v3.26.1
Shareholder Report
6 Months Ended
Jun. 30, 2026
USD ($)
Holding
Shareholder Report [Line Items]  
Document Type N-CSRS
Amendment Flag false
Registrant Name Morgan Stanley Variable Insurance Fund, Inc.
Entity Central Index Key 0001011378
Entity Investment Company Type N-1A
Document Period End Date Jun. 30, 2026
Shareholder Report Annual or Semi-Annual Semi-Annual Shareholder Report
C000011741  
Shareholder Report [Line Items]  
Fund Name Morgan Stanley Variable Insurance Fund, Inc. - Discovery Portfolio
Class Name Class I
Trading Symbol MMGPX
Annual or Semi-Annual Statement [Text Block] This semi-annual shareholder report contains important information about Morgan Stanley Variable Insurance Fund, Inc. - Discovery 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 monthsFootnote Reference1?

(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
0.94%Footnote Reference2
FootnoteDescription
Footnote1
Does not reflect fees and expenses imposed by your insurance company. You may pay fees other than the fees and expenses of the Fund, such as brokerage commissions and other fees charged by financial intermediaries.
Footnote2
Annualized
Expenses Paid, Amount $ 47
Expense Ratio, Percent 0.94% [1]
AssetsNet $ 191,165,379
Holdings Count | Holding 39
InvestmentCompanyPortfolioTurnover 33.00%
Additional Fund Statistics [Text Block]

Key Fund Statistics

Table Summary
Total Net Assets
$191,165,379
# of Portfolio Holdings
39
Portfolio Turnover Rate
33%
Holdings [Text Block]

Sector Allocation (% of total investments)

Group By Country Chart
Table Summary
Value
Value
Consumer Discretionary
2.6%
Consumer Staples
2.9%
Real Estate
3.5%
Short-Term Investments
3.9%
Communication Services
4.3%
Industrials
10.8%
Financials
11.7%
Health Care
21.8%
Information Technology
38.5%
Largest Holdings [Text Block]

Top Ten Holdings (% of total investments)Footnote Referencea

Table Summary
Cloudflare, Inc.
13.6%
Royalty Pharma PLC
8.7%
Affirm Holdings, Inc.
7.2%
Aurora Innovation, Inc.
6.8%
IonQ, Inc.
5.9%
Roivant Sciences Ltd.
5.4%
QXO, Inc.
4.6%
Databricks, Inc.
4.3%
ROBLOX Corp.
4.0%
Opendoor Technologies, Inc.
3.5%
Total
64.0%
FootnoteDescription
Footnotea
Excluding cash equivalents.
Updated Prospectus Web Address <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>
C000011740  
Shareholder Report [Line Items]  
Fund Name Morgan Stanley Variable Insurance Fund, Inc. - Discovery Portfolio
Class Name Class II
Trading Symbol MMGTX
Annual or Semi-Annual Statement [Text Block] This semi-annual shareholder report contains important information about Morgan Stanley Variable Insurance Fund, Inc. - Discovery 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 monthsFootnote Reference1?

(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 II
$52
1.04%Footnote Reference2
FootnoteDescription
Footnote1
Does not reflect fees and expenses imposed by your insurance company. You may pay fees other than the fees and expenses of the Fund, such as brokerage commissions and other fees charged by financial intermediaries.
Footnote2
Annualized
Expenses Paid, Amount $ 52
Expense Ratio, Percent 1.04% [2]
AssetsNet $ 191,165,379
Holdings Count | Holding 39
InvestmentCompanyPortfolioTurnover 33.00%
Additional Fund Statistics [Text Block]

Key Fund Statistics

Table Summary
Total Net Assets
$191,165,379
# of Portfolio Holdings
39
Portfolio Turnover Rate
33%
Holdings [Text Block]

Sector Allocation (% of total investments)

Group By Country Chart
Table Summary
Value
Value
Consumer Discretionary
2.6%
Consumer Staples
2.9%
Real Estate
3.5%
Short-Term Investments
3.9%
Communication Services
4.3%
Industrials
10.8%
Financials
11.7%
Health Care
21.8%
Information Technology
38.5%
Largest Holdings [Text Block]

