Block]

What were the Fund costs for the last six months?

(based on a hypothetical $10,000 investment)

Table Summary
Class Name	Costs of a $10,000 investment	Costs paid as a percentage of a $10,000 investment
Class A	$79	1.37%^{Footnote Reference1}

Footnote	Description
Footnote¹	Annualized

Expenses Paid, Amount

$ 79

Expense Ratio, Percent

1.37%

^[19]

AssetsNet

$ 183,708,894

Holdings Count | Holding

InvestmentCompanyPortfolioTurnover

29.00%

Additional Fund Statistics [Text Block]

Key Fund Statistics

Table Summary
Total Net Assets	$183,708,894
# of Portfolio Holdings	84
Portfolio Turnover Rate	29%

Holdings [Text Block]

Country Allocation (% of total investments)

Table Summary
Value	Value
Other	4.1%
Hungary	1.5%
United States	2.0%
Mexico	2.3%
Poland	2.8%
South Africa	4.3%
Brazil	4.3%
India	12.1%
China	13.1%
Korea, Republic of	24.3%
Taiwan	29.2%

Largest Holdings [Text Block]

Top Ten Holdings (% of total investments)^{Footnote Referencea}

Table Summary
Taiwan Semiconductor Manufacturing Co. Ltd.	15.3%
Samsung Electronics Co. Ltd.	12.4%
SK Hynix, Inc.	5.2%
SK Square Co. Ltd.	4.0%
MediaTek, Inc.	3.3%
Tencent Holdings Ltd.	3.1%
Delta Electronics, Inc.	2.9%
Unimicron Technology Corp.	1.9%
Alibaba Group Holding Ltd.	1.8%
Hon Hai Precision Industry Co. Ltd.	1.6%
Total	51.5%

Footnote	Description
Footnote^a	Excluding cash equivalents.

Updated Prospectus Web Address

C000155890

Shareholder Report [Line Items]

Fund Name

Morgan Stanley Institutional Fund, Inc. - Emerging Markets Portfolio

Class Name

Class C

Trading Symbol

MSEPX

Annual or Semi-Annual Statement [Text Block]

This semi-annual shareholder report contains important information about Morgan Stanley Institutional Fund, Inc. - Emerging Markets Portfolio for the period of January 1, 2026 to June 30, 2026.

Additional Information [Text Block]

You can find additional information about the Fund at www.morganstanley.com/im/shareholderreports. You can also request this information by contacting us at 1-800-869-6397.

Additional Information Phone Number

1-800-869-6397

Additional Information Website

Expenses [Text Block]

What were the Fund costs for the last six months?

(based on a hypothetical $10,000 investment)

Table Summary
Class Name	Costs of a $10,000 investment	Costs paid as a percentage of a $10,000 investment
Class C	$122	2.12%^{Footnote Reference1}

Footnote	Description
Footnote¹	Annualized

Expenses Paid, Amount

$ 122

Expense Ratio, Percent

2.12%

^[20]

AssetsNet

$ 183,708,894

Holdings Count | Holding

InvestmentCompanyPortfolioTurnover

29.00%

Additional Fund Statistics [Text Block]

Key Fund Statistics

Table Summary
Total Net Assets	$183,708,894
# of Portfolio Holdings	84
Portfolio Turnover Rate	29%

Holdings [Text Block]

Country Allocation (% of total investments)

Table Summary
Value	Value
Other	4.1%
Hungary	1.5%
United States	2.0%
Mexico	2.3%
Poland	2.8%
South Africa	4.3%
Brazil	4.3%
India	12.1%
China	13.1%
Korea, Republic of	24.3%
Taiwan	29.2%

Largest Holdings [Text Block]

Top Ten Holdings (% of total investments)^{Footnote Referencea}

Table Summary
Taiwan Semiconductor Manufacturing Co. Ltd.	15.3%
Samsung Electronics Co. Ltd.	12.4%
SK Hynix, Inc.	5.2%
SK Square Co. Ltd.	4.0%
MediaTek, Inc.	3.3%
Tencent Holdings Ltd.	3.1%
Delta Electronics, Inc.	2.9%
Unimicron Technology Corp.	1.9%
Alibaba Group Holding Ltd.	1.8%
Hon Hai Precision Industry Co. Ltd.	1.6%
Total	51.5%

Footnote	Description
Footnote^a	Excluding cash equivalents.

Updated Prospectus Web Address

C000007746

Shareholder Report [Line Items]

Fund Name

Morgan Stanley Institutional Fund, Inc. - Emerging Markets Portfolio

Class Name

Class I

Trading Symbol

MGEMX

Annual or Semi-Annual Statement [Text Block]

This semi-annual shareholder report contains important information about Morgan Stanley Institutional Fund, Inc. - Emerging Markets Portfolio for the period of January 1, 2026 to June 30, 2026.

Additional Information [Text Block]

You can find additional information about the Fund at www.morganstanley.com/im/shareholderreports. You can also request this information by contacting us at 1-800-869-6397.

Additional Information Phone Number

1-800-869-6397

Additional Information Website

Expenses [Text Block]

What were the Fund costs for the last six months?

(based on a hypothetical $10,000 investment)

Table Summary
Class Name	Costs of a $10,000 investment	Costs paid as a percentage of a $10,000 investment
Class I	$58	1.01%^{Footnote Reference1}

Footnote	Description
Footnote¹	Annualized

Expenses Paid, Amount

$ 58

Expense Ratio, Percent

1.01%

^[21]

AssetsNet

$ 183,708,894

Holdings Count | Holding

InvestmentCompanyPortfolioTurnover

29.00%

Additional Fund Statistics [Text Block]

Key Fund Statistics

Table Summary
Total Net Assets	$183,708,894
# of Portfolio Holdings	84
Portfolio Turnover Rate	29%

Holdings [Text Block]

Country Allocation (% of total investments)

Table Summary
Value	Value
Other	4.1%
Hungary	1.5%
United States	2.0%
Mexico	2.3%
Poland	2.8%
South Africa	4.3%
Brazil	4.3%
India	12.1%
China	13.1%
Korea, Republic of	24.3%
Taiwan	29.2%

Largest Holdings [Text Block]

Top Ten Holdings (% of total investments)^{Footnote Referencea}

Table Summary
Taiwan Semiconductor Manufacturing Co. Ltd.	15.3%
Samsung Electronics Co. Ltd.	12.4%
SK Hynix, Inc.	5.2%
SK Square Co. Ltd.	4.0%
MediaTek, Inc.	3.3%
Tencent Holdings Ltd.	3.1%
Delta Electronics, Inc.	2.9%
Unimicron Technology Corp.	1.9%
Alibaba Group Holding Ltd.	1.8%
Hon Hai Precision Industry Co. Ltd.	1.6%
Total	51.5%

Footnote	Description
Footnote^a	Excluding cash equivalents.

Updated Prospectus Web Address

C000198815

Shareholder Report [Line Items]

Fund Name

Morgan Stanley Institutional Fund, Inc. - Emerging Markets Portfolio

Class Name

Class IR

Trading Symbol

MRGEX

Annual or Semi-Annual Statement [Text Block]

This semi-annual shareholder report contains important information about Morgan Stanley Institutional Fund, Inc. - Emerging Markets Portfolio for the period of January 1, 2026 to June 30, 2026.

Additional Information [Text Block]

You can find additional information about the Fund at www.morganstanley.com/im/shareholderreports. You can also request this information by contacting us at 1-800-869-6397.

Additional Information Phone Number

1-800-869-6397

Additional Information Website

Expenses [Text Block]

What were the Fund costs for the last six months?

(based on a hypothetical $10,000 investment)

Table Summary
Class Name	Costs of a $10,000 investment	Costs paid as a percentage of a $10,000 investment
Class IR	$56	0.97%^{Footnote Reference1}

Footnote	Description
Footnote¹	Annualized

Expenses Paid, Amount

$ 56

Expense Ratio, Percent

0.97%

^[22]

AssetsNet

$ 183,708,894

Holdings Count | Holding

InvestmentCompanyPortfolioTurnover

29.00%

Additional Fund Statistics [Text Block]

Key Fund Statistics

Table Summary
Total Net Assets	$183,708,894
# of Portfolio Holdings	84
Portfolio Turnover Rate	29%

Holdings [Text Block]

Country Allocation (% of total investments)

Table Summary
Value	Value
Other	4.1%
Hungary	1.5%
United States	2.0%
Mexico	2.3%
Poland	2.8%
South Africa	4.3%
Brazil	4.3%
India	12.1%
China	13.1%
Korea, Republic of	24.3%
Taiwan	29.2%

Largest Holdings [Text Block]

Top Ten Holdings (% of total investments)^{Footnote Referencea}

Table Summary
Taiwan Semiconductor Manufacturing Co. Ltd.	15.3%
Samsung Electronics Co. Ltd.	12.4%
SK Hynix, Inc.	5.2%
SK Square Co. Ltd.	4.0%
MediaTek, Inc.	3.3%
Tencent Holdings Ltd.	3.1%
Delta Electronics, Inc.	2.9%
Unimicron Technology Corp.	1.9%
Alibaba Group Holding Ltd.	1.8%
Hon Hai Precision Industry Co. Ltd.	1.6%
Total	51.5%

Footnote	Description
Footnote^a	Excluding cash equivalents.

Updated Prospectus Web Address

C000113803

Shareholder Report [Line Items]

Fund Name

Morgan Stanley Institutional Fund, Inc. - Emerging Markets Portfolio

Class Name

Class L

Trading Symbol

MSELX

Annual or Semi-Annual Statement [Text Block]

This semi-annual shareholder report contains important information about Morgan Stanley Institutional Fund, Inc. - Emerging Markets Portfolio for the period of January 1, 2026 to June 30, 2026.

Additional Information [Text Block]

You can find additional information about the Fund at www.morganstanley.com/im/shareholderreports. You can also request this information by contacting us at 1-800-869-6397.

Additional Information Phone Number

1-800-869-6397

Additional Information Website

Expenses [Text Block]

What were the Fund costs for the last six months?

(based on a hypothetical $10,000 investment)

Table Summary
Class Name	Costs of a $10,000 investment	Costs paid as a percentage of a $10,000 investment
Class L	$108	1.87%^{Footnote Reference1}

Footnote	Description
Footnote¹	Annualized

Expenses Paid, Amount

$ 108

Expense Ratio, Percent

1.87%

^[23]

AssetsNet

$ 183,708,894

Holdings Count | Holding

InvestmentCompanyPortfolioTurnover

29.00%

Additional Fund Statistics [Text Block]

Key Fund Statistics

Table Summary
Total Net Assets	$183,708,894
# of Portfolio Holdings	84
Portfolio Turnover Rate	29%

Holdings [Text Block]

Country Allocation (% of total investments)

Table Summary
Value	Value
Other	4.1%
Hungary	1.5%
United States	2.0%
Mexico	2.3%
Poland	2.8%
South Africa	4.3%
Brazil	4.3%
India	12.1%
China	13.1%
Korea, Republic of	24.3%
Taiwan	29.2%

Largest Holdings [Text Block]

Top Ten Holdings (% of total investments)^{Footnote Referencea}

Table Summary
Taiwan Semiconductor Manufacturing Co. Ltd.	15.3%
Samsung Electronics Co. Ltd.	12.4%
SK Hynix, Inc.	5.2%
SK Square Co. Ltd.	4.0%
MediaTek, Inc.	3.3%
Tencent Holdings Ltd.	3.1%
Delta Electronics, Inc.	2.9%
Unimicron Technology Corp.	1.9%
Alibaba Group Holding Ltd.	1.8%
Hon Hai Precision Industry Co. Ltd.	1.6%
Total	51.5%

Footnote	Description
Footnote^a	Excluding cash equivalents.

Updated Prospectus Web Address

C000126912

Shareholder Report [Line Items]

Fund Name

Morgan Stanley Institutional Fund, Inc. - Emerging Markets Portfolio

Class Name

Class R6

Trading Symbol

MMMPX

Annual or Semi-Annual Statement [Text Block]

This semi-annual shareholder report contains important information about Morgan Stanley Institutional Fund, Inc. - Emerging Markets Portfolio for the period of January 1, 2026 to June 30, 2026.

Additional Information [Text Block]

You can find additional information about the Fund at www.morganstanley.com/im/shareholderreports. You can also request this information by contacting us at 1-800-869-6397.

Additional Information Phone Number

1-800-869-6397

Additional Information Website

Expenses [Text Block]

What were the Fund costs for the last six months?

(based on a hypothetical $10,000 investment)

Table Summary
Class Name	Costs of a $10,000 investment	Costs paid as a percentage of a $10,000 investment
Class R6	$56	0.97%^{Footnote Reference1}

Footnote	Description
Footnote¹	Annualized

Expenses Paid, Amount

$ 56

Expense Ratio, Percent

0.97%

^[24]

AssetsNet

$ 183,708,894

Holdings Count | Holding

InvestmentCompanyPortfolioTurnover

29.00%

Additional Fund Statistics [Text Block]

Key Fund Statistics

Table Summary
Total Net Assets	$183,708,894
# of Portfolio Holdings	84
Portfolio Turnover Rate	29%

Holdings [Text Block]

Country Allocation (% of total investments)

Table Summary
Value	Value
Other	4.1%
Hungary	1.5%
United States	2.0%
Mexico	2.3%
Poland	2.8%
South Africa	4.3%
Brazil	4.3%
India	12.1%
China	13.1%
Korea, Republic of	24.3%
Taiwan	29.2%

Largest Holdings [Text Block]

Top Ten Holdings (% of total investments)^{Footnote Referencea}

Table Summary
Taiwan Semiconductor Manufacturing Co. Ltd.	15.3%
Samsung Electronics Co. Ltd.	12.4%
SK Hynix, Inc.	5.2%
SK Square Co. Ltd.	4.0%
MediaTek, Inc.	3.3%
Tencent Holdings Ltd.	3.1%
Delta Electronics, Inc.	2.9%
Unimicron Technology Corp.	1.9%
Alibaba Group Holding Ltd.	1.8%
Hon Hai Precision Industry Co. Ltd.	1.6%
Total	51.5%

Footnote	Description
Footnote^a	Excluding cash equivalents.

Updated Prospectus Web Address

C000169209

Shareholder Report [Line Items]

Fund Name

Morgan Stanley Institutional Fund, Inc. - Global Concentrated Portfolio

Class Name

Class A

Trading Symbol

MLNAX

Annual or Semi-Annual Statement [Text Block]

This semi-annual shareholder report contains important information about Morgan Stanley Institutional Fund, Inc. - Global Concentrated Portfolio for the period of January 1, 2026 to June 30, 2026.

Additional Information [Text Block]

You can find additional information about the Fund at www.morganstanley.com/im/shareholderreports. You can also request this information by contacting us at 1-800-869-6397.

Additional Information Phone Number

1-800-869-6397

Additional Information Website

Expenses [Text Block]

What were the Fund costs for the last six months?

(based on a hypothetical $10,000 investment)

Table Summary
Class Name	Costs of a $10,000 investment	Costs paid as a percentage of a $10,000 investment
Class A	$63	1.25%^{Footnote Reference1}

Footnote	Description
Footnote¹	Annualized

Expenses Paid, Amount

$ 63

Expense Ratio, Percent

1.25%

^[25]

AssetsNet

$ 416,832,499

Holdings Count | Holding

InvestmentCompanyPortfolioTurnover

43.00%

Additional Fund Statistics [Text Block]

Key Fund Statistics

Table Summary
Total Net Assets	$416,832,499
# of Portfolio Holdings	22
Portfolio Turnover Rate	43%

Holdings [Text Block]

Sector Allocation (% of total investments)

Table Summary
Value	Value
Short-Term Investments	1.0%
Consumer Discretionary	1.2%
Consumer Staples	1.5%
Real Estate	3.1%
Energy	3.3%
Materials	4.2%
Health Care	7.4%
Industrials	7.5%
Communication Services	10.3%
Financials	27.3%
Information Technology	33.2%

Largest Holdings [Text Block]

Top Ten Holdings (% of total investments)^{Footnote Referencea}

Table Summary
NVIDIA Corp.	11.3%
Taiwan Semiconductor Manufacturing Co. Ltd.	10.7%
Alphabet, Inc.	10.3%
Eli Lilly & Co.	7.4%
Rolls-Royce Holdings PLC	6.8%
Mizuho Financial Group, Inc.	6.3%
Banco Santander SA	5.9%
Dell Technologies, Inc.	5.8%
JPMorgan Chase & Co.	5.6%
Standard Chartered PLC	4.5%
Total	74.6%

Footnote	Description
Footnote^a	Excluding cash equivalents.

Updated Prospectus Web Address

C000169210

Shareholder Report [Line Items]

Fund Name

Morgan Stanley Institutional Fund, Inc. - Global Concentrated Portfolio

Class Name

Class C

Trading Symbol

MLNCX

Annual or Semi-Annual Statement [Text Block]

This semi-annual shareholder report contains important information about Morgan Stanley Institutional Fund, Inc. - Global Concentrated Portfolio for the period of January 1, 2026 to June 30, 2026.

Additional Information [Text Block]

You can find additional information about the Fund at www.morganstanley.com/im/shareholderreports. You can also request this information by contacting us at 1-800-869-6397.

Additional Information Phone Number

1-800-869-6397

Additional Information Website

Expenses [Text Block]

What were the Fund costs for the last six months?

(based on a hypothetical $10,000 investment)

Table Summary
Class Name	Costs of a $10,000 investment	Costs paid as a percentage of a $10,000 investment
Class C	$101	2.00%^{Footnote Reference1}

Footnote	Description
Footnote¹	Annualized

Expenses Paid, Amount

$ 101

Expense Ratio, Percent

2.00%

^[26]

AssetsNet

$ 416,832,499

Holdings Count | Holding

InvestmentCompanyPortfolioTurnover

43.00%

Additional Fund Statistics [Text Block]

Key Fund Statistics

Table Summary
Total Net Assets	$416,832,499
# of Portfolio Holdings	22
Portfolio Turnover Rate	43%

Holdings [Text Block]

Sector Allocation (% of total investments)

Table Summary
Value	Value
Short-Term Investments	1.0%
Consumer Discretionary	1.2%
Consumer Staples	1.5%
Real Estate	3.1%
Energy	3.3%
Materials	4.2%
Health Care	7.4%
Industrials	7.5%
Communication Services	10.3%
Financials	27.3%
Information Technology	33.2%

Largest Holdings [Text Block]

Top Ten Holdings (% of total investments)^{Footnote Referencea}

Table Summary
NVIDIA Corp.	11.3%
Taiwan Semiconductor Manufacturing Co. Ltd.	10.7%
Alphabet, Inc.	10.3%
Eli Lilly & Co.	7.4%
Rolls-Royce Holdings PLC	6.8%
Mizuho Financial Group, Inc.	6.3%
Banco Santander SA	5.9%
Dell Technologies, Inc.	5.8%
JPMorgan Chase & Co.	5.6%
Standard Chartered PLC	4.5%
Total	74.6%

Footnote	Description
Footnote^a	Excluding cash equivalents.

Updated Prospectus Web Address

C000169208

Shareholder Report [Line Items]

Fund Name

Morgan Stanley Institutional Fund, Inc. - Global Concentrated Portfolio

Class Name

Class I

Trading Symbol

MLNIX

Annual or Semi-Annual Statement [Text Block]

This semi-annual shareholder report contains important information about Morgan Stanley Institutional Fund, Inc. - Global Concentrated Portfolio for the period of January 1, 2026 to June 30, 2026.

Additional Information [Text Block]

You can find additional information about the Fund at www.morganstanley.com/im/shareholderreports. You can also request this information by contacting us at 1-800-869-6397.

Additional Information Phone Number

1-800-869-6397

Additional Information Website

Expenses [Text Block]

What were the Fund costs for the last six months?

(based on a hypothetical $10,000 investment)

Table Summary
Class Name	Costs of a $10,000 investment	Costs paid as a percentage of a $10,000 investment
Class I	$50	0.99%^{Footnote Reference1}

Footnote	Description
Footnote¹	Annualized

Expenses Paid, Amount

$ 50

Expense Ratio, Percent

0.99%

^[27]

AssetsNet

$ 416,832,499

Holdings Count | Holding

InvestmentCompanyPortfolioTurnover

43.00%

Additional Fund Statistics [Text Block]

Key Fund Statistics

Table Summary
Total Net Assets	$416,832,499
# of Portfolio Holdings	22
Portfolio Turnover Rate	43%

Holdings [Text Block]

Sector Allocation (% of total investments)

Table Summary
Value	Value
Short-Term Investments	1.0%
Consumer Discretionary	1.2%
Consumer Staples	1.5%
Real Estate	3.1%
Energy	3.3%
Materials	4.2%
Health Care	7.4%
Industrials	7.5%
Communication Services	10.3%
Financials	27.3%
Information Technology	33.2%

Largest Holdings [Text Block]

Top Ten Holdings (% of total investments)^{Footnote Referencea}

Table Summary
NVIDIA Corp.	11.3%
Taiwan Semiconductor Manufacturing Co. Ltd.	10.7%
Alphabet, Inc.	10.3%
Eli Lilly & Co.	7.4%
Rolls-Royce Holdings PLC	6.8%
Mizuho Financial Group, Inc.	6.3%
Banco Santander SA	5.9%
Dell Technologies, Inc.	5.8%
JPMorgan Chase & Co.	5.6%
Standard Chartered PLC	4.5%
Total	74.6%

Footnote	Description
Footnote^a	Excluding cash equivalents.

Updated Prospectus Web Address

C000169211

Shareholder Report [Line Items]

Fund Name

Morgan Stanley Institutional Fund, Inc. - Global Concentrated Portfolio

Class Name

Class R6

Trading Symbol

MLNSX

Annual or Semi-Annual Statement [Text Block]

This semi-annual shareholder report contains important information about Morgan Stanley Institutional Fund, Inc. - Global Concentrated Portfolio for the period of January 1, 2026 to June 30, 2026.

Additional Information [Text Block]

You can find additional information about the Fund at www.morganstanley.com/im/shareholderreports. You can also request this information by contacting us at 1-800-869-6397.

Additional Information Phone Number

1-800-869-6397

Additional Information Website

Expenses [Text Block]

What were the Fund costs for the last six months?

(based on a hypothetical $10,000 investment)

Table Summary
Class Name	Costs of a $10,000 investment	Costs paid as a percentage of a $10,000 investment
Class R6	$48	0.95%^{Footnote Reference1}

Footnote	Description
Footnote¹	Annualized

Expenses Paid, Amount

$ 48

Expense Ratio, Percent

0.95%

^[28]

AssetsNet

$ 416,832,499

Holdings Count | Holding

InvestmentCompanyPortfolioTurnover

43.00%

Additional Fund Statistics [Text Block]

Key Fund Statistics

Table Summary
Total Net Assets	$416,832,499
# of Portfolio Holdings	22
Portfolio Turnover Rate	43%

Holdings [Text Block]

Sector Allocation (% of total investments)

Table Summary
Value	Value
Short-Term Investments	1.0%
Consumer Discretionary	1.2%
Consumer Staples	1.5%
Real Estate	3.1%
Energy	3.3%
Materials	4.2%
Health Care	7.4%
Industrials	7.5%
Communication Services	10.3%
Financials	27.3%
Information Technology	33.2%

Largest Holdings [Text Block]

Top Ten Holdings (% of total investments)^{Footnote Referencea}

Table Summary
NVIDIA Corp.	11.3%
Taiwan Semiconductor Manufacturing Co. Ltd.	10.7%
Alphabet, Inc.	10.3%
Eli Lilly & Co.	7.4%
Rolls-Royce Holdings PLC	6.8%
Mizuho Financial Group, Inc.	6.3%
Banco Santander SA	5.9%
Dell Technologies, Inc.	5.8%
JPMorgan Chase & Co.	5.6%
Standard Chartered PLC	4.5%
Total	74.6%

Footnote	Description
Footnote^a	Excluding cash equivalents.

Updated Prospectus Web Address

C000169213

Shareholder Report [Line Items]

Fund Name

Morgan Stanley Institutional Fund, Inc. - Global Core Portfolio

Class Name

Class A

Trading Symbol

MLMAX

Annual or Semi-Annual Statement [Text Block]

This semi-annual shareholder report contains important information about Morgan Stanley Institutional Fund, Inc. - Global Core Portfolio for the period of January 1, 2026 to June 30, 2026.

Additional Information [Text Block]

You can find additional information about the Fund at www.morganstanley.com/im/shareholderreports. You can also request this information by contacting us at 1-800-869-6397.

Additional Information Phone Number

1-800-869-6397

Additional Information Website

Expenses [Text Block]

What were the Fund costs for the last six months?

(based on a hypothetical $10,000 investment)

Table Summary
Class Name	Costs of a $10,000 investment	Costs paid as a percentage of a $10,000 investment
Class A	$66	1.30%^{Footnote Reference1}

Footnote	Description
Footnote¹	Annualized

Expenses Paid, Amount

$ 66

Expense Ratio, Percent

1.30%

^[29]

AssetsNet

$ 65,301,706

Holdings Count | Holding

InvestmentCompanyPortfolioTurnover

20.00%

Additional Fund Statistics [Text Block]

Key Fund Statistics

Table Summary
Total Net Assets	$65,301,706
# of Portfolio Holdings	41
Portfolio Turnover Rate	20%

Holdings [Text Block]

Sector Allocation (% of total investments)

Table Summary
Value	Value
Consumer Staples	0.2%
Short-Term Investments	0.8%
Real Estate	1.9%
Health Care	2.7%
Energy	3.0%
Materials	3.8%
Industrials	10.0%
Consumer Discretionary	11.0%
Communication Services	11.8%
Financials	25.8%
Information Technology	29.0%

Largest Holdings [Text Block]

Top Ten Holdings (% of total investments)^{Footnote Referencea}

Table Summary
Alphabet, Inc.	9.1%
Taiwan Semiconductor Manufacturing Co. Ltd.	8.6%
NVIDIA Corp.	7.2%
Apple, Inc.	7.0%
Banco Santander SA	5.3%
JPMorgan Chase & Co.	5.2%
Sumitomo Mitsui Financial Group, Inc.	4.1%
Amazon.com, Inc.	3.9%
TJX Cos., Inc.	3.8%
Rolls-Royce Holdings PLC	3.7%
Total	57.9%

Footnote	Description
Footnote^a	Excluding cash equivalents.

