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 HARTFORD SERIES FUND INC
Entity Central Index Key 0001053425
Entity Investment Company Type N-1A
Document Period End Date Jun. 30, 2026
C000008597 [Member]  
Shareholder Report [Line Items]  
Fund Name Hartford Balanced HLS Fund
Class Name Class IB
Trading Symbol HAIBX
Annual or Semi-Annual Statement [Text Block] This semi-annual shareholder report contains important information about the Hartford Balanced HLS Fund (the "Fund") for the period of January 1, 2026 to June 30, 2026.
Shareholder Report Annual or Semi-Annual semi-annual shareholder report
Additional Information [Text Block] You can find additional information about the Fund at hartfordfunds.com/reports-hls. You can also request this information by contacting us by calling 1‑888‑843‑7824.
Additional Information Phone Number 1‑888‑843‑7824
Additional Information Website hartfordfunds.com/reports-hls
Expenses [Text Block]
What were the Fund costs for the last six-months?
(Based on a hypothetical $10,000 investment)
Class Name Costs of a $10,000 investment* Costs paid as a percentage
of a $10,000 investment^,*
Class IB $45 0.89%
*
This does not reflect any transactional costs, such as sales charges (loads) or fees which may be applied at the variable life insurance, variable annuity, or qualified retirement plan product level.
^
Annualized.
Expenses Paid, Amount $ 45 [1]
Expense Ratio, Percent 0.89% [1],[2]
Net Assets $ 1,585,114,302
Holdings Count | Holding 482
Investment Company Portfolio Turnover 66.00%
Additional Fund Statistics [Text Block]
Key Fund Statistics
as of June 30, 2026
Fund's net assets $1,585,114,302
Total number of portfolio holdings (excluding derivatives, if any) 482
Portfolio turnover rate 66%
Holdings [Text Block]
Graphical Representation of Holdings
as of June 30, 2026
The table below shows the investment makeup of the Fund, representing the percentage of net assets of the Fund.
Composition by Security Type
Common Stocks 64.8 %
U.S. Government Securities 22.0 %
Corporate Bonds 9.4 %
Asset-Backed & Commercial Mortgage-Backed Securities 1.4 %
U.S. Government Agencies^ 0.7 %
Municipal Bonds 0.5 %
Foreign Government Obligations 0.0 %†
Short-Term Investments 0.6 %
Other Assets & Liabilities 0.6 %
Total 100.0 %
​^
All, or a portion of the securities categorized as U.S. Government Agencies, were agency mortgage-backed securities.
​†
Percentage rounds to zero.
C000008596 [Member]  
Shareholder Report [Line Items]  
Fund Name Hartford Balanced HLS Fund
Class Name Class IA
Trading Symbol HADAX
Annual or Semi-Annual Statement [Text Block] This semi-annual shareholder report contains important information about the Hartford Balanced HLS Fund (the "Fund") for the period of January 1, 2026 to June 30, 2026.
Shareholder Report Annual or Semi-Annual semi-annual shareholder report
Additional Information [Text Block] You can find additional information about the Fund at hartfordfunds.com/reports-hls. You can also request this information by contacting us by calling 1‑888‑843‑7824.
Additional Information Phone Number 1‑888‑843‑7824
Additional Information Website hartfordfunds.com/reports-hls
Expenses [Text Block]
What were the Fund costs for the last six-months?
(Based on a hypothetical $10,000 investment)
Class Name Costs of a $10,000 investment* Costs paid as a percentage
of a $10,000 investment^,*
Class IA $33 0.64%
*
This does not reflect any transactional costs, such as sales charges (loads) or fees which may be applied at the variable life insurance, variable annuity, or qualified retirement plan product level.
^
Annualized.
Expenses Paid, Amount $ 33 [3]
Expense Ratio, Percent 0.64% [3],[4]
Net Assets $ 1,585,114,302
Holdings Count | Holding 482
Investment Company Portfolio Turnover 66.00%
Additional Fund Statistics [Text Block]
Key Fund Statistics
as of June 30, 2026
Fund's net assets $1,585,114,302
Total number of portfolio holdings (excluding derivatives, if any) 482
Portfolio turnover rate 66%
Holdings [Text Block]
Graphical Representation of Holdings
as of June 30, 2026
The table below shows the investment makeup of the Fund, representing the percentage of net assets of the Fund.
Composition by Security Type
Common Stocks 64.8 %
U.S. Government Securities 22.0 %
Corporate Bonds 9.4 %
Asset-Backed & Commercial Mortgage-Backed Securities 1.4 %
U.S. Government Agencies^ 0.7 %
Municipal Bonds 0.5 %
Foreign Government Obligations 0.0 %†
Short-Term Investments 0.6 %
Other Assets & Liabilities 0.6 %
Total 100.0 %
​^
All, or a portion of the securities categorized as U.S. Government Agencies, were agency mortgage-backed securities.
​†
Percentage rounds to zero.
C000008598 [Member]  
Shareholder Report [Line Items]  
Fund Name Hartford Healthcare HLS Fund
Class Name Class IA
Trading Symbol HIAHX
Annual or Semi-Annual Statement [Text Block] This semi-annual shareholder report contains important information about the Hartford Healthcare HLS Fund (the "Fund") for the period of January 1, 2026 to June 30, 2026.
Shareholder Report Annual or Semi-Annual semi-annual shareholder report
Additional Information [Text Block] You can find additional information about the Fund at hartfordfunds.com/reports-hls. You can also request this information by contacting us by calling 1‑888‑843‑7824.
