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 AB VARIABLE PRODUCTS SERIES FUND, INC.
Entity Central Index Key 0000825316
Entity Investment Company Type N-1A
Document Period End Date Jun. 30, 2026
Shareholder Report Annual or Semi-Annual Semi-Annual Shareholder Report
C000028838  
Shareholder Report [Line Items]  
Fund Name AB VPS Discovery Value Portfolio
Class Name Class A
No Trading Symbol [Flag] true
Annual or Semi-Annual Statement [Text Block] This semi-annual shareholder report contains important information about the AB VPS Discovery Value Portfolio (the “Portfolio”) for the period of January 1, 2026 to June 30, 2026.
Additional Information [Text Block] Portfolio
Additional Information Phone Number (800) 227 4618
Additional Information Website https://www.abfunds.com/link/AB/64VQ-A-S
Expenses [Text Block]

What were the Portfolio costs for the last six months?

(Based on a hypothetical $10,000 investment)

Table Summary
Class Name
Cost of a $10,000 investment
Costs paid as a percentage of a $10,000 investment
Class A
$44
0.80%Footnote Reference*
Footnote Description
Footnote*
Annualized
Expenses Paid, Amount $ 44
Expense Ratio, Percent 0.80% [1]
AssetsNet $ 768,406,213
Holdings Count | Holding 102
Advisory Fees Paid, Amount $ 2,685,784
InvestmentCompanyPortfolioTurnover 35.00%
Additional Fund Statistics [Text Block]

Key Portfolio Statistics

Table Summary
Net Assets
$768,406,213
# of Portfolio Holdings
102
Portfolio Turnover Rate
35%
Total Advisory Fees Paid (Net)
$2,685,784
Holdings [Text Block]

Sector Breakdown (% of Net Assets)

Table Summary
Industrials
23.3%
Financials
16.5%
Information Technology
12.8%
Consumer Discretionary
11.7%
Health Care
9.3%
Real Estate
6.9%
Materials
6.5%
Consumer Staples
5.7%
Utilities
3.5%
Energy
3.1%
Short-Term Investments
1.9%
Other assets less liabilities
-1.2%
Total
100.0%
Largest Holdings [Text Block]

10 Top Holdings

Table Summary
Company
U.S. $ Value
% of Net Assets
US Foods Holding Corp.
$12,969,799
1.7%
Hanover Insurance Group, Inc. (The)
$12,551,928
1.6%
BorgWarner, Inc.
$12,470,053
1.6%
Reliance, Inc.
$12,461,802
1.6%
Regal Rexnord Corp.
$11,970,000
1.6%
F5, Inc.
$11,808,272
1.5%
IDACORP, Inc.
$11,604,256
1.5%
UMB Financial Corp.
$11,356,986
1.5%
Tenet Healthcare Corp.
$11,088,231
1.5%
Everest Group Ltd.
$11,078,060
1.4%
Total
$119,359,387
15.5%
Material Fund Change [Text Block]
C000028839  
Shareholder Report [Line Items]  
Fund Name AB VPS Discovery Value Portfolio
Class Name Class B
No Trading Symbol [Flag] true
Annual or Semi-Annual Statement [Text Block] This semi-annual shareholder report contains important information about the AB VPS Discovery Value Portfolio (the “Portfolio”) for the period of January 1, 2026 to June 30, 2026.
Additional Information [Text Block] Portfolio
Additional Information Phone Number (800) 227 4618
Additional Information Website https://www.abfunds.com/link/AB/64VQ-B-S
Expenses [Text Block]

What were the Portfolio costs for the last six months?

(Based on a hypothetical $10,000 investment)

Table Summary
Class Name
Cost of a $10,000 investment
Costs paid as a percentage of a $10,000 investment
Class B
$57
1.05%Footnote Reference*
Footnote Description
Footnote*
Annualized
Expenses Paid, Amount $ 57
Expense Ratio, Percent 1.05% [2]
AssetsNet $ 768,406,213
Holdings Count | Holding 102
Advisory Fees Paid, Amount $ 2,685,784
InvestmentCompanyPortfolioTurnover 35.00%
Additional Fund Statistics [Text Block]

Key Portfolio Statistics

Table Summary
Net Assets
$768,406,213
# of Portfolio Holdings
102
Portfolio Turnover Rate
35%
Total Advisory Fees Paid (Net)
$2,685,784
Holdings [Text Block]

Sector Breakdown (% of Net Assets)

Table Summary
Industrials
23.3%
Financials
16.5%
Information Technology
12.8%
Consumer Discretionary
11.7%
Health Care
9.3%
Real Estate
6.9%
Materials
6.5%
Consumer Staples
5.7%
Utilities
3.5%
Energy
3.1%
Short-Term Investments
1.9%
Other assets less liabilities
-1.2%
Total
100.0%
Largest Holdings [Text Block]

10 Top Holdings

Table Summary
Company
U.S. $ Value
% of Net Assets
US Foods Holding Corp.
$12,969,799
1.7%
Hanover Insurance Group, Inc. (The)
$12,551,928
1.6%
BorgWarner, Inc.
$12,470,053
1.6%
Reliance, Inc.
$12,461,802
1.6%
Regal Rexnord Corp.
$11,970,000
1.6%
F5, Inc.
$11,808,272
1.5%
IDACORP, Inc.
$11,604,256
1.5%
UMB Financial Corp.
$11,356,986
1.5%
Tenet Healthcare Corp.
$11,088,231
1.5%
Everest Group Ltd.
$11,078,060
1.4%
Total
$119,359,387
15.5%
Material Fund Change [Text Block]
C000098721  
Shareholder Report [Line Items]  
Fund Name AB VPS Dynamic Asset Allocation Portfolio
Class Name Class A
No Trading Symbol [Flag] true
Annual or Semi-Annual Statement [Text Block] This semi-annual shareholder report contains important information about the AB VPS Dynamic Asset Allocation Portfolio (the “Portfolio”) for the period of January 1, 2026 to June 30, 2026.
Additional Information [Text Block] Portfolio
Additional Information Phone Number (800) 227 4618
Additional Information Website https://www.abfunds.com/link/AB/64VD-A-S
Expenses [Text Block]

What were the Portfolio costs for the last six months?