Updated Prospectus Web Address

C000169214

Shareholder Report [Line Items]

Fund Name

Morgan Stanley Institutional Fund, Inc. - Global Core Portfolio

Class Name

Class C

Trading Symbol

MLMCX

Annual or Semi-Annual Statement [Text Block]

This semi-annual shareholder report contains important information about Morgan Stanley Institutional Fund, Inc. - Global Core Portfolio for the period of January 1, 2026 to June 30, 2026.

Additional Information [Text Block]

You can find additional information about the Fund at www.morganstanley.com/im/shareholderreports. You can also request this information by contacting us at 1-800-869-6397.

Additional Information Phone Number

1-800-869-6397

Additional Information Website

Expenses [Text Block]

What were the Fund costs for the last six months?

(based on a hypothetical $10,000 investment)

Table Summary
Class Name	Costs of a $10,000 investment	Costs paid as a percentage of a $10,000 investment
Class C	$106	2.09%^{Footnote Reference1}

Footnote	Description
Footnote¹	Annualized

Expenses Paid, Amount

$ 106

Expense Ratio, Percent

2.09%

^[30]

AssetsNet

$ 65,301,706

Holdings Count | Holding

InvestmentCompanyPortfolioTurnover

20.00%

Additional Fund Statistics [Text Block]

Key Fund Statistics

Table Summary
Total Net Assets	$65,301,706
# of Portfolio Holdings	41
Portfolio Turnover Rate	20%

Holdings [Text Block]

Sector Allocation (% of total investments)

Table Summary
Value	Value
Consumer Staples	0.2%
Short-Term Investments	0.8%
Real Estate	1.9%
Health Care	2.7%
Energy	3.0%
Materials	3.8%
Industrials	10.0%
Consumer Discretionary	11.0%
Communication Services	11.8%
Financials	25.8%
Information Technology	29.0%

Largest Holdings [Text Block]

Top Ten Holdings (% of total investments)^{Footnote Referencea}

Table Summary
Alphabet, Inc.	9.1%
Taiwan Semiconductor Manufacturing Co. Ltd.	8.6%
NVIDIA Corp.	7.2%
Apple, Inc.	7.0%
Banco Santander SA	5.3%
JPMorgan Chase & Co.	5.2%
Sumitomo Mitsui Financial Group, Inc.	4.1%
Amazon.com, Inc.	3.9%
TJX Cos., Inc.	3.8%
Rolls-Royce Holdings PLC	3.7%
Total	57.9%

Footnote	Description
Footnote^a	Excluding cash equivalents.

Updated Prospectus Web Address

C000169212

Shareholder Report [Line Items]

Fund Name

Morgan Stanley Institutional Fund, Inc. - Global Core Portfolio

Class Name

Class I

Trading Symbol

MLMIX

Annual or Semi-Annual Statement [Text Block]

This semi-annual shareholder report contains important information about Morgan Stanley Institutional Fund, Inc. - Global Core Portfolio for the period of January 1, 2026 to June 30, 2026.

Additional Information [Text Block]

You can find additional information about the Fund at www.morganstanley.com/im/shareholderreports. You can also request this information by contacting us at 1-800-869-6397.

Additional Information Phone Number

1-800-869-6397

Additional Information Website

Expenses [Text Block]

What were the Fund costs for the last six months?

(based on a hypothetical $10,000 investment)

Table Summary
Class Name	Costs of a $10,000 investment	Costs paid as a percentage of a $10,000 investment
Class I	$51	1.00%^{Footnote Reference1}

Footnote	Description
Footnote¹	Annualized

Expenses Paid, Amount

$ 51

Expense Ratio, Percent

1.00%

^[31]

AssetsNet

$ 65,301,706

Holdings Count | Holding

InvestmentCompanyPortfolioTurnover

20.00%

Additional Fund Statistics [Text Block]

Key Fund Statistics

Table Summary
Total Net Assets	$65,301,706
# of Portfolio Holdings	41
Portfolio Turnover Rate	20%

Holdings [Text Block]

Sector Allocation (% of total investments)

Table Summary
Value	Value
Consumer Staples	0.2%
Short-Term Investments	0.8%
Real Estate	1.9%
Health Care	2.7%
Energy	3.0%
Materials	3.8%
Industrials	10.0%
Consumer Discretionary	11.0%
Communication Services	11.8%
Financials	25.8%
Information Technology	29.0%

Largest Holdings [Text Block]

Top Ten Holdings (% of total investments)^{Footnote Referencea}

Table Summary
Alphabet, Inc.	9.1%
Taiwan Semiconductor Manufacturing Co. Ltd.	8.6%
NVIDIA Corp.	7.2%
Apple, Inc.	7.0%
Banco Santander SA	5.3%
JPMorgan Chase & Co.	5.2%
Sumitomo Mitsui Financial Group, Inc.	4.1%
Amazon.com, Inc.	3.9%
TJX Cos., Inc.	3.8%
Rolls-Royce Holdings PLC	3.7%
Total	57.9%

Footnote	Description
Footnote^a	Excluding cash equivalents.

Updated Prospectus Web Address

C000169215

Shareholder Report [Line Items]

Fund Name

Morgan Stanley Institutional Fund, Inc. - Global Core Portfolio

Class Name

Class R6

Trading Symbol

MLMSX

Annual or Semi-Annual Statement [Text Block]

This semi-annual shareholder report contains important information about Morgan Stanley Institutional Fund, Inc. - Global Core Portfolio for the period of January 1, 2026 to June 30, 2026.

Additional Information [Text Block]

You can find additional information about the Fund at www.morganstanley.com/im/shareholderreports. You can also request this information by contacting us at 1-800-869-6397.

Additional Information Phone Number

1-800-869-6397

Additional Information Website

Expenses [Text Block]

What were the Fund costs for the last six months?

(based on a hypothetical $10,000 investment)

Table Summary
Class Name	Costs of a $10,000 investment	Costs paid as a percentage of a $10,000 investment
Class R6	$48	0.95%^{Footnote Reference1}

Footnote	Description
Footnote¹	Annualized

Expenses Paid, Amount

$ 48

Expense Ratio, Percent

0.95%

^[32]

AssetsNet

$ 65,301,706

Holdings Count | Holding

InvestmentCompanyPortfolioTurnover

20.00%

Additional Fund Statistics [Text Block]

Key Fund Statistics

Table Summary
Total Net Assets	$65,301,706
# of Portfolio Holdings	41
Portfolio Turnover Rate	20%

Holdings [Text Block]

Sector Allocation (% of total investments)

Table Summary
Value	Value
Consumer Staples	0.2%
Short-Term Investments	0.8%
Real Estate	1.9%
Health Care	2.7%
Energy	3.0%
Materials	3.8%
Industrials	10.0%
Consumer Discretionary	11.0%
Communication Services	11.8%
Financials	25.8%
Information Technology	29.0%

Largest Holdings [Text Block]

Top Ten Holdings (% of total investments)^{Footnote Referencea}

Table Summary
Alphabet, Inc.	9.1%
Taiwan Semiconductor Manufacturing Co. Ltd.	8.6%
NVIDIA Corp.	7.2%
Apple, Inc.	7.0%
Banco Santander SA	5.3%
JPMorgan Chase & Co.	5.2%
Sumitomo Mitsui Financial Group, Inc.	4.1%
Amazon.com, Inc.	3.9%
TJX Cos., Inc.	3.8%
Rolls-Royce Holdings PLC	3.7%
Total	57.9%

Footnote	Description
Footnote^a	Excluding cash equivalents.

Updated Prospectus Web Address

C000204518

Shareholder Report [Line Items]

Fund Name

Morgan Stanley Institutional Fund, Inc. - Global Endurance Portfolio

Class Name

Class A

Trading Symbol

MSJAX

Annual or Semi-Annual Statement [Text Block]

This semi-annual shareholder report contains important information about Morgan Stanley Institutional Fund, Inc. - Global Endurance Portfolio for the period of January 1, 2026 to June 30, 2026.

Additional Information [Text Block]

You can find additional information about the Fund at www.morganstanley.com/im/shareholderreports. You can also request this information by contacting us at 1-800-869-6397.

Additional Information Phone Number

1-800-869-6397

Additional Information Website

Expenses [Text Block]

What were the Fund costs for the last six months?

(based on a hypothetical $10,000 investment)

Table Summary
Class Name	Costs of a $10,000 investment	Costs paid as a percentage of a $10,000 investment
Class A	$70	1.34%^{Footnote Reference1}

Footnote	Description
Footnote¹	Annualized

Expenses Paid, Amount

$ 70

Expense Ratio, Percent

1.34%

^[33]

AssetsNet

$ 15,592,189

Holdings Count | Holding

InvestmentCompanyPortfolioTurnover

85.00%

Additional Fund Statistics [Text Block]

Key Fund Statistics

Table Summary
Total Net Assets	$15,592,189
# of Portfolio Holdings	32
Portfolio Turnover Rate	85%

Holdings [Text Block]

Sector Allocation (% of total investments)

Table Summary
Value	Value
Domestic Specialty	2.1%
Information Technology	2.5%
Financials	2.5%
Short-Term Investments	3.5%
Energy	3.5%
Consumer Staples	4.5%
Communication Services	5.9%
Industrials	7.3%
Health Care	29.9%
Consumer Discretionary	38.3%

Largest Holdings [Text Block]

Top Ten Holdings (% of total investments)^{Footnote Referencea}

Table Summary
Victoria PLC	18.5%
Roivant Sciences Ltd.	7.0%
Arbutus Biopharma Corp.	5.3%
QXO, Inc.	4.8%
Immunovant, Inc.	4.7%
Floor & Decor Holdings, Inc.	4.7%
Teleflex, Inc.	4.0%
Royalty Pharma PLC	3.7%
DraftKings, Inc.	3.6%
Calumet, Inc.	3.5%
Total	59.8%

Footnote	Description
Footnote^a	Excluding cash equivalents.

Updated Prospectus Web Address

C000204519

Shareholder Report [Line Items]

Fund Name

Morgan Stanley Institutional Fund, Inc. - Global Endurance Portfolio

Class Name

Class C

Trading Symbol

MSJCX

Annual or Semi-Annual Statement [Text Block]

This semi-annual shareholder report contains important information about Morgan Stanley Institutional Fund, Inc. - Global Endurance Portfolio for the period of January 1, 2026 to June 30, 2026.

Additional Information [Text Block]

You can find additional information about the Fund at www.morganstanley.com/im/shareholderreports. You can also request this information by contacting us at 1-800-869-6397.

Additional Information Phone Number

1-800-869-6397

Additional Information Website

Expenses [Text Block]

What were the Fund costs for the last six months?

(based on a hypothetical $10,000 investment)

Table Summary
Class Name	Costs of a $10,000 investment	Costs paid as a percentage of a $10,000 investment
Class C	$109	2.09%^{Footnote Reference1}

Footnote	Description
Footnote¹	Annualized

Expenses Paid, Amount

$ 109

Expense Ratio, Percent

2.09%

^[34]

AssetsNet

$ 15,592,189

Holdings Count | Holding

InvestmentCompanyPortfolioTurnover

85.00%

Additional Fund Statistics [Text Block]

Key Fund Statistics

Table Summary
Total Net Assets	$15,592,189
# of Portfolio Holdings	32
Portfolio Turnover Rate	85%

Holdings [Text Block]

Sector Allocation (% of total investments)

Table Summary
Value	Value
Domestic Specialty	2.1%
Information Technology	2.5%
Financials	2.5%
Short-Term Investments	3.5%
Energy	3.5%
Consumer Staples	4.5%
Communication Services	5.9%
Industrials	7.3%
Health Care	29.9%
Consumer Discretionary	38.3%

Largest Holdings [Text Block]

Top Ten Holdings (% of total investments)^{Footnote Referencea}

Table Summary
Victoria PLC	18.5%
Roivant Sciences Ltd.	7.0%
Arbutus Biopharma Corp.	5.3%
QXO, Inc.	4.8%
Immunovant, Inc.	4.7%
Floor & Decor Holdings, Inc.	4.7%
Teleflex, Inc.	4.0%
Royalty Pharma PLC	3.7%
DraftKings, Inc.	3.6%
Calumet, Inc.	3.5%
Total	59.8%

Footnote	Description
Footnote^a	Excluding cash equivalents.

Updated Prospectus Web Address

C000204520

Shareholder Report [Line Items]

Fund Name

Morgan Stanley Institutional Fund, Inc. - Global Endurance Portfolio

Class Name

Class I

Trading Symbol

MSJIX

Annual or Semi-Annual Statement [Text Block]

This semi-annual shareholder report contains important information about Morgan Stanley Institutional Fund, Inc. - Global Endurance Portfolio for the period of January 1, 2026 to June 30, 2026.

Additional Information [Text Block]

You can find additional information about the Fund at www.morganstanley.com/im/shareholderreports. You can also request this information by contacting us at 1-800-869-6397.

Additional Information Phone Number

1-800-869-6397

Additional Information Website

Expenses [Text Block]

What were the Fund costs for the last six months?

(based on a hypothetical $10,000 investment)

Table Summary
Class Name	Costs of a $10,000 investment	Costs paid as a percentage of a $10,000 investment
Class I	$52	0.99%^{Footnote Reference1}

Footnote	Description
Footnote¹	Annualized

Expenses Paid, Amount

$ 52

Expense Ratio, Percent

0.99%

^[35]

AssetsNet

$ 15,592,189

Holdings Count | Holding

InvestmentCompanyPortfolioTurnover

85.00%

Additional Fund Statistics [Text Block]

Key Fund Statistics

Table Summary
Total Net Assets	$15,592,189
# of Portfolio Holdings	32
Portfolio Turnover Rate	85%

Holdings [Text Block]

Sector Allocation (% of total investments)

Table Summary
Value	Value
Domestic Specialty	2.1%
Information Technology	2.5%
Financials	2.5%
Short-Term Investments	3.5%
Energy	3.5%
Consumer Staples	4.5%
Communication Services	5.9%
Industrials	7.3%
Health Care	29.9%
Consumer Discretionary	38.3%

Largest Holdings [Text Block]

Top Ten Holdings (% of total investments)^{Footnote Referencea}

Table Summary
Victoria PLC	18.5%
Roivant Sciences Ltd.	7.0%
Arbutus Biopharma Corp.	5.3%
QXO, Inc.	4.8%
Immunovant, Inc.	4.7%
Floor & Decor Holdings, Inc.	4.7%
Teleflex, Inc.	4.0%
Royalty Pharma PLC	3.7%
DraftKings, Inc.	3.6%
Calumet, Inc.	3.5%
Total	59.8%

Footnote	Description
Footnote^a	Excluding cash equivalents.

Updated Prospectus Web Address

C000204517

Shareholder Report [Line Items]

Fund Name

Morgan Stanley Institutional Fund, Inc. - Global Endurance Portfolio

Class Name

Class R6

Trading Symbol

MSJSX

Annual or Semi-Annual Statement [Text Block]

This semi-annual shareholder report contains important information about Morgan Stanley Institutional Fund, Inc. - Global Endurance Portfolio for the period of January 1, 2026 to June 30, 2026.

Additional Information [Text Block]

You can find additional information about the Fund at www.morganstanley.com/im/shareholderreports. You can also request this information by contacting us at 1-800-869-6397.

Additional Information Phone Number

1-800-869-6397

Additional Information Website

Expenses [Text Block]

What were the Fund costs for the last six months?

(based on a hypothetical $10,000 investment)

Table Summary
Class Name	Costs of a $10,000 investment	Costs paid as a percentage of a $10,000 investment
Class R6	$49	0.94%^{Footnote Reference1}

Footnote	Description
Footnote¹	Annualized

Expenses Paid, Amount

$ 49

Expense Ratio, Percent

0.94%

^[36]

AssetsNet

$ 15,592,189

Holdings Count | Holding

InvestmentCompanyPortfolioTurnover

85.00%

Additional Fund Statistics [Text Block]

Key Fund Statistics

Table Summary
Total Net Assets	$15,592,189
# of Portfolio Holdings	32
Portfolio Turnover Rate	85%

Holdings [Text Block]

Sector Allocation (% of total investments)

Table Summary
Value	Value
Domestic Specialty	2.1%
Information Technology	2.5%
Financials	2.5%
Short-Term Investments	3.5%
Energy	3.5%
Consumer Staples	4.5%
Communication Services	5.9%
Industrials	7.3%
Health Care	29.9%
Consumer Discretionary	38.3%

Largest Holdings [Text Block]

Top Ten Holdings (% of total investments)^{Footnote Referencea}

Table Summary
Victoria PLC	18.5%
Roivant Sciences Ltd.	7.0%
Arbutus Biopharma Corp.	5.3%
QXO, Inc.	4.8%
Immunovant, Inc.	4.7%
Floor & Decor Holdings, Inc.	4.7%
Teleflex, Inc.	4.0%
Royalty Pharma PLC	3.7%
DraftKings, Inc.	3.6%
Calumet, Inc.	3.5%
Total	59.8%

Footnote	Description
Footnote^a	Excluding cash equivalents.

Updated Prospectus Web Address

C000007755

Shareholder Report [Line Items]

Fund Name

Morgan Stanley Institutional Fund, Inc. - Global Franchise Portfolio

Class Name

Class A

Trading Symbol

MSFBX

Annual or Semi-Annual Statement [Text Block]

This semi-annual shareholder report contains important information about Morgan Stanley Institutional Fund, Inc. - Global Franchise Portfolio for the period of January 1, 2026 to June 30, 2026.

Additional Information [Text Block]

You can find additional information about the Fund at www.morganstanley.com/im/shareholderreports. You can also request this information by contacting us at 1-800-869-6397.

Additional Information Phone Number

1-800-869-6397

Additional Information Website

Expenses [Text Block]

What were the Fund costs for the last six months?

(based on a hypothetical $10,000 investment)

Table Summary
Class Name	Costs of a $10,000 investment	Costs paid as a percentage of a $10,000 investment
Class A	$59	1.27%^{Footnote Reference1}

Footnote	Description
Footnote¹	Annualized

Expenses Paid, Amount

$ 59

Expense Ratio, Percent

1.27%

^[37]

AssetsNet

$ 1,021,174,817

Holdings Count | Holding

InvestmentCompanyPortfolioTurnover

31.00%

Additional Fund Statistics [Text Block]

Key Fund Statistics

Table Summary
Total Net Assets	$1,021,174,817
# of Portfolio Holdings	35
Portfolio Turnover Rate	31%

Holdings [Text Block]

Sector Allocation (% of total investments)

Table Summary
Value	Value
Short-Term Investments	1.5%
Communication Services	10.4%
Health Care	11.7%
Consumer Discretionary	11.8%
Industrials	13.2%
Consumer Staples	15.0%
Information Technology	16.2%
Financials	20.2%

Largest Holdings [Text Block]

Top Ten Holdings (% of total investments)^{Footnote Referencea}

Table Summary
Alphabet, Inc.	6.4%
Taiwan Semiconductor Manufacturing Co. Ltd.	6.1%
Visa, Inc.	5.5%
Microsoft Corp.	4.7%
Coca-Cola Co.	4.7%
L'Oreal SA	4.7%
Aon PLC	4.6%
Netflix, Inc.	4.0%
Amazon.com, Inc.	3.6%
Ferrari NV	3.5%
Total	47.8%

Footnote	Description
Footnote^a	Excluding cash equivalents.

Updated Prospectus Web Address

C000155893

Shareholder Report [Line Items]

Fund Name

Morgan Stanley Institutional Fund, Inc. - Global Franchise Portfolio

Class Name

Class C

Trading Symbol

MSGFX

Annual or Semi-Annual Statement [Text Block]

This semi-annual shareholder report contains important information about Morgan Stanley Institutional Fund, Inc. - Global Franchise Portfolio for the period of January 1, 2026 to June 30, 2026.

Additional Information [Text Block]

You can find additional information about the Fund at www.morganstanley.com/im/shareholderreports. You can also request this information by contacting us at 1-800-869-6397.

Additional Information Phone Number

1-800-869-6397

Additional Information Website

Expenses [Text Block]

What were the Fund costs for the last six months?

(based on a hypothetical $10,000 investment)

Table Summary
Class Name	Costs of a $10,000 investment	Costs paid as a percentage of a $10,000 investment
Class C	$94	2.02%^{Footnote Reference1}

Footnote	Description
Footnote¹	Annualized

Expenses Paid, Amount

$ 94

Expense Ratio, Percent

2.02%

^[38]

AssetsNet

$ 1,021,174,817

Holdings Count | Holding

InvestmentCompanyPortfolioTurnover

31.00%

Additional Fund Statistics [Text Block]

Key Fund Statistics

Table Summary
Total Net Assets	$1,021,174,817
# of Portfolio Holdings	35
Portfolio Turnover Rate	31%

Holdings [Text Block]

Sector Allocation (% of total investments)

Table Summary
Value	Value
Short-Term Investments	1.5%
Communication Services	10.4%
Health Care	11.7%
Consumer Discretionary	11.8%
Industrials	13.2%
Consumer Staples	15.0%
Information Technology	16.2%
Financials	20.2%

Largest Holdings [Text Block]

Top Ten Holdings (% of total investments)^{Footnote Referencea}

Table Summary
Alphabet, Inc.	6.4%
Taiwan Semiconductor Manufacturing Co. Ltd.	6.1%
Visa, Inc.	5.5%
Microsoft Corp.	4.7%
Coca-Cola Co.	4.7%
L'Oreal SA	4.7%
Aon PLC	4.6%
Netflix, Inc.	4.0%
Amazon.com, Inc.	3.6%
Ferrari NV	3.5%
Total	47.8%

Footnote	Description
Footnote^a	Excluding cash equivalents.

Updated Prospectus Web Address

C000007754

Shareholder Report [Line Items]

Fund Name

Morgan Stanley Institutional Fund, Inc. - Global Franchise Portfolio

Class Name

Class I

Trading Symbol

MSFAX

Annual or Semi-Annual Statement [Text Block]

This semi-annual shareholder report contains important information about Morgan Stanley Institutional Fund, Inc. - Global Franchise Portfolio for the period of January 1, 2026 to June 30, 2026.

Additional Information [Text Block]

You can find additional information about the Fund at www.morganstanley.com/im/shareholderreports. You can also request this information by contacting us at 1-800-869-6397.

Additional Information Phone Number

1-800-869-6397

Additional Information Website

Expenses [Text Block]

What were the Fund costs for the last six months?

(based on a hypothetical $10,000 investment)

Table Summary
Class Name	Costs of a $10,000 investment	Costs paid as a percentage of a $10,000 investment
Class I	$47	1.00%^{Footnote Reference1}

Footnote	Description
Footnote¹	Annualized

Expenses Paid, Amount

$ 47

Expense Ratio, Percent

1.00%

^[39]

AssetsNet

$ 1,021,174,817

Holdings Count | Holding

InvestmentCompanyPortfolioTurnover

31.00%

Additional Fund Statistics [Text Block]

Key Fund Statistics

Table Summary
Total Net Assets	$1,021,174,817
# of Portfolio Holdings	35
Portfolio Turnover Rate	31%

Holdings [Text Block]

Sector Allocation (% of total investments)

Table Summary
Value	Value
Short-Term Investments	1.5%
Communication Services	10.4%
Health Care	11.7%
Consumer Discretionary	11.8%
Industrials	13.2%
Consumer Staples	15.0%
Information Technology	16.2%
Financials	20.2%

Largest Holdings [Text Block]

Top Ten Holdings (% of total investments)^{Footnote Referencea}

Table Summary
Alphabet, Inc.	6.4%
Taiwan Semiconductor Manufacturing Co. Ltd.	6.1%
Visa, Inc.	5.5%
Microsoft Corp.	4.7%
Coca-Cola Co.	4.7%
L'Oreal SA	4.7%
Aon PLC	4.6%
Netflix, Inc.	4.0%
Amazon.com, Inc.	3.6%
Ferrari NV	3.5%
Total	47.8%

Footnote	Description
Footnote^a	Excluding cash equivalents.

Updated Prospectus Web Address

C000113809

Shareholder Report [Line Items]

Fund Name

Morgan Stanley Institutional Fund, Inc. - Global Franchise Portfolio

Class Name

Class L

Trading Symbol

MSFLX

Annual or Semi-Annual Statement [Text Block]

This semi-annual shareholder report contains important information about Morgan Stanley Institutional Fund, Inc. - Global Franchise Portfolio for the period of January 1, 2026 to June 30, 2026.

Additional Information [Text Block]

You can find additional information about the Fund at www.morganstanley.com/im/shareholderreports. You can also request this information by contacting us at 1-800-869-6397.

Additional Information Phone Number

1-800-869-6397

Additional Information Website

Expenses [Text Block]

What were the Fund costs for the last six months?

(based on a hypothetical $10,000 investment)

Table Summary
Class Name	Costs of a $10,000 investment	Costs paid as a percentage of a $10,000 investment
Class L	$84	1.80%^{Footnote Reference1}

Footnote	Description
Footnote¹	Annualized

Expenses Paid, Amount

$ 84

Expense Ratio, Percent

1.80%

^[40]

AssetsNet

$ 1,021,174,817

Holdings Count | Holding

InvestmentCompanyPortfolioTurnover

31.00%

Additional Fund Statistics [Text Block]

Key Fund Statistics

Table Summary
Total Net Assets	$1,021,174,817
# of Portfolio Holdings	35
Portfolio Turnover Rate	31%

Holdings [Text Block]

Sector Allocation (% of total investments)

Table Summary
Value	Value
Short-Term Investments	1.5%
Communication Services	10.4%
Health Care	11.7%
Consumer Discretionary	11.8%
Industrials	13.2%
Consumer Staples	15.0%
Information Technology	16.2%
Financials	20.2%

Largest Holdings [Text Block]

Top Ten Holdings (% of total investments)^{Footnote Referencea}

Table Summary
Alphabet, Inc.	6.4%
Taiwan Semiconductor Manufacturing Co. Ltd.	6.1%
Visa, Inc.	5.5%
Microsoft Corp.	4.7%
Coca-Cola Co.	4.7%
L'Oreal SA	4.7%
Aon PLC	4.6%
Netflix, Inc.	4.0%
Amazon.com, Inc.	3.6%
Ferrari NV	3.5%
Total	47.8%

Footnote	Description
Footnote^a	Excluding cash equivalents.