Additional Information Phone Number 1‑888‑843‑7824
Additional Information Website hartfordfunds.com/reports-hls
Expenses [Text Block]
What were the Fund costs for the last six-months?
(Based on a hypothetical $10,000 investment)
Class Name Costs of a $10,000 investment* Costs paid as a percentage
of a $10,000 investment^,*
Class IA $49 0.96%
*
This does not reflect any transactional costs, such as sales charges (loads) or fees which may be applied at the variable life insurance, variable annuity, or qualified retirement plan product level.
^
Annualized.
Expenses Paid, Amount $ 49 [5]
Expense Ratio, Percent 0.96% [5],[6]
Net Assets $ 112,383,933
Holdings Count | Holding 79
Investment Company Portfolio Turnover 25.00%
Additional Fund Statistics [Text Block]
Key Fund Statistics
as of June 30, 2026
Fund's net assets $112,383,933
Total number of portfolio holdings (excluding derivatives, if any) 79
Portfolio turnover rate 25%
Holdings [Text Block]
Graphical Representation of Holdings
as of June 30, 2026
The table below shows the investment makeup of the Fund, representing the percentage of net assets of the Fund.
Composition by subsector *
Pharmaceuticals 32.6 %
Biotechnology 25.0 %
Health Care Providers & Services 19.0 %
Health Care Equipment & Services & Supplies 12.8 %
Life Sciences Tools & Services 7.1 %
Health Care Technology 0.6 %
Short-Term Investments 1.1 %
Other Assets & Liabilities 1.8 %
Total 100.0 %
​*
For Fund compliance purposes, the Fund may not use the same classification system. These classifications are used for financial reporting purposes.
C000008599 [Member]  
Shareholder Report [Line Items]  
Fund Name Hartford Healthcare HLS Fund
Class Name Class IB
Trading Symbol HBGHX
Annual or Semi-Annual Statement [Text Block] This semi-annual shareholder report contains important information about the Hartford Healthcare HLS Fund (the "Fund") for the period of January 1, 2026 to June 30, 2026.
Shareholder Report Annual or Semi-Annual semi-annual shareholder report
Additional Information [Text Block] You can find additional information about the Fund at hartfordfunds.com/reports-hls. You can also request this information by contacting us by calling 1‑888‑843‑7824.
Additional Information Phone Number 1‑888‑843‑7824
Additional Information Website hartfordfunds.com/reports-hls
Expenses [Text Block]
What were the Fund costs for the last six-months?
(Based on a hypothetical $10,000 investment)
Class Name Costs of a $10,000 investment* Costs paid as a percentage
of a $10,000 investment^,*
Class IB $62 1.21%
*
This does not reflect any transactional costs, such as sales charges (loads) or fees which may be applied at the variable life insurance, variable annuity, or qualified retirement plan product level.
^
Annualized.
Expenses Paid, Amount $ 62 [7]
Expense Ratio, Percent 1.21% [7],[8]
Net Assets $ 112,383,933
Holdings Count | Holding 79
Investment Company Portfolio Turnover 25.00%
Additional Fund Statistics [Text Block]
Key Fund Statistics
as of June 30, 2026
Fund's net assets $112,383,933
Total number of portfolio holdings (excluding derivatives, if any) 79
Portfolio turnover rate 25%
Holdings [Text Block]
Graphical Representation of Holdings
as of June 30, 2026
The table below shows the investment makeup of the Fund, representing the percentage of net assets of the Fund.
Composition by subsector *
Pharmaceuticals 32.6 %
Biotechnology 25.0 %
Health Care Providers & Services 19.0 %
Health Care Equipment & Services & Supplies 12.8 %
Life Sciences Tools & Services 7.1 %
Health Care Technology 0.6 %
Short-Term Investments 1.1 %
Other Assets & Liabilities 1.8 %
Total 100.0 %
​*
For Fund compliance purposes, the Fund may not use the same classification system. These classifications are used for financial reporting purposes.
C000008613 [Member]  
Shareholder Report [Line Items]  
Fund Name Hartford International Opportunities HLS Fund
Class Name Class IB
Trading Symbol HBIOX
Annual or Semi-Annual Statement [Text Block] This semi-annual shareholder report contains important information about the Hartford International Opportunities HLS Fund (the "Fund") for the period of January 1, 2026 to June 30, 2026.
Shareholder Report Annual or Semi-Annual semi-annual shareholder report
Additional Information [Text Block] You can find additional information about the Fund at hartfordfunds.com/reports-hls. You can also request this information by contacting us by calling 1‑888‑843‑7824.
Additional Information Phone Number 1‑888‑843‑7824
Additional Information Website hartfordfunds.com/reports-hls
Expenses [Text Block]
What were the Fund costs for the last six-months?
(Based on a hypothetical $10,000 investment)
Class Name Costs of a $10,000 investment* Costs paid as a percentage
of a $10,000 investment^,*
Class IB $53 1.02%
*
This does not reflect any transactional costs, such as sales charges (loads) or fees which may be applied at the variable life insurance, variable annuity, or qualified retirement plan product level.
^
Annualized.
Expenses Paid, Amount $ 53 [9]
Expense Ratio, Percent 1.02% [9],[10]
Net Assets $ 870,066,757
Holdings Count | Holding 78
Investment Company Portfolio Turnover 26.00%
Additional Fund Statistics [Text Block]
Key Fund Statistics
as of June 30, 2026
Fund's net assets $870,066,757
Total number of portfolio holdings (excluding derivatives, if any) 78
Portfolio turnover rate 26%
Holdings [Text Block]
Graphical Representation of Holdings
as of June 30, 2026
The table below shows the investment makeup of the Fund, representing the percentage of net assets of the Fund.