(Based on a hypothetical $10,000 investment)

Table Summary
Class Name
Cost of a $10,000 investment
Costs paid as a percentage of a $10,000 investment
Class A
$43
0.85%Footnote Reference*
Footnote Description
Footnote*
Annualized
Expenses Paid, Amount $ 43
Expense Ratio, Percent 0.85% [3]
AssetsNet $ 238,983,900
Holdings Count | Holding 1,396
Advisory Fees Paid, Amount $ 764,317
InvestmentCompanyPortfolioTurnover 9.00%
Additional Fund Statistics [Text Block]

Key Portfolio Statistics

Table Summary
Net Assets
$238,983,900
# of Portfolio Holdings
1,396
Portfolio Turnover Rate
9%
Total Advisory Fees Paid (Net)
$764,317
Holdings [Text Block]

Security Type Breakdown (% of Net Assets)

Table Summary
Common Stocks
63.1%
Governments - Treasuries
34.1%
Agencies
0.7%
Purchased Options - Puts
0.5%
Rights
0.0%
Warrants
0.0%
Short-Term Investments
0.7%
Other assets less liabilities
0.9%
Total
100.0%
Largest Holdings [Text Block]

10 Top Holdings

Table Summary
Company
U.S. $ Value
% of Net Assets
NVIDIA Corp.
$7,810,113
3.3%
Apple, Inc.
$7,183,073
3.0%
U.S. Treasury Notes, 2.25%, due 11/15/27
$5,290,587
2.2%
Microsoft Corp.
$4,449,383
1.8%
Amazon.com, Inc.
$3,900,434
1.6%
Alphabet, Inc. - Class A
$3,517,950
1.5%
Broadcom, Inc.
$2,872,789
1.2%
U.S. Treasury Notes, 1.00%, due 07/31/28
$2,785,920
1.2%
Alphabet, Inc. - Class C
$2,761,627
1.2%
U.S. Treasury Notes, 4.25%, due 03/31/33
$2,440,732
1.0%
Total
$43,012,608
18.0%
Material Fund Change [Text Block]
C000098722  
Shareholder Report [Line Items]  
Fund Name AB VPS Dynamic Asset Allocation Portfolio
Class Name Class B
No Trading Symbol [Flag] true
Annual or Semi-Annual Statement [Text Block] This semi-annual shareholder report contains important information about the AB VPS Dynamic Asset Allocation Portfolio (the “Portfolio”) for the period of January 1, 2026 to June 30, 2026.
Additional Information [Text Block] Portfolio
Additional Information Phone Number (800) 227 4618
Additional Information Website https://www.abfunds.com/link/AB/64VD-B-S
Expenses [Text Block]

What were the Portfolio costs for the last six months?

(Based on a hypothetical $10,000 investment)

Table Summary
Class Name
Cost of a $10,000 investment
Costs paid as a percentage of a $10,000 investment
Class B
$56
1.10%Footnote Reference*
Footnote Description
Footnote*
Annualized
Expenses Paid, Amount $ 56
Expense Ratio, Percent 1.10% [4]
AssetsNet $ 238,983,900
Holdings Count | Holding 1,396
Advisory Fees Paid, Amount $ 764,317
InvestmentCompanyPortfolioTurnover 9.00%
Additional Fund Statistics [Text Block]

Key Portfolio Statistics

Table Summary
Net Assets
$238,983,900
# of Portfolio Holdings
1,396
Portfolio Turnover Rate
9%
Total Advisory Fees Paid (Net)
$764,317
Holdings [Text Block]

Security Type Breakdown (% of Net Assets)

Table Summary
Common Stocks
63.1%
Governments - Treasuries
34.1%
Agencies
0.7%
Purchased Options - Puts
0.5%
Rights
0.0%
Warrants
0.0%
Short-Term Investments
0.7%
Other assets less liabilities
0.9%
Total
100.0%
Largest Holdings [Text Block]

10 Top Holdings

Table Summary
Company
U.S. $ Value
% of Net Assets
NVIDIA Corp.
$7,810,113
3.3%
Apple, Inc.
$7,183,073
3.0%
U.S. Treasury Notes, 2.25%, due 11/15/27
$5,290,587
2.2%
Microsoft Corp.
$4,449,383
1.8%
Amazon.com, Inc.
$3,900,434
1.6%
Alphabet, Inc. - Class A
$3,517,950
1.5%
Broadcom, Inc.
$2,872,789
1.2%
U.S. Treasury Notes, 1.00%, due 07/31/28
$2,785,920
1.2%
Alphabet, Inc. - Class C
$2,761,627
1.2%
U.S. Treasury Notes, 4.25%, due 03/31/33
$2,440,732
1.0%
Total
$43,012,608
18.0%
Material Fund Change [Text Block]
C000028862  
Shareholder Report [Line Items]  
Fund Name AB VPS Relative Value Portfolio
Class Name Class A
No Trading Symbol [Flag] true
Annual or Semi-Annual Statement [Text Block] This semi-annual shareholder report contains important information about the AB VPS Relative Value Portfolio (the “Portfolio”) for the period of January 1, 2026 to June 30, 2026.
Additional Information [Text Block] Portfolio
Additional Information Phone Number (800) 227 4618
Additional Information Website https://www.abfunds.com/link/AB/64VH-A-S
Expenses [Text Block]

What were the Portfolio costs for the last six months?