Updated Prospectus Web Address

C000156276

Shareholder Report [Line Items]

Fund Name

Morgan Stanley Institutional Fund, Inc. - Global Franchise Portfolio

Class Name

Class R6

Trading Symbol

MGISX

Annual or Semi-Annual Statement [Text Block]

This semi-annual shareholder report contains important information about Morgan Stanley Institutional Fund, Inc. - Global Franchise Portfolio for the period of January 1, 2026 to June 30, 2026.

Additional Information [Text Block]

You can find additional information about the Fund at www.morganstanley.com/im/shareholderreports. You can also request this information by contacting us at 1-800-869-6397.

Additional Information Phone Number

1-800-869-6397

Additional Information Website

Expenses [Text Block]

What were the Fund costs for the last six months?

(based on a hypothetical $10,000 investment)

Table Summary
Class Name	Costs of a $10,000 investment	Costs paid as a percentage of a $10,000 investment
Class R6	$41	0.87%^{Footnote Reference1}

Footnote	Description
Footnote¹	Annualized

Expenses Paid, Amount

$ 41

Expense Ratio, Percent

0.87%

^[41]

AssetsNet

$ 1,021,174,817

Holdings Count | Holding

InvestmentCompanyPortfolioTurnover

31.00%

Additional Fund Statistics [Text Block]

Key Fund Statistics

Table Summary
Total Net Assets	$1,021,174,817
# of Portfolio Holdings	35
Portfolio Turnover Rate	31%

Holdings [Text Block]

Sector Allocation (% of total investments)

Table Summary
Value	Value
Short-Term Investments	1.5%
Communication Services	10.4%
Health Care	11.7%
Consumer Discretionary	11.8%
Industrials	13.2%
Consumer Staples	15.0%
Information Technology	16.2%
Financials	20.2%

Largest Holdings [Text Block]

Top Ten Holdings (% of total investments)^{Footnote Referencea}

Table Summary
Alphabet, Inc.	6.4%
Taiwan Semiconductor Manufacturing Co. Ltd.	6.1%
Visa, Inc.	5.5%
Microsoft Corp.	4.7%
Coca-Cola Co.	4.7%
L'Oreal SA	4.7%
Aon PLC	4.6%
Netflix, Inc.	4.0%
Amazon.com, Inc.	3.6%
Ferrari NV	3.5%
Total	47.8%

Footnote	Description
Footnote^a	Excluding cash equivalents.

Updated Prospectus Web Address

C000094893

Shareholder Report [Line Items]

Fund Name

Morgan Stanley Institutional Fund, Inc. - Global Insight Portfolio

Class Name

Class A

Trading Symbol

MIGPX

Annual or Semi-Annual Statement [Text Block]

This semi-annual shareholder report contains important information about Morgan Stanley Institutional Fund, Inc. - Global Insight Portfolio for the period of January 1, 2026 to June 30, 2026.

Additional Information [Text Block]

You can find additional information about the Fund at www.morganstanley.com/im/shareholderreports. You can also request this information by contacting us at 1-800-869-6397.

Additional Information Phone Number

1-800-869-6397

Additional Information Website

Expenses [Text Block]

What were the Fund costs for the last six months?

(based on a hypothetical $10,000 investment)

Table Summary
Class Name	Costs of a $10,000 investment	Costs paid as a percentage of a $10,000 investment
Class A	$65	1.31%^{Footnote Reference1}

Footnote	Description
Footnote¹	Annualized

Expenses Paid, Amount

$ 65

Expense Ratio, Percent

1.31%

^[42]

AssetsNet

$ 56,176,689

Holdings Count | Holding

InvestmentCompanyPortfolioTurnover

26.00%

Additional Fund Statistics [Text Block]

Key Fund Statistics

Table Summary
Total Net Assets	$56,176,689
# of Portfolio Holdings	40
Portfolio Turnover Rate	26%

Holdings [Text Block]

Sector Allocation (% of total investments)

Table Summary
Value	Value
Consumer Staples	0.1%
Short-Term Investments	2.2%
Real Estate	2.9%
Industrials	3.6%
Communication Services	9.9%
Financials	13.0%
Consumer Discretionary	13.6%
Health Care	18.7%
Information Technology	36.0%

Largest Holdings [Text Block]

Top Ten Holdings (% of total investments)^{Footnote Referencea}

Table Summary
Cloudflare, Inc.	13.4%
Royalty Pharma PLC	8.9%
Tesla, Inc.	8.1%
Roivant Sciences Ltd.	7.5%
Affirm Holdings, Inc.	7.3%
Aurora Innovation, Inc.	4.9%
Space Exploration Technologies Corp.	4.8%
AppLovin Corp.	4.7%
MercadoLibre, Inc.	4.6%
Shopify, Inc.	4.6%
Total	68.8%

Footnote	Description
Footnote^a	Excluding cash equivalents.

Updated Prospectus Web Address

C000155902

Shareholder Report [Line Items]

Fund Name

Morgan Stanley Institutional Fund, Inc. - Global Insight Portfolio

Class Name

Class C

Trading Symbol

MSPTX

Annual or Semi-Annual Statement [Text Block]

This semi-annual shareholder report contains important information about Morgan Stanley Institutional Fund, Inc. - Global Insight Portfolio for the period of January 1, 2026 to June 30, 2026.

Additional Information [Text Block]

You can find additional information about the Fund at www.morganstanley.com/im/shareholderreports. You can also request this information by contacting us at 1-800-869-6397.

Additional Information Phone Number

1-800-869-6397

Additional Information Website

Expenses [Text Block]

What were the Fund costs for the last six months?

(based on a hypothetical $10,000 investment)

Table Summary
Class Name	Costs of a $10,000 investment	Costs paid as a percentage of a $10,000 investment
Class C	$103	2.09%^{Footnote Reference1}

Footnote	Description
Footnote¹	Annualized

Expenses Paid, Amount

$ 103

Expense Ratio, Percent

2.09%

^[43]

AssetsNet

$ 56,176,689

Holdings Count | Holding

InvestmentCompanyPortfolioTurnover

26.00%

Additional Fund Statistics [Text Block]

Key Fund Statistics

Table Summary
Total Net Assets	$56,176,689
# of Portfolio Holdings	40
Portfolio Turnover Rate	26%

Holdings [Text Block]

Sector Allocation (% of total investments)

Table Summary
Value	Value
Consumer Staples	0.1%
Short-Term Investments	2.2%
Real Estate	2.9%
Industrials	3.6%
Communication Services	9.9%
Financials	13.0%
Consumer Discretionary	13.6%
Health Care	18.7%
Information Technology	36.0%

Largest Holdings [Text Block]

Top Ten Holdings (% of total investments)^{Footnote Referencea}

Table Summary
Cloudflare, Inc.	13.4%
Royalty Pharma PLC	8.9%
Tesla, Inc.	8.1%
Roivant Sciences Ltd.	7.5%
Affirm Holdings, Inc.	7.3%
Aurora Innovation, Inc.	4.9%
Space Exploration Technologies Corp.	4.8%
AppLovin Corp.	4.7%
MercadoLibre, Inc.	4.6%
Shopify, Inc.	4.6%
Total	68.8%

Footnote	Description
Footnote^a	Excluding cash equivalents.

Updated Prospectus Web Address

C000094891

Shareholder Report [Line Items]

Fund Name

Morgan Stanley Institutional Fund, Inc. - Global Insight Portfolio

Class Name

Class I

Trading Symbol

MIGIX

Annual or Semi-Annual Statement [Text Block]

This semi-annual shareholder report contains important information about Morgan Stanley Institutional Fund, Inc. - Global Insight Portfolio for the period of January 1, 2026 to June 30, 2026.

Additional Information [Text Block]

You can find additional information about the Fund at www.morganstanley.com/im/shareholderreports. You can also request this information by contacting us at 1-800-869-6397.

Additional Information Phone Number

1-800-869-6397

Additional Information Website

Expenses [Text Block]

What were the Fund costs for the last six months?

(based on a hypothetical $10,000 investment)

Table Summary
Class Name	Costs of a $10,000 investment	Costs paid as a percentage of a $10,000 investment
Class I	$49	0.99%^{Footnote Reference1}

Footnote	Description
Footnote¹	Annualized

Expenses Paid, Amount

$ 49

Expense Ratio, Percent

0.99%

^[44]

AssetsNet

$ 56,176,689

Holdings Count | Holding

InvestmentCompanyPortfolioTurnover

26.00%

Additional Fund Statistics [Text Block]

Key Fund Statistics

Table Summary
Total Net Assets	$56,176,689
# of Portfolio Holdings	40
Portfolio Turnover Rate	26%

Holdings [Text Block]

Sector Allocation (% of total investments)

Table Summary
Value	Value
Consumer Staples	0.1%
Short-Term Investments	2.2%
Real Estate	2.9%
Industrials	3.6%
Communication Services	9.9%
Financials	13.0%
Consumer Discretionary	13.6%
Health Care	18.7%
Information Technology	36.0%

Largest Holdings [Text Block]

Top Ten Holdings (% of total investments)^{Footnote Referencea}

Table Summary
Cloudflare, Inc.	13.4%
Royalty Pharma PLC	8.9%
Tesla, Inc.	8.1%
Roivant Sciences Ltd.	7.5%
Affirm Holdings, Inc.	7.3%
Aurora Innovation, Inc.	4.9%
Space Exploration Technologies Corp.	4.8%
AppLovin Corp.	4.7%
MercadoLibre, Inc.	4.6%
Shopify, Inc.	4.6%
Total	68.8%

Footnote	Description
Footnote^a	Excluding cash equivalents.

Updated Prospectus Web Address

C000094892

Shareholder Report [Line Items]

Fund Name

Morgan Stanley Institutional Fund, Inc. - Global Insight Portfolio

Class Name

Class L

Trading Symbol

MIGLX

Annual or Semi-Annual Statement [Text Block]

This semi-annual shareholder report contains important information about Morgan Stanley Institutional Fund, Inc. - Global Insight Portfolio for the period of January 1, 2026 to June 30, 2026.

Additional Information [Text Block]

You can find additional information about the Fund at www.morganstanley.com/im/shareholderreports. You can also request this information by contacting us at 1-800-869-6397.

Additional Information Phone Number

1-800-869-6397

Additional Information Website

Expenses [Text Block]

What were the Fund costs for the last six months?

(based on a hypothetical $10,000 investment)

Table Summary
Class Name	Costs of a $10,000 investment	Costs paid as a percentage of a $10,000 investment
Class L	$91	1.84%^{Footnote Reference1}

Footnote	Description
Footnote¹	Annualized

Expenses Paid, Amount

$ 91

Expense Ratio, Percent

1.84%

^[45]

AssetsNet

$ 56,176,689

Holdings Count | Holding

InvestmentCompanyPortfolioTurnover

26.00%

Additional Fund Statistics [Text Block]

Key Fund Statistics

Table Summary
Total Net Assets	$56,176,689
# of Portfolio Holdings	40
Portfolio Turnover Rate	26%

Holdings [Text Block]

Sector Allocation (% of total investments)

Table Summary
Value	Value
Consumer Staples	0.1%
Short-Term Investments	2.2%
Real Estate	2.9%
Industrials	3.6%
Communication Services	9.9%
Financials	13.0%
Consumer Discretionary	13.6%
Health Care	18.7%
Information Technology	36.0%

Largest Holdings [Text Block]

Top Ten Holdings (% of total investments)^{Footnote Referencea}

Table Summary
Cloudflare, Inc.	13.4%
Royalty Pharma PLC	8.9%
Tesla, Inc.	8.1%
Roivant Sciences Ltd.	7.5%
Affirm Holdings, Inc.	7.3%
Aurora Innovation, Inc.	4.9%
Space Exploration Technologies Corp.	4.8%
AppLovin Corp.	4.7%
MercadoLibre, Inc.	4.6%
Shopify, Inc.	4.6%
Total	68.8%

Footnote	Description
Footnote^a	Excluding cash equivalents.

Updated Prospectus Web Address

C000228507

Shareholder Report [Line Items]

Fund Name

Morgan Stanley Institutional Fund, Inc. - Global Insight Portfolio

Class Name

Class R6

Trading Symbol

MGZZX

Annual or Semi-Annual Statement [Text Block]

This semi-annual shareholder report contains important information about Morgan Stanley Institutional Fund, Inc. - Global Insight Portfolio for the period of January 1, 2026 to June 30, 2026.

Additional Information [Text Block]

You can find additional information about the Fund at www.morganstanley.com/im/shareholderreports. You can also request this information by contacting us at 1-800-869-6397.

Additional Information Phone Number

1-800-869-6397

Additional Information Website

Expenses [Text Block]

What were the Fund costs for the last six months?

(based on a hypothetical $10,000 investment)

Table Summary
Class Name	Costs of a $10,000 investment	Costs paid as a percentage of a $10,000 investment
Class R6	$47	0.94%^{Footnote Reference1}

Footnote	Description
Footnote¹	Annualized

Expenses Paid, Amount

$ 47

Expense Ratio, Percent

0.94%

^[46]

AssetsNet

$ 56,176,689

Holdings Count | Holding

InvestmentCompanyPortfolioTurnover

26.00%

Additional Fund Statistics [Text Block]

Key Fund Statistics

Table Summary
Total Net Assets	$56,176,689
# of Portfolio Holdings	40
Portfolio Turnover Rate	26%

Holdings [Text Block]

Sector Allocation (% of total investments)

Table Summary
Value	Value
Consumer Staples	0.1%
Short-Term Investments	2.2%
Real Estate	2.9%
Industrials	3.6%
Communication Services	9.9%
Financials	13.0%
Consumer Discretionary	13.6%
Health Care	18.7%
Information Technology	36.0%

Largest Holdings [Text Block]

Top Ten Holdings (% of total investments)^{Footnote Referencea}

Table Summary
Cloudflare, Inc.	13.4%
Royalty Pharma PLC	8.9%
Tesla, Inc.	8.1%
Roivant Sciences Ltd.	7.5%
Affirm Holdings, Inc.	7.3%
Aurora Innovation, Inc.	4.9%
Space Exploration Technologies Corp.	4.8%
AppLovin Corp.	4.7%
MercadoLibre, Inc.	4.6%
Shopify, Inc.	4.6%
Total	68.8%

Footnote	Description
Footnote^a	Excluding cash equivalents.

Updated Prospectus Web Address

C000085100

Shareholder Report [Line Items]

Fund Name

Morgan Stanley Institutional Fund, Inc. - Global Opportunity Portfolio

Class Name

Class A

Trading Symbol

MGGPX

Annual or Semi-Annual Statement [Text Block]

This semi-annual shareholder report contains important information about Morgan Stanley Institutional Fund, Inc. - Global Opportunity Portfolio for the period of January 1, 2026 to June 30, 2026.

Additional Information [Text Block]

You can find additional information about the Fund at www.morganstanley.com/im/shareholderreports. You can also request this information by contacting us at 1-800-869-6397.

Additional Information Phone Number

1-800-869-6397

Additional Information Website

Expenses [Text Block]

What were the Fund costs for the last six months?

(based on a hypothetical $10,000 investment)

Table Summary
Class Name	Costs of a $10,000 investment	Costs paid as a percentage of a $10,000 investment
Class A	$64	1.25%^{Footnote Reference1}

Footnote	Description
Footnote¹	Annualized

Expenses Paid, Amount

$ 64

Expense Ratio, Percent

1.25%

^[47]

AssetsNet

$ 3,012,628,893

Holdings Count | Holding

InvestmentCompanyPortfolioTurnover

15.00%

Additional Fund Statistics [Text Block]

Key Fund Statistics

Table Summary
Total Net Assets	$3,012,628,893
# of Portfolio Holdings	38
Portfolio Turnover Rate	15%

Holdings [Text Block]

Sector Allocation (% of total investments)

Table Summary
Value	Value
Short-Term Investments	1.2%
Industrials	10.0%
Financials	12.8%
Communication Services	18.5%
Consumer Discretionary	23.8%
Information Technology	33.7%

Largest Holdings [Text Block]

Top Ten Holdings (% of total investments)^{Footnote Referencea}

Table Summary
SK Hynix, Inc.	9.6%
Taiwan Semiconductor Manufacturing Co. Ltd.	8.9%
ASML Holding NV	5.6%
Meta Platforms, Inc.	5.2%
Samsung Electronics Co. Ltd.	4.5%
Uber Technologies, Inc.	4.5%
Spotify Technology SA	4.2%
Hermes International SCA	3.8%
DoorDash, Inc.	3.6%
MercadoLibre, Inc.	3.4%
Total	53.3%

Footnote	Description
Footnote^a	Excluding cash equivalents.

Updated Prospectus Web Address

C000155900

Shareholder Report [Line Items]

Fund Name

Morgan Stanley Institutional Fund, Inc. - Global Opportunity Portfolio

Class Name

Class C

Trading Symbol

MSOPX

Annual or Semi-Annual Statement [Text Block]

This semi-annual shareholder report contains important information about Morgan Stanley Institutional Fund, Inc. - Global Opportunity Portfolio for the period of January 1, 2026 to June 30, 2026.

Additional Information [Text Block]

You can find additional information about the Fund at www.morganstanley.com/im/shareholderreports. You can also request this information by contacting us at 1-800-869-6397.

Additional Information Phone Number

1-800-869-6397

Additional Information Website

Expenses [Text Block]

What were the Fund costs for the last six months?

(based on a hypothetical $10,000 investment)

Table Summary
Class Name	Costs of a $10,000 investment	Costs paid as a percentage of a $10,000 investment
Class C	$100	1.96%^{Footnote Reference1}

Footnote	Description
Footnote¹	Annualized

Expenses Paid, Amount

$ 100

Expense Ratio, Percent

1.96%

^[48]

AssetsNet

$ 3,012,628,893

Holdings Count | Holding

InvestmentCompanyPortfolioTurnover

15.00%

Additional Fund Statistics [Text Block]

Key Fund Statistics

Table Summary
Total Net Assets	$3,012,628,893
# of Portfolio Holdings	38
Portfolio Turnover Rate	15%

Holdings [Text Block]

Sector Allocation (% of total investments)

Table Summary
Value	Value
Short-Term Investments	1.2%
Industrials	10.0%
Financials	12.8%
Communication Services	18.5%
Consumer Discretionary	23.8%
Information Technology	33.7%

Largest Holdings [Text Block]

Top Ten Holdings (% of total investments)^{Footnote Referencea}

Table Summary
SK Hynix, Inc.	9.6%
Taiwan Semiconductor Manufacturing Co. Ltd.	8.9%
ASML Holding NV	5.6%
Meta Platforms, Inc.	5.2%
Samsung Electronics Co. Ltd.	4.5%
Uber Technologies, Inc.	4.5%
Spotify Technology SA	4.2%
Hermes International SCA	3.8%
DoorDash, Inc.	3.6%
MercadoLibre, Inc.	3.4%
Total	53.3%

Footnote	Description
Footnote^a	Excluding cash equivalents.

Updated Prospectus Web Address

C000085098

Shareholder Report [Line Items]

Fund Name

Morgan Stanley Institutional Fund, Inc. - Global Opportunity Portfolio

Class Name

Class I

Trading Symbol

MGGIX

Annual or Semi-Annual Statement [Text Block]

This semi-annual shareholder report contains important information about Morgan Stanley Institutional Fund, Inc. - Global Opportunity Portfolio for the period of January 1, 2026 to June 30, 2026.

Additional Information [Text Block]

You can find additional information about the Fund at www.morganstanley.com/im/shareholderreports. You can also request this information by contacting us at 1-800-869-6397.

Additional Information Phone Number

1-800-869-6397

Additional Information Website

Expenses [Text Block]

What were the Fund costs for the last six months?

(based on a hypothetical $10,000 investment)

Table Summary
Class Name	Costs of a $10,000 investment	Costs paid as a percentage of a $10,000 investment
Class I	$49	0.95%^{Footnote Reference1}

Footnote	Description
Footnote¹	Annualized

Expenses Paid, Amount

$ 49

Expense Ratio, Percent

0.95%

^[49]

AssetsNet

$ 3,012,628,893

Holdings Count | Holding

InvestmentCompanyPortfolioTurnover

15.00%

Additional Fund Statistics [Text Block]

Key Fund Statistics

Table Summary
Total Net Assets	$3,012,628,893
# of Portfolio Holdings	38
Portfolio Turnover Rate	15%

Holdings [Text Block]

Sector Allocation (% of total investments)

Table Summary
Value	Value
Short-Term Investments	1.2%
Industrials	10.0%
Financials	12.8%
Communication Services	18.5%
Consumer Discretionary	23.8%
Information Technology	33.7%

Largest Holdings [Text Block]

Top Ten Holdings (% of total investments)^{Footnote Referencea}

Table Summary
SK Hynix, Inc.	9.6%
Taiwan Semiconductor Manufacturing Co. Ltd.	8.9%
ASML Holding NV	5.6%
Meta Platforms, Inc.	5.2%
Samsung Electronics Co. Ltd.	4.5%
Uber Technologies, Inc.	4.5%
Spotify Technology SA	4.2%
Hermes International SCA	3.8%
DoorDash, Inc.	3.6%
MercadoLibre, Inc.	3.4%
Total	53.3%

Footnote	Description
Footnote^a	Excluding cash equivalents.

Updated Prospectus Web Address

C000198822

Shareholder Report [Line Items]

Fund Name

Morgan Stanley Institutional Fund, Inc. - Global Opportunity Portfolio

Class Name

Class IR

Trading Symbol

MGORX

Annual or Semi-Annual Statement [Text Block]

This semi-annual shareholder report contains important information about Morgan Stanley Institutional Fund, Inc. - Global Opportunity Portfolio for the period of January 1, 2026 to June 30, 2026.

Additional Information [Text Block]

You can find additional information about the Fund at www.morganstanley.com/im/shareholderreports. You can also request this information by contacting us at 1-800-869-6397.

Additional Information Phone Number

1-800-869-6397

Additional Information Website

Expenses [Text Block]

What were the Fund costs for the last six months?

(based on a hypothetical $10,000 investment)

Table Summary
Class Name	Costs of a $10,000 investment	Costs paid as a percentage of a $10,000 investment
Class IR	$44	0.85%^{Footnote Reference1}

Footnote	Description
Footnote¹	Annualized

Expenses Paid, Amount

$ 44

Expense Ratio, Percent

0.85%

^[50]

AssetsNet

$ 3,012,628,893

Holdings Count | Holding

InvestmentCompanyPortfolioTurnover

15.00%

Additional Fund Statistics [Text Block]

Key Fund Statistics

Table Summary
Total Net Assets	$3,012,628,893
# of Portfolio Holdings	38
Portfolio Turnover Rate	15%

Holdings [Text Block]

Sector Allocation (% of total investments)

Table Summary
Value	Value
Short-Term Investments	1.2%
Industrials	10.0%
Financials	12.8%
Communication Services	18.5%
Consumer Discretionary	23.8%
Information Technology	33.7%

Largest Holdings [Text Block]

Top Ten Holdings (% of total investments)^{Footnote Referencea}

Table Summary
SK Hynix, Inc.	9.6%
Taiwan Semiconductor Manufacturing Co. Ltd.	8.9%
ASML Holding NV	5.6%
Meta Platforms, Inc.	5.2%
Samsung Electronics Co. Ltd.	4.5%
Uber Technologies, Inc.	4.5%
Spotify Technology SA	4.2%
Hermes International SCA	3.8%
DoorDash, Inc.	3.6%
MercadoLibre, Inc.	3.4%
Total	53.3%

Footnote	Description
Footnote^a	Excluding cash equivalents.

Updated Prospectus Web Address

C000085099

Shareholder Report [Line Items]

Fund Name

Morgan Stanley Institutional Fund, Inc. - Global Opportunity Portfolio

Class Name

Class L

Trading Symbol

MGGLX

Annual or Semi-Annual Statement [Text Block]

This semi-annual shareholder report contains important information about Morgan Stanley Institutional Fund, Inc. - Global Opportunity Portfolio for the period of January 1, 2026 to June 30, 2026.

Additional Information [Text Block]

You can find additional information about the Fund at www.morganstanley.com/im/shareholderreports. You can also request this information by contacting us at 1-800-869-6397.

Additional Information Phone Number

1-800-869-6397

Additional Information Website

Expenses [Text Block]

What were the Fund costs for the last six months?

(based on a hypothetical $10,000 investment)

Table Summary
Class Name	Costs of a $10,000 investment	Costs paid as a percentage of a $10,000 investment
Class L	$68	1.33%^{Footnote Reference1}

Footnote	Description
Footnote¹	Annualized

Expenses Paid, Amount

$ 68

Expense Ratio, Percent

1.33%

^[51]

AssetsNet

$ 3,012,628,893

Holdings Count | Holding

InvestmentCompanyPortfolioTurnover

15.00%

Additional Fund Statistics [Text Block]

Key Fund Statistics

Table Summary
Total Net Assets	$3,012,628,893
# of Portfolio Holdings	38
Portfolio Turnover Rate	15%

Holdings [Text Block]

Sector Allocation (% of total investments)

Table Summary
Value	Value
Short-Term Investments	1.2%
Industrials	10.0%
Financials	12.8%
Communication Services	18.5%
Consumer Discretionary	23.8%
Information Technology	33.7%

Largest Holdings [Text Block]

Top Ten Holdings (% of total investments)^{Footnote Referencea}

Table Summary
SK Hynix, Inc.	9.6%
Taiwan Semiconductor Manufacturing Co. Ltd.	8.9%
ASML Holding NV	5.6%
Meta Platforms, Inc.	5.2%
Samsung Electronics Co. Ltd.	4.5%
Uber Technologies, Inc.	4.5%
Spotify Technology SA	4.2%
Hermes International SCA	3.8%
DoorDash, Inc.	3.6%
MercadoLibre, Inc.	3.4%
Total	53.3%

Footnote	Description
Footnote^a	Excluding cash equivalents.

Updated Prospectus Web Address

C000126921

Shareholder Report [Line Items]

Fund Name

Morgan Stanley Institutional Fund, Inc. - Global Opportunity Portfolio

Class Name

Class R6

Trading Symbol

MGTSX

Annual or Semi-Annual Statement [Text Block]

This semi-annual shareholder report contains important information about Morgan Stanley Institutional Fund, Inc. - Global Opportunity Portfolio for the period of January 1, 2026 to June 30, 2026.

Additional Information [Text Block]

You can find additional information about the Fund at www.morganstanley.com/im/shareholderreports. You can also request this information by contacting us at 1-800-869-6397.