Composition by Country *
Japan 12.3 %
United Kingdom 9.9 %
Germany 9.3 %
South Korea 9.3 %
France 8.3 %
Taiwan 7.9 %
Canada 5.7 %
China 5.7 %
Netherlands 4.2 %
Italy 4.0 %
Other** 21.0 %
Short-Term Investments 0.4 %
Other Assets & Liabilities 2.0 %
Total 100.0 %
*
For Fund compliance purposes, the Fund may not use the same classification system. These classifications are used for financial reporting purposes.
**
Ten largest country/geographic regions are presented. Additional country/geographic regions are found in Other.
C000008612 [Member]  
Shareholder Report [Line Items]  
Fund Name Hartford International Opportunities HLS Fund
Class Name Class IA
Trading Symbol HIAOX
Annual or Semi-Annual Statement [Text Block] This semi-annual shareholder report contains important information about the Hartford International Opportunities HLS Fund (the "Fund") for the period of January 1, 2026 to June 30, 2026.
Shareholder Report Annual or Semi-Annual semi-annual shareholder report
Additional Information [Text Block] You can find additional information about the Fund at hartfordfunds.com/reports-hls. You can also request this information by contacting us by calling 1‑888‑843‑7824.
Additional Information Phone Number 1‑888‑843‑7824
Additional Information Website hartfordfunds.com/reports-hls
Expenses [Text Block]
What were the Fund costs for the last six-months?
(Based on a hypothetical $10,000 investment)
Class Name Costs of a $10,000 investment* Costs paid as a percentage
of a $10,000 investment^,*
Class IA $40 0.77%
*
This does not reflect any transactional costs, such as sales charges (loads) or fees which may be applied at the variable life insurance, variable annuity, or qualified retirement plan product level.
^
Annualized.
Expenses Paid, Amount $ 40 [11]
Expense Ratio, Percent 0.77% [11],[12]
Net Assets $ 870,066,757
Holdings Count | Holding 78
Investment Company Portfolio Turnover 26.00%
Additional Fund Statistics [Text Block]
Key Fund Statistics
as of June 30, 2026
Fund's net assets $870,066,757
Total number of portfolio holdings (excluding derivatives, if any) 78
Portfolio turnover rate 26%
Holdings [Text Block]
Graphical Representation of Holdings
as of June 30, 2026
The table below shows the investment makeup of the Fund, representing the percentage of net assets of the Fund.
Composition by Country *
Japan 12.3 %
United Kingdom 9.9 %
Germany 9.3 %
South Korea 9.3 %
France 8.3 %
Taiwan 7.9 %
Canada 5.7 %
China 5.7 %
Netherlands 4.2 %
Italy 4.0 %
Other** 21.0 %
Short-Term Investments 0.4 %
Other Assets & Liabilities 2.0 %
Total 100.0 %
*
For Fund compliance purposes, the Fund may not use the same classification system. These classifications are used for financial reporting purposes.
**
Ten largest country/geographic regions are presented. Additional country/geographic regions are found in Other.
C000008616 [Member]  
Shareholder Report [Line Items]  
Fund Name Hartford MidCap HLS Fund
Class Name Class IA
Trading Symbol HIMCX
Annual or Semi-Annual Statement [Text Block] This semi-annual shareholder report contains important information about the Hartford MidCap HLS Fund (the "Fund") for the period of January 1, 2026 to June 30, 2026.
Shareholder Report Annual or Semi-Annual semi-annual shareholder report
Additional Information [Text Block] You can find additional information about the Fund at hartfordfunds.com/reports-hls. You can also request this information by contacting us by calling 1‑888‑843‑7824.
Additional Information Phone Number 1‑888‑843‑7824
Additional Information Website hartfordfunds.com/reports-hls
Expenses [Text Block]
What were the Fund costs for the last six-months?
(Based on a hypothetical $10,000 investment)
Class Name Costs of a $10,000 investment* Costs paid as a percentage
of a $10,000 investment^,*
Class IA $40 0.77%
*
This does not reflect any transactional costs, such as sales charges (loads) or fees which may be applied at the variable life insurance, variable annuity, or qualified retirement plan product level.
^
Annualized.
Expenses Paid, Amount $ 40 [13]
Expense Ratio, Percent 0.77% [13],[14]
Net Assets $ 749,366,130
Holdings Count | Holding 68
Investment Company Portfolio Turnover 42.00%
Additional Fund Statistics [Text Block]
Key Fund Statistics
as of June 30, 2026
Fund's net assets $749,366,130
Total number of portfolio holdings (excluding derivatives, if any) 68
Portfolio turnover rate 42%
Holdings [Text Block]
Graphical Representation of Holdings
as of June 30, 2026
The table below shows the investment makeup of the Fund, representing the percentage of net assets of the Fund.
Composition by Sector *
Information Technology 32.1 %
Industrials 27.4 %
Consumer Discretionary 13.8 %
Communication Services 8.1 %
Health Care 7.1 %
Financials 6.2 %
Consumer Staples 1.7 %
Energy 1.6 %
Real Estate 0.9 %
Short-Term Investments 0.9 %
Other Assets & Liabilities 0.2 %
Total 100.0 %
​*
For Fund compliance purposes, the Fund may not use the same classification system. These classifications are used for financial reporting purposes.