Top Ten Holdings (% of total investments)Footnote Referencea

Table Summary
Cloudflare, Inc.
13.6%
Royalty Pharma PLC
8.7%
Affirm Holdings, Inc.
7.2%
Aurora Innovation, Inc.
6.8%
IonQ, Inc.
5.9%
Roivant Sciences Ltd.
5.4%
QXO, Inc.
4.6%
Databricks, Inc.
4.3%
ROBLOX Corp.
4.0%
Opendoor Technologies, Inc.
3.5%
Total
64.0%
FootnoteDescription
Footnotea
Excluding cash equivalents.
Updated Prospectus Web Address <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>
C000011754  
Shareholder Report [Line Items]  
Fund Name Morgan Stanley Variable Insurance Fund, Inc. - Emerging Markets Equity Portfolio
Class Name Class I
Trading Symbol MEMEX
Annual or Semi-Annual Statement [Text Block] This semi-annual shareholder report contains important information about Morgan Stanley Variable Insurance Fund, Inc. - Emerging Markets 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 <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 monthsFootnote Reference1?

(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
$71
1.23%Footnote Reference2
FootnoteDescription
Footnote1
Does not reflect fees and expenses imposed by your insurance company. You may pay fees other than the fees and expenses of the Fund, such as brokerage commissions and other fees charged by financial intermediaries.
Footnote2
Annualized
Expenses Paid, Amount $ 71
Expense Ratio, Percent 1.23% [3]
AssetsNet $ 240,082,864
Holdings Count | Holding 82
InvestmentCompanyPortfolioTurnover 17.00%
Additional Fund Statistics [Text Block]

Key Fund Statistics

Table Summary
Total Net Assets
$240,082,864
# of Portfolio Holdings
82
Portfolio Turnover Rate
17%
Holdings [Text Block]

Country Allocation (% of total investments)

Group By Country Chart
Table Summary
Value
Value
Other
4.1%
Hungary
1.5%
Mexico
2.3%
United States
2.4%
Poland
2.8%
South Africa
4.2%
Brazil
4.3%
India
12.0%
China
12.9%
Korea, Republic of
24.7%
Taiwan
28.8%
Largest Holdings [Text Block]

Top Ten Holdings (% of total investments)Footnote Referencea

Table Summary
Taiwan Semiconductor Manufacturing Co. Ltd.
17.5%
Samsung Electronics Co. Ltd.
13.2%
SK Hynix, Inc.
4.9%
SK Square Co. Ltd.
3.8%
Tencent Holdings Ltd.
3.1%
MediaTek, Inc.
2.9%
Delta Electronics, Inc.
2.0%
Alibaba Group Holding Ltd.
1.8%
ASE Technology Holding Co. Ltd.
1.5%
Unimicron Technology Corp.
1.4%
Total
52.1%
FootnoteDescription
Footnotea
Excluding cash equivalents.
Updated Prospectus Web Address <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>
C000011753  
Shareholder Report [Line Items]  
Fund Name Morgan Stanley Variable Insurance Fund, Inc. - Emerging Markets Equity Portfolio
Class Name Class II
Trading Symbol MSMBX
Annual or Semi-Annual Statement [Text Block] This semi-annual shareholder report contains important information about Morgan Stanley Variable Insurance Fund, Inc. - Emerging Markets 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 <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 monthsFootnote Reference1?

(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 II
$73
1.28%Footnote Reference2
FootnoteDescription
Footnote1
Does not reflect fees and expenses imposed by your insurance company. You may pay fees other than the fees and expenses of the Fund, such as brokerage commissions and other fees charged by financial intermediaries.
Footnote2
Annualized
Expenses Paid, Amount $ 73
Expense Ratio, Percent 1.28% [4]
AssetsNet $ 240,082,864
Holdings Count | Holding 82
InvestmentCompanyPortfolioTurnover 17.00%
Additional Fund Statistics [Text Block]

Key Fund Statistics

Table Summary
Total Net Assets
$240,082,864
# of Portfolio Holdings
82
Portfolio Turnover Rate
17%
Holdings [Text Block]

Country Allocation (% of total investments)

Group By Country Chart
Table Summary
Value
Value
Other
4.1%
Hungary
1.5%
Mexico
2.3%
United States
2.4%
Poland
2.8%
South Africa
4.2%
Brazil
4.3%
India
12.0%
China
12.9%
Korea, Republic of
24.7%
Taiwan
28.8%
Largest Holdings [Text Block]