Additional Information Phone Number

1-800-869-6397

Additional Information Website

Expenses [Text Block]

What were the Fund costs for the last six months?

(based on a hypothetical $10,000 investment)

Table Summary
Class Name	Costs of a $10,000 investment	Costs paid as a percentage of a $10,000 investment
Class R6	$44	0.85%^{Footnote Reference1}

Footnote	Description
Footnote¹	Annualized

Expenses Paid, Amount

$ 44

Expense Ratio, Percent

0.85%

^[52]

AssetsNet

$ 3,012,628,893

Holdings Count | Holding

InvestmentCompanyPortfolioTurnover

15.00%

Additional Fund Statistics [Text Block]

Key Fund Statistics

Table Summary
Total Net Assets	$3,012,628,893
# of Portfolio Holdings	38
Portfolio Turnover Rate	15%

Holdings [Text Block]

Sector Allocation (% of total investments)

Table Summary
Value	Value
Short-Term Investments	1.2%
Industrials	10.0%
Financials	12.8%
Communication Services	18.5%
Consumer Discretionary	23.8%
Information Technology	33.7%

Largest Holdings [Text Block]

Top Ten Holdings (% of total investments)^{Footnote Referencea}

Table Summary
SK Hynix, Inc.	9.6%
Taiwan Semiconductor Manufacturing Co. Ltd.	8.9%
ASML Holding NV	5.6%
Meta Platforms, Inc.	5.2%
Samsung Electronics Co. Ltd.	4.5%
Uber Technologies, Inc.	4.5%
Spotify Technology SA	4.2%
Hermes International SCA	3.8%
DoorDash, Inc.	3.6%
MercadoLibre, Inc.	3.4%
Total	53.3%

Footnote	Description
Footnote^a	Excluding cash equivalents.

Updated Prospectus Web Address

C000211166

Shareholder Report [Line Items]

Fund Name

Morgan Stanley Institutional Fund, Inc. - Global Permanence Portfolio

Class Name

Class A

Trading Symbol

MGKAX

Annual or Semi-Annual Statement [Text Block]

This semi-annual shareholder report contains important information about Morgan Stanley Institutional Fund, Inc. - Global Permanence Portfolio for the period of January 1, 2026 to June 30, 2026.

Additional Information [Text Block]

You can find additional information about the Fund at www.morganstanley.com/im/shareholderreports. You can also request this information by contacting us at 1-800-869-6397.

Additional Information Phone Number

1-800-869-6397

Additional Information Website

Expenses [Text Block]

What were the Fund costs for the last six months?

(based on a hypothetical $10,000 investment)

Table Summary
Class Name	Costs of a $10,000 investment	Costs paid as a percentage of a $10,000 investment
Class A	$66	1.34%^{Footnote Reference1}

Footnote	Description
Footnote¹	Annualized

Expenses Paid, Amount

$ 66

Expense Ratio, Percent

1.34%

^[53]

AssetsNet

$ 45,200,437

Holdings Count | Holding

InvestmentCompanyPortfolioTurnover

34.00%

Additional Fund Statistics [Text Block]

Key Fund Statistics

Table Summary
Total Net Assets	$45,200,437
# of Portfolio Holdings	49
Portfolio Turnover Rate	34%

Holdings [Text Block]

Sector Allocation (% of total investments)

Table Summary
Value	Value
Real Estate	0.2%
Energy	0.5%
Materials	1.3%
Short-Term Investments	3.7%
Consumer Staples	4.6%
Financials	6.5%
Communication Services	8.9%
Consumer Discretionary	14.3%
Health Care	17.5%
Information Technology	18.8%
Industrials	23.7%

Largest Holdings [Text Block]

Top Ten Holdings (% of total investments)^{Footnote Referencea}

Table Summary
Cloudflare, Inc.	13.3%
Royalty Pharma PLC	8.6%
Canadian National Railway Co.	4.7%
Eurofins Scientific SE	4.7%
QXO, Inc.	4.7%
MercadoLibre, Inc.	4.6%
Spotify Technology SA	4.3%
Core & Main, Inc.	3.4%
Medline, Inc.	3.2%
Madison Air Solutions Corp.	3.0%
Total	54.5%

Footnote	Description
Footnote^a	Excluding cash equivalents.

Updated Prospectus Web Address

C000211167

Shareholder Report [Line Items]

Fund Name

Morgan Stanley Institutional Fund, Inc. - Global Permanence Portfolio

Class Name

Class C

Trading Symbol

MGKCX

Annual or Semi-Annual Statement [Text Block]

This semi-annual shareholder report contains important information about Morgan Stanley Institutional Fund, Inc. - Global Permanence Portfolio for the period of January 1, 2026 to June 30, 2026.

Additional Information [Text Block]

You can find additional information about the Fund at www.morganstanley.com/im/shareholderreports. You can also request this information by contacting us at 1-800-869-6397.

Additional Information Phone Number

1-800-869-6397

Additional Information Website

Expenses [Text Block]

What were the Fund costs for the last six months?

(based on a hypothetical $10,000 investment)

Table Summary
Class Name	Costs of a $10,000 investment	Costs paid as a percentage of a $10,000 investment
Class C	$103	2.09%^{Footnote Reference1}

Footnote	Description
Footnote¹	Annualized

Expenses Paid, Amount

$ 103

Expense Ratio, Percent

2.09%

^[54]

AssetsNet

$ 45,200,437

Holdings Count | Holding

InvestmentCompanyPortfolioTurnover

34.00%

Additional Fund Statistics [Text Block]

Key Fund Statistics

Table Summary
Total Net Assets	$45,200,437
# of Portfolio Holdings	49
Portfolio Turnover Rate	34%

Holdings [Text Block]

Sector Allocation (% of total investments)

Table Summary
Value	Value
Real Estate	0.2%
Energy	0.5%
Materials	1.3%
Short-Term Investments	3.7%
Consumer Staples	4.6%
Financials	6.5%
Communication Services	8.9%
Consumer Discretionary	14.3%
Health Care	17.5%
Information Technology	18.8%
Industrials	23.7%

Largest Holdings [Text Block]

Top Ten Holdings (% of total investments)^{Footnote Referencea}

Table Summary
Cloudflare, Inc.	13.3%
Royalty Pharma PLC	8.6%
Canadian National Railway Co.	4.7%
Eurofins Scientific SE	4.7%
QXO, Inc.	4.7%
MercadoLibre, Inc.	4.6%
Spotify Technology SA	4.3%
Core & Main, Inc.	3.4%
Medline, Inc.	3.2%
Madison Air Solutions Corp.	3.0%
Total	54.5%

Footnote	Description
Footnote^a	Excluding cash equivalents.

Updated Prospectus Web Address

C000211168

Shareholder Report [Line Items]

Fund Name

Morgan Stanley Institutional Fund, Inc. - Global Permanence Portfolio

Class Name

Class I

Trading Symbol

MGKIX

Annual or Semi-Annual Statement [Text Block]

This semi-annual shareholder report contains important information about Morgan Stanley Institutional Fund, Inc. - Global Permanence Portfolio for the period of January 1, 2026 to June 30, 2026.

Additional Information [Text Block]

You can find additional information about the Fund at www.morganstanley.com/im/shareholderreports. You can also request this information by contacting us at 1-800-869-6397.

Additional Information Phone Number

1-800-869-6397

Additional Information Website

Expenses [Text Block]

What were the Fund costs for the last six months?

(based on a hypothetical $10,000 investment)

Table Summary
Class Name	Costs of a $10,000 investment	Costs paid as a percentage of a $10,000 investment
Class I	$49	0.99%^{Footnote Reference1}

Footnote	Description
Footnote¹	Annualized

Expenses Paid, Amount

$ 49

Expense Ratio, Percent

0.99%

^[55]

AssetsNet

$ 45,200,437

Holdings Count | Holding

InvestmentCompanyPortfolioTurnover

34.00%

Additional Fund Statistics [Text Block]

Key Fund Statistics

Table Summary
Total Net Assets	$45,200,437
# of Portfolio Holdings	49
Portfolio Turnover Rate	34%

Holdings [Text Block]

Sector Allocation (% of total investments)

Table Summary
Value	Value
Real Estate	0.2%
Energy	0.5%
Materials	1.3%
Short-Term Investments	3.7%
Consumer Staples	4.6%
Financials	6.5%
Communication Services	8.9%
Consumer Discretionary	14.3%
Health Care	17.5%
Information Technology	18.8%
Industrials	23.7%

Largest Holdings [Text Block]

Top Ten Holdings (% of total investments)^{Footnote Referencea}

Table Summary
Cloudflare, Inc.	13.3%
Royalty Pharma PLC	8.6%
Canadian National Railway Co.	4.7%
Eurofins Scientific SE	4.7%
QXO, Inc.	4.7%
MercadoLibre, Inc.	4.6%
Spotify Technology SA	4.3%
Core & Main, Inc.	3.4%
Medline, Inc.	3.2%
Madison Air Solutions Corp.	3.0%
Total	54.5%

Footnote	Description
Footnote^a	Excluding cash equivalents.

Updated Prospectus Web Address

C000211165

Shareholder Report [Line Items]

Fund Name

Morgan Stanley Institutional Fund, Inc. - Global Permanence Portfolio

Class Name

Class R6

Trading Symbol

MGKQX

Annual or Semi-Annual Statement [Text Block]

This semi-annual shareholder report contains important information about Morgan Stanley Institutional Fund, Inc. - Global Permanence Portfolio for the period of January 1, 2026 to June 30, 2026.

Additional Information [Text Block]

You can find additional information about the Fund at www.morganstanley.com/im/shareholderreports. You can also request this information by contacting us at 1-800-869-6397.

Additional Information Phone Number

1-800-869-6397

Additional Information Website

Expenses [Text Block]

What were the Fund costs for the last six months?

(based on a hypothetical $10,000 investment)

Table Summary
Class Name	Costs of a $10,000 investment	Costs paid as a percentage of a $10,000 investment
Class R6	$47	0.94%^{Footnote Reference1}

Footnote	Description
Footnote¹	Annualized

Expenses Paid, Amount

$ 47

Expense Ratio, Percent

0.94%

^[56]

AssetsNet

$ 45,200,437

Holdings Count | Holding

InvestmentCompanyPortfolioTurnover

34.00%

Additional Fund Statistics [Text Block]

Key Fund Statistics

Table Summary
Total Net Assets	$45,200,437
# of Portfolio Holdings	49
Portfolio Turnover Rate	34%

Holdings [Text Block]

Sector Allocation (% of total investments)

Table Summary
Value	Value
Real Estate	0.2%
Energy	0.5%
Materials	1.3%
Short-Term Investments	3.7%
Consumer Staples	4.6%
Financials	6.5%
Communication Services	8.9%
Consumer Discretionary	14.3%
Health Care	17.5%
Information Technology	18.8%
Industrials	23.7%

Largest Holdings [Text Block]

Top Ten Holdings (% of total investments)^{Footnote Referencea}

Table Summary
Cloudflare, Inc.	13.3%
Royalty Pharma PLC	8.6%
Canadian National Railway Co.	4.7%
Eurofins Scientific SE	4.7%
QXO, Inc.	4.7%
MercadoLibre, Inc.	4.6%
Spotify Technology SA	4.3%
Core & Main, Inc.	3.4%
Medline, Inc.	3.2%
Madison Air Solutions Corp.	3.0%
Total	54.5%

Footnote	Description
Footnote^a	Excluding cash equivalents.

Updated Prospectus Web Address

C000129961

Shareholder Report [Line Items]

Fund Name

Morgan Stanley Institutional Fund, Inc. - Global Stars Portfolio

Class Name

Class A

Trading Symbol

MGQAX

Annual or Semi-Annual Statement [Text Block]

This semi-annual shareholder report contains important information about Morgan Stanley Institutional Fund, Inc. - Global Stars Portfolio for the period of January 1, 2026 to June 30, 2026.

Additional Information [Text Block]

You can find additional information about the Fund at www.morganstanley.com/im/shareholderreports. You can also request this information by contacting us at 1-800-869-6397.

Additional Information Phone Number

1-800-869-6397

Additional Information Website

Expenses [Text Block]

What were the Fund costs for the last six months?

(based on a hypothetical $10,000 investment)

Table Summary
Class Name	Costs of a $10,000 investment	Costs paid as a percentage of a $10,000 investment
Class A	$57	1.17%^{Footnote Reference1}

Footnote	Description
Footnote¹	Annualized

Expenses Paid, Amount

$ 57

Expense Ratio, Percent

1.17%

^[57]

AssetsNet

$ 21,758,414

Holdings Count | Holding

InvestmentCompanyPortfolioTurnover

46.00%

Additional Fund Statistics [Text Block]

Key Fund Statistics

Table Summary
Total Net Assets	$21,758,414
# of Portfolio Holdings	39
Portfolio Turnover Rate	46%

Holdings [Text Block]

Sector Allocation (% of total investments)

Table Summary
Value	Value
Short-Term Investments	1.3%
Health Care	1.7%
Consumer Staples	7.5%
Financials	9.2%
Communication Services	11.0%
Consumer Discretionary	12.1%
Industrials	21.2%
Information Technology	36.0%

Largest Holdings [Text Block]

Top Ten Holdings (% of total investments)^{Footnote Referencea}

Table Summary
Taiwan Semiconductor Manufacturing Co. Ltd.	7.3%
NAURA Technology Group Co. Ltd.	5.3%
Alphabet, Inc.	4.9%
ASML Holding NV	4.2%
Broadcom, Inc.	3.8%
Amazon.com, Inc.	3.8%
Microsoft Corp.	3.7%
Diploma PLC	3.7%
Visa, Inc.	3.4%
Monster Beverage Corp.	3.3%
Total	43.4%

Footnote	Description
Footnote^a	Excluding cash equivalents.

Updated Prospectus Web Address

C000155911

Shareholder Report [Line Items]

Fund Name

Morgan Stanley Institutional Fund, Inc. - Global Stars Portfolio

Class Name

Class C

Trading Symbol

MSGQX

Annual or Semi-Annual Statement [Text Block]

This semi-annual shareholder report contains important information about Morgan Stanley Institutional Fund, Inc. - Global Stars Portfolio for the period of January 1, 2026 to June 30, 2026.

Additional Information [Text Block]

You can find additional information about the Fund at www.morganstanley.com/im/shareholderreports. You can also request this information by contacting us at 1-800-869-6397.

Additional Information Phone Number

1-800-869-6397

Additional Information Website

Expenses [Text Block]

What were the Fund costs for the last six months?

(based on a hypothetical $10,000 investment)

Table Summary
Class Name	Costs of a $10,000 investment	Costs paid as a percentage of a $10,000 investment
Class C	$93	1.92%^{Footnote Reference1}

Footnote	Description
Footnote¹	Annualized

Expenses Paid, Amount

$ 93

Expense Ratio, Percent

1.92%

^[58]

AssetsNet

$ 21,758,414

Holdings Count | Holding

InvestmentCompanyPortfolioTurnover

46.00%

Additional Fund Statistics [Text Block]

Key Fund Statistics

Table Summary
Total Net Assets	$21,758,414
# of Portfolio Holdings	39
Portfolio Turnover Rate	46%

Holdings [Text Block]

Sector Allocation (% of total investments)

Table Summary
Value	Value
Short-Term Investments	1.3%
Health Care	1.7%
Consumer Staples	7.5%
Financials	9.2%
Communication Services	11.0%
Consumer Discretionary	12.1%
Industrials	21.2%
Information Technology	36.0%

Largest Holdings [Text Block]

Top Ten Holdings (% of total investments)^{Footnote Referencea}

Table Summary
Taiwan Semiconductor Manufacturing Co. Ltd.	7.3%
NAURA Technology Group Co. Ltd.	5.3%
Alphabet, Inc.	4.9%
ASML Holding NV	4.2%
Broadcom, Inc.	3.8%
Amazon.com, Inc.	3.8%
Microsoft Corp.	3.7%
Diploma PLC	3.7%
Visa, Inc.	3.4%
Monster Beverage Corp.	3.3%
Total	43.4%

Footnote	Description
Footnote^a	Excluding cash equivalents.

Updated Prospectus Web Address

C000129960

Shareholder Report [Line Items]

Fund Name

Morgan Stanley Institutional Fund, Inc. - Global Stars Portfolio

Class Name

Class I

Trading Symbol

MGQIX

Annual or Semi-Annual Statement [Text Block]

This semi-annual shareholder report contains important information about Morgan Stanley Institutional Fund, Inc. - Global Stars Portfolio for the period of January 1, 2026 to June 30, 2026.

Additional Information [Text Block]

You can find additional information about the Fund at www.morganstanley.com/im/shareholderreports. You can also request this information by contacting us at 1-800-869-6397.

Additional Information Phone Number

1-800-869-6397

Additional Information Website

Expenses [Text Block]

What were the Fund costs for the last six months?

(based on a hypothetical $10,000 investment)

Table Summary
Class Name	Costs of a $10,000 investment	Costs paid as a percentage of a $10,000 investment
Class I	$40	0.82%^{Footnote Reference1}

Footnote	Description
Footnote¹	Annualized

Expenses Paid, Amount

$ 40

Expense Ratio, Percent

0.82%

^[59]

AssetsNet

$ 21,758,414

Holdings Count | Holding

InvestmentCompanyPortfolioTurnover

46.00%

Additional Fund Statistics [Text Block]

Key Fund Statistics

Table Summary
Total Net Assets	$21,758,414
# of Portfolio Holdings	39
Portfolio Turnover Rate	46%

Holdings [Text Block]

Sector Allocation (% of total investments)

Table Summary
Value	Value
Short-Term Investments	1.3%
Health Care	1.7%
Consumer Staples	7.5%
Financials	9.2%
Communication Services	11.0%
Consumer Discretionary	12.1%
Industrials	21.2%
Information Technology	36.0%

Largest Holdings [Text Block]

Top Ten Holdings (% of total investments)^{Footnote Referencea}

Table Summary
Taiwan Semiconductor Manufacturing Co. Ltd.	7.3%
NAURA Technology Group Co. Ltd.	5.3%
Alphabet, Inc.	4.9%
ASML Holding NV	4.2%
Broadcom, Inc.	3.8%
Amazon.com, Inc.	3.8%
Microsoft Corp.	3.7%
Diploma PLC	3.7%
Visa, Inc.	3.4%
Monster Beverage Corp.	3.3%
Total	43.4%

Footnote	Description
Footnote^a	Excluding cash equivalents.

Updated Prospectus Web Address

C000129962

Shareholder Report [Line Items]

Fund Name

Morgan Stanley Institutional Fund, Inc. - Global Stars Portfolio

Class Name

Class L

Trading Symbol

MGQLX

Annual or Semi-Annual Statement [Text Block]

This semi-annual shareholder report contains important information about Morgan Stanley Institutional Fund, Inc. - Global Stars Portfolio for the period of January 1, 2026 to June 30, 2026.

Additional Information [Text Block]

You can find additional information about the Fund at www.morganstanley.com/im/shareholderreports. You can also request this information by contacting us at 1-800-869-6397.

Additional Information Phone Number

1-800-869-6397

Additional Information Website

Expenses [Text Block]

What were the Fund costs for the last six months?

(based on a hypothetical $10,000 investment)

Table Summary
Class Name	Costs of a $10,000 investment	Costs paid as a percentage of a $10,000 investment
Class L	$81	1.67%^{Footnote Reference1}

Footnote	Description
Footnote¹	Annualized

Expenses Paid, Amount

$ 81

Expense Ratio, Percent

1.67%

^[60]

AssetsNet

$ 21,758,414

Holdings Count | Holding

InvestmentCompanyPortfolioTurnover

46.00%

Additional Fund Statistics [Text Block]

Key Fund Statistics

Table Summary
Total Net Assets	$21,758,414
# of Portfolio Holdings	39
Portfolio Turnover Rate	46%

Holdings [Text Block]

Sector Allocation (% of total investments)

Table Summary
Value	Value
Short-Term Investments	1.3%
Health Care	1.7%
Consumer Staples	7.5%
Financials	9.2%
Communication Services	11.0%
Consumer Discretionary	12.1%
Industrials	21.2%
Information Technology	36.0%

Largest Holdings [Text Block]

Top Ten Holdings (% of total investments)^{Footnote Referencea}

Table Summary
Taiwan Semiconductor Manufacturing Co. Ltd.	7.3%
NAURA Technology Group Co. Ltd.	5.3%
Alphabet, Inc.	4.9%
ASML Holding NV	4.2%
Broadcom, Inc.	3.8%
Amazon.com, Inc.	3.8%
Microsoft Corp.	3.7%
Diploma PLC	3.7%
Visa, Inc.	3.4%
Monster Beverage Corp.	3.3%
Total	43.4%

Footnote	Description
Footnote^a	Excluding cash equivalents.

Updated Prospectus Web Address

C000129963

Shareholder Report [Line Items]

Fund Name

Morgan Stanley Institutional Fund, Inc. - Global Stars Portfolio

Class Name

Class R6

Trading Symbol

MGQSX

Annual or Semi-Annual Statement [Text Block]

This semi-annual shareholder report contains important information about Morgan Stanley Institutional Fund, Inc. - Global Stars Portfolio for the period of January 1, 2026 to June 30, 2026.

Additional Information [Text Block]

You can find additional information about the Fund at www.morganstanley.com/im/shareholderreports. You can also request this information by contacting us at 1-800-869-6397.

Additional Information Phone Number

1-800-869-6397

Additional Information Website

Expenses [Text Block]

What were the Fund costs for the last six months?

(based on a hypothetical $10,000 investment)

Table Summary
Class Name	Costs of a $10,000 investment	Costs paid as a percentage of a $10,000 investment
Class R6	$38	0.78%^{Footnote Reference1}

Footnote	Description
Footnote¹	Annualized

Expenses Paid, Amount

$ 38

Expense Ratio, Percent

0.78%

^[61]

AssetsNet

$ 21,758,414

Holdings Count | Holding

InvestmentCompanyPortfolioTurnover

46.00%

Additional Fund Statistics [Text Block]

Key Fund Statistics

Table Summary
Total Net Assets	$21,758,414
# of Portfolio Holdings	39
Portfolio Turnover Rate	46%

Holdings [Text Block]

Sector Allocation (% of total investments)

Table Summary
Value	Value
Short-Term Investments	1.3%
Health Care	1.7%
Consumer Staples	7.5%
Financials	9.2%
Communication Services	11.0%
Consumer Discretionary	12.1%
Industrials	21.2%
Information Technology	36.0%

Largest Holdings [Text Block]

Top Ten Holdings (% of total investments)^{Footnote Referencea}

Table Summary
Taiwan Semiconductor Manufacturing Co. Ltd.	7.3%
NAURA Technology Group Co. Ltd.	5.3%
Alphabet, Inc.	4.9%
ASML Holding NV	4.2%
Broadcom, Inc.	3.8%
Amazon.com, Inc.	3.8%
Microsoft Corp.	3.7%
Diploma PLC	3.7%
Visa, Inc.	3.4%
Monster Beverage Corp.	3.3%
Total	43.4%

Footnote	Description
Footnote^a	Excluding cash equivalents.

Updated Prospectus Web Address

C000007751

Shareholder Report [Line Items]

Fund Name

Morgan Stanley Institutional Fund, Inc. - Growth Portfolio

Class Name

Class A

Trading Symbol

MSEGX

Annual or Semi-Annual Statement [Text Block]

This semi-annual shareholder report contains important information about Morgan Stanley Institutional Fund, Inc. - Growth Portfolio for the period of January 1, 2026 to June 30, 2026.

Additional Information [Text Block]

You can find additional information about the Fund at www.morganstanley.com/im/shareholderreports. You can also request this information by contacting us at 1-800-869-6397.

Additional Information Phone Number

1-800-869-6397

Additional Information Website

Expenses [Text Block]

What were the Fund costs for the last six months?

(based on a hypothetical $10,000 investment)

Table Summary
Class Name	Costs of a $10,000 investment	Costs paid as a percentage of a $10,000 investment
Class A	$45	0.91%^{Footnote Reference1}

Footnote	Description
Footnote¹	Annualized

Expenses Paid, Amount

$ 45

Expense Ratio, Percent

0.91%

^[62]

AssetsNet

$ 3,589,221,460

Holdings Count | Holding

InvestmentCompanyPortfolioTurnover

18.00%

Additional Fund Statistics [Text Block]

Key Fund Statistics

Table Summary
Total Net Assets	$3,589,221,460
# of Portfolio Holdings	31
Portfolio Turnover Rate	18%

Holdings [Text Block]

Sector Allocation (% of total investments)

Table Summary
Value	Value
Consumer Staples	0.4%
Real Estate	0.6%
Short-Term Investments	1.6%
Industrials	4.6%
Communication Services	8.6%
Financials	10.5%
Consumer Discretionary	14.9%
Health Care	15.8%
Information Technology	43.0%

Largest Holdings [Text Block]

Top Ten Holdings (% of total investments)^{Footnote Referencea}

Table Summary
Cloudflare, Inc.	13.4%
Tesla, Inc.	9.2%
Royalty Pharma PLC	7.6%
Affirm Holdings, Inc.	7.0%
AppLovin Corp.	6.2%
Roivant Sciences Ltd.	5.2%
Aurora Innovation, Inc.	4.9%
Space Exploration Technologies Corp.	4.8%
DoorDash, Inc.	4.7%
QXO, Inc.	4.5%
Total	67.5%

Footnote	Description
Footnote^a	Excluding cash equivalents.

Updated Prospectus Web Address

C000155892

Shareholder Report [Line Items]

Fund Name

Morgan Stanley Institutional Fund, Inc. - Growth Portfolio

Class Name

Class C

Trading Symbol

MSGUX

Annual or Semi-Annual Statement [Text Block]

This semi-annual shareholder report contains important information about Morgan Stanley Institutional Fund, Inc. - Growth Portfolio for the period of January 1, 2026 to June 30, 2026.

Additional Information [Text Block]

You can find additional information about the Fund at www.morganstanley.com/im/shareholderreports. You can also request this information by contacting us at 1-800-869-6397.

Additional Information Phone Number

1-800-869-6397

Additional Information Website

Expenses [Text Block]

What were the Fund costs for the last six months?