(Based on a hypothetical $10,000 investment)

Table Summary
Class Name
Cost of a $10,000 investment
Costs paid as a percentage of a $10,000 investment
Class A
$31
0.59%Footnote Reference*
Footnote Description
Footnote*
Annualized
Expenses Paid, Amount $ 31
Expense Ratio, Percent 0.59% [5]
AssetsNet $ 1,131,763,472
Holdings Count | Holding 80
Advisory Fees Paid, Amount $ 2,925,796
InvestmentCompanyPortfolioTurnover 32.00%
Additional Fund Statistics [Text Block]

Key Portfolio Statistics

Table Summary
Net Assets
$1,131,763,472
# of Portfolio Holdings
80
Portfolio Turnover Rate
32%
Total Advisory Fees Paid (Net)
$2,925,796
Holdings [Text Block]

Sector Breakdown (% of Net Assets)

Table Summary
Industrials
18.0%
Financials
16.3%
Information Technology
15.3%
Health Care
13.5%
Consumer Discretionary
8.6%
Consumer Staples
8.1%
Energy
6.8%
Communication Services
6.7%
Materials
1.9%
Real Estate
1.3%
Others
0.9%
Short-Term Investments
1.8%
Other assets less liabilities
0.8%
Total
100.0%
Largest Holdings [Text Block]

10 Top Holdings

Table Summary
Company
U.S. $ Value
% of Net Assets
Berkshire Hathaway, Inc. - Class B
$45,192,723
4.0%
RTX Corp.
$42,725,868
3.7%
JPMorgan Chase & Co.
$39,399,402
3.5%
Johnson & Johnson
$38,681,917
3.4%
Philip Morris International, Inc.
$35,316,165
3.1%
Alphabet, Inc. - Class C
$34,110,478
3.0%
Cisco Systems, Inc.
$33,702,798
3.0%
UnitedHealth Group, Inc.
$29,006,818
2.6%
Taiwan Semiconductor Manufacturing Co., Ltd. (Sponsored ADR)
$26,444,961
2.3%
Amazon.com, Inc.
$23,254,834
2.1%
Total
$347,835,964
30.7%
Material Fund Change [Text Block]
C000028863  
Shareholder Report [Line Items]  
Fund Name AB VPS Relative Value Portfolio
Class Name Class B
No Trading Symbol [Flag] true
Annual or Semi-Annual Statement [Text Block] This semi-annual shareholder report contains important information about the AB VPS Relative Value Portfolio (the “Portfolio”) for the period of January 1, 2026 to June 30, 2026.
Additional Information [Text Block] Portfolio
Additional Information Phone Number (800) 227 4618
Additional Information Website https://www.abfunds.com/link/AB/64VH-B-S
Expenses [Text Block]

What were the Portfolio costs for the last six months?

(Based on a hypothetical $10,000 investment)

Table Summary
Class Name
Cost of a $10,000 investment
Costs paid as a percentage of a $10,000 investment
Class B
$44
0.84%Footnote Reference*
Footnote Description
Footnote*
Annualized
Expenses Paid, Amount $ 44
Expense Ratio, Percent 0.84% [6]
AssetsNet $ 1,131,763,472
Holdings Count | Holding 80
Advisory Fees Paid, Amount $ 2,925,796
InvestmentCompanyPortfolioTurnover 32.00%
Additional Fund Statistics [Text Block]

Key Portfolio Statistics

Table Summary
Net Assets
$1,131,763,472
# of Portfolio Holdings
80
Portfolio Turnover Rate
32%
Total Advisory Fees Paid (Net)
$2,925,796
Holdings [Text Block]

Sector Breakdown (% of Net Assets)

Table Summary
Industrials
18.0%
Financials
16.3%
Information Technology
15.3%
Health Care
13.5%
Consumer Discretionary
8.6%
Consumer Staples
8.1%
Energy
6.8%
Communication Services
6.7%
Materials
1.9%
Real Estate
1.3%
Others
0.9%
Short-Term Investments
1.8%
Other assets less liabilities
0.8%
Total
100.0%
Largest Holdings [Text Block]

10 Top Holdings

Table Summary
Company
U.S. $ Value
% of Net Assets
Berkshire Hathaway, Inc. - Class B
$45,192,723
4.0%
RTX Corp.
$42,725,868
3.7%
JPMorgan Chase & Co.
$39,399,402
3.5%
Johnson & Johnson
$38,681,917
3.4%
Philip Morris International, Inc.
$35,316,165
3.1%
Alphabet, Inc. - Class C
$34,110,478
3.0%
Cisco Systems, Inc.
$33,702,798
3.0%
UnitedHealth Group, Inc.
$29,006,818
2.6%
Taiwan Semiconductor Manufacturing Co., Ltd. (Sponsored ADR)
$26,444,961
2.3%
Amazon.com, Inc.
$23,254,834
2.1%
Total
$347,835,964
30.7%
Material Fund Change [Text Block]
C000028852  
Shareholder Report [Line Items]  
Fund Name AB VPS Balanced Hedged Allocation Portfolio
Class Name Class A
No Trading Symbol [Flag] true
Annual or Semi-Annual Statement [Text Block] This semi-annual shareholder report contains important information about the AB VPS Balanced Hedged Allocation Portfolio (the “Portfolio”) for the period of January 1, 2026 to June 30, 2026.
Additional Information [Text Block] Portfolio
Additional Information Phone Number (800) 227 4618
Additional Information Website https://www.abfunds.com/link/AB/64VW-A-S
Expenses [Text Block]

What were the Portfolio costs for the last six months?