Top Ten Holdings (% of total investments)Footnote Referencea

Table Summary
Taiwan Semiconductor Manufacturing Co. Ltd.
17.5%
Samsung Electronics Co. Ltd.
13.2%
SK Hynix, Inc.
4.9%
SK Square Co. Ltd.
3.8%
Tencent Holdings Ltd.
3.1%
MediaTek, Inc.
2.9%
Delta Electronics, Inc.
2.0%
Alibaba Group Holding Ltd.
1.8%
ASE Technology Holding Co. Ltd.
1.5%
Unimicron Technology Corp.
1.4%
Total
52.1%
FootnoteDescription
Footnotea
Excluding cash equivalents.
Updated Prospectus Web Address <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>
C000011764  
Shareholder Report [Line Items]  
Fund Name Morgan Stanley Variable Insurance Fund, Inc. - Global Strategist Portfolio
Class Name Class I
Trading Symbol MIMPX
Annual or Semi-Annual Statement [Text Block] This semi-annual shareholder report contains important information about Morgan Stanley Variable Insurance Fund, Inc. - Global Strategist 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 monthsFootnote Reference1?

(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
$46
0.89%Footnote Reference2
FootnoteDescription
Footnote1
Does not reflect fees and expenses imposed by your insurance company. You may pay fees other than the fees and expenses of the Fund, such as brokerage commissions and other fees charged by financial intermediaries.
Footnote2
Annualized
Expenses Paid, Amount $ 46
Expense Ratio, Percent 0.89% [5]
AssetsNet $ 82,387,014
Holdings Count | Holding 1,398
InvestmentCompanyPortfolioTurnover 29.00%
Additional Fund Statistics [Text Block]

Key Fund Statistics

Table Summary
Total Net Assets
$82,387,014
# of Portfolio Holdings
1,398
Portfolio Turnover Rate
29%
Holdings [Text Block]

Geographic Allocation (% of total investments)

Group By Asset Type Chart
Table Summary
Value
Value
Africa
0.1%
Multi National
0.7%
Oceania
2.2%
South America
2.7%
Asia
8.5%
Europe
19.4%
North America
66.4%
Credit Quality Explanation [Text Block]

Asset Allocation (% of total investments)

Credit Rating Chart
Table Summary
Value
Value
Rights
0.0%Footnote Reference
Commercial Mortgage-Backed Securities
0.6%
Supranational
0.8%
Asset-Backed Securities
0.9%
Mortgages - Other
1.3%
Agency Fixed Rate Mortgages
3.6%
Corporate Bonds
6.7%
U.S. Treasury Securities
7.2%
Short-Term Investments
8.0%
Sovereign
21.3%
Common Stocks
49.6%
FootnoteDescription
Footnote
Amount is less than 0.05%
Material Fund Change [Text Block]
Updated Prospectus Web Address <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>
C000097939  
Shareholder Report [Line Items]  
Fund Name Morgan Stanley Variable Insurance Fund, Inc. - Global Strategist Portfolio
Class Name Class II
Trading Symbol MGTPX
Annual or Semi-Annual Statement [Text Block] This semi-annual shareholder report contains important information about Morgan Stanley Variable Insurance Fund, Inc. - Global Strategist 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 monthsFootnote Reference1?

(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 II
$51
0.99%Footnote Reference2
FootnoteDescription
Footnote1
Does not reflect fees and expenses imposed by your insurance company. You may pay fees other than the fees and expenses of the Fund, such as brokerage commissions and other fees charged by financial intermediaries.
Footnote2
Annualized
Expenses Paid, Amount $ 51
Expense Ratio, Percent 0.99% [6]
AssetsNet $ 82,387,014
Holdings Count | Holding 1,398
InvestmentCompanyPortfolioTurnover 29.00%
Additional Fund Statistics [Text Block]

Key Fund Statistics

Table Summary
Total Net Assets
$82,387,014
# of Portfolio Holdings
1,398
Portfolio Turnover Rate
29%
Holdings [Text Block]

Geographic Allocation (% of total investments)

Group By Asset Type Chart
Table Summary
Value
Value
Africa
0.1%
Multi National
0.7%
Oceania
2.2%
South America
2.7%
Asia
8.5%
Europe
19.4%
North America
66.4%
Credit Quality Explanation [Text Block]