(based on a hypothetical $10,000 investment)

Table Summary
Class Name	Costs of a $10,000 investment	Costs paid as a percentage of a $10,000 investment
Class C	$81	1.66%^{Footnote Reference1}

Footnote	Description
Footnote¹	Annualized

Expenses Paid, Amount

$ 81

Expense Ratio, Percent

1.66%

^[63]

AssetsNet

$ 3,589,221,460

Holdings Count | Holding

InvestmentCompanyPortfolioTurnover

18.00%

Additional Fund Statistics [Text Block]

Key Fund Statistics

Table Summary
Total Net Assets	$3,589,221,460
# of Portfolio Holdings	31
Portfolio Turnover Rate	18%

Holdings [Text Block]

Sector Allocation (% of total investments)

Table Summary
Value	Value
Consumer Staples	0.4%
Real Estate	0.6%
Short-Term Investments	1.6%
Industrials	4.6%
Communication Services	8.6%
Financials	10.5%
Consumer Discretionary	14.9%
Health Care	15.8%
Information Technology	43.0%

Largest Holdings [Text Block]

Top Ten Holdings (% of total investments)^{Footnote Referencea}

Table Summary
Cloudflare, Inc.	13.4%
Tesla, Inc.	9.2%
Royalty Pharma PLC	7.6%
Affirm Holdings, Inc.	7.0%
AppLovin Corp.	6.2%
Roivant Sciences Ltd.	5.2%
Aurora Innovation, Inc.	4.9%
Space Exploration Technologies Corp.	4.8%
DoorDash, Inc.	4.7%
QXO, Inc.	4.5%
Total	67.5%

Footnote	Description
Footnote^a	Excluding cash equivalents.

Updated Prospectus Web Address

C000007750

Shareholder Report [Line Items]

Fund Name

Morgan Stanley Institutional Fund, Inc. - Growth Portfolio

Class Name

Class I

Trading Symbol

MSEQX

Annual or Semi-Annual Statement [Text Block]

This semi-annual shareholder report contains important information about Morgan Stanley Institutional Fund, Inc. - Growth Portfolio for the period of January 1, 2026 to June 30, 2026.

Additional Information [Text Block]

You can find additional information about the Fund at www.morganstanley.com/im/shareholderreports. You can also request this information by contacting us at 1-800-869-6397.

Additional Information Phone Number

1-800-869-6397

Additional Information Website

Expenses [Text Block]

What were the Fund costs for the last six months?

(based on a hypothetical $10,000 investment)

Table Summary
Class Name	Costs of a $10,000 investment	Costs paid as a percentage of a $10,000 investment
Class I	$32	0.65%^{Footnote Reference1}

Footnote	Description
Footnote¹	Annualized

Expenses Paid, Amount

$ 32

Expense Ratio, Percent

0.65%

^[64]

AssetsNet

$ 3,589,221,460

Holdings Count | Holding

InvestmentCompanyPortfolioTurnover

18.00%

Additional Fund Statistics [Text Block]

Key Fund Statistics

Table Summary
Total Net Assets	$3,589,221,460
# of Portfolio Holdings	31
Portfolio Turnover Rate	18%

Holdings [Text Block]

Sector Allocation (% of total investments)

Table Summary
Value	Value
Consumer Staples	0.4%
Real Estate	0.6%
Short-Term Investments	1.6%
Industrials	4.6%
Communication Services	8.6%
Financials	10.5%
Consumer Discretionary	14.9%
Health Care	15.8%
Information Technology	43.0%

Largest Holdings [Text Block]

Top Ten Holdings (% of total investments)^{Footnote Referencea}

Table Summary
Cloudflare, Inc.	13.4%
Tesla, Inc.	9.2%
Royalty Pharma PLC	7.6%
Affirm Holdings, Inc.	7.0%
AppLovin Corp.	6.2%
Roivant Sciences Ltd.	5.2%
Aurora Innovation, Inc.	4.9%
Space Exploration Technologies Corp.	4.8%
DoorDash, Inc.	4.7%
QXO, Inc.	4.5%
Total	67.5%

Footnote	Description
Footnote^a	Excluding cash equivalents.

Updated Prospectus Web Address

C000198816

Shareholder Report [Line Items]

Fund Name

Morgan Stanley Institutional Fund, Inc. - Growth Portfolio

Class Name

Class IR

Trading Symbol

MGHRX

Annual or Semi-Annual Statement [Text Block]

This semi-annual shareholder report contains important information about Morgan Stanley Institutional Fund, Inc. - Growth Portfolio for the period of January 1, 2026 to June 30, 2026.

Additional Information [Text Block]

You can find additional information about the Fund at www.morganstanley.com/im/shareholderreports. You can also request this information by contacting us at 1-800-869-6397.

Additional Information Phone Number

1-800-869-6397

Additional Information Website

Expenses [Text Block]

What were the Fund costs for the last six months?

(based on a hypothetical $10,000 investment)

Table Summary
Class Name	Costs of a $10,000 investment	Costs paid as a percentage of a $10,000 investment
Class IR	$26	0.54%^{Footnote Reference1}

Footnote	Description
Footnote¹	Annualized

Expenses Paid, Amount

$ 26

Expense Ratio, Percent

0.54%

^[65]

AssetsNet

$ 3,589,221,460

Holdings Count | Holding

InvestmentCompanyPortfolioTurnover

18.00%

Additional Fund Statistics [Text Block]

Key Fund Statistics

Table Summary
Total Net Assets	$3,589,221,460
# of Portfolio Holdings	31
Portfolio Turnover Rate	18%

Holdings [Text Block]

Sector Allocation (% of total investments)

Table Summary
Value	Value
Consumer Staples	0.4%
Real Estate	0.6%
Short-Term Investments	1.6%
Industrials	4.6%
Communication Services	8.6%
Financials	10.5%
Consumer Discretionary	14.9%
Health Care	15.8%
Information Technology	43.0%

Largest Holdings [Text Block]

Top Ten Holdings (% of total investments)^{Footnote Referencea}

Table Summary
Cloudflare, Inc.	13.4%
Tesla, Inc.	9.2%
Royalty Pharma PLC	7.6%
Affirm Holdings, Inc.	7.0%
AppLovin Corp.	6.2%
Roivant Sciences Ltd.	5.2%
Aurora Innovation, Inc.	4.9%
Space Exploration Technologies Corp.	4.8%
DoorDash, Inc.	4.7%
QXO, Inc.	4.5%
Total	67.5%

Footnote	Description
Footnote^a	Excluding cash equivalents.

Updated Prospectus Web Address

C000113805

Shareholder Report [Line Items]

Fund Name

Morgan Stanley Institutional Fund, Inc. - Growth Portfolio

Class Name

Class L

Trading Symbol

MSHLX

Annual or Semi-Annual Statement [Text Block]

This semi-annual shareholder report contains important information about Morgan Stanley Institutional Fund, Inc. - Growth Portfolio for the period of January 1, 2026 to June 30, 2026.

Additional Information [Text Block]

You can find additional information about the Fund at www.morganstanley.com/im/shareholderreports. You can also request this information by contacting us at 1-800-869-6397.

Additional Information Phone Number

1-800-869-6397

Additional Information Website

Expenses [Text Block]

What were the Fund costs for the last six months?

(based on a hypothetical $10,000 investment)

Table Summary
Class Name	Costs of a $10,000 investment	Costs paid as a percentage of a $10,000 investment
Class L	$68	1.40%^{Footnote Reference1}

Footnote	Description
Footnote¹	Annualized

Expenses Paid, Amount

$ 68

Expense Ratio, Percent

1.40%

^[66]

AssetsNet

$ 3,589,221,460

Holdings Count | Holding

InvestmentCompanyPortfolioTurnover

18.00%

Additional Fund Statistics [Text Block]

Key Fund Statistics

Table Summary
Total Net Assets	$3,589,221,460
# of Portfolio Holdings	31
Portfolio Turnover Rate	18%

Holdings [Text Block]

Sector Allocation (% of total investments)

Table Summary
Value	Value
Consumer Staples	0.4%
Real Estate	0.6%
Short-Term Investments	1.6%
Industrials	4.6%
Communication Services	8.6%
Financials	10.5%
Consumer Discretionary	14.9%
Health Care	15.8%
Information Technology	43.0%

Largest Holdings [Text Block]

Top Ten Holdings (% of total investments)^{Footnote Referencea}

Table Summary
Cloudflare, Inc.	13.4%
Tesla, Inc.	9.2%
Royalty Pharma PLC	7.6%
Affirm Holdings, Inc.	7.0%
AppLovin Corp.	6.2%
Roivant Sciences Ltd.	5.2%
Aurora Innovation, Inc.	4.9%
Space Exploration Technologies Corp.	4.8%
DoorDash, Inc.	4.7%
QXO, Inc.	4.5%
Total	67.5%

Footnote	Description
Footnote^a	Excluding cash equivalents.

Updated Prospectus Web Address

C000126914

Shareholder Report [Line Items]

Fund Name

Morgan Stanley Institutional Fund, Inc. - Growth Portfolio

Class Name

Class R6

Trading Symbol

MGRPX

Annual or Semi-Annual Statement [Text Block]

This semi-annual shareholder report contains important information about Morgan Stanley Institutional Fund, Inc. - Growth Portfolio for the period of January 1, 2026 to June 30, 2026.

Additional Information [Text Block]

You can find additional information about the Fund at www.morganstanley.com/im/shareholderreports. You can also request this information by contacting us at 1-800-869-6397.

Additional Information Phone Number

1-800-869-6397

Additional Information Website

Expenses [Text Block]

What were the Fund costs for the last six months?

(based on a hypothetical $10,000 investment)

Table Summary
Class Name	Costs of a $10,000 investment	Costs paid as a percentage of a $10,000 investment
Class R6	$26	0.54%^{Footnote Reference1}

Footnote	Description
Footnote¹	Annualized

Expenses Paid, Amount

$ 26

Expense Ratio, Percent

0.54%

^[67]

AssetsNet

$ 3,589,221,460

Holdings Count | Holding

InvestmentCompanyPortfolioTurnover

18.00%

Additional Fund Statistics [Text Block]

Key Fund Statistics

Table Summary
Total Net Assets	$3,589,221,460
# of Portfolio Holdings	31
Portfolio Turnover Rate	18%

Holdings [Text Block]

Sector Allocation (% of total investments)

Table Summary
Value	Value
Consumer Staples	0.4%
Real Estate	0.6%
Short-Term Investments	1.6%
Industrials	4.6%
Communication Services	8.6%
Financials	10.5%
Consumer Discretionary	14.9%
Health Care	15.8%
Information Technology	43.0%

Largest Holdings [Text Block]

Top Ten Holdings (% of total investments)^{Footnote Referencea}

Table Summary
Cloudflare, Inc.	13.4%
Tesla, Inc.	9.2%
Royalty Pharma PLC	7.6%
Affirm Holdings, Inc.	7.0%
AppLovin Corp.	6.2%
Roivant Sciences Ltd.	5.2%
Aurora Innovation, Inc.	4.9%
Space Exploration Technologies Corp.	4.8%
DoorDash, Inc.	4.7%
QXO, Inc.	4.5%
Total	67.5%

Footnote	Description
Footnote^a	Excluding cash equivalents.

Updated Prospectus Web Address

C000007745

Shareholder Report [Line Items]

Fund Name

Morgan Stanley Institutional Fund, Inc. - Inception Portfolio

Class Name

Class A

Trading Symbol

MSSMX

Annual or Semi-Annual Statement [Text Block]

This semi-annual shareholder report contains important information about Morgan Stanley Institutional Fund, Inc. - Inception Portfolio for the period of January 1, 2026 to June 30, 2026.

Additional Information [Text Block]

You can find additional information about the Fund at www.morganstanley.com/im/shareholderreports. You can also request this information by contacting us at 1-800-869-6397.

Additional Information Phone Number

1-800-869-6397

Additional Information Website

Expenses [Text Block]

What were the Fund costs for the last six months?

(based on a hypothetical $10,000 investment)

Table Summary
Class Name	Costs of a $10,000 investment	Costs paid as a percentage of a $10,000 investment
Class A	$69	1.35%^{Footnote Reference1}

Footnote	Description
Footnote¹	Annualized

Expenses Paid, Amount

$ 69

Expense Ratio, Percent

1.35%

^[68]

AssetsNet

$ 281,798,073

Holdings Count | Holding

InvestmentCompanyPortfolioTurnover

48.00%

Additional Fund Statistics [Text Block]

Key Fund Statistics

Table Summary
Total Net Assets	$281,798,073
# of Portfolio Holdings	61
Portfolio Turnover Rate	48%

Holdings [Text Block]

Sector Allocation (% of total investments)

Table Summary
Value	Value
Energy	1.1%
Short-Term Investments	4.4%
Financials	4.8%
Industrials	4.9%
Consumer Staples	5.8%
Consumer Discretionary	5.9%
Real Estate	8.3%
Information Technology	25.6%
Health Care	39.2%

Largest Holdings [Text Block]

Top Ten Holdings (% of total investments)^{Footnote Referencea}

Table Summary
Agilon health, Inc.	8.8%
Cloudflare, Inc.	8.6%
Opendoor Technologies, Inc.	7.1%
Aurora Innovation, Inc.	6.4%
IonQ, Inc.	5.7%
X4 Pharmaceuticals, Inc.	3.7%
HealthEquity, Inc.	3.5%
Celsius Holdings, Inc.	3.4%
Immunovant, Inc.	3.3%
GRAIL, Inc.	3.1%
Total	53.6%

Footnote	Description
Footnote^a	Excluding cash equivalents.

Updated Prospectus Web Address

C000155889

Shareholder Report [Line Items]

Fund Name

Morgan Stanley Institutional Fund, Inc. - Inception Portfolio

Class Name

Class C

Trading Symbol

MSCOX

Annual or Semi-Annual Statement [Text Block]

This semi-annual shareholder report contains important information about Morgan Stanley Institutional Fund, Inc. - Inception Portfolio for the period of January 1, 2026 to June 30, 2026.

Additional Information [Text Block]

You can find additional information about the Fund at www.morganstanley.com/im/shareholderreports. You can also request this information by contacting us at 1-800-869-6397.

Additional Information Phone Number

1-800-869-6397

Additional Information Website

Expenses [Text Block]

What were the Fund costs for the last six months?

(based on a hypothetical $10,000 investment)

Table Summary
Class Name	Costs of a $10,000 investment	Costs paid as a percentage of a $10,000 investment
Class C	$107	2.10%^{Footnote Reference1}

Footnote	Description
Footnote¹	Annualized

Expenses Paid, Amount

$ 107

Expense Ratio, Percent

2.10%

^[69]

AssetsNet

$ 281,798,073

Holdings Count | Holding

InvestmentCompanyPortfolioTurnover

48.00%

Additional Fund Statistics [Text Block]

Key Fund Statistics

Table Summary
Total Net Assets	$281,798,073
# of Portfolio Holdings	61
Portfolio Turnover Rate	48%

Holdings [Text Block]

Sector Allocation (% of total investments)

Table Summary
Value	Value
Energy	1.1%
Short-Term Investments	4.4%
Financials	4.8%
Industrials	4.9%
Consumer Staples	5.8%
Consumer Discretionary	5.9%
Real Estate	8.3%
Information Technology	25.6%
Health Care	39.2%

Largest Holdings [Text Block]

Top Ten Holdings (% of total investments)^{Footnote Referencea}

Table Summary
Agilon health, Inc.	8.8%
Cloudflare, Inc.	8.6%
Opendoor Technologies, Inc.	7.1%
Aurora Innovation, Inc.	6.4%
IonQ, Inc.	5.7%
X4 Pharmaceuticals, Inc.	3.7%
HealthEquity, Inc.	3.5%
Celsius Holdings, Inc.	3.4%
Immunovant, Inc.	3.3%
GRAIL, Inc.	3.1%
Total	53.6%

Footnote	Description
Footnote^a	Excluding cash equivalents.

Updated Prospectus Web Address

C000007744

Shareholder Report [Line Items]

Fund Name

Morgan Stanley Institutional Fund, Inc. - Inception Portfolio

Class Name

Class I

Trading Symbol

MSSGX

Annual or Semi-Annual Statement [Text Block]

This semi-annual shareholder report contains important information about Morgan Stanley Institutional Fund, Inc. - Inception Portfolio for the period of January 1, 2026 to June 30, 2026.

Additional Information [Text Block]

You can find additional information about the Fund at www.morganstanley.com/im/shareholderreports. You can also request this information by contacting us at 1-800-869-6397.

Additional Information Phone Number

1-800-869-6397

Additional Information Website

Expenses [Text Block]

What were the Fund costs for the last six months?

(based on a hypothetical $10,000 investment)

Table Summary
Class Name	Costs of a $10,000 investment	Costs paid as a percentage of a $10,000 investment
Class I	$51	1.00%^{Footnote Reference1}

Footnote	Description
Footnote¹	Annualized

Expenses Paid, Amount

$ 51

Expense Ratio, Percent

1.00%

^[70]

AssetsNet

$ 281,798,073

Holdings Count | Holding

InvestmentCompanyPortfolioTurnover

48.00%

Additional Fund Statistics [Text Block]

Key Fund Statistics

Table Summary
Total Net Assets	$281,798,073
# of Portfolio Holdings	61
Portfolio Turnover Rate	48%

Holdings [Text Block]

Sector Allocation (% of total investments)

Table Summary
Value	Value
Energy	1.1%
Short-Term Investments	4.4%
Financials	4.8%
Industrials	4.9%
Consumer Staples	5.8%
Consumer Discretionary	5.9%
Real Estate	8.3%
Information Technology	25.6%
Health Care	39.2%

Largest Holdings [Text Block]

Top Ten Holdings (% of total investments)^{Footnote Referencea}

Table Summary
Agilon health, Inc.	8.8%
Cloudflare, Inc.	8.6%
Opendoor Technologies, Inc.	7.1%
Aurora Innovation, Inc.	6.4%
IonQ, Inc.	5.7%
X4 Pharmaceuticals, Inc.	3.7%
HealthEquity, Inc.	3.5%
Celsius Holdings, Inc.	3.4%
Immunovant, Inc.	3.3%
GRAIL, Inc.	3.1%
Total	53.6%

Footnote	Description
Footnote^a	Excluding cash equivalents.

Updated Prospectus Web Address

C000104303

Shareholder Report [Line Items]

Fund Name

Morgan Stanley Institutional Fund, Inc. - Inception Portfolio

Class Name

Class L

Trading Symbol

MSSLX

Annual or Semi-Annual Statement [Text Block]

This semi-annual shareholder report contains important information about Morgan Stanley Institutional Fund, Inc. - Inception Portfolio for the period of January 1, 2026 to June 30, 2026.

Additional Information [Text Block]

You can find additional information about the Fund at www.morganstanley.com/im/shareholderreports. You can also request this information by contacting us at 1-800-869-6397.

Additional Information Phone Number

1-800-869-6397

Additional Information Website

Expenses [Text Block]

What were the Fund costs for the last six months?

(based on a hypothetical $10,000 investment)

Table Summary
Class Name	Costs of a $10,000 investment	Costs paid as a percentage of a $10,000 investment
Class L	$95	1.85%^{Footnote Reference1}

Footnote	Description
Footnote¹	Annualized

Expenses Paid, Amount

$ 95

Expense Ratio, Percent

1.85%

^[71]

AssetsNet

$ 281,798,073

Holdings Count | Holding

InvestmentCompanyPortfolioTurnover

48.00%

Additional Fund Statistics [Text Block]

Key Fund Statistics

Table Summary
Total Net Assets	$281,798,073
# of Portfolio Holdings	61
Portfolio Turnover Rate	48%

Holdings [Text Block]

Sector Allocation (% of total investments)

Table Summary
Value	Value
Energy	1.1%
Short-Term Investments	4.4%
Financials	4.8%
Industrials	4.9%
Consumer Staples	5.8%
Consumer Discretionary	5.9%
Real Estate	8.3%
Information Technology	25.6%
Health Care	39.2%

Largest Holdings [Text Block]

Top Ten Holdings (% of total investments)^{Footnote Referencea}

Table Summary
Agilon health, Inc.	8.8%
Cloudflare, Inc.	8.6%
Opendoor Technologies, Inc.	7.1%
Aurora Innovation, Inc.	6.4%
IonQ, Inc.	5.7%
X4 Pharmaceuticals, Inc.	3.7%
HealthEquity, Inc.	3.5%
Celsius Holdings, Inc.	3.4%
Immunovant, Inc.	3.3%
GRAIL, Inc.	3.1%
Total	53.6%

Footnote	Description
Footnote^a	Excluding cash equivalents.

Updated Prospectus Web Address

C000129402

Shareholder Report [Line Items]

Fund Name

Morgan Stanley Institutional Fund, Inc. - Inception Portfolio

Class Name

Class R6

Trading Symbol

MFLLX

Annual or Semi-Annual Statement [Text Block]

This semi-annual shareholder report contains important information about Morgan Stanley Institutional Fund, Inc. - Inception Portfolio for the period of January 1, 2026 to June 30, 2026.

Additional Information [Text Block]

You can find additional information about the Fund at www.morganstanley.com/im/shareholderreports. You can also request this information by contacting us at 1-800-869-6397.

Additional Information Phone Number

1-800-869-6397

Additional Information Website

Expenses [Text Block]

What were the Fund costs for the last six months?

(based on a hypothetical $10,000 investment)

Table Summary
Class Name	Costs of a $10,000 investment	Costs paid as a percentage of a $10,000 investment
Class R6	$48	0.93%^{Footnote Reference1}

Footnote	Description
Footnote¹	Annualized

Expenses Paid, Amount

$ 48

Expense Ratio, Percent

0.93%

^[72]

AssetsNet

$ 281,798,073

Holdings Count | Holding

InvestmentCompanyPortfolioTurnover

48.00%

Additional Fund Statistics [Text Block]

Key Fund Statistics

Table Summary
Total Net Assets	$281,798,073
# of Portfolio Holdings	61
Portfolio Turnover Rate	48%

Holdings [Text Block]

Sector Allocation (% of total investments)

Table Summary
Value	Value
Energy	1.1%
Short-Term Investments	4.4%
Financials	4.8%
Industrials	4.9%
Consumer Staples	5.8%
Consumer Discretionary	5.9%
Real Estate	8.3%
Information Technology	25.6%
Health Care	39.2%

Largest Holdings [Text Block]

Top Ten Holdings (% of total investments)^{Footnote Referencea}

Table Summary
Agilon health, Inc.	8.8%
Cloudflare, Inc.	8.6%
Opendoor Technologies, Inc.	7.1%
Aurora Innovation, Inc.	6.4%
IonQ, Inc.	5.7%
X4 Pharmaceuticals, Inc.	3.7%
HealthEquity, Inc.	3.5%
Celsius Holdings, Inc.	3.4%
Immunovant, Inc.	3.3%
GRAIL, Inc.	3.1%
Total	53.6%

Footnote	Description
Footnote^a	Excluding cash equivalents.

Updated Prospectus Web Address

C000094900

Shareholder Report [Line Items]

Fund Name

Morgan Stanley Institutional Fund, Inc. - International Advantage Portfolio

Class Name

Class A

Trading Symbol

MFAPX

Annual or Semi-Annual Statement [Text Block]

This semi-annual shareholder report contains important information about Morgan Stanley Institutional Fund, Inc. - International Advantage Portfolio for the period of January 1, 2026 to June 30, 2026.

Additional Information [Text Block]

You can find additional information about the Fund at www.morganstanley.com/im/shareholderreports. You can also request this information by contacting us at 1-800-869-6397.

Additional Information Phone Number

1-800-869-6397

Additional Information Website

Expenses [Text Block]

What were the Fund costs for the last six months?

(based on a hypothetical $10,000 investment)

Table Summary
Class Name	Costs of a $10,000 investment	Costs paid as a percentage of a $10,000 investment
Class A	$65	1.30%^{Footnote Reference1}

Footnote	Description
Footnote¹	Annualized

Expenses Paid, Amount

$ 65

Expense Ratio, Percent

1.30%

^[73]

AssetsNet

$ 2,142,996,339

Holdings Count | Holding

InvestmentCompanyPortfolioTurnover

0.00%

Additional Fund Statistics [Text Block]

Key Fund Statistics

Table Summary
Total Net Assets	$2,142,996,339
# of Portfolio Holdings	35
Portfolio Turnover Rate	0%

Holdings [Text Block]

Country Allocation (% of total investments)

Table Summary
Value	Value
Other	9.0%
Sweden	5.2%
Italy	5.5%
Switzerland	5.9%
Denmark	6.3%
India	8.1%
United States	8.8%
Netherlands	9.7%
Taiwan	10.2%
Japan	10.5%
France	20.8%

Largest Holdings [Text Block]

Top Ten Holdings (% of total investments)^{Footnote Referencea}

Table Summary
Taiwan Semiconductor Manufacturing Co. Ltd.	10.2%
ASML Holding NV	8.8%
Keyence Corp.	6.6%
DSV AS	6.3%
Hermes International SCA	6.2%
Moncler SpA	5.4%
Schneider Electric SE	5.4%
Spotify Technology SA	5.2%
L'Oreal SA	4.8%
MercadoLibre, Inc.	3.3%
Total	62.2%

Footnote	Description
Footnote^a	Excluding cash equivalents.

Updated Prospectus Web Address

C000155904

Shareholder Report [Line Items]

Fund Name

Morgan Stanley Institutional Fund, Inc. - International Advantage Portfolio

Class Name

Class C

Trading Symbol

MSIAX

Annual or Semi-Annual Statement [Text Block]

Additional Information [Text Block]

You can find additional information about the Fund at www.morganstanley.com/im/shareholderreports. You can also request this information by contacting us at 1-800-869-6397.

Additional Information Phone Number

1-800-869-6397

Additional Information Website

Expenses [Text Block]

What were the Fund costs for the last six months?