(Based on a hypothetical $10,000 investment)

Table Summary
Class Name
Cost of a $10,000 investment
Costs paid as a percentage of a $10,000 investment
Class A
$38
0.75%Footnote Reference*
Footnote Description
Footnote*
Annualized
Expenses Paid, Amount $ 38
Expense Ratio, Percent 0.75% [7]
AssetsNet $ 151,854,121
Holdings Count | Holding 15
Advisory Fees Paid, Amount $ 324,191
InvestmentCompanyPortfolioTurnover 0.00%
Additional Fund Statistics [Text Block]

Key Portfolio Statistics

Table Summary
Net Assets
$151,854,121
# of Portfolio Holdings
15
Portfolio Turnover Rate
0%
Total Advisory Fees Paid (Net)
$324,191
Holdings [Text Block]

Portfolio Breakdown (% of Net Assets)

Table Summary
Investment Companies
92.4%
Inflation-Linked Securities
3.5%
Purchased Options - Calls
2.9%
Purchased Options - Puts
1.0%
Common Stocks
0.0%
Short-Term Investments
0.0%
Other assets less liabilities
0.2%
Total
100.0%
Largest Holdings [Text Block]

10 Top Holdings

Table Summary
Company
U.S. $ Value
% of Net Assets
iShares Core S&P 500 ETF
$53,395,857
35.2%
iShares Core MSCI EAFE ETF
$23,130,910
15.2%
iShares Core U.S. Aggregate Bond ETF
$23,052,442
15.2%
Vanguard Total Bond Market ETF
$22,977,330
15.1%
iShares Core MSCI Emerging Markets ETF
$11,498,192
7.6%
U.S. Treasury Inflation Index, 0.13%, due 01/15/32
$5,299,515
3.5%
Purchased Options - Calls, S&P 500 Index, USD 6800.00, due 12/17/27
$4,313,920
2.8%
Vanguard Real Estate ETF
$3,124,332
2.1%
Vanguard Mid-Cap ETF
$3,077,774
2.0%
Purchased Options - Puts, S&P 500 Index, USD 6800.00, due 12/17/27
$1,226,184
0.8%
Total
$151,096,456
99.5%
Material Fund Change [Text Block]
C000028853  
Shareholder Report [Line Items]  
Fund Name AB VPS Balanced Hedged Allocation Portfolio
Class Name Class B
No Trading Symbol [Flag] true
Annual or Semi-Annual Statement [Text Block] This semi-annual shareholder report contains important information about the AB VPS Balanced Hedged Allocation Portfolio (the “Portfolio”) for the period of January 1, 2026 to June 30, 2026.
Additional Information [Text Block] Portfolio
Additional Information Phone Number (800) 227 4618
Additional Information Website https://www.abfunds.com/link/AB/64VW-B-S
Expenses [Text Block]

What were the Portfolio costs for the last six months?

(Based on a hypothetical $10,000 investment)

Table Summary
Class Name
Cost of a $10,000 investment
Costs paid as a percentage of a $10,000 investment
Class B
$51
1.00%Footnote Reference*
Footnote Description
Footnote*
Annualized
Expenses Paid, Amount $ 51
Expense Ratio, Percent 1.00% [8]
AssetsNet $ 151,854,121
Holdings Count | Holding 15
Advisory Fees Paid, Amount $ 324,191
InvestmentCompanyPortfolioTurnover 0.00%
Additional Fund Statistics [Text Block]

Key Portfolio Statistics

Table Summary
Net Assets
$151,854,121
# of Portfolio Holdings
15
Portfolio Turnover Rate
0%
Total Advisory Fees Paid (Net)
$324,191
Holdings [Text Block]

Portfolio Breakdown (% of Net Assets)

Table Summary
Investment Companies
92.4%
Inflation-Linked Securities
3.5%
Purchased Options - Calls
2.9%
Purchased Options - Puts
1.0%
Common Stocks
0.0%
Short-Term Investments
0.0%
Other assets less liabilities
0.2%
Total
100.0%
Largest Holdings [Text Block]

10 Top Holdings

Table Summary
Company
U.S. $ Value
% of Net Assets
iShares Core S&P 500 ETF
$53,395,857
35.2%
iShares Core MSCI EAFE ETF
$23,130,910
15.2%
iShares Core U.S. Aggregate Bond ETF
$23,052,442
15.2%
Vanguard Total Bond Market ETF
$22,977,330
15.1%
iShares Core MSCI Emerging Markets ETF
$11,498,192
7.6%
U.S. Treasury Inflation Index, 0.13%, due 01/15/32
$5,299,515
3.5%
Purchased Options - Calls, S&P 500 Index, USD 6800.00, due 12/17/27
$4,313,920
2.8%
Vanguard Real Estate ETF
$3,124,332
2.1%
Vanguard Mid-Cap ETF
$3,077,774
2.0%
Purchased Options - Puts, S&P 500 Index, USD 6800.00, due 12/17/27
$1,226,184
0.8%
Total
$151,096,456
99.5%
Material Fund Change [Text Block]
C000028828  
Shareholder Report [Line Items]  
Fund Name AB VPS International Value Portfolio
Class Name Class A
No Trading Symbol [Flag] true
Annual or Semi-Annual Statement [Text Block] This semi-annual shareholder report contains important information about the AB VPS International Value Portfolio (the “Portfolio”) for the period of January 1, 2026 to June 30, 2026.
Additional Information [Text Block] Portfolio
Additional Information Phone Number (800) 227 4618
Additional Information Website https://www.abfunds.com/link/AB/64VF-A-S
Expenses [Text Block]

What were the Portfolio costs for the last six months?