Asset Allocation (% of total investments)

Credit Rating Chart
Table Summary
Value
Value
Rights
0.0%Footnote Reference
Commercial Mortgage-Backed Securities
0.6%
Supranational
0.8%
Asset-Backed Securities
0.9%
Mortgages - Other
1.3%
Agency Fixed Rate Mortgages
3.6%
Corporate Bonds
6.7%
U.S. Treasury Securities
7.2%
Short-Term Investments
8.0%
Sovereign
21.3%
Common Stocks
49.6%
FootnoteDescription
Footnote
Amount is less than 0.05%
Material Fund Change [Text Block]
Updated Prospectus Web Address <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>
C000011757  
Shareholder Report [Line Items]  
Fund Name Morgan Stanley Variable Insurance Fund, Inc. - Growth Portfolio
Class Name Class I
Trading Symbol MEGIX
Annual or Semi-Annual Statement [Text Block] This semi-annual shareholder report contains important information about Morgan Stanley Variable Insurance 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 <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 monthsFootnote Reference1?

(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
$27
0.56%Footnote Reference2
FootnoteDescription
Footnote1
Does not reflect fees and expenses imposed by your insurance company. You may pay fees other than the fees and expenses of the Fund, such as brokerage commissions and other fees charged by financial intermediaries.
Footnote2
Annualized
Expenses Paid, Amount $ 27
Expense Ratio, Percent 0.56% [7]
AssetsNet $ 569,656,420
Holdings Count | Holding 28
InvestmentCompanyPortfolioTurnover 17.00%
Additional Fund Statistics [Text Block]

Key Fund Statistics

Table Summary
Total Net Assets
$569,656,420
# of Portfolio Holdings
28
Portfolio Turnover Rate
17%
Holdings [Text Block]

Sector Allocation (% of total investments)

Group By Country Chart
Table Summary
Value
Value
Real Estate
0.6%
Short-Term Investments
1.0%
Industrials
4.7%
Communication Services
8.8%
Financials
10.9%
Consumer Discretionary
14.9%
Health Care
16.1%
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.
6.9%
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.
4.6%
Total
67.5%
FootnoteDescription
Footnotea
Excluding cash equivalents.
Updated Prospectus Web Address <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>
C000011758  
Shareholder Report [Line Items]  
Fund Name Morgan Stanley Variable Insurance Fund, Inc. - Growth Portfolio
Class Name Class II
Trading Symbol MEGTX
Annual or Semi-Annual Statement [Text Block] This semi-annual shareholder report contains important information about Morgan Stanley Variable Insurance 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 <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 monthsFootnote Reference1?

(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 II
$40
0.81%Footnote Reference2
FootnoteDescription
Footnote1
Does not reflect fees and expenses imposed by your insurance company. You may pay fees other than the fees and expenses of the Fund, such as brokerage commissions and other fees charged by financial intermediaries.
Footnote2
Annualized
Expenses Paid, Amount $ 40
Expense Ratio, Percent 0.81% [8]
AssetsNet $ 569,656,420
Holdings Count | Holding 28
InvestmentCompanyPortfolioTurnover 17.00%
Additional Fund Statistics [Text Block]

Key Fund Statistics

Table Summary
Total Net Assets
$569,656,420
# of Portfolio Holdings
28
Portfolio Turnover Rate
17%
Holdings [Text Block]

Sector Allocation (% of total investments)

Group By Country Chart
Table Summary
Value
Value
Real Estate
0.6%
Short-Term Investments
1.0%
Industrials
4.7%
Communication Services
8.8%
Financials
10.9%
Consumer Discretionary
14.9%
Health Care
16.1%
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.
6.9%
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.
4.6%
Total
67.5%
FootnoteDescription
Footnotea
Excluding cash equivalents.
Updated Prospectus Web Address <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>
C000011752  
Shareholder Report [Line Items]  
Fund Name Morgan Stanley Variable Insurance Fund, Inc. - Emerging Markets Debt Portfolio
Class Name Class I
Trading Symbol MEMNX
Annual or Semi-Annual Statement [Text Block] This semi-annual shareholder report contains important information about Morgan Stanley Variable Insurance Fund, Inc. - Emerging Markets Debt 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 monthsFootnote Reference1?