(based on a hypothetical $10,000 investment)

Table Summary
Class Name	Costs of a $10,000 investment	Costs paid as a percentage of a $10,000 investment
Class C	$105	2.10%^{Footnote Reference1}

Footnote	Description
Footnote¹	Annualized

Expenses Paid, Amount

$ 105

Expense Ratio, Percent

2.10%

^[74]

AssetsNet

$ 2,142,996,339

Holdings Count | Holding

InvestmentCompanyPortfolioTurnover

0.00%

Additional Fund Statistics [Text Block]

Key Fund Statistics

Table Summary
Total Net Assets	$2,142,996,339
# of Portfolio Holdings	35
Portfolio Turnover Rate	0%

Holdings [Text Block]

Country Allocation (% of total investments)

Table Summary
Value	Value
Other	9.0%
Sweden	5.2%
Italy	5.5%
Switzerland	5.9%
Denmark	6.3%
India	8.1%
United States	8.8%
Netherlands	9.7%
Taiwan	10.2%
Japan	10.5%
France	20.8%

Largest Holdings [Text Block]

Top Ten Holdings (% of total investments)^{Footnote Referencea}

Table Summary
Taiwan Semiconductor Manufacturing Co. Ltd.	10.2%
ASML Holding NV	8.8%
Keyence Corp.	6.6%
DSV AS	6.3%
Hermes International SCA	6.2%
Moncler SpA	5.4%
Schneider Electric SE	5.4%
Spotify Technology SA	5.2%
L'Oreal SA	4.8%
MercadoLibre, Inc.	3.3%
Total	62.2%

Footnote	Description
Footnote^a	Excluding cash equivalents.

Updated Prospectus Web Address

C000094898

Shareholder Report [Line Items]

Fund Name

Morgan Stanley Institutional Fund, Inc. - International Advantage Portfolio

Class Name

Class I

Trading Symbol

MFAIX

Annual or Semi-Annual Statement [Text Block]

Additional Information [Text Block]

You can find additional information about the Fund at www.morganstanley.com/im/shareholderreports. You can also request this information by contacting us at 1-800-869-6397.

Additional Information Phone Number

1-800-869-6397

Additional Information Website

Expenses [Text Block]

What were the Fund costs for the last six months?

(based on a hypothetical $10,000 investment)

Table Summary
Class Name	Costs of a $10,000 investment	Costs paid as a percentage of a $10,000 investment
Class I	$50	1.00%^{Footnote Reference1}

Footnote	Description
Footnote¹	Annualized

Expenses Paid, Amount

$ 50

Expense Ratio, Percent

1.00%

^[75]

AssetsNet

$ 2,142,996,339

Holdings Count | Holding

InvestmentCompanyPortfolioTurnover

0.00%

Additional Fund Statistics [Text Block]

Key Fund Statistics

Table Summary
Total Net Assets	$2,142,996,339
# of Portfolio Holdings	35
Portfolio Turnover Rate	0%

Holdings [Text Block]

Country Allocation (% of total investments)

Table Summary
Value	Value
Other	9.0%
Sweden	5.2%
Italy	5.5%
Switzerland	5.9%
Denmark	6.3%
India	8.1%
United States	8.8%
Netherlands	9.7%
Taiwan	10.2%
Japan	10.5%
France	20.8%

Largest Holdings [Text Block]

Top Ten Holdings (% of total investments)^{Footnote Referencea}

Table Summary
Taiwan Semiconductor Manufacturing Co. Ltd.	10.2%
ASML Holding NV	8.8%
Keyence Corp.	6.6%
DSV AS	6.3%
Hermes International SCA	6.2%
Moncler SpA	5.4%
Schneider Electric SE	5.4%
Spotify Technology SA	5.2%
L'Oreal SA	4.8%
MercadoLibre, Inc.	3.3%
Total	62.2%

Footnote	Description
Footnote^a	Excluding cash equivalents.

Updated Prospectus Web Address

C000094899

Shareholder Report [Line Items]

Fund Name

Morgan Stanley Institutional Fund, Inc. - International Advantage Portfolio

Class Name

Class L

Trading Symbol

MSALX

Annual or Semi-Annual Statement [Text Block]

Additional Information [Text Block]

You can find additional information about the Fund at www.morganstanley.com/im/shareholderreports. You can also request this information by contacting us at 1-800-869-6397.

Additional Information Phone Number

1-800-869-6397

Additional Information Website

Expenses [Text Block]

What were the Fund costs for the last six months?

(based on a hypothetical $10,000 investment)

Table Summary
Class Name	Costs of a $10,000 investment	Costs paid as a percentage of a $10,000 investment
Class L	$93	1.85%^{Footnote Reference1}

Footnote	Description
Footnote¹	Annualized

Expenses Paid, Amount

$ 93

Expense Ratio, Percent

1.85%

^[76]

AssetsNet

$ 2,142,996,339

Holdings Count | Holding

InvestmentCompanyPortfolioTurnover

0.00%

Additional Fund Statistics [Text Block]

Key Fund Statistics

Table Summary
Total Net Assets	$2,142,996,339
# of Portfolio Holdings	35
Portfolio Turnover Rate	0%

Holdings [Text Block]

Country Allocation (% of total investments)

Table Summary
Value	Value
Other	9.0%
Sweden	5.2%
Italy	5.5%
Switzerland	5.9%
Denmark	6.3%
India	8.1%
United States	8.8%
Netherlands	9.7%
Taiwan	10.2%
Japan	10.5%
France	20.8%

Largest Holdings [Text Block]

Top Ten Holdings (% of total investments)^{Footnote Referencea}

Table Summary
Taiwan Semiconductor Manufacturing Co. Ltd.	10.2%
ASML Holding NV	8.8%
Keyence Corp.	6.6%
DSV AS	6.3%
Hermes International SCA	6.2%
Moncler SpA	5.4%
Schneider Electric SE	5.4%
Spotify Technology SA	5.2%
L'Oreal SA	4.8%
MercadoLibre, Inc.	3.3%
Total	62.2%

Footnote	Description
Footnote^a	Excluding cash equivalents.

Updated Prospectus Web Address

C000198826

Shareholder Report [Line Items]

Fund Name

Morgan Stanley Institutional Fund, Inc. - International Advantage Portfolio

Class Name

Class R6

Trading Symbol

IDVSX

Annual or Semi-Annual Statement [Text Block]

Additional Information [Text Block]

You can find additional information about the Fund at www.morganstanley.com/im/shareholderreports. You can also request this information by contacting us at 1-800-869-6397.

Additional Information Phone Number

1-800-869-6397

Additional Information Website

Expenses [Text Block]

What were the Fund costs for the last six months?

(based on a hypothetical $10,000 investment)

Table Summary
Class Name	Costs of a $10,000 investment	Costs paid as a percentage of a $10,000 investment
Class R6	$46	0.91%^{Footnote Reference1}

Footnote	Description
Footnote¹	Annualized

Expenses Paid, Amount

$ 46

Expense Ratio, Percent

0.91%

^[77]

AssetsNet

$ 2,142,996,339

Holdings Count | Holding

InvestmentCompanyPortfolioTurnover

0.00%

Additional Fund Statistics [Text Block]

Key Fund Statistics

Table Summary
Total Net Assets	$2,142,996,339
# of Portfolio Holdings	35
Portfolio Turnover Rate	0%

Holdings [Text Block]

Country Allocation (% of total investments)

Table Summary
Value	Value
Other	9.0%
Sweden	5.2%
Italy	5.5%
Switzerland	5.9%
Denmark	6.3%
India	8.1%
United States	8.8%
Netherlands	9.7%
Taiwan	10.2%
Japan	10.5%
France	20.8%

Largest Holdings [Text Block]

Top Ten Holdings (% of total investments)^{Footnote Referencea}

Table Summary
Taiwan Semiconductor Manufacturing Co. Ltd.	10.2%
ASML Holding NV	8.8%
Keyence Corp.	6.6%
DSV AS	6.3%
Hermes International SCA	6.2%
Moncler SpA	5.4%
Schneider Electric SE	5.4%
Spotify Technology SA	5.2%
L'Oreal SA	4.8%
MercadoLibre, Inc.	3.3%
Total	62.2%

Footnote	Description
Footnote^a	Excluding cash equivalents.

Updated Prospectus Web Address

C000007759

Shareholder Report [Line Items]

Fund Name

Morgan Stanley Institutional Fund, Inc. - International Equity Portfolio

Class Name

Class A

Trading Symbol

MIQBX

Annual or Semi-Annual Statement [Text Block]

This semi-annual shareholder report contains important information about Morgan Stanley Institutional Fund, Inc. - International Equity Portfolio for the period of January 1, 2026 to June 30, 2026.

Additional Information [Text Block]

You can find additional information about the Fund at www.morganstanley.com/im/shareholderreports. You can also request this information by contacting us at 1-800-869-6397.

Additional Information Phone Number

1-800-869-6397

Additional Information Website

Expenses [Text Block]

What were the Fund costs for the last six months?

(based on a hypothetical $10,000 investment)

Table Summary
Class Name	Costs of a $10,000 investment	Costs paid as a percentage of a $10,000 investment
Class A	$66	1.30%^{Footnote Reference1}

Footnote	Description
Footnote¹	Annualized

Expenses Paid, Amount

$ 66

Expense Ratio, Percent

1.30%

^[78]

AssetsNet

$ 192,222,838

Holdings Count | Holding

InvestmentCompanyPortfolioTurnover

41.00%

Additional Fund Statistics [Text Block]

Key Fund Statistics

Table Summary
Total Net Assets	$192,222,838
# of Portfolio Holdings	48
Portfolio Turnover Rate	41%

Holdings [Text Block]

Country Allocation (% of total investments)

Table Summary
Value	Value
Other	6.0%
Sweden	2.6%
China	2.9%
Denmark	4.4%
Taiwan	5.1%
Netherlands	7.1%
Germany	7.5%
Italy	7.9%
Japan	10.6%
France	16.1%
United Kingdom	29.8%

Largest Holdings [Text Block]

Top Ten Holdings (% of total investments)^{Footnote Referencea}

Table Summary
Taiwan Semiconductor Manufacturing Co. Ltd.	5.1%
ASML Holding NV	4.1%
Keyence Corp.	4.1%
Safran SA	4.0%
L'Oreal SA	3.6%
Deutsche Boerse AG	3.4%
Shell PLC	3.2%
TotalEnergies SE	3.2%
AstraZeneca PLC	3.0%
London Stock Exchange Group PLC	2.9%
Total	36.6%

Footnote	Description
Footnote^a	Excluding cash equivalents.

Updated Prospectus Web Address

C000155894

Shareholder Report [Line Items]

Fund Name

Morgan Stanley Institutional Fund, Inc. - International Equity Portfolio

Class Name

Class C

Trading Symbol

MSECX

Annual or Semi-Annual Statement [Text Block]

This semi-annual shareholder report contains important information about Morgan Stanley Institutional Fund, Inc. - International Equity Portfolio for the period of January 1, 2026 to June 30, 2026.

Additional Information [Text Block]

You can find additional information about the Fund at www.morganstanley.com/im/shareholderreports. You can also request this information by contacting us at 1-800-869-6397.

Additional Information Phone Number

1-800-869-6397

Additional Information Website

Expenses [Text Block]

What were the Fund costs for the last six months?

(based on a hypothetical $10,000 investment)

Table Summary
Class Name	Costs of a $10,000 investment	Costs paid as a percentage of a $10,000 investment
Class C	$105	2.06%^{Footnote Reference1}

Footnote	Description
Footnote¹	Annualized

Expenses Paid, Amount

$ 105

Expense Ratio, Percent

2.06%

^[79]

AssetsNet

$ 192,222,838

Holdings Count | Holding

InvestmentCompanyPortfolioTurnover

41.00%

Additional Fund Statistics [Text Block]

Key Fund Statistics

Table Summary
Total Net Assets	$192,222,838
# of Portfolio Holdings	48
Portfolio Turnover Rate	41%

Holdings [Text Block]

Country Allocation (% of total investments)

Table Summary
Value	Value
Other	6.0%
Sweden	2.6%
China	2.9%
Denmark	4.4%
Taiwan	5.1%
Netherlands	7.1%
Germany	7.5%
Italy	7.9%
Japan	10.6%
France	16.1%
United Kingdom	29.8%

Largest Holdings [Text Block]

Top Ten Holdings (% of total investments)^{Footnote Referencea}

Table Summary
Taiwan Semiconductor Manufacturing Co. Ltd.	5.1%
ASML Holding NV	4.1%
Keyence Corp.	4.1%
Safran SA	4.0%
L'Oreal SA	3.6%
Deutsche Boerse AG	3.4%
Shell PLC	3.2%
TotalEnergies SE	3.2%
AstraZeneca PLC	3.0%
London Stock Exchange Group PLC	2.9%
Total	36.6%

Footnote	Description
Footnote^a	Excluding cash equivalents.

Updated Prospectus Web Address

C000007758

Shareholder Report [Line Items]

Fund Name

Morgan Stanley Institutional Fund, Inc. - International Equity Portfolio

Class Name

Class I

Trading Symbol

MSIQX

Annual or Semi-Annual Statement [Text Block]

This semi-annual shareholder report contains important information about Morgan Stanley Institutional Fund, Inc. - International Equity Portfolio for the period of January 1, 2026 to June 30, 2026.

Additional Information [Text Block]

You can find additional information about the Fund at www.morganstanley.com/im/shareholderreports. You can also request this information by contacting us at 1-800-869-6397.

Additional Information Phone Number

1-800-869-6397

Additional Information Website

Expenses [Text Block]

What were the Fund costs for the last six months?

(based on a hypothetical $10,000 investment)

Table Summary
Class Name	Costs of a $10,000 investment	Costs paid as a percentage of a $10,000 investment
Class I	$49	0.96%^{Footnote Reference1}

Footnote	Description
Footnote¹	Annualized

Expenses Paid, Amount

$ 49

Expense Ratio, Percent

0.96%

^[80]

AssetsNet

$ 192,222,838

Holdings Count | Holding

InvestmentCompanyPortfolioTurnover

41.00%

Additional Fund Statistics [Text Block]

Key Fund Statistics

Table Summary
Total Net Assets	$192,222,838
# of Portfolio Holdings	48
Portfolio Turnover Rate	41%

Holdings [Text Block]

Country Allocation (% of total investments)

Table Summary
Value	Value
Other	6.0%
Sweden	2.6%
China	2.9%
Denmark	4.4%
Taiwan	5.1%
Netherlands	7.1%
Germany	7.5%
Italy	7.9%
Japan	10.6%
France	16.1%
United Kingdom	29.8%

Largest Holdings [Text Block]

Top Ten Holdings (% of total investments)^{Footnote Referencea}

Table Summary
Taiwan Semiconductor Manufacturing Co. Ltd.	5.1%
ASML Holding NV	4.1%
Keyence Corp.	4.1%
Safran SA	4.0%
L'Oreal SA	3.6%
Deutsche Boerse AG	3.4%
Shell PLC	3.2%
TotalEnergies SE	3.2%
AstraZeneca PLC	3.0%
London Stock Exchange Group PLC	2.9%
Total	36.6%

Footnote	Description
Footnote^a	Excluding cash equivalents.

Updated Prospectus Web Address

C000113811

Shareholder Report [Line Items]

Fund Name

Morgan Stanley Institutional Fund, Inc. - International Equity Portfolio

Class Name

Class L

Trading Symbol

MSQLX

Annual or Semi-Annual Statement [Text Block]

This semi-annual shareholder report contains important information about Morgan Stanley Institutional Fund, Inc. - International Equity Portfolio for the period of January 1, 2026 to June 30, 2026.

Additional Information [Text Block]

You can find additional information about the Fund at www.morganstanley.com/im/shareholderreports. You can also request this information by contacting us at 1-800-869-6397.

Additional Information Phone Number

1-800-869-6397

Additional Information Website

Expenses [Text Block]

What were the Fund costs for the last six months?

(based on a hypothetical $10,000 investment)

Table Summary
Class Name	Costs of a $10,000 investment	Costs paid as a percentage of a $10,000 investment
Class L	$92	1.81%^{Footnote Reference1}

Footnote	Description
Footnote¹	Annualized

Expenses Paid, Amount

$ 92

Expense Ratio, Percent

1.81%

^[81]

AssetsNet

$ 192,222,838

Holdings Count | Holding

InvestmentCompanyPortfolioTurnover

41.00%

Additional Fund Statistics [Text Block]

Key Fund Statistics

Table Summary
Total Net Assets	$192,222,838
# of Portfolio Holdings	48
Portfolio Turnover Rate	41%

Holdings [Text Block]

Country Allocation (% of total investments)

Table Summary
Value	Value
Other	6.0%
Sweden	2.6%
China	2.9%
Denmark	4.4%
Taiwan	5.1%
Netherlands	7.1%
Germany	7.5%
Italy	7.9%
Japan	10.6%
France	16.1%
United Kingdom	29.8%

Largest Holdings [Text Block]

Top Ten Holdings (% of total investments)^{Footnote Referencea}

Table Summary
Taiwan Semiconductor Manufacturing Co. Ltd.	5.1%
ASML Holding NV	4.1%
Keyence Corp.	4.1%
Safran SA	4.0%
L'Oreal SA	3.6%
Deutsche Boerse AG	3.4%
Shell PLC	3.2%
TotalEnergies SE	3.2%
AstraZeneca PLC	3.0%
London Stock Exchange Group PLC	2.9%
Total	36.6%

Footnote	Description
Footnote^a	Excluding cash equivalents.

Updated Prospectus Web Address

C000126915

Shareholder Report [Line Items]

Fund Name

Morgan Stanley Institutional Fund, Inc. - International Equity Portfolio

Class Name

Class R6

Trading Symbol

MIQPX

Annual or Semi-Annual Statement [Text Block]

This semi-annual shareholder report contains important information about Morgan Stanley Institutional Fund, Inc. - International Equity Portfolio for the period of January 1, 2026 to June 30, 2026.

Additional Information [Text Block]

You can find additional information about the Fund at www.morganstanley.com/im/shareholderreports. You can also request this information by contacting us at 1-800-869-6397.

Additional Information Phone Number

1-800-869-6397

Additional Information Website

Expenses [Text Block]

What were the Fund costs for the last six months?

(based on a hypothetical $10,000 investment)

Table Summary
Class Name	Costs of a $10,000 investment	Costs paid as a percentage of a $10,000 investment
Class R6	$47	0.92%^{Footnote Reference1}

Footnote	Description
Footnote¹	Annualized

Expenses Paid, Amount

$ 47

Expense Ratio, Percent

0.92%

^[82]

AssetsNet

$ 192,222,838

Holdings Count | Holding

InvestmentCompanyPortfolioTurnover

41.00%

Additional Fund Statistics [Text Block]

Key Fund Statistics

Table Summary
Total Net Assets	$192,222,838
# of Portfolio Holdings	48
Portfolio Turnover Rate	41%

Holdings [Text Block]

Country Allocation (% of total investments)

Table Summary
Value	Value
Other	6.0%
Sweden	2.6%
China	2.9%
Denmark	4.4%
Taiwan	5.1%
Netherlands	7.1%
Germany	7.5%
Italy	7.9%
Japan	10.6%
France	16.1%
United Kingdom	29.8%

Largest Holdings [Text Block]

Top Ten Holdings (% of total investments)^{Footnote Referencea}

Table Summary
Taiwan Semiconductor Manufacturing Co. Ltd.	5.1%
ASML Holding NV	4.1%
Keyence Corp.	4.1%
Safran SA	4.0%
L'Oreal SA	3.6%
Deutsche Boerse AG	3.4%
Shell PLC	3.2%
TotalEnergies SE	3.2%
AstraZeneca PLC	3.0%
London Stock Exchange Group PLC	2.9%
Total	36.6%

Footnote	Description
Footnote^a	Excluding cash equivalents.

Updated Prospectus Web Address

C000085089

Shareholder Report [Line Items]

Fund Name

Morgan Stanley Institutional Fund, Inc. - International Opportunity Portfolio

Class Name

Class A

Trading Symbol

MIOPX

Annual or Semi-Annual Statement [Text Block]

This semi-annual shareholder report contains important information about Morgan Stanley Institutional Fund, Inc. - International Opportunity Portfolio for the period of January 1, 2026 to June 30, 2026.

Additional Information [Text Block]

You can find additional information about the Fund at www.morganstanley.com/im/shareholderreports. You can also request this information by contacting us at 1-800-869-6397.

Additional Information Phone Number

1-800-869-6397

Additional Information Website

Expenses [Text Block]

What were the Fund costs for the last six months?

(based on a hypothetical $10,000 investment)

Table Summary
Class Name	Costs of a $10,000 investment	Costs paid as a percentage of a $10,000 investment
Class A	$70	1.35%^{Footnote Reference1}

Footnote	Description
Footnote¹	Annualized

Expenses Paid, Amount

$ 70

Expense Ratio, Percent

1.35%

^[83]

AssetsNet

$ 651,277,307

Holdings Count | Holding

InvestmentCompanyPortfolioTurnover

14.00%

Additional Fund Statistics [Text Block]

Key Fund Statistics

Table Summary
Total Net Assets	$651,277,307
# of Portfolio Holdings	41
Portfolio Turnover Rate	14%

Holdings [Text Block]

Country Allocation (% of total investments)

Table Summary
Value	Value
Other	10.7%
Denmark	3.2%
Sweden	4.3%
Netherlands	5.7%
Taiwan	8.1%
China	8.2%
France	8.8%
India	9.4%
Japan	10.1%
United States	10.1%
Korea, Republic of	21.4%

Largest Holdings [Text Block]

Top Ten Holdings (% of total investments)^{Footnote Referencea}

Table Summary
SK Hynix, Inc.	10.6%
Taiwan Semiconductor Manufacturing Co. Ltd.	8.1%
Samsung Electronics Co. Ltd.	7.3%
ASML Holding NV	4.8%
Spotify Technology SA	4.3%
Hermes International SCA	4.3%
Sanrio Co. Ltd.	3.8%
MercadoLibre, Inc.	3.8%
Asics Corp.	3.3%
DSV AS	3.2%
Total	53.5%

Footnote	Description
Footnote^a	Excluding cash equivalents.

Updated Prospectus Web Address

C000155897

Shareholder Report [Line Items]

Fund Name

Morgan Stanley Institutional Fund, Inc. - International Opportunity Portfolio

Class Name

Class C

Trading Symbol

MSOCX

Annual or Semi-Annual Statement [Text Block]

Additional Information [Text Block]

You can find additional information about the Fund at www.morganstanley.com/im/shareholderreports. You can also request this information by contacting us at 1-800-869-6397.

Additional Information Phone Number

1-800-869-6397

Additional Information Website

Expenses [Text Block]

What were the Fund costs for the last six months?

(based on a hypothetical $10,000 investment)

Table Summary
Class Name	Costs of a $10,000 investment	Costs paid as a percentage of a $10,000 investment
Class C	$108	2.10%^{Footnote Reference1}

Footnote	Description
Footnote¹	Annualized

Expenses Paid, Amount

$ 108

Expense Ratio, Percent

2.10%

^[84]

AssetsNet

$ 651,277,307

Holdings Count | Holding

InvestmentCompanyPortfolioTurnover

14.00%

Additional Fund Statistics [Text Block]

Key Fund Statistics

Table Summary
Total Net Assets	$651,277,307
# of Portfolio Holdings	41
Portfolio Turnover Rate	14%

Holdings [Text Block]

Country Allocation (% of total investments)

Table Summary
Value	Value
Other	10.7%
Denmark	3.2%
Sweden	4.3%
Netherlands	5.7%
Taiwan	8.1%
China	8.2%
France	8.8%
India	9.4%
Japan	10.1%
United States	10.1%
Korea, Republic of	21.4%

Largest Holdings [Text Block]

Top Ten Holdings (% of total investments)^{Footnote Referencea}

Table Summary
SK Hynix, Inc.	10.6%
Taiwan Semiconductor Manufacturing Co. Ltd.	8.1%
Samsung Electronics Co. Ltd.	7.3%
ASML Holding NV	4.8%
Spotify Technology SA	4.3%
Hermes International SCA	4.3%
Sanrio Co. Ltd.	3.8%
MercadoLibre, Inc.	3.8%
Asics Corp.	3.3%
DSV AS	3.2%
Total	53.5%

Footnote	Description
Footnote^a	Excluding cash equivalents.

Updated Prospectus Web Address

C000085087

Shareholder Report [Line Items]

Fund Name

Morgan Stanley Institutional Fund, Inc. - International Opportunity Portfolio

Class Name

Class I

Trading Symbol

MIOIX

Annual or Semi-Annual Statement [Text Block]

Additional Information [Text Block]

You can find additional information about the Fund at www.morganstanley.com/im/shareholderreports. You can also request this information by contacting us at 1-800-869-6397.

Additional Information Phone Number

1-800-869-6397

Additional Information Website

Expenses [Text Block]

What were the Fund costs for the last six months?

(based on a hypothetical $10,000 investment)

Table Summary
Class Name	Costs of a $10,000 investment	Costs paid as a percentage of a $10,000 investment
Class I	$52	1.00%^{Footnote Reference1}

Footnote	Description
Footnote¹	Annualized

Expenses Paid, Amount

$ 52

Expense Ratio, Percent

1.00%

^[85]

AssetsNet

$ 651,277,307

Holdings Count | Holding

InvestmentCompanyPortfolioTurnover

14.00%

Additional Fund Statistics [Text Block]

Key Fund Statistics

Table Summary
Total Net Assets	$651,277,307
# of Portfolio Holdings	41
Portfolio Turnover Rate	14%

Holdings [Text Block]

Country Allocation (% of total investments)

Table Summary
Value	Value
Other	10.7%
Denmark	3.2%
Sweden	4.3%
Netherlands	5.7%
Taiwan	8.1%
China	8.2%
France	8.8%
India	9.4%
Japan	10.1%
United States	10.1%
Korea, Republic of	21.4%

Largest Holdings [Text Block]

Top Ten Holdings (% of total investments)^{Footnote Referencea}

Table Summary
SK Hynix, Inc.	10.6%
Taiwan Semiconductor Manufacturing Co. Ltd.	8.1%
Samsung Electronics Co. Ltd.	7.3%
ASML Holding NV	4.8%
Spotify Technology SA	4.3%
Hermes International SCA	4.3%
Sanrio Co. Ltd.	3.8%
MercadoLibre, Inc.	3.8%
Asics Corp.	3.3%
DSV AS	3.2%
Total	53.5%

Footnote	Description
Footnote^a	Excluding cash equivalents.

Updated Prospectus Web Address

C000198820

Shareholder Report [Line Items]

Fund Name

Morgan Stanley Institutional Fund, Inc. - International Opportunity Portfolio

Class Name

Class IR

Trading Symbol

MRNPX

Annual or Semi-Annual Statement [Text Block]

Additional Information [Text Block]

You can find additional information about the Fund at www.morganstanley.com/im/shareholderreports. You can also request this information by contacting us at 1-800-869-6397.

Additional Information Phone Number

1-800-869-6397

Additional Information Website

Expenses [Text Block]

What were the Fund costs for the last six months?