(Based on a hypothetical $10,000 investment)

Table Summary
Class Name
Cost of a $10,000 investment
Costs paid as a percentage of a $10,000 investment
Class A
$46
0.88%Footnote Reference*
Footnote Description
Footnote*
Annualized
Expenses Paid, Amount $ 46
Expense Ratio, Percent 0.88% [9]
AssetsNet $ 328,115,991
Holdings Count | Holding 65
Advisory Fees Paid, Amount $ 1,213,140
InvestmentCompanyPortfolioTurnover 23.00%
Additional Fund Statistics [Text Block]

Key Portfolio Statistics

Table Summary
Net Assets
$328,115,991
# of Portfolio Holdings
65
Portfolio Turnover Rate
23%
Total Advisory Fees Paid (Net)
$1,213,140
Holdings [Text Block]

Country Breakdown (% of Net Assets)

Table Summary
Japan
21.0%
United Kingdom
16.3%
France
12.1%
United States
9.1%
Italy
5.0%
Netherlands
4.5%
Denmark
3.6%
Spain
3.3%
Hong Kong
2.6%
Switzerland
2.6%
Germany
2.3%
Taiwan
2.1%
Belgium
1.9%
South Africa
1.8%
Others
9.4%
Short-Term Investments
2.1%
Other assets less liabilities
0.3%
Total
100.0%

Sector Breakdown (% of Net Assets)

Table Summary
Financials
23.4%
Industrials
18.7%
Health Care
10.1%
Consumer Discretionary
9.0%
Information Technology
8.8%
Consumer Staples
7.0%
Materials
6.3%
Communication Services
5.7%
Energy
4.3%
Real Estate
2.6%
Others
1.7%
Short-Term Investments
2.1%
Other assets less liabilities
0.3%
Total
100.0%
Largest Holdings [Text Block]

10 Top Holdings

Table Summary
Company
U.S. $ Value
% of Net Assets
Tokyo Electron Ltd.
$12,557,713
3.8%
Shell PLC
$10,349,799
3.2%
Roche Holding AG
$8,365,194
2.5%
Sony Group Corp.
$7,407,668
2.3%
Resona Holdings, Inc.
$7,319,550
2.2%
Taiwan Semiconductor Manufacturing Co., Ltd.
$6,784,562
2.1%
Airbus SE
$6,647,606
2.0%
Industria de Diseno Textil SA
$6,415,996
2.0%
Anheuser-Busch InBev SA/NV
$6,339,687
1.9%
Novo Nordisk A/S - Class B
$6,333,262
1.9%
Total
$78,521,037
23.9%
Material Fund Change [Text Block]
C000028829  
Shareholder Report [Line Items]  
Fund Name AB VPS International Value Portfolio
Class Name Class B
No Trading Symbol [Flag] true
Annual or Semi-Annual Statement [Text Block] This semi-annual shareholder report contains important information about the AB VPS International Value Portfolio (the “Portfolio”) for the period of January 1, 2026 to June 30, 2026.
Additional Information [Text Block] Portfolio
Additional Information Phone Number (800) 227 4618
Additional Information Website https://www.abfunds.com/link/AB/64VF-B-S
Expenses [Text Block]

What were the Portfolio costs for the last six months?

(Based on a hypothetical $10,000 investment)

Table Summary
Class Name
Cost of a $10,000 investment
Costs paid as a percentage of a $10,000 investment
Class B
$59
1.13%Footnote Reference*
Footnote Description
Footnote*
Annualized
Expenses Paid, Amount $ 59
Expense Ratio, Percent 1.13% [10]
AssetsNet $ 328,115,991
Holdings Count | Holding 65
Advisory Fees Paid, Amount $ 1,213,140
InvestmentCompanyPortfolioTurnover 23.00%
Additional Fund Statistics [Text Block]

Key Portfolio Statistics

Table Summary
Net Assets
$328,115,991
# of Portfolio Holdings
65
Portfolio Turnover Rate
23%
Total Advisory Fees Paid (Net)
$1,213,140
Holdings [Text Block]

Country Breakdown (% of Net Assets)

Table Summary
Japan
21.0%
United Kingdom
16.3%
France
12.1%
United States
9.1%
Italy
5.0%
Netherlands
4.5%
Denmark
3.6%
Spain
3.3%
Hong Kong
2.6%
Switzerland
2.6%
Germany
2.3%
Taiwan
2.1%
Belgium
1.9%
South Africa
1.8%
Others
9.4%
Short-Term Investments
2.1%
Other assets less liabilities
0.3%
Total
100.0%

Sector Breakdown (% of Net Assets)

Table Summary
Financials
23.4%
Industrials
18.7%
Health Care
10.1%
Consumer Discretionary
9.0%
Information Technology
8.8%
Consumer Staples
7.0%
Materials
6.3%
Communication Services
5.7%
Energy
4.3%
Real Estate
2.6%
Others
1.7%
Short-Term Investments
2.1%
Other assets less liabilities
0.3%
Total
100.0%
Largest Holdings [Text Block]

10 Top Holdings

Table Summary
Company
U.S. $ Value
% of Net Assets
Tokyo Electron Ltd.
$12,557,713
3.8%
Shell PLC
$10,349,799
3.2%
Roche Holding AG
$8,365,194
2.5%
Sony Group Corp.
$7,407,668
2.3%
Resona Holdings, Inc.
$7,319,550
2.2%
Taiwan Semiconductor Manufacturing Co., Ltd.
$6,784,562
2.1%
Airbus SE
$6,647,606
2.0%
Industria de Diseno Textil SA
$6,415,996
2.0%
Anheuser-Busch InBev SA/NV
$6,339,687
1.9%
Novo Nordisk A/S - Class B
$6,333,262
1.9%
Total
$78,521,037
23.9%
Material Fund Change [Text Block]
C000028830  
Shareholder Report [Line Items]  
Fund Name AB VPS Large Cap Growth Portfolio
Class Name Class A
No Trading Symbol [Flag] true
Annual or Semi-Annual Statement [Text Block] This semi-annual shareholder report contains important information about the AB VPS Large Cap Growth Portfolio (the “Portfolio”) for the period of January 1, 2026 to June 30, 2026.
Additional Information [Text Block] Portfolio
Additional Information Phone Number (800) 227 4618
Additional Information Website https://www.abfunds.com/link/AB/64VL-A-S
Expenses [Text Block]

What were the Portfolio costs for the last six months?