C000008617 [Member]  
Shareholder Report [Line Items]  
Fund Name Hartford MidCap HLS Fund
Class Name Class IB
Trading Symbol HBMCX
Annual or Semi-Annual Statement [Text Block] This semi-annual shareholder report contains important information about the Hartford MidCap HLS Fund (the "Fund") for the period of January 1, 2026 to June 30, 2026.
Shareholder Report Annual or Semi-Annual semi-annual shareholder report
Additional Information [Text Block] You can find additional information about the Fund at hartfordfunds.com/reports-hls. You can also request this information by contacting us by calling 1‑888‑843‑7824.
Additional Information Phone Number 1‑888‑843‑7824
Additional Information Website hartfordfunds.com/reports-hls
Expenses [Text Block]
What were the Fund costs for the last six-months?
(Based on a hypothetical $10,000 investment)
Class Name Costs of a $10,000 investment* Costs paid as a percentage
of a $10,000 investment^,*
Class IB $54 1.02%
*
This does not reflect any transactional costs, such as sales charges (loads) or fees which may be applied at the variable life insurance, variable annuity, or qualified retirement plan product level.
^
Annualized.
Expenses Paid, Amount $ 54 [15]
Expense Ratio, Percent 1.02% [15],[16]
Net Assets $ 749,366,130
Holdings Count | Holding 68
Investment Company Portfolio Turnover 42.00%
Additional Fund Statistics [Text Block]
Key Fund Statistics
as of June 30, 2026
Fund's net assets $749,366,130
Total number of portfolio holdings (excluding derivatives, if any) 68
Portfolio turnover rate 42%
Holdings [Text Block]
Graphical Representation of Holdings
as of June 30, 2026
The table below shows the investment makeup of the Fund, representing the percentage of net assets of the Fund.
Composition by Sector *
Information Technology 32.1 %
Industrials 27.4 %
Consumer Discretionary 13.8 %
Communication Services 8.1 %
Health Care 7.1 %
Financials 6.2 %
Consumer Staples 1.7 %
Energy 1.6 %
Real Estate 0.9 %
Short-Term Investments 0.9 %
Other Assets & Liabilities 0.2 %
Total 100.0 %
​*
For Fund compliance purposes, the Fund may not use the same classification system. These classifications are used for financial reporting purposes.
C000141206 [Member]  
Shareholder Report [Line Items]  
Fund Name Hartford Capital Appreciation HLS Fund
Class Name Class IC
Trading Symbol HCPCX
Annual or Semi-Annual Statement [Text Block] This semi-annual shareholder report contains important information about the Hartford Capital Appreciation HLS Fund (the "Fund") for the period of January 1, 2026 to June 30, 2026.
Shareholder Report Annual or Semi-Annual semi-annual shareholder report
Additional Information [Text Block] You can find additional information about the Fund at hartfordfunds.com/reports-hls. You can also request this information by contacting us by calling 1‑888‑843‑7824.
Additional Information Phone Number 1‑888‑843‑7824
Additional Information Website hartfordfunds.com/reports-hls
Expenses [Text Block]
What were the Fund costs for the last six-months?
(Based on a hypothetical $10,000 investment)
Class Name Costs of a $10,000 investment* Costs paid as a percentage
of a $10,000 investment^,*
Class IC $60 1.17%
*
This does not reflect any transactional costs, such as sales charges (loads) or fees which may be applied at the variable life insurance, variable annuity, or qualified retirement plan product level.
^
Annualized.
Expenses Paid, Amount $ 60 [17]
Expense Ratio, Percent 1.17% [17],[18]
Net Assets $ 3,741,452,129
Holdings Count | Holding 118
Investment Company Portfolio Turnover 36.00%
Additional Fund Statistics [Text Block]
Key Fund Statistics
as of June 30, 2026
Fund's net assets $3,741,452,129
Total number of portfolio holdings (excluding derivatives, if any) 118
Portfolio turnover rate 36%
Holdings [Text Block]
Graphical Representation of Holdings
as of June 30, 2026
The table below shows the investment makeup of the Fund, representing the percentage of net assets of the Fund.
Composition by Sector *
Information Technology 34.5 %
Communication Services 10.9 %
Financials 10.9 %
Health Care 9.4 %
Consumer Discretionary 9.1 %
Industrials 6.1 %
Consumer Staples 4.2 %
Energy 3.6 %
Real Estate 2.6 %
Utilities 2.6 %
Materials 1.8 %
Short-Term Investments 0.8 %
Other Assets & Liabilities 3.5 %
Total 100.0 %
​*
For Fund compliance purposes, the Fund may not use the same classification system. These classifications are used for financial reporting purposes.
C000008619 [Member]  
Shareholder Report [Line Items]  
Fund Name Hartford Capital Appreciation HLS Fund
Class Name Class IB
Trading Symbol HIBCX
Annual or Semi-Annual Statement [Text Block] This semi-annual shareholder report contains important information about the Hartford Capital Appreciation HLS Fund (the "Fund") for the period of January 1, 2026 to June 30, 2026.
Shareholder Report Annual or Semi-Annual semi-annual shareholder report
Additional Information [Text Block] You can find additional information about the Fund at hartfordfunds.com/reports-hls. You can also request this information by contacting us by calling 1‑888‑843‑7824.
Additional Information Phone Number 1‑888‑843‑7824
Additional Information Website hartfordfunds.com/reports-hls
Expenses [Text Block]
What were the Fund costs for the last six-months?