(based on a hypothetical $10,000 investment)

Table Summary
Class Name	Costs of a $10,000 investment	Costs paid as a percentage of a $10,000 investment
Class IR	$49	0.94%^{Footnote Reference1}

Footnote	Description
Footnote¹	Annualized

Expenses Paid, Amount

$ 49

Expense Ratio, Percent

0.94%

^[86]

AssetsNet

$ 651,277,307

Holdings Count | Holding

InvestmentCompanyPortfolioTurnover

14.00%

Additional Fund Statistics [Text Block]

Key Fund Statistics

Table Summary
Total Net Assets	$651,277,307
# of Portfolio Holdings	41
Portfolio Turnover Rate	14%

Holdings [Text Block]

Country Allocation (% of total investments)

Table Summary
Value	Value
Other	10.7%
Denmark	3.2%
Sweden	4.3%
Netherlands	5.7%
Taiwan	8.1%
China	8.2%
France	8.8%
India	9.4%
Japan	10.1%
United States	10.1%
Korea, Republic of	21.4%

Largest Holdings [Text Block]

Top Ten Holdings (% of total investments)^{Footnote Referencea}

Table Summary
SK Hynix, Inc.	10.6%
Taiwan Semiconductor Manufacturing Co. Ltd.	8.1%
Samsung Electronics Co. Ltd.	7.3%
ASML Holding NV	4.8%
Spotify Technology SA	4.3%
Hermes International SCA	4.3%
Sanrio Co. Ltd.	3.8%
MercadoLibre, Inc.	3.8%
Asics Corp.	3.3%
DSV AS	3.2%
Total	53.5%

Footnote	Description
Footnote^a	Excluding cash equivalents.

Updated Prospectus Web Address

C000085088

Shareholder Report [Line Items]

Fund Name

Morgan Stanley Institutional Fund, Inc. - International Opportunity Portfolio

Class Name

Class L

Trading Symbol

MIOLX

Annual or Semi-Annual Statement [Text Block]

Additional Information [Text Block]

You can find additional information about the Fund at www.morganstanley.com/im/shareholderreports. You can also request this information by contacting us at 1-800-869-6397.

Additional Information Phone Number

1-800-869-6397

Additional Information Website

Expenses [Text Block]

What were the Fund costs for the last six months?

(based on a hypothetical $10,000 investment)

Table Summary
Class Name	Costs of a $10,000 investment	Costs paid as a percentage of a $10,000 investment
Class L	$96	1.85%^{Footnote Reference1}

Footnote	Description
Footnote¹	Annualized

Expenses Paid, Amount

$ 96

Expense Ratio, Percent

1.85%

^[87]

AssetsNet

$ 651,277,307

Holdings Count | Holding

InvestmentCompanyPortfolioTurnover

14.00%

Additional Fund Statistics [Text Block]

Key Fund Statistics

Table Summary
Total Net Assets	$651,277,307
# of Portfolio Holdings	41
Portfolio Turnover Rate	14%

Holdings [Text Block]

Country Allocation (% of total investments)

Table Summary
Value	Value
Other	10.7%
Denmark	3.2%
Sweden	4.3%
Netherlands	5.7%
Taiwan	8.1%
China	8.2%
France	8.8%
India	9.4%
Japan	10.1%
United States	10.1%
Korea, Republic of	21.4%

Largest Holdings [Text Block]

Top Ten Holdings (% of total investments)^{Footnote Referencea}

Table Summary
SK Hynix, Inc.	10.6%
Taiwan Semiconductor Manufacturing Co. Ltd.	8.1%
Samsung Electronics Co. Ltd.	7.3%
ASML Holding NV	4.8%
Spotify Technology SA	4.3%
Hermes International SCA	4.3%
Sanrio Co. Ltd.	3.8%
MercadoLibre, Inc.	3.8%
Asics Corp.	3.3%
DSV AS	3.2%
Total	53.5%

Footnote	Description
Footnote^a	Excluding cash equivalents.

Updated Prospectus Web Address

C000126918

Shareholder Report [Line Items]

Fund Name

Morgan Stanley Institutional Fund, Inc. - International Opportunity Portfolio

Class Name

Class R6

Trading Symbol

MNOPX

Annual or Semi-Annual Statement [Text Block]

Additional Information [Text Block]

You can find additional information about the Fund at www.morganstanley.com/im/shareholderreports. You can also request this information by contacting us at 1-800-869-6397.

Additional Information Phone Number

1-800-869-6397

Additional Information Website

Expenses [Text Block]

What were the Fund costs for the last six months?

(based on a hypothetical $10,000 investment)

Table Summary
Class Name	Costs of a $10,000 investment	Costs paid as a percentage of a $10,000 investment
Class R6	$49	0.94%^{Footnote Reference1}

Footnote	Description
Footnote¹	Annualized

Expenses Paid, Amount

$ 49

Expense Ratio, Percent

0.94%

^[88]

AssetsNet

$ 651,277,307

Holdings Count | Holding

InvestmentCompanyPortfolioTurnover

14.00%

Additional Fund Statistics [Text Block]

Key Fund Statistics

Table Summary
Total Net Assets	$651,277,307
# of Portfolio Holdings	41
Portfolio Turnover Rate	14%

Holdings [Text Block]

Country Allocation (% of total investments)

Table Summary
Value	Value
Other	10.7%
Denmark	3.2%
Sweden	4.3%
Netherlands	5.7%
Taiwan	8.1%
China	8.2%
France	8.8%
India	9.4%
Japan	10.1%
United States	10.1%
Korea, Republic of	21.4%

Largest Holdings [Text Block]

Top Ten Holdings (% of total investments)^{Footnote Referencea}

Table Summary
SK Hynix, Inc.	10.6%
Taiwan Semiconductor Manufacturing Co. Ltd.	8.1%
Samsung Electronics Co. Ltd.	7.3%
ASML Holding NV	4.8%
Spotify Technology SA	4.3%
Hermes International SCA	4.3%
Sanrio Co. Ltd.	3.8%
MercadoLibre, Inc.	3.8%
Asics Corp.	3.3%
DSV AS	3.2%
Total	53.5%

Footnote	Description
Footnote^a	Excluding cash equivalents.

Updated Prospectus Web Address

C000236930

Shareholder Report [Line Items]

Fund Name

Morgan Stanley Institutional Fund, Inc - International Resilience Portfolio

Class Name

Class A

Trading Symbol

MSDFX

Annual or Semi-Annual Statement [Text Block]

This semi-annual shareholder report contains important information about Morgan Stanley Institutional Fund, Inc - International Resilience Portfolio for the period of January 1, 2026 to June 30, 2026.

Additional Information [Text Block]

You can find additional information about the Fund at www.morganstanley.com/im/shareholderreports. You can also request this information by contacting us at 1-800-869-6397.

Additional Information Phone Number

1-800-869-6397

Additional Information Website

Expenses [Text Block]

What were the Fund costs for the last six months?

(based on a hypothetical $10,000 investment)

Table Summary
Class Name	Costs of a $10,000 investment	Costs paid as a percentage of a $10,000 investment
Class A	$61	1.20%^{Footnote Reference1}

Footnote	Description
Footnote¹	Annualized

Expenses Paid, Amount

$ 61

Expense Ratio, Percent

1.20%

^[89]

AssetsNet

$ 2,212,951

Holdings Count | Holding

InvestmentCompanyPortfolioTurnover

36.00%

Additional Fund Statistics [Text Block]

Key Fund Statistics

Table Summary
Total Net Assets	$2,212,951
# of Portfolio Holdings	35
Portfolio Turnover Rate	36%

Holdings [Text Block]

Country Allocation (% of total investments)

Table Summary
Value	Value
Other	3.8%
Sweden	3.4%
Denmark	3.4%
Italy	3.9%
Germany	6.4%
Netherlands	6.6%
Japan	8.9%
Taiwan	9.1%
United States	10.9%
France	17.1%
United Kingdom	26.5%

Largest Holdings [Text Block]

Top Ten Holdings (% of total investments)^{Footnote Referencea}

Table Summary
Taiwan Semiconductor Manufacturing Co. Ltd.	9.1%
Safran SA	5.9%
Keyence Corp.	4.8%
ASML Holding NV	4.7%
L'Oreal SA	4.1%
Ferrari NV (Euronext NV)	3.9%
Deutsche Boerse AG	3.8%
Legrand SA	3.6%
DSV AS	3.4%
Atlas Copco AB	3.3%
Total	46.6%

Footnote	Description
Footnote^a	Excluding cash equivalents.

Updated Prospectus Web Address

C000236928

Shareholder Report [Line Items]

Fund Name

Morgan Stanley Institutional Fund, Inc - International Resilience Portfolio

Class Name

Class C

Trading Symbol

MSDEX

Annual or Semi-Annual Statement [Text Block]

Additional Information [Text Block]

You can find additional information about the Fund at www.morganstanley.com/im/shareholderreports. You can also request this information by contacting us at 1-800-869-6397.

Additional Information Phone Number

1-800-869-6397

Additional Information Website

Expenses [Text Block]

What were the Fund costs for the last six months?

(based on a hypothetical $10,000 investment)

Table Summary
Class Name	Costs of a $10,000 investment	Costs paid as a percentage of a $10,000 investment
Class C	$98	1.95%^{Footnote Reference1}

Footnote	Description
Footnote¹	Annualized

Expenses Paid, Amount

$ 98

Expense Ratio, Percent

1.95%

^[90]

AssetsNet

$ 2,212,951

Holdings Count | Holding

InvestmentCompanyPortfolioTurnover

36.00%

Additional Fund Statistics [Text Block]

Key Fund Statistics

Table Summary
Total Net Assets	$2,212,951
# of Portfolio Holdings	35
Portfolio Turnover Rate	36%

Holdings [Text Block]

Country Allocation (% of total investments)

Table Summary
Value	Value
Other	3.8%
Sweden	3.4%
Denmark	3.4%
Italy	3.9%
Germany	6.4%
Netherlands	6.6%
Japan	8.9%
Taiwan	9.1%
United States	10.9%
France	17.1%
United Kingdom	26.5%

Largest Holdings [Text Block]

Top Ten Holdings (% of total investments)^{Footnote Referencea}

Table Summary
Taiwan Semiconductor Manufacturing Co. Ltd.	9.1%
Safran SA	5.9%
Keyence Corp.	4.8%
ASML Holding NV	4.7%
L'Oreal SA	4.1%
Ferrari NV (Euronext NV)	3.9%
Deutsche Boerse AG	3.8%
Legrand SA	3.6%
DSV AS	3.4%
Atlas Copco AB	3.3%
Total	46.6%

Footnote	Description
Footnote^a	Excluding cash equivalents.

Updated Prospectus Web Address

C000236927

Shareholder Report [Line Items]

Fund Name

Morgan Stanley Institutional Fund, Inc - International Resilience Portfolio

Class Name

Class I

Trading Symbol

MSDKX

Annual or Semi-Annual Statement [Text Block]

Additional Information [Text Block]

You can find additional information about the Fund at www.morganstanley.com/im/shareholderreports. You can also request this information by contacting us at 1-800-869-6397.

Additional Information Phone Number

1-800-869-6397

Additional Information Website

Expenses [Text Block]

What were the Fund costs for the last six months?

(based on a hypothetical $10,000 investment)

Table Summary
Class Name	Costs of a $10,000 investment	Costs paid as a percentage of a $10,000 investment
Class I	$43	0.85%^{Footnote Reference1}

Footnote	Description
Footnote¹	Annualized

Expenses Paid, Amount

$ 43

Expense Ratio, Percent

0.85%

^[91]

AssetsNet

$ 2,212,951

Holdings Count | Holding

InvestmentCompanyPortfolioTurnover

36.00%

Additional Fund Statistics [Text Block]

Key Fund Statistics

Table Summary
Total Net Assets	$2,212,951
# of Portfolio Holdings	35
Portfolio Turnover Rate	36%

Holdings [Text Block]

Country Allocation (% of total investments)

Table Summary
Value	Value
Other	3.8%
Sweden	3.4%
Denmark	3.4%
Italy	3.9%
Germany	6.4%
Netherlands	6.6%
Japan	8.9%
Taiwan	9.1%
United States	10.9%
France	17.1%
United Kingdom	26.5%

Largest Holdings [Text Block]

Top Ten Holdings (% of total investments)^{Footnote Referencea}

Table Summary
Taiwan Semiconductor Manufacturing Co. Ltd.	9.1%
Safran SA	5.9%
Keyence Corp.	4.8%
ASML Holding NV	4.7%
L'Oreal SA	4.1%
Ferrari NV (Euronext NV)	3.9%
Deutsche Boerse AG	3.8%
Legrand SA	3.6%
DSV AS	3.4%
Atlas Copco AB	3.3%
Total	46.6%

Footnote	Description
Footnote^a	Excluding cash equivalents.

Updated Prospectus Web Address

C000236929

Shareholder Report [Line Items]

Fund Name

Morgan Stanley Institutional Fund, Inc - International Resilience Portfolio

Class Name

Class R6

Trading Symbol

MSCZX

Annual or Semi-Annual Statement [Text Block]

Additional Information [Text Block]

You can find additional information about the Fund at www.morganstanley.com/im/shareholderreports. You can also request this information by contacting us at 1-800-869-6397.

Additional Information Phone Number

1-800-869-6397

Additional Information Website

Expenses [Text Block]

What were the Fund costs for the last six months?

(based on a hypothetical $10,000 investment)

Table Summary
Class Name	Costs of a $10,000 investment	Costs paid as a percentage of a $10,000 investment
Class R6	$40	0.80%^{Footnote Reference1}

Footnote	Description
Footnote¹	Annualized

Expenses Paid, Amount

$ 40

Expense Ratio, Percent

0.80%

^[92]

AssetsNet

$ 2,212,951

Holdings Count | Holding

InvestmentCompanyPortfolioTurnover

36.00%

Additional Fund Statistics [Text Block]

Key Fund Statistics

Table Summary
Total Net Assets	$2,212,951
# of Portfolio Holdings	35
Portfolio Turnover Rate	36%

Holdings [Text Block]

Country Allocation (% of total investments)

Table Summary
Value	Value
Other	3.8%
Sweden	3.4%
Denmark	3.4%
Italy	3.9%
Germany	6.4%
Netherlands	6.6%
Japan	8.9%
Taiwan	9.1%
United States	10.9%
France	17.1%
United Kingdom	26.5%

Largest Holdings [Text Block]

Top Ten Holdings (% of total investments)^{Footnote Referencea}

Table Summary
Taiwan Semiconductor Manufacturing Co. Ltd.	9.1%
Safran SA	5.9%
Keyence Corp.	4.8%
ASML Holding NV	4.7%
L'Oreal SA	4.1%
Ferrari NV (Euronext NV)	3.9%
Deutsche Boerse AG	3.8%
Legrand SA	3.6%
DSV AS	3.4%
Atlas Copco AB	3.3%
Total	46.6%

Footnote	Description
Footnote^a	Excluding cash equivalents.

Updated Prospectus Web Address

C000007737

Shareholder Report [Line Items]

Fund Name

Morgan Stanley Institutional Fund, Inc. - Passport Overseas Equity Portfolio

Class Name

Class A

Trading Symbol

MSIBX

Annual or Semi-Annual Statement [Text Block]

This semi-annual shareholder report contains important information about Morgan Stanley Institutional Fund, Inc. - Passport Overseas Equity Portfolio for the period of January 1, 2026 to June 30, 2026.

Additional Information [Text Block]

You can find additional information about the Fund at www.morganstanley.com/im/shareholderreports. You can also request this information by contacting us at 1-800-869-6397.

Additional Information Phone Number

1-800-869-6397

Additional Information Website

Expenses [Text Block]

What were the Fund costs for the last six months?

(based on a hypothetical $10,000 investment)

Table Summary
Class Name	Costs of a $10,000 investment	Costs paid as a percentage of a $10,000 investment
Class A	$65	1.20%^{Footnote Reference1}

Footnote	Description
Footnote¹	Annualized

Expenses Paid, Amount

$ 65

Expense Ratio, Percent

1.20%

^[93]

AssetsNet

$ 198,678,718

Holdings Count | Holding

InvestmentCompanyPortfolioTurnover

24.00%

Additional Fund Statistics [Text Block]

Key Fund Statistics

Table Summary
Total Net Assets	$198,678,718
# of Portfolio Holdings	91
Portfolio Turnover Rate	24%

Holdings [Text Block]

Country Allocation (% of total investments)

Table Summary
Value	Value
Other	26.1%
China	4.4%
Germany	5.0%
India	5.9%
United Kingdom	6.5%
Canada	6.5%
Taiwan	6.6%
United States	6.7%
France	7.7%
Korea, Republic of	12.2%
Japan	12.4%

Largest Holdings [Text Block]

Top Ten Holdings (% of total investments)^{Footnote Referencea}

Table Summary
Taiwan Semiconductor Manufacturing Co. Ltd.	6.6%
Samsung Electronics Co. Ltd.	5.6%
SK Hynix, Inc.	4.6%
ASML Holding NV	2.8%
CaixaBank SA	2.8%
Mizuho Financial Group, Inc.	2.7%
AIB Group PLC	2.6%
OTP Bank Nyrt	2.1%
AstraZeneca PLC	2.0%
Royal Bank of Canada	2.0%
Total	33.8%

Footnote	Description
Footnote^a	Excluding cash equivalents.

Updated Prospectus Web Address

C000155887

Shareholder Report [Line Items]

Fund Name

Morgan Stanley Institutional Fund, Inc. - Passport Overseas Equity Portfolio

Class Name

Class C

Trading Symbol

MSAAX

Annual or Semi-Annual Statement [Text Block]

Additional Information [Text Block]

You can find additional information about the Fund at www.morganstanley.com/im/shareholderreports. You can also request this information by contacting us at 1-800-869-6397.

Additional Information Phone Number

1-800-869-6397

Additional Information Website

Expenses [Text Block]

What were the Fund costs for the last six months?

(based on a hypothetical $10,000 investment)

Table Summary
Class Name	Costs of a $10,000 investment	Costs paid as a percentage of a $10,000 investment
Class C	$107	1.99%^{Footnote Reference1}

Footnote	Description
Footnote¹	Annualized

Expenses Paid, Amount

$ 107

Expense Ratio, Percent

1.99%

^[94]

AssetsNet

$ 198,678,718

Holdings Count | Holding

InvestmentCompanyPortfolioTurnover

24.00%

Additional Fund Statistics [Text Block]

Key Fund Statistics

Table Summary
Total Net Assets	$198,678,718
# of Portfolio Holdings	91
Portfolio Turnover Rate	24%

Holdings [Text Block]

Country Allocation (% of total investments)

Table Summary
Value	Value
Other	26.1%
China	4.4%
Germany	5.0%
India	5.9%
United Kingdom	6.5%
Canada	6.5%
Taiwan	6.6%
United States	6.7%
France	7.7%
Korea, Republic of	12.2%
Japan	12.4%

Largest Holdings [Text Block]

Top Ten Holdings (% of total investments)^{Footnote Referencea}

Table Summary
Taiwan Semiconductor Manufacturing Co. Ltd.	6.6%
Samsung Electronics Co. Ltd.	5.6%
SK Hynix, Inc.	4.6%
ASML Holding NV	2.8%
CaixaBank SA	2.8%
Mizuho Financial Group, Inc.	2.7%
AIB Group PLC	2.6%
OTP Bank Nyrt	2.1%
AstraZeneca PLC	2.0%
Royal Bank of Canada	2.0%
Total	33.8%

Footnote	Description
Footnote^a	Excluding cash equivalents.

Updated Prospectus Web Address

C000007736

Shareholder Report [Line Items]

Fund Name

Morgan Stanley Institutional Fund, Inc. - Passport Overseas Equity Portfolio

Class Name

Class I

Trading Symbol

MSACX

Annual or Semi-Annual Statement [Text Block]

Additional Information [Text Block]

You can find additional information about the Fund at www.morganstanley.com/im/shareholderreports. You can also request this information by contacting us at 1-800-869-6397.

Additional Information Phone Number

1-800-869-6397

Additional Information Website

Expenses [Text Block]

What were the Fund costs for the last six months?

(based on a hypothetical $10,000 investment)

Table Summary
Class Name	Costs of a $10,000 investment	Costs paid as a percentage of a $10,000 investment
Class I	$48	0.89%^{Footnote Reference1}

Footnote	Description
Footnote¹	Annualized

Expenses Paid, Amount

$ 48

Expense Ratio, Percent

0.89%

^[95]

AssetsNet

$ 198,678,718

Holdings Count | Holding

InvestmentCompanyPortfolioTurnover

24.00%

Additional Fund Statistics [Text Block]

Key Fund Statistics

Table Summary
Total Net Assets	$198,678,718
# of Portfolio Holdings	91
Portfolio Turnover Rate	24%

Holdings [Text Block]

Country Allocation (% of total investments)

Table Summary
Value	Value
Other	26.1%
China	4.4%
Germany	5.0%
India	5.9%
United Kingdom	6.5%
Canada	6.5%
Taiwan	6.6%
United States	6.7%
France	7.7%
Korea, Republic of	12.2%
Japan	12.4%

Largest Holdings [Text Block]

Top Ten Holdings (% of total investments)^{Footnote Referencea}

Table Summary
Taiwan Semiconductor Manufacturing Co. Ltd.	6.6%
Samsung Electronics Co. Ltd.	5.6%
SK Hynix, Inc.	4.6%
ASML Holding NV	2.8%
CaixaBank SA	2.8%
Mizuho Financial Group, Inc.	2.7%
AIB Group PLC	2.6%
OTP Bank Nyrt	2.1%
AstraZeneca PLC	2.0%
Royal Bank of Canada	2.0%
Total	33.8%

Footnote	Description
Footnote^a	Excluding cash equivalents.

Updated Prospectus Web Address

C000215549

Shareholder Report [Line Items]

Fund Name

Morgan Stanley Institutional Fund, Inc. - Passport Overseas Equity Portfolio

Class Name

Class IR

Trading Symbol

MAIHX

Annual or Semi-Annual Statement [Text Block]

Additional Information [Text Block]

You can find additional information about the Fund at www.morganstanley.com/im/shareholderreports. You can also request this information by contacting us at 1-800-869-6397.

Additional Information Phone Number

1-800-869-6397

Additional Information Website

Expenses [Text Block]

What were the Fund costs for the last six months?

(based on a hypothetical $10,000 investment)

Table Summary
Class Name	Costs of a $10,000 investment	Costs paid as a percentage of a $10,000 investment
Class IR	$45	0.84%^{Footnote Reference1}

Footnote	Description
Footnote¹	Annualized

Expenses Paid, Amount

$ 45

Expense Ratio, Percent

0.84%

^[96]

AssetsNet

$ 198,678,718

Holdings Count | Holding

InvestmentCompanyPortfolioTurnover

24.00%

Additional Fund Statistics [Text Block]

Key Fund Statistics

Table Summary
Total Net Assets	$198,678,718
# of Portfolio Holdings	91
Portfolio Turnover Rate	24%

Holdings [Text Block]

Country Allocation (% of total investments)

Table Summary
Value	Value
Other	26.1%
China	4.4%
Germany	5.0%
India	5.9%
United Kingdom	6.5%
Canada	6.5%
Taiwan	6.6%
United States	6.7%
France	7.7%
Korea, Republic of	12.2%
Japan	12.4%

Largest Holdings [Text Block]

Top Ten Holdings (% of total investments)^{Footnote Referencea}

Table Summary
Taiwan Semiconductor Manufacturing Co. Ltd.	6.6%
Samsung Electronics Co. Ltd.	5.6%
SK Hynix, Inc.	4.6%
ASML Holding NV	2.8%
CaixaBank SA	2.8%
Mizuho Financial Group, Inc.	2.7%
AIB Group PLC	2.6%
OTP Bank Nyrt	2.1%
AstraZeneca PLC	2.0%
Royal Bank of Canada	2.0%
Total	33.8%

Footnote	Description
Footnote^a	Excluding cash equivalents.

Updated Prospectus Web Address

C000113799

Shareholder Report [Line Items]

Fund Name

Morgan Stanley Institutional Fund, Inc. - Passport Overseas Equity Portfolio

Class Name

Class L

Trading Symbol

MSLLX

Annual or Semi-Annual Statement [Text Block]

Additional Information [Text Block]

You can find additional information about the Fund at www.morganstanley.com/im/shareholderreports. You can also request this information by contacting us at 1-800-869-6397.

Additional Information Phone Number

1-800-869-6397

Additional Information Website

Expenses [Text Block]

What were the Fund costs for the last six months?

(based on a hypothetical $10,000 investment)

Table Summary
Class Name	Costs of a $10,000 investment	Costs paid as a percentage of a $10,000 investment
Class L	$93	1.73%^{Footnote Reference1}

Footnote	Description
Footnote¹	Annualized

Expenses Paid, Amount

$ 93

Expense Ratio, Percent

1.73%

^[97]

AssetsNet

$ 198,678,718

Holdings Count | Holding

InvestmentCompanyPortfolioTurnover

24.00%

Additional Fund Statistics [Text Block]

Key Fund Statistics

Table Summary
Total Net Assets	$198,678,718
# of Portfolio Holdings	91
Portfolio Turnover Rate	24%

Holdings [Text Block]

Country Allocation (% of total investments)

Table Summary
Value	Value
Other	26.1%
China	4.4%
Germany	5.0%
India	5.9%
United Kingdom	6.5%
Canada	6.5%
Taiwan	6.6%
United States	6.7%
France	7.7%
Korea, Republic of	12.2%
Japan	12.4%

Largest Holdings [Text Block]

Top Ten Holdings (% of total investments)^{Footnote Referencea}

Table Summary
Taiwan Semiconductor Manufacturing Co. Ltd.	6.6%
Samsung Electronics Co. Ltd.	5.6%
SK Hynix, Inc.	4.6%
ASML Holding NV	2.8%
CaixaBank SA	2.8%
Mizuho Financial Group, Inc.	2.7%
AIB Group PLC	2.6%
OTP Bank Nyrt	2.1%
AstraZeneca PLC	2.0%
Royal Bank of Canada	2.0%
Total	33.8%

Footnote	Description
Footnote^a	Excluding cash equivalents.