(Based on a hypothetical $10,000 investment)

Table Summary
Class Name
Cost of a $10,000 investment
Costs paid as a percentage of a $10,000 investment
Class A
$32
0.64%Footnote Reference*
Footnote Description
Footnote*
Annualized
Expenses Paid, Amount $ 32
Expense Ratio, Percent 0.64% [11]
AssetsNet $ 1,038,275,945
Holdings Count | Holding 63
Advisory Fees Paid, Amount $ 2,968,864
InvestmentCompanyPortfolioTurnover 12.00%
Additional Fund Statistics [Text Block]

Key Portfolio Statistics

Table Summary
Net Assets
$1,038,275,945
# of Portfolio Holdings
63
Portfolio Turnover Rate
12%
Total Advisory Fees Paid (Net)
$2,968,864
Holdings [Text Block]

Sector Breakdown (% of Net Assets)

Table Summary
Information Technology
40.0%
Communication Services
16.2%
Health Care
12.3%
Consumer Discretionary
9.2%
Industrials
7.9%
Financials
5.8%
Consumer Staples
4.8%
Materials
1.1%
Short-Term Investments
2.8%
Other assets less liabilities
-0.1%
Total
100.0%
Largest Holdings [Text Block]

10 Top Holdings

Table Summary
Company
U.S. $ Value
% of Net Assets
NVIDIA Corp.
$105,173,107
10.1%
Alphabet, Inc. - Class C
$93,291,133
9.0%
Broadcom, Inc.
$58,012,956
5.6%
Microsoft Corp.
$56,678,897
5.4%
Meta Platforms, Inc. - Class A
$44,355,145
4.3%
Visa, Inc. - Class A
$41,073,363
4.0%
Amazon.com, Inc.
$35,497,645
3.4%
Eli Lilly & Co.
$34,321,689
3.3%
Apple, Inc.
$31,305,858
3.0%
Taiwan Semiconductor Manufacturing Co., Ltd. (Sponsored ADR)
$29,284,593
2.8%
Total
$528,994,386
50.9%
Material Fund Change [Text Block]
C000028831  
Shareholder Report [Line Items]  
Fund Name AB VPS Large Cap Growth Portfolio
Class Name Class B
No Trading Symbol [Flag] true
Annual or Semi-Annual Statement [Text Block] This semi-annual shareholder report contains important information about the AB VPS Large Cap Growth Portfolio (the “Portfolio”) for the period of January 1, 2026 to June 30, 2026.
Additional Information [Text Block] Portfolio
Additional Information Phone Number (800) 227 4618
Additional Information Website https://www.abfunds.com/link/AB/64VL-B-S
Expenses [Text Block]

What were the Portfolio costs for the last six months?

(Based on a hypothetical $10,000 investment)

Table Summary
Class Name
Cost of a $10,000 investment
Costs paid as a percentage of a $10,000 investment
Class B
$45
0.89%Footnote Reference*
Footnote Description
Footnote*
Annualized
Expenses Paid, Amount $ 45
Expense Ratio, Percent 0.89% [12]
AssetsNet $ 1,038,275,945
Holdings Count | Holding 63
Advisory Fees Paid, Amount $ 2,968,864
InvestmentCompanyPortfolioTurnover 12.00%
Additional Fund Statistics [Text Block]

Key Portfolio Statistics

Table Summary
Net Assets
$1,038,275,945
# of Portfolio Holdings
63
Portfolio Turnover Rate
12%
Total Advisory Fees Paid (Net)
$2,968,864
Holdings [Text Block]

Sector Breakdown (% of Net Assets)

Table Summary
Information Technology
40.0%
Communication Services
16.2%
Health Care
12.3%
Consumer Discretionary
9.2%
Industrials
7.9%
Financials
5.8%
Consumer Staples
4.8%
Materials
1.1%
Short-Term Investments
2.8%
Other assets less liabilities
-0.1%
Total
100.0%
Largest Holdings [Text Block]

10 Top Holdings

Table Summary
Company
U.S. $ Value
% of Net Assets
NVIDIA Corp.
$105,173,107
10.1%
Alphabet, Inc. - Class C
$93,291,133
9.0%
Broadcom, Inc.
$58,012,956
5.6%
Microsoft Corp.
$56,678,897
5.4%
Meta Platforms, Inc. - Class A
$44,355,145
4.3%
Visa, Inc. - Class A
$41,073,363
4.0%
Amazon.com, Inc.
$35,497,645
3.4%
Eli Lilly & Co.
$34,321,689
3.3%
Apple, Inc.
$31,305,858
3.0%
Taiwan Semiconductor Manufacturing Co., Ltd. (Sponsored ADR)
$29,284,593
2.8%
Total
$528,994,386
50.9%
Material Fund Change [Text Block]
C000028836  
Shareholder Report [Line Items]  
Fund Name AB VPS Small Cap Growth Portfolio
Class Name Class A
No Trading Symbol [Flag] true
Annual or Semi-Annual Statement [Text Block] This semi-annual shareholder report contains important information about the AB VPS Small Cap Growth Portfolio (the “Portfolio”) for the period of January 1, 2026 to June 30, 2026.
Additional Information [Text Block] Portfolio
Additional Information Phone Number (800) 227 4618
Additional Information Website https://www.abfunds.com/link/AB/64VS-A-S
Expenses [Text Block]

What were the Portfolio costs for the last six months?