(Based on a hypothetical $10,000 investment)
Class Name Costs of a $10,000 investment* Costs paid as a percentage
of a $10,000 investment^,*
Class IB $47 0.92%
*
This does not reflect any transactional costs, such as sales charges (loads) or fees which may be applied at the variable life insurance, variable annuity, or qualified retirement plan product level.
^
Annualized.
Expenses Paid, Amount $ 47 [19]
Expense Ratio, Percent 0.92% [19],[20]
Net Assets $ 3,741,452,129
Holdings Count | Holding 118
Investment Company Portfolio Turnover 36.00%
Additional Fund Statistics [Text Block]
Key Fund Statistics
as of June 30, 2026
Fund's net assets $3,741,452,129
Total number of portfolio holdings (excluding derivatives, if any) 118
Portfolio turnover rate 36%
Holdings [Text Block]
Graphical Representation of Holdings
as of June 30, 2026
The table below shows the investment makeup of the Fund, representing the percentage of net assets of the Fund.
Composition by Sector *
Information Technology 34.5 %
Communication Services 10.9 %
Financials 10.9 %
Health Care 9.4 %
Consumer Discretionary 9.1 %
Industrials 6.1 %
Consumer Staples 4.2 %
Energy 3.6 %
Real Estate 2.6 %
Utilities 2.6 %
Materials 1.8 %
Short-Term Investments 0.8 %
Other Assets & Liabilities 3.5 %
Total 100.0 %
​*
For Fund compliance purposes, the Fund may not use the same classification system. These classifications are used for financial reporting purposes.
C000008618 [Member]  
Shareholder Report [Line Items]  
Fund Name Hartford Capital Appreciation HLS Fund
Class Name Class IA
Trading Symbol HIACX
Annual or Semi-Annual Statement [Text Block] This semi-annual shareholder report contains important information about the Hartford Capital Appreciation HLS Fund (the "Fund") for the period of January 1, 2026 to June 30, 2026.
Shareholder Report Annual or Semi-Annual semi-annual shareholder report
Additional Information [Text Block] You can find additional information about the Fund at hartfordfunds.com/reports-hls. You can also request this information by contacting us by calling 1‑888‑843‑7824.
Additional Information Phone Number 1‑888‑843‑7824
Additional Information Website hartfordfunds.com/reports-hls
Expenses [Text Block]
What were the Fund costs for the last six-months?
(Based on a hypothetical $10,000 investment)
Class Name Costs of a $10,000 investment* Costs paid as a percentage
of a $10,000 investment^,*
Class IA $34 0.67%
*
This does not reflect any transactional costs, such as sales charges (loads) or fees which may be applied at the variable life insurance, variable annuity, or qualified retirement plan product level.
^
Annualized.
Expenses Paid, Amount $ 34 [21]
Expense Ratio, Percent 0.67% [21],[22]
Net Assets $ 3,741,452,129
Holdings Count | Holding 118
Investment Company Portfolio Turnover 36.00%
Additional Fund Statistics [Text Block]
Key Fund Statistics
as of June 30, 2026
Fund's net assets $3,741,452,129
Total number of portfolio holdings (excluding derivatives, if any) 118
Portfolio turnover rate 36%
Holdings [Text Block]
Graphical Representation of Holdings
as of June 30, 2026
The table below shows the investment makeup of the Fund, representing the percentage of net assets of the Fund.
Composition by Sector *
Information Technology 34.5 %
Communication Services 10.9 %
Financials 10.9 %
Health Care 9.4 %
Consumer Discretionary 9.1 %
Industrials 6.1 %
Consumer Staples 4.2 %
Energy 3.6 %
Real Estate 2.6 %
Utilities 2.6 %
Materials 1.8 %
Short-Term Investments 0.8 %
Other Assets & Liabilities 3.5 %
Total 100.0 %
​*
For Fund compliance purposes, the Fund may not use the same classification system. These classifications are used for financial reporting purposes.
C000008622 [Member]  
Shareholder Report [Line Items]  
Fund Name Hartford Ultrashort Bond HLS Fund
Class Name Class IA
Trading Symbol HUBAX
Annual or Semi-Annual Statement [Text Block] This semi-annual shareholder report contains important information about the Hartford Ultrashort Bond HLS Fund (the "Fund") for the period of January 1, 2026 to June 30, 2026.
Shareholder Report Annual or Semi-Annual semi-annual shareholder report
Additional Information [Text Block] You can find additional information about the Fund at hartfordfunds.com/reports-hls. You can also request this information by contacting us by calling 1‑888‑843‑7824.
Additional Information Phone Number 1‑888‑843‑7824
Additional Information Website hartfordfunds.com/reports-hls
Expenses [Text Block]
What were the Fund costs for the last six-months?
(Based on a hypothetical $10,000 investment)
Class Name Costs of a $10,000 investment* Costs paid as a percentage
of a $10,000 investment^,*
Class IA $22 0.45%
*
This does not reflect any transactional costs, such as sales charges (loads) or fees which may be applied at the variable life insurance, variable annuity, or qualified retirement plan product level.
^
Annualized.
Expenses Paid, Amount $ 22 [23]
Expense Ratio, Percent 0.45% [23],[24]
Net Assets $ 469,195,304
Holdings Count | Holding 290
Investment Company Portfolio Turnover 37.00%
Additional Fund Statistics [Text Block]
Key Fund Statistics
as of June 30, 2026
Fund's net assets $469,195,304
Total number of portfolio holdings (excluding derivatives, if any) 290
Portfolio turnover rate 37%
Holdings [Text Block]
Graphical Representation of Holdings
as of June 30, 2026
The table below shows the investment makeup of the Fund, representing the percentage of net assets of the Fund.