Updated Prospectus Web Address

C000215548

Shareholder Report [Line Items]

Fund Name

Morgan Stanley Institutional Fund, Inc. - Passport Overseas Equity Portfolio

Class Name

Class R6

Trading Symbol

MAIJX

Annual or Semi-Annual Statement [Text Block]

Additional Information [Text Block]

You can find additional information about the Fund at www.morganstanley.com/im/shareholderreports. You can also request this information by contacting us at 1-800-869-6397.

Additional Information Phone Number

1-800-869-6397

Additional Information Website

Expenses [Text Block]

What were the Fund costs for the last six months?

(based on a hypothetical $10,000 investment)

Table Summary
Class Name	Costs of a $10,000 investment	Costs paid as a percentage of a $10,000 investment
Class R6	$45	0.84%^{Footnote Reference1}

Footnote	Description
Footnote¹	Annualized

Expenses Paid, Amount

$ 45

Expense Ratio, Percent

0.84%

^[98]

AssetsNet

$ 198,678,718

Holdings Count | Holding

InvestmentCompanyPortfolioTurnover

24.00%

Additional Fund Statistics [Text Block]

Key Fund Statistics

Table Summary
Total Net Assets	$198,678,718
# of Portfolio Holdings	91
Portfolio Turnover Rate	24%

Holdings [Text Block]

Country Allocation (% of total investments)

Table Summary
Value	Value
Other	26.1%
China	4.4%
Germany	5.0%
India	5.9%
United Kingdom	6.5%
Canada	6.5%
Taiwan	6.6%
United States	6.7%
France	7.7%
Korea, Republic of	12.2%
Japan	12.4%

Largest Holdings [Text Block]

Top Ten Holdings (% of total investments)^{Footnote Referencea}

Table Summary
Taiwan Semiconductor Manufacturing Co. Ltd.	6.6%
Samsung Electronics Co. Ltd.	5.6%
SK Hynix, Inc.	4.6%
ASML Holding NV	2.8%
CaixaBank SA	2.8%
Mizuho Financial Group, Inc.	2.7%
AIB Group PLC	2.6%
OTP Bank Nyrt	2.1%
AstraZeneca PLC	2.0%
Royal Bank of Canada	2.0%
Total	33.8%

Footnote	Description
Footnote^a	Excluding cash equivalents.

Updated Prospectus Web Address

C000218315

Shareholder Report [Line Items]

Fund Name

Morgan Stanley Institutional Fund, Inc. - Permanence Portfolio

Class Name

Class A

Trading Symbol

MSHNX

Annual or Semi-Annual Statement [Text Block]

This semi-annual shareholder report contains important information about Morgan Stanley Institutional Fund, Inc. - Permanence Portfolio for the period of January 1, 2026 to June 30, 2026.

Additional Information [Text Block]

You can find additional information about the Fund at www.morganstanley.com/im/shareholderreports. You can also request this information by contacting us at 1-800-869-6397.

Additional Information Phone Number

1-800-869-6397

Additional Information Website

Expenses [Text Block]

What were the Fund costs for the last six months?

(based on a hypothetical $10,000 investment)

Table Summary
Class Name	Costs of a $10,000 investment	Costs paid as a percentage of a $10,000 investment
Class A	$60	1.20%^{Footnote Reference1}

Footnote	Description
Footnote¹	Annualized

Expenses Paid, Amount

$ 60

Expense Ratio, Percent

1.20%

^[99]

AssetsNet

$ 3,771,909

Holdings Count | Holding

InvestmentCompanyPortfolioTurnover

78.00%

Additional Fund Statistics [Text Block]

Key Fund Statistics

Table Summary
Total Net Assets	$3,771,909
# of Portfolio Holdings	80
Portfolio Turnover Rate	78%

Holdings [Text Block]

Sector Allocation (% of total investments)

Table Summary
Value	Value
Energy	0.1%
Real Estate	1.0%
Short-Term Investments	1.3%
Materials	2.3%
Consumer Staples	5.0%
Communication Services	6.1%
Financials	7.5%
Consumer Discretionary	14.5%
Health Care	15.9%
Information Technology	21.0%
Industrials	25.3%

Largest Holdings [Text Block]

Top Ten Holdings (% of total investments)^{Footnote Referencea}

Table Summary
Cloudflare, Inc.	13.7%
Royalty Pharma PLC	9.9%
QXO, Inc.	5.8%
Madison Air Solutions Corp.	5.4%
Core & Main, Inc.	4.6%
Medline, Inc.	4.3%
DoorDash, Inc.	4.1%
Tesla, Inc.	2.8%
Celsius Holdings, Inc.	2.6%
Verisk Analytics, Inc.	2.6%
Total	55.8%

Footnote	Description
Footnote^a	Excluding cash equivalents.

Updated Prospectus Web Address

C000218316

Shareholder Report [Line Items]

Fund Name

Morgan Stanley Institutional Fund, Inc. - Permanence Portfolio

Class Name

Class C

Trading Symbol

MSHOX

Annual or Semi-Annual Statement [Text Block]

This semi-annual shareholder report contains important information about Morgan Stanley Institutional Fund, Inc. - Permanence Portfolio for the period of January 1, 2026 to June 30, 2026.

Additional Information [Text Block]

You can find additional information about the Fund at www.morganstanley.com/im/shareholderreports. You can also request this information by contacting us at 1-800-869-6397.

Additional Information Phone Number

1-800-869-6397

Additional Information Website

Expenses [Text Block]

What were the Fund costs for the last six months?

(based on a hypothetical $10,000 investment)

Table Summary
Class Name	Costs of a $10,000 investment	Costs paid as a percentage of a $10,000 investment
Class C	$98	1.95%^{Footnote Reference1}

Footnote	Description
Footnote¹	Annualized

Expenses Paid, Amount

$ 98

Expense Ratio, Percent

1.95%

^[100]

AssetsNet

$ 3,771,909

Holdings Count | Holding

InvestmentCompanyPortfolioTurnover

78.00%

Additional Fund Statistics [Text Block]

Key Fund Statistics

Table Summary
Total Net Assets	$3,771,909
# of Portfolio Holdings	80
Portfolio Turnover Rate	78%

Holdings [Text Block]

Sector Allocation (% of total investments)

Table Summary
Value	Value
Energy	0.1%
Real Estate	1.0%
Short-Term Investments	1.3%
Materials	2.3%
Consumer Staples	5.0%
Communication Services	6.1%
Financials	7.5%
Consumer Discretionary	14.5%
Health Care	15.9%
Information Technology	21.0%
Industrials	25.3%

Largest Holdings [Text Block]

Top Ten Holdings (% of total investments)^{Footnote Referencea}

Table Summary
Cloudflare, Inc.	13.7%
Royalty Pharma PLC	9.9%
QXO, Inc.	5.8%
Madison Air Solutions Corp.	5.4%
Core & Main, Inc.	4.6%
Medline, Inc.	4.3%
DoorDash, Inc.	4.1%
Tesla, Inc.	2.8%
Celsius Holdings, Inc.	2.6%
Verisk Analytics, Inc.	2.6%
Total	55.8%

Footnote	Description
Footnote^a	Excluding cash equivalents.

Updated Prospectus Web Address

C000218317

Shareholder Report [Line Items]

Fund Name

Morgan Stanley Institutional Fund, Inc. - Permanence Portfolio

Class Name

Class I

Trading Symbol

MSHMX

Annual or Semi-Annual Statement [Text Block]

This semi-annual shareholder report contains important information about Morgan Stanley Institutional Fund, Inc. - Permanence Portfolio for the period of January 1, 2026 to June 30, 2026.

Additional Information [Text Block]

You can find additional information about the Fund at www.morganstanley.com/im/shareholderreports. You can also request this information by contacting us at 1-800-869-6397.

Additional Information Phone Number

1-800-869-6397

Additional Information Website

Expenses [Text Block]

What were the Fund costs for the last six months?

(based on a hypothetical $10,000 investment)

Table Summary
Class Name	Costs of a $10,000 investment	Costs paid as a percentage of a $10,000 investment
Class I	$43	0.85%^{Footnote Reference1}

Footnote	Description
Footnote¹	Annualized

Expenses Paid, Amount

$ 43

Expense Ratio, Percent

0.85%

^[101]

AssetsNet

$ 3,771,909

Holdings Count | Holding

InvestmentCompanyPortfolioTurnover

78.00%

Additional Fund Statistics [Text Block]

Key Fund Statistics

Table Summary
Total Net Assets	$3,771,909
# of Portfolio Holdings	80
Portfolio Turnover Rate	78%

Holdings [Text Block]

Sector Allocation (% of total investments)

Table Summary
Value	Value
Energy	0.1%
Real Estate	1.0%
Short-Term Investments	1.3%
Materials	2.3%
Consumer Staples	5.0%
Communication Services	6.1%
Financials	7.5%
Consumer Discretionary	14.5%
Health Care	15.9%
Information Technology	21.0%
Industrials	25.3%

Largest Holdings [Text Block]

Top Ten Holdings (% of total investments)^{Footnote Referencea}

Table Summary
Cloudflare, Inc.	13.7%
Royalty Pharma PLC	9.9%
QXO, Inc.	5.8%
Madison Air Solutions Corp.	5.4%
Core & Main, Inc.	4.6%
Medline, Inc.	4.3%
DoorDash, Inc.	4.1%
Tesla, Inc.	2.8%
Celsius Holdings, Inc.	2.6%
Verisk Analytics, Inc.	2.6%
Total	55.8%

Footnote	Description
Footnote^a	Excluding cash equivalents.

Updated Prospectus Web Address

C000218314

Shareholder Report [Line Items]

Fund Name

Morgan Stanley Institutional Fund, Inc. - Permanence Portfolio

Class Name

Class R6

Trading Symbol

MSHPX

Annual or Semi-Annual Statement [Text Block]

This semi-annual shareholder report contains important information about Morgan Stanley Institutional Fund, Inc. - Permanence Portfolio for the period of January 1, 2026 to June 30, 2026.

Additional Information [Text Block]

You can find additional information about the Fund at www.morganstanley.com/im/shareholderreports. You can also request this information by contacting us at 1-800-869-6397.

Additional Information Phone Number

1-800-869-6397

Additional Information Website

Expenses [Text Block]

What were the Fund costs for the last six months?

(based on a hypothetical $10,000 investment)

Table Summary
Class Name	Costs of a $10,000 investment	Costs paid as a percentage of a $10,000 investment
Class R6	$40	0.80%^{Footnote Reference1}

Footnote	Description
Footnote¹	Annualized

Expenses Paid, Amount

$ 40

Expense Ratio, Percent

0.80%

^[102]

AssetsNet

$ 3,771,909

Holdings Count | Holding

InvestmentCompanyPortfolioTurnover

78.00%

Additional Fund Statistics [Text Block]

Key Fund Statistics

Table Summary
Total Net Assets	$3,771,909
# of Portfolio Holdings	80
Portfolio Turnover Rate	78%

Holdings [Text Block]

Sector Allocation (% of total investments)

Table Summary
Value	Value
Energy	0.1%
Real Estate	1.0%
Short-Term Investments	1.3%
Materials	2.3%
Consumer Staples	5.0%
Communication Services	6.1%
Financials	7.5%
Consumer Discretionary	14.5%
Health Care	15.9%
Information Technology	21.0%
Industrials	25.3%

Largest Holdings [Text Block]

Top Ten Holdings (% of total investments)^{Footnote Referencea}

Table Summary
Cloudflare, Inc.	13.7%
Royalty Pharma PLC	9.9%
QXO, Inc.	5.8%
Madison Air Solutions Corp.	5.4%
Core & Main, Inc.	4.6%
Medline, Inc.	4.3%
DoorDash, Inc.	4.1%
Tesla, Inc.	2.8%
Celsius Holdings, Inc.	2.6%
Verisk Analytics, Inc.	2.6%
Total	55.8%

Footnote	Description
Footnote^a	Excluding cash equivalents.

Updated Prospectus Web Address

C000169221

Shareholder Report [Line Items]

Fund Name

Morgan Stanley Institutional Fund, Inc. - US Core Portfolio

Class Name

Class A

Trading Symbol

MUOAX

Annual or Semi-Annual Statement [Text Block]

This semi-annual shareholder report contains important information about Morgan Stanley Institutional Fund, Inc. - US Core Portfolio for the period of January 1, 2026 to June 30, 2026.

Additional Information [Text Block]

You can find additional information about the Fund at www.morganstanley.com/im/shareholderreports. You can also request this information by contacting us at 1-800-869-6397.

Additional Information Phone Number

1-800-869-6397

Additional Information Website

Expenses [Text Block]

What were the Fund costs for the last six months?

(based on a hypothetical $10,000 investment)

Table Summary
Class Name	Costs of a $10,000 investment	Costs paid as a percentage of a $10,000 investment
Class A	$55	1.10%^{Footnote Reference1}

Footnote	Description
Footnote¹	Annualized

Expenses Paid, Amount

$ 55

Expense Ratio, Percent

1.10%

^[103]

AssetsNet

$ 417,503,666

Holdings Count | Holding

InvestmentCompanyPortfolioTurnover

29.00%

Additional Fund Statistics [Text Block]

Key Fund Statistics

Table Summary
Total Net Assets	$417,503,666
# of Portfolio Holdings	33
Portfolio Turnover Rate	29%

Holdings [Text Block]

Sector Allocation (% of total investments)

Table Summary
Value	Value
Short-Term Investments	0.0%^{Footnote Reference†}
Real Estate	1.1%
Materials	1.8%
Consumer Staples	1.9%
Energy	4.3%
Health Care	4.9%
Industrials	7.3%
Consumer Discretionary	10.2%
Communication Services	13.2%
Financials	16.0%
Information Technology	39.3%

Footnote	Description
Footnote^†	Amount is less than 0.05%

Largest Holdings [Text Block]

Top Ten Holdings (% of total investments)^{Footnote Referencea}

Table Summary
Alphabet, Inc.	11.9%
NVIDIA Corp.	11.7%
Apple, Inc.	10.4%
JPMorgan Chase & Co.	6.3%
General Electric Co.	5.6%
Amazon.com, Inc.	5.4%
Eli Lilly & Co.	4.9%
Micron Technology, Inc.	4.6%
Microsoft Corp.	4.5%
Jabil, Inc.	3.3%
Total	68.6%

Footnote	Description
Footnote^a	Excluding cash equivalents.

Updated Prospectus Web Address

C000169222

Shareholder Report [Line Items]

Fund Name

Morgan Stanley Institutional Fund, Inc. - US Core Portfolio

Class Name

Class C

Trading Symbol

MUOCX

Annual or Semi-Annual Statement [Text Block]

This semi-annual shareholder report contains important information about Morgan Stanley Institutional Fund, Inc. - US Core Portfolio for the period of January 1, 2026 to June 30, 2026.

Additional Information [Text Block]

You can find additional information about the Fund at www.morganstanley.com/im/shareholderreports. You can also request this information by contacting us at 1-800-869-6397.

Additional Information Phone Number

1-800-869-6397

Additional Information Website

Expenses [Text Block]

What were the Fund costs for the last six months?

(based on a hypothetical $10,000 investment)

Table Summary
Class Name	Costs of a $10,000 investment	Costs paid as a percentage of a $10,000 investment
Class C	$93	1.86%^{Footnote Reference1}

Footnote	Description
Footnote¹	Annualized

Expenses Paid, Amount

$ 93

Expense Ratio, Percent

1.86%

^[104]

AssetsNet

$ 417,503,666

Holdings Count | Holding

InvestmentCompanyPortfolioTurnover

29.00%

Additional Fund Statistics [Text Block]

Key Fund Statistics

Table Summary
Total Net Assets	$417,503,666
# of Portfolio Holdings	33
Portfolio Turnover Rate	29%

Holdings [Text Block]

Sector Allocation (% of total investments)

Table Summary
Value	Value
Short-Term Investments	0.0%^{Footnote Reference†}
Real Estate	1.1%
Materials	1.8%
Consumer Staples	1.9%
Energy	4.3%
Health Care	4.9%
Industrials	7.3%
Consumer Discretionary	10.2%
Communication Services	13.2%
Financials	16.0%
Information Technology	39.3%

Footnote	Description
Footnote^†	Amount is less than 0.05%

Largest Holdings [Text Block]

Top Ten Holdings (% of total investments)^{Footnote Referencea}

Table Summary
Alphabet, Inc.	11.9%
NVIDIA Corp.	11.7%
Apple, Inc.	10.4%
JPMorgan Chase & Co.	6.3%
General Electric Co.	5.6%
Amazon.com, Inc.	5.4%
Eli Lilly & Co.	4.9%
Micron Technology, Inc.	4.6%
Microsoft Corp.	4.5%
Jabil, Inc.	3.3%
Total	68.6%

Footnote	Description
Footnote^a	Excluding cash equivalents.

Updated Prospectus Web Address

C000169220

Shareholder Report [Line Items]

Fund Name

Morgan Stanley Institutional Fund, Inc. - US Core Portfolio

Class Name

Class I

Trading Symbol

MUOIX

Annual or Semi-Annual Statement [Text Block]

This semi-annual shareholder report contains important information about Morgan Stanley Institutional Fund, Inc. - US Core Portfolio for the period of January 1, 2026 to June 30, 2026.

Additional Information [Text Block]

You can find additional information about the Fund at www.morganstanley.com/im/shareholderreports. You can also request this information by contacting us at 1-800-869-6397.

Additional Information Phone Number

1-800-869-6397

Additional Information Website

Expenses [Text Block]

What were the Fund costs for the last six months?

(based on a hypothetical $10,000 investment)

Table Summary
Class Name	Costs of a $10,000 investment	Costs paid as a percentage of a $10,000 investment
Class I	$40	0.80%^{Footnote Reference1}

Footnote	Description
Footnote¹	Annualized

Expenses Paid, Amount

$ 40

Expense Ratio, Percent

0.80%

^[105]

AssetsNet

$ 417,503,666

Holdings Count | Holding

InvestmentCompanyPortfolioTurnover

29.00%

Additional Fund Statistics [Text Block]

Key Fund Statistics

Table Summary
Total Net Assets	$417,503,666
# of Portfolio Holdings	33
Portfolio Turnover Rate	29%

Holdings [Text Block]

Sector Allocation (% of total investments)

Table Summary
Value	Value
Short-Term Investments	0.0%^{Footnote Reference†}
Real Estate	1.1%
Materials	1.8%
Consumer Staples	1.9%
Energy	4.3%
Health Care	4.9%
Industrials	7.3%
Consumer Discretionary	10.2%
Communication Services	13.2%
Financials	16.0%
Information Technology	39.3%

Footnote	Description
Footnote^†	Amount is less than 0.05%

Largest Holdings [Text Block]

Top Ten Holdings (% of total investments)^{Footnote Referencea}

Table Summary
Alphabet, Inc.	11.9%
NVIDIA Corp.	11.7%
Apple, Inc.	10.4%
JPMorgan Chase & Co.	6.3%
General Electric Co.	5.6%
Amazon.com, Inc.	5.4%
Eli Lilly & Co.	4.9%
Micron Technology, Inc.	4.6%
Microsoft Corp.	4.5%
Jabil, Inc.	3.3%
Total	68.6%

Footnote	Description
Footnote^a	Excluding cash equivalents.

Updated Prospectus Web Address

C000169223

Shareholder Report [Line Items]

Fund Name

Morgan Stanley Institutional Fund, Inc. - US Core Portfolio

Class Name

Class R6

Trading Symbol

MUOSX

Annual or Semi-Annual Statement [Text Block]

This semi-annual shareholder report contains important information about Morgan Stanley Institutional Fund, Inc. - US Core Portfolio for the period of January 1, 2026 to June 30, 2026.

Additional Information [Text Block]

You can find additional information about the Fund at www.morganstanley.com/im/shareholderreports. You can also request this information by contacting us at 1-800-869-6397.

Additional Information Phone Number

1-800-869-6397

Additional Information Website

Expenses [Text Block]

What were the Fund costs for the last six months?

(based on a hypothetical $10,000 investment)

Table Summary
Class Name	Costs of a $10,000 investment	Costs paid as a percentage of a $10,000 investment
Class R6	$38	0.75%^{Footnote Reference1}

Footnote	Description
Footnote¹	Annualized

Expenses Paid, Amount

$ 38

Expense Ratio, Percent

0.75%

^[106]

AssetsNet

$ 417,503,666

Holdings Count | Holding

InvestmentCompanyPortfolioTurnover

29.00%

Additional Fund Statistics [Text Block]

Key Fund Statistics

Table Summary
Total Net Assets	$417,503,666
# of Portfolio Holdings	33
Portfolio Turnover Rate	29%

Holdings [Text Block]

Sector Allocation (% of total investments)

Table Summary
Value	Value
Short-Term Investments	0.0%^{Footnote Reference†}
Real Estate	1.1%
Materials	1.8%
Consumer Staples	1.9%
Energy	4.3%
Health Care	4.9%
Industrials	7.3%
Consumer Discretionary	10.2%
Communication Services	13.2%
Financials	16.0%
Information Technology	39.3%

Footnote	Description
Footnote^†	Amount is less than 0.05%

Largest Holdings [Text Block]

Top Ten Holdings (% of total investments)^{Footnote Referencea}

Table Summary
Alphabet, Inc.	11.9%
NVIDIA Corp.	11.7%
Apple, Inc.	10.4%
JPMorgan Chase & Co.	6.3%
General Electric Co.	5.6%
Amazon.com, Inc.	5.4%
Eli Lilly & Co.	4.9%
Micron Technology, Inc.	4.6%
Microsoft Corp.	4.5%
Jabil, Inc.	3.3%
Total	68.6%

Footnote	Description
Footnote^a	Excluding cash equivalents.

Updated Prospectus Web Address

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What were the Fund costs for the last six months?

Key Fund Statistics

Sector Allocation (% of total investments)

Top Ten Holdings (% of total investments)Footnote Referencea

What were the Fund costs for the last six months?

Key Fund Statistics

Sector Allocation (% of total investments)

Top Ten Holdings (% of total investments)Footnote Referencea

What were the Fund costs for the last six months?

Key Fund Statistics

Sector Allocation (% of total investments)

Top Ten Holdings (% of total investments)Footnote Referencea

What were the Fund costs for the last six months?

Key Fund Statistics

Sector Allocation (% of total investments)

Top Ten Holdings (% of total investments)Footnote Referencea

What were the Fund costs for the last six months?

Key Fund Statistics

Sector Allocation (% of total investments)

Top Ten Holdings (% of total investments)Footnote Referencea

What were the Fund costs for the last six months?

Key Fund Statistics

Country Allocation (% of total investments)

Top Ten Holdings (% of total investments)Footnote Referencea

What were the Fund costs for the last six months?

Key Fund Statistics

Country Allocation (% of total investments)

Top Ten Holdings (% of total investments)Footnote Referencea

What were the Fund costs for the last six months?

Key Fund Statistics

Country Allocation (% of total investments)

Top Ten Holdings (% of total investments)Footnote Referencea

What were the Fund costs for the last six months?

Key Fund Statistics

Country Allocation (% of total investments)

Top Ten Holdings (% of total investments)Footnote Referencea

What were the Fund costs for the last six months?

Key Fund Statistics

Country Allocation (% of total investments)

Top Ten Holdings (% of total investments)Footnote Referencea

What were the Fund costs for the last six months?

Key Fund Statistics

Country Allocation (% of total investments)

Top Ten Holdings (% of total investments)Footnote Referencea

What were the Fund costs for the last six months?

Key Fund Statistics

Country Allocation (% of total investments)

Top Ten Holdings (% of total investments)Footnote Referencea

What were the Fund costs for the last six months?

Key Fund Statistics

Country Allocation (% of total investments)

Top Ten Holdings (% of total investments)Footnote Referencea

What were the Fund costs for the last six months?

Key Fund Statistics

Country Allocation (% of total investments)

Top Ten Holdings (% of total investments)Footnote Referencea

What were the Fund costs for the last six months?

Key Fund Statistics

Country Allocation (% of total investments)

Top Ten Holdings (% of total investments)Footnote Referencea

What were the Fund costs for the last six months?

Key Fund Statistics

Country Allocation (% of total investments)

Top Ten Holdings (% of total investments)Footnote Referencea

What were the Fund costs for the last six months?

Key Fund Statistics

Country Allocation (% of total investments)

Top Ten Holdings (% of total investments)Footnote Referencea

What were the Fund costs for the last six months?

Key Fund Statistics

Country Allocation (% of total investments)

Top Ten Holdings (% of total investments)Footnote Referencea

What were the Fund costs for the last six months?

Key Fund Statistics

Country Allocation (% of total investments)

Top Ten Holdings (% of total investments)Footnote Referencea

What were the Fund costs for the last six months?

Key Fund Statistics

Country Allocation (% of total investments)

Top Ten Holdings (% of total investments)Footnote Referencea

Top Ten Holdings (% of total investments)^{Footnote Referencea}

Top Ten Holdings (% of total investments)^{Footnote Referencea}

Top Ten Holdings (% of total investments)^{Footnote Referencea}

Top Ten Holdings (% of total investments)^{Footnote Referencea}

Top Ten Holdings (% of total investments)^{Footnote Referencea}

Top Ten Holdings (% of total investments)^{Footnote Referencea}

Top Ten Holdings (% of total investments)^{Footnote Referencea}

Top Ten Holdings (% of total investments)^{Footnote Referencea}

Top Ten Holdings (% of total investments)^{Footnote Referencea}

Top Ten Holdings (% of total investments)^{Footnote Referencea}

Top Ten Holdings (% of total investments)^{Footnote Referencea}

Top Ten Holdings (% of total investments)^{Footnote Referencea}

Top Ten Holdings (% of total investments)^{Footnote Referencea}

Top Ten Holdings (% of total investments)^{Footnote Referencea}

Top Ten Holdings (% of total investments)^{Footnote Referencea}

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Top Ten Holdings (% of total investments)^{Footnote Referencea}

Top Ten Holdings (% of total investments)^{Footnote Referencea}

Top Ten Holdings (% of total investments)^{Footnote Referencea}

Top Ten Holdings (% of total investments)^{Footnote Referencea}

Top Ten Holdings (% of total investments)^{Footnote Referencea}

Top Ten Holdings (% of total investments)^{Footnote Referencea}

Top Ten Holdings (% of total investments)^{Footnote Referencea}

Top Ten Holdings (% of total investments)^{Footnote Referencea}

Top Ten Holdings (% of total investments)^{Footnote Referencea}

Top Ten Holdings (% of total investments)^{Footnote Referencea}

Top Ten Holdings (% of total investments)^{Footnote Referencea}