(Based on a hypothetical $10,000 investment)

Table Summary
Class Name
Cost of a $10,000 investment
Costs paid as a percentage of a $10,000 investment
Class A
$50
0.90%Footnote Reference*
Footnote Description
Footnote*
Annualized
Expenses Paid, Amount $ 50
Expense Ratio, Percent 0.90% [13]
AssetsNet $ 57,184,346
Holdings Count | Holding 116
Advisory Fees Paid, Amount $ 75,258
InvestmentCompanyPortfolioTurnover 70.00%
Additional Fund Statistics [Text Block]

Key Portfolio Statistics

Table Summary
Net Assets
$57,184,346
# of Portfolio Holdings
116
Portfolio Turnover Rate
70%
Total Advisory Fees Paid (Net)
$75,258
Holdings [Text Block]

Sector Breakdown (% of Net Assets)

Table Summary
Health Care
25.8%
Industrials
23.4%
Information Technology
22.5%
Financials
9.4%
Consumer Discretionary
9.3%
Energy
3.5%
Consumer Staples
3.1%
Materials
2.7%
Communication Services
0.5%
Short-Term Investments
4.2%
Other assets less liabilities
-4.4%
Total
100.0%
Largest Holdings [Text Block]

10 Top Holdings

Table Summary
Company
U.S. $ Value
% of Net Assets
Moog, Inc. - Class A
$1,110,037
1.9%
BrightSpring Health Services, Inc.
$1,058,235
1.9%
ESCO Technologies, Inc.
$932,857
1.6%
Chefs' Warehouse, Inc. (The)
$930,440
1.6%
Ultra Clean Holdings, Inc.
$913,432
1.6%
SiTime Corp.
$886,471
1.6%
Semtech Corp.
$879,008
1.5%
Guardant Health, Inc.
$868,974
1.5%
FirstCash Holdings, Inc.
$850,138
1.5%
Glaukos Corp.
$835,485
1.5%
Total
$9,265,077
16.2%
Material Fund Change [Text Block]
C000028837  
Shareholder Report [Line Items]  
Fund Name AB VPS Small Cap Growth Portfolio
Class Name Class B
No Trading Symbol [Flag] true
Annual or Semi-Annual Statement [Text Block] This semi-annual shareholder report contains important information about the AB VPS Small Cap Growth Portfolio (the “Portfolio”) for the period of January 1, 2026 to June 30, 2026.
Additional Information [Text Block] Portfolio
Additional Information Phone Number (800) 227 4618
Additional Information Website https://www.abfunds.com/link/AB/64VS-B-S
Expenses [Text Block]

What were the Portfolio costs for the last six months?

(Based on a hypothetical $10,000 investment)

Table Summary
Class Name
Cost of a $10,000 investment
Costs paid as a percentage of a $10,000 investment
Class B
$64
1.15%Footnote Reference*
Footnote Description
Footnote*
Annualized
Expenses Paid, Amount $ 64
Expense Ratio, Percent 1.15% [14]
AssetsNet $ 57,184,346
Holdings Count | Holding 116
Advisory Fees Paid, Amount $ 75,258
InvestmentCompanyPortfolioTurnover 70.00%
Additional Fund Statistics [Text Block]

Key Portfolio Statistics

Table Summary
Net Assets
$57,184,346
# of Portfolio Holdings
116
Portfolio Turnover Rate
70%
Total Advisory Fees Paid (Net)
$75,258
Holdings [Text Block]

Sector Breakdown (% of Net Assets)

Table Summary
Health Care
25.8%
Industrials
23.4%
Information Technology
22.5%
Financials
9.4%
Consumer Discretionary
9.3%
Energy
3.5%
Consumer Staples
3.1%
Materials
2.7%
Communication Services
0.5%
Short-Term Investments
4.2%
Other assets less liabilities
-4.4%
Total
100.0%
Largest Holdings [Text Block]

10 Top Holdings

Table Summary
Company
U.S. $ Value
% of Net Assets
Moog, Inc. - Class A
$1,110,037
1.9%
BrightSpring Health Services, Inc.
$1,058,235
1.9%
ESCO Technologies, Inc.
$932,857
1.6%
Chefs' Warehouse, Inc. (The)
$930,440
1.6%
Ultra Clean Holdings, Inc.
$913,432
1.6%
SiTime Corp.
$886,471
1.6%
Semtech Corp.
$879,008
1.5%
Guardant Health, Inc.
$868,974
1.5%
FirstCash Holdings, Inc.
$850,138
1.5%
Glaukos Corp.
$835,485
1.5%
Total
$9,265,077
16.2%
Material Fund Change [Text Block]
C000028860  
Shareholder Report [Line Items]  
Fund Name AB VPS Sustainable Global Thematic Portfolio
Class Name Class A
No Trading Symbol [Flag] true
Annual or Semi-Annual Statement [Text Block] This semi-annual shareholder report contains important information about the AB VPS Sustainable Global Thematic Portfolio (the “Portfolio”) for the period of January 1, 2026 to June 30, 2026.
Additional Information [Text Block] Portfolio
Additional Information Phone Number (800) 227 4618
Additional Information Website https://www.abfunds.com/link/AB/64VA-A-S
Expenses [Text Block]

What were the Portfolio costs for the last six months?