Composition by Security Type
Asset-Backed & Commercial Mortgage-Backed Securities 36.6 %
Corporate Bonds 28.7 %
U.S. Government Securities 17.2 %
U.S. Government Agencies^ 7.3 %
Municipal Bonds 0.9 %
Short-Term Investments 9.0 %
Other Assets & Liabilities 0.3 %
Total 100.0 %
​^
All, or a portion of the securities categorized as U.S. Government Agencies, were agency mortgage-backed securities.
C000008623 [Member]  
Shareholder Report [Line Items]  
Fund Name Hartford Ultrashort Bond HLS Fund
Class Name Class IB
Trading Symbol HUBBX
Annual or Semi-Annual Statement [Text Block] This semi-annual shareholder report contains important information about the Hartford Ultrashort Bond HLS Fund (the "Fund") for the period of January 1, 2026 to June 30, 2026.
Shareholder Report Annual or Semi-Annual semi-annual shareholder report
Additional Information [Text Block] You can find additional information about the Fund at hartfordfunds.com/reports-hls. You can also request this information by contacting us by calling 1‑888‑843‑7824.
Additional Information Phone Number 1‑888‑843‑7824
Additional Information Website hartfordfunds.com/reports-hls
Expenses [Text Block]
What were the Fund costs for the last six-months?
(Based on a hypothetical $10,000 investment)
Class Name Costs of a $10,000 investment* Costs paid as a percentage
of a $10,000 investment^,*
Class IB $35 0.70%
*
This does not reflect any transactional costs, such as sales charges (loads) or fees which may be applied at the variable life insurance, variable annuity, or qualified retirement plan product level.
^
Annualized.
Expenses Paid, Amount $ 35 [25]
Expense Ratio, Percent 0.70% [25],[26]
Net Assets $ 469,195,304
Holdings Count | Holding 290
Investment Company Portfolio Turnover 37.00%
Additional Fund Statistics [Text Block]
Key Fund Statistics
as of June 30, 2026
Fund's net assets $469,195,304
Total number of portfolio holdings (excluding derivatives, if any) 290
Portfolio turnover rate 37%
Holdings [Text Block]
Graphical Representation of Holdings
as of June 30, 2026
The table below shows the investment makeup of the Fund, representing the percentage of net assets of the Fund.
Composition by Security Type
Asset-Backed & Commercial Mortgage-Backed Securities 36.6 %
Corporate Bonds 28.7 %
U.S. Government Securities 17.2 %
U.S. Government Agencies^ 7.3 %
Municipal Bonds 0.9 %
Short-Term Investments 9.0 %
Other Assets & Liabilities 0.3 %
Total 100.0 %
​^
All, or a portion of the securities categorized as U.S. Government Agencies, were agency mortgage-backed securities.
C000008627 [Member]  
Shareholder Report [Line Items]  
Fund Name Hartford Small Company HLS Fund
Class Name Class IB
Trading Symbol HDMBX
Annual or Semi-Annual Statement [Text Block] This semi-annual shareholder report contains important information about the Hartford Small Company HLS Fund (the "Fund") for the period of January 1, 2026 to June 30, 2026.
Shareholder Report Annual or Semi-Annual semi-annual shareholder report
Additional Information [Text Block] You can find additional information about the Fund at hartfordfunds.com/reports-hls. You can also request this information by contacting us by calling 1‑888‑843‑7824.
Additional Information Phone Number 1‑888‑843‑7824
Additional Information Website hartfordfunds.com/reports-hls
Expenses [Text Block]
What were the Fund costs for the last six-months?
(Based on a hypothetical $10,000 investment)
Class Name Costs of a $10,000 investment* Costs paid as a percentage
of a $10,000 investment^,*
Class IB $57 1.05%
*
This does not reflect any transactional costs, such as sales charges (loads) or fees which may be applied at the variable life insurance, variable annuity, or qualified retirement plan product level.
^
Annualized.
Expenses Paid, Amount $ 57 [27]
Expense Ratio, Percent 1.05% [27],[28]
Net Assets $ 470,325,140
Holdings Count | Holding 123
Investment Company Portfolio Turnover 28.00%
Additional Fund Statistics [Text Block]
Key Fund Statistics
as of June 30, 2026
Fund's net assets $470,325,140
Total number of portfolio holdings (excluding derivatives, if any) 123
Portfolio turnover rate 28%
Holdings [Text Block]
Graphical Representation of Holdings
as of June 30, 2026
The table below shows the investment makeup of the Fund, representing the percentage of net assets of the Fund.
Composition by Sector *
Health Care 30.9 %
Industrials 24.8 %
Information Technology 19.7 %
Consumer Discretionary 7.0 %
Financials 6.0 %
Real Estate 3.6 %
Energy 2.5 %
Materials 2.2 %
Consumer Staples 1.9 %
Communication Services 0.8 %
Utilities 0.1 %
Short-Term Investments 3.4 %
Other Assets & Liabilities (2.9 )%
Total 100.0 %
​*
For Fund compliance purposes, the Fund may not use the same classification system. These classifications are used for financial reporting purposes.
C000008626 [Member]  
Shareholder Report [Line Items]  
Fund Name Hartford Small Company HLS Fund
Class Name Class IA
Trading Symbol HIASX
Annual or Semi-Annual Statement [Text Block] This semi-annual shareholder report contains important information about the Hartford Small Company HLS Fund (the "Fund") for the period of January 1, 2026 to June 30, 2026.