(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
$55
1.09%Footnote Reference2
FootnoteDescription
Footnote1
Does not reflect fees and expenses imposed by your insurance company. You may pay fees other than the fees and expenses of the Fund, such as brokerage commissions and other fees charged by financial intermediaries.
Footnote2
Annualized
Expenses Paid, Amount $ 55
Expense Ratio, Percent 1.09% [9]
AssetsNet $ 116,640,862
Holdings Count | Holding 309
InvestmentCompanyPortfolioTurnover 52.00%
Additional Fund Statistics [Text Block]

Key Fund Statistics

Table Summary
Total Net Assets
$116,640,862
# of Portfolio Holdings
309
Portfolio Turnover Rate
52%
Holdings [Text Block]

Credit Quality (% of net assets)Footnote Reference*

Group By Asset Type Chart
Table Summary
Value
Value
Cash and Equivalents
3.5%
Not Rated
8.9%
D
1.2%
CC
2.7%
CCC
11.4%
B
33.4%
BB
15.3%
BBB
19.4%
A
3.9%
AA
0.3%
FootnoteDescription
Footnote*
Security ratings disclosed with the exception for those labeled “not rated” is an aggregation of the highest security level rating amongst S&P Global Ratings, Moody’s Investors Services, Inc., and Fitch Ratings, each a Nationally Recognized Statistical Ratings Organization (“NRSRO”).
Credit Quality Explanation [Text Block]

Asset Allocation (% of total investments)

Credit Rating Chart
Table Summary
Value
Value
Common Stocks
0.0%Footnote Reference
Warrants
0.0%Footnote Reference
Short-Term Investments
5.5%
Senior Loan Interests
5.0%
Corporate Bonds
20.4%
Sovereign
69.1%
FootnoteDescription
Footnote
Amount is less than 0.05%
Material Fund Change [Text Block]
Updated Prospectus Web Address <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>
C000011751  
Shareholder Report [Line Items]  
Fund Name Morgan Stanley Variable Insurance Fund, Inc. - Emerging Markets Debt Portfolio
Class Name Class II
Trading Symbol MBDBX
Annual or Semi-Annual Statement [Text Block] This semi-annual shareholder report contains important information about Morgan Stanley Variable Insurance Fund, Inc. - Emerging Markets Debt 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 monthsFootnote Reference1?

(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 II
$58
1.14%Footnote Reference2
FootnoteDescription
Footnote1
Does not reflect fees and expenses imposed by your insurance company. You may pay fees other than the fees and expenses of the Fund, such as brokerage commissions and other fees charged by financial intermediaries.
Footnote2
Annualized
Expenses Paid, Amount $ 58
Expense Ratio, Percent 1.14% [10]
AssetsNet $ 116,640,862
Holdings Count | Holding 309
InvestmentCompanyPortfolioTurnover 52.00%
Additional Fund Statistics [Text Block]

Key Fund Statistics

Table Summary
Total Net Assets
$116,640,862
# of Portfolio Holdings
309
Portfolio Turnover Rate
52%
Holdings [Text Block]

Credit Quality (% of net assets)Footnote Reference*

Group By Asset Type Chart
Table Summary
Value
Value
Cash and Equivalents
3.5%
Not Rated
8.9%
D
1.2%
CC
2.7%
CCC
11.4%
B
33.4%
BB
15.3%
BBB
19.4%
A
3.9%
AA
0.3%
FootnoteDescription
Footnote*
Security ratings disclosed with the exception for those labeled “not rated” is an aggregation of the highest security level rating amongst S&P Global Ratings, Moody’s Investors Services, Inc., and Fitch Ratings, each a Nationally Recognized Statistical Ratings Organization (“NRSRO”).
Credit Quality Explanation [Text Block]

Asset Allocation (% of total investments)

Credit Rating Chart
Table Summary
Value
Value
Common Stocks
0.0%Footnote Reference
Warrants
0.0%Footnote Reference
Short-Term Investments
5.5%
Senior Loan Interests
5.0%
Corporate Bonds
20.4%
Sovereign
69.1%
FootnoteDescription
Footnote
Amount is less than 0.05%
Material Fund Change [Text Block]
Updated Prospectus Web Address <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>
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