(Based on a hypothetical $10,000 investment)

Table Summary
Class Name
Cost of a $10,000 investment
Costs paid as a percentage of a $10,000 investment
Class A
$47
0.92%Footnote Reference*
Footnote Description
Footnote*
Annualized
Expenses Paid, Amount $ 47
Expense Ratio, Percent 0.92% [15]
AssetsNet $ 159,166,724
Holdings Count | Holding 55
Advisory Fees Paid, Amount $ 531,237
InvestmentCompanyPortfolioTurnover 62.00%
Additional Fund Statistics [Text Block]

Key Portfolio Statistics

Table Summary
Net Assets
$159,166,724
# of Portfolio Holdings
55
Portfolio Turnover Rate
62%
Total Advisory Fees Paid (Net)
$531,237
Holdings [Text Block]

Country Breakdown (% of Net Assets)

Table Summary
United States
55.7%
Japan
6.6%
United Kingdom
4.8%
Taiwan
4.1%
Italy
3.6%
Switzerland
3.6%
Hong Kong
2.6%
Brazil
1.5%
South Korea
1.5%
China
1.5%
Canada
1.2%
Austria
1.2%
Finland
1.1%
Netherlands
1.1%
Others
2.9%
Short-Term Investments
6.9%
Other assets less liabilities
0.1%
Total
100.0%

Sector Breakdown (% of Net Assets)

Table Summary
Information Technology
32.8%
Industrials
20.5%
Financials
12.5%
Health Care
11.5%
Communication Services
4.8%
Utilities
3.6%
Consumer Discretionary
2.9%
Real Estate
2.0%
Energy
1.2%
Materials
1.2%
Short-Term Investments
6.9%
Other assets less liabilities
0.1%
Total
100.0%
Largest Holdings [Text Block]

10 Top Holdings

Table Summary
Company
U.S. $ Value
% of Net Assets
NVIDIA Corp.
$7,984,992
5.0%
Alphabet, Inc. - Class A
$7,626,275
4.8%
Taiwan Semiconductor Manufacturing Co., Ltd.
$6,547,891
4.1%
Apple, Inc.
$5,749,583
3.6%
Rockwell Automation, Inc.
$4,233,429
2.6%
Galderma Group AG
$3,748,334
2.4%
Broadcom, Inc.
$3,486,632
2.2%
Cummins, Inc.
$3,359,219
2.1%
NXP Semiconductors NV
$3,324,585
2.1%
Emerson Electric Co.
$3,318,217
2.1%
Total
$49,379,157
31.0%
Material Fund Change [Text Block]
C000028861  
Shareholder Report [Line Items]  
Fund Name AB VPS Sustainable Global Thematic Portfolio
Class Name Class B
No Trading Symbol [Flag] true
Annual or Semi-Annual Statement [Text Block] This semi-annual shareholder report contains important information about the AB VPS Sustainable Global Thematic Portfolio (the “Portfolio”) for the period of January 1, 2026 to June 30, 2026.
Additional Information [Text Block] Portfolio
Additional Information Phone Number (800) 227 4618
Additional Information Website https://www.abfunds.com/link/AB/64VA-B-S
Expenses [Text Block]

What were the Portfolio costs for the last six months?

(Based on a hypothetical $10,000 investment)

Table Summary
Class Name
Cost of a $10,000 investment
Costs paid as a percentage of a $10,000 investment
Class B
$59
1.17%Footnote Reference*
Footnote Description
Footnote*
Annualized
Expenses Paid, Amount $ 59
Expense Ratio, Percent 1.17% [16]
AssetsNet $ 159,166,724
Holdings Count | Holding 55
Advisory Fees Paid, Amount $ 531,237
InvestmentCompanyPortfolioTurnover 62.00%
Additional Fund Statistics [Text Block]

Key Portfolio Statistics

Table Summary
Net Assets
$159,166,724
# of Portfolio Holdings
55
Portfolio Turnover Rate
62%
Total Advisory Fees Paid (Net)
$531,237
Holdings [Text Block]

Country Breakdown (% of Net Assets)

Table Summary
United States
55.7%
Japan
6.6%
United Kingdom
4.8%
Taiwan
4.1%
Italy
3.6%
Switzerland
3.6%
Hong Kong
2.6%
Brazil
1.5%
South Korea
1.5%
China
1.5%
Canada
1.2%
Austria
1.2%
Finland
1.1%
Netherlands
1.1%
Others
2.9%
Short-Term Investments
6.9%
Other assets less liabilities
0.1%
Total
100.0%

Sector Breakdown (% of Net Assets)

Table Summary
Information Technology
32.8%
Industrials
20.5%
Financials
12.5%
Health Care
11.5%
Communication Services
4.8%
Utilities
3.6%
Consumer Discretionary
2.9%
Real Estate
2.0%
Energy
1.2%
Materials
1.2%
Short-Term Investments
6.9%
Other assets less liabilities
0.1%
Total
100.0%
Largest Holdings [Text Block]

10 Top Holdings

Table Summary
Company
U.S. $ Value
% of Net Assets
NVIDIA Corp.
$7,984,992
5.0%
Alphabet, Inc. - Class A
$7,626,275
4.8%
Taiwan Semiconductor Manufacturing Co., Ltd.
$6,547,891
4.1%
Apple, Inc.
$5,749,583
3.6%
Rockwell Automation, Inc.
$4,233,429
2.6%
Galderma Group AG
$3,748,334
2.4%
Broadcom, Inc.
$3,486,632
2.2%
Cummins, Inc.
$3,359,219
2.1%
NXP Semiconductors NV
$3,324,585
2.1%
Emerson Electric Co.
$3,318,217
2.1%
Total
$49,379,157
31.0%
Material Fund Change [Text Block]
[1] Annualized
[2] Annualized
[3] Annualized
[4] Annualized
[5] Annualized
[6] Annualized
[7] Annualized
[8] Annualized
[9] Annualized
[10] Annualized
[11] Annualized
[12] Annualized
[13] Annualized
[14] Annualized
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[16] Annualized