Shareholder Report Annual or Semi-Annual semi-annual shareholder report
Additional Information [Text Block] You can find additional information about the Fund at hartfordfunds.com/reports-hls. You can also request this information by contacting us by calling 1‑888‑843‑7824.
Additional Information Phone Number 1‑888‑843‑7824
Additional Information Website hartfordfunds.com/reports-hls
Expenses [Text Block]
What were the Fund costs for the last six-months?
(Based on a hypothetical $10,000 investment)
Class Name Costs of a $10,000 investment* Costs paid as a percentage
of a $10,000 investment^,*
Class IA $43 0.80%
*
This does not reflect any transactional costs, such as sales charges (loads) or fees which may be applied at the variable life insurance, variable annuity, or qualified retirement plan product level.
^
Annualized.
Expenses Paid, Amount $ 43 [29]
Expense Ratio, Percent 0.80% [29],[30]
Net Assets $ 470,325,140
Holdings Count | Holding 123
Investment Company Portfolio Turnover 28.00%
Additional Fund Statistics [Text Block]
Key Fund Statistics
as of June 30, 2026
Fund's net assets $470,325,140
Total number of portfolio holdings (excluding derivatives, if any) 123
Portfolio turnover rate 28%
Holdings [Text Block]
Graphical Representation of Holdings
as of June 30, 2026
The table below shows the investment makeup of the Fund, representing the percentage of net assets of the Fund.
Composition by Sector *
Health Care 30.9 %
Industrials 24.8 %
Information Technology 19.7 %
Consumer Discretionary 7.0 %
Financials 6.0 %
Real Estate 3.6 %
Energy 2.5 %
Materials 2.2 %
Consumer Staples 1.9 %
Communication Services 0.8 %
Utilities 0.1 %
Short-Term Investments 3.4 %
Other Assets & Liabilities (2.9 )%
Total 100.0 %
​*
For Fund compliance purposes, the Fund may not use the same classification system. These classifications are used for financial reporting purposes.
C000008628 [Member]  
Shareholder Report [Line Items]  
Fund Name Hartford Stock HLS Fund
Class Name Class IA
Trading Symbol HSTAX
Annual or Semi-Annual Statement [Text Block] This semi-annual shareholder report contains important information about the Hartford Stock HLS Fund (the "Fund") for the period of January 1, 2026 to June 30, 2026.
Shareholder Report Annual or Semi-Annual semi-annual shareholder report
Additional Information [Text Block] You can find additional information about the Fund at hartfordfunds.com/reports-hls. You can also request this information by contacting us by calling 1‑888‑843‑7824.
Additional Information Phone Number 1‑888‑843‑7824
Additional Information Website hartfordfunds.com/reports-hls
Expenses [Text Block]
What were the Fund costs for the last six-months?
(Based on a hypothetical $10,000 investment)
Class Name Costs of a $10,000 investment* Costs paid as a percentage
of a $10,000 investment^,*
Class IA $26 0.52%
*
This does not reflect any transactional costs, such as sales charges (loads) or fees which may be applied at the variable life insurance, variable annuity, or qualified retirement plan product level.
^
Annualized.
Expenses Paid, Amount $ 26 [31]
Expense Ratio, Percent 0.52% [31],[32]
Net Assets $ 1,180,116,546
Holdings Count | Holding 52
Investment Company Portfolio Turnover 22.00%
Additional Fund Statistics [Text Block]
Key Fund Statistics
as of June 30, 2026
Fund's net assets $1,180,116,546
Total number of portfolio holdings (excluding derivatives, if any) 52
Portfolio turnover rate 22%
Holdings [Text Block]
Graphical Representation of Holdings
as of June 30, 2026
The table below shows the investment makeup of the Fund, representing the percentage of net assets of the Fund.
Composition by Sector *
Information Technology 25.0 %
Financials 19.6 %
Health Care 17.3 %
Industrials 13.5 %
Consumer Discretionary 8.8 %
Consumer Staples 7.0 %
Materials 2.5 %
Communication Services 2.1 %
Energy 1.6 %
Utilities 1.0 %
Short-Term Investments 0.3 %
Other Assets & Liabilities 1.3 %
Total 100.0 %
​*
For Fund compliance purposes, the Fund may not use the same classification system. These classifications are used for financial reporting purposes.
C000008629 [Member]  
Shareholder Report [Line Items]  
Fund Name Hartford Stock HLS Fund
Class Name Class IB
Trading Symbol HIBSX
Annual or Semi-Annual Statement [Text Block] This semi-annual shareholder report contains important information about the Hartford Stock HLS Fund (the "Fund") for the period of January 1, 2026 to June 30, 2026.
Shareholder Report Annual or Semi-Annual semi-annual shareholder report
Additional Information [Text Block] You can find additional information about the Fund at hartfordfunds.com/reports-hls. You can also request this information by contacting us by calling 1‑888‑843‑7824.
Additional Information Phone Number 1‑888‑843‑7824
Additional Information Website hartfordfunds.com/reports-hls
Expenses [Text Block]
What were the Fund costs for the last six-months?
(Based on a hypothetical $10,000 investment)
Class Name Costs of a $10,000 investment* Costs paid as a percentage
of a $10,000 investment^,*
Class IB $39 0.77%
*
This does not reflect any transactional costs, such as sales charges (loads) or fees which may be applied at the variable life insurance, variable annuity, or qualified retirement plan product level.
^
Annualized.
Expenses Paid, Amount $ 39 [33]
Expense Ratio, Percent 0.77% [33],[34]
Net Assets $ 1,180,116,546
Holdings Count | Holding 52
Investment Company Portfolio Turnover 22.00%
Additional Fund Statistics [Text Block]
Key Fund Statistics
as of June 30, 2026
Fund's net assets $1,180,116,546
Total number of portfolio holdings (excluding derivatives, if any) 52
Portfolio turnover rate 22%
Holdings [Text Block]
Graphical Representation of Holdings
as of June 30, 2026
The table below shows the investment makeup of the Fund, representing the percentage of net assets of the Fund.
Composition by Sector *
Information Technology 25.0 %
Financials 19.6 %
Health Care 17.3 %
Industrials 13.5 %
Consumer Discretionary 8.8 %
Consumer Staples 7.0 %
Materials 2.5 %
Communication Services 2.1 %
Energy 1.6 %
Utilities 1.0 %
Short-Term Investments 0.3 %
Other Assets & Liabilities 1.3 %
Total 100.0 %
​*
For Fund compliance purposes, the Fund may not use the same classification system. These classifications are used for financial reporting purposes.
C000008631 [Member]  
Shareholder Report [Line Items]  
Fund Name Hartford Total Return Bond HLS Fund
Class Name Class IB
Trading Symbol HBNBX
Annual or Semi-Annual Statement [Text Block] This semi-annual shareholder report contains important information about the Hartford Total Return Bond HLS Fund (the "Fund") for the period of January 1, 2026 to June 30, 2026.
Shareholder Report Annual or Semi-Annual semi-annual shareholder report
Additional Information [Text Block] You can find additional information about the Fund at hartfordfunds.com/reports-hls. You can also request this information by contacting us by calling 1‑888‑843‑7824.
Additional Information Phone Number 1‑888‑843‑7824
Additional Information Website hartfordfunds.com/reports-hls
Expenses [Text Block]
What were the Fund costs for the last six-months?
(Based on a hypothetical $10,000 investment)
Class Name Costs of a $10,000 investment* Costs paid as a percentage
of a $10,000 investment^,*
Class IB $38 0.77%
*
This does not reflect any transactional costs, such as sales charges (loads) or fees which may be applied at the variable life insurance, variable annuity, or qualified retirement plan product level.
^
Annualized.
Expenses Paid, Amount $ 38 [35]
Expense Ratio, Percent 0.77% [35],[36]
Net Assets $ 1,331,514,210
Holdings Count | Holding 1,535
Investment Company Portfolio Turnover 55.00%
Additional Fund Statistics [Text Block]
Key Fund Statistics
as of June 30, 2026
Fund's net assets $1,331,514,210
Total number of portfolio holdings 1,535
Portfolio turnover rate (excludes to be announced (TBA) roll transactions) 55%
Holdings [Text Block]
Graphical Representation of Holdings
as of June 30, 2026
The table below shows the investment makeup of the Fund, representing the percentage of net assets of the Fund.
Composition by Security Type
U.S. Government Agencies^ 48.0 %
U.S. Government Securities 29.6 %
Asset-Backed & Commercial Mortgage-Backed Securities 22.1 %
Corporate Bonds 18.9 %
Foreign Government Obligations 2.2 %
Senior Floating Rate Interests 0.9 %
Convertible Bonds 0.1 %
Municipal Bonds 0.1 %
Preferred Stocks 0.0 %†
Short-Term Investments 1.2 %
Other Assets & Liabilities (23.1 )%
Total 100.0 %
​^
All, or a portion of the securities categorized as U.S. Government Agencies, were agency mortgage-backed securities.
​†
Percentage rounds to zero.
C000008630 [Member]  
Shareholder Report [Line Items]  
Fund Name Hartford Total Return Bond HLS Fund
Class Name Class IA
Trading Symbol HIABX
Annual or Semi-Annual Statement [Text Block] This semi-annual shareholder report contains important information about the Hartford Total Return Bond HLS Fund (the "Fund") for the period of January 1, 2026 to June 30, 2026.
Shareholder Report Annual or Semi-Annual semi-annual shareholder report
Additional Information [Text Block] You can find additional information about the Fund at hartfordfunds.com/reports-hls. You can also request this information by contacting us by calling 1‑888‑843‑7824.
Additional Information Phone Number 1‑888‑843‑7824
Additional Information Website hartfordfunds.com/reports-hls
Expenses [Text Block]
What were the Fund costs for the last six-months?
(Based on a hypothetical $10,000 investment)
Class Name Costs of a $10,000 investment* Costs paid as a percentage
of a $10,000 investment^,*
Class IA $26 0.52%
*
This does not reflect any transactional costs, such as sales charges (loads) or fees which may be applied at the variable life insurance, variable annuity, or qualified retirement plan product level.
^
Annualized.
Expenses Paid, Amount $ 26 [37]
Expense Ratio, Percent 0.52% [37],[38]
Net Assets $ 1,331,514,210
Holdings Count | Holding 1,535
Investment Company Portfolio Turnover 55.00%
Additional Fund Statistics [Text Block]
Key Fund Statistics
as of June 30, 2026
Fund's net assets $1,331,514,210
Total number of portfolio holdings 1,535
Portfolio turnover rate (excludes to be announced (TBA) roll transactions) 55%
Holdings [Text Block]
Graphical Representation of Holdings
as of June 30, 2026
The table below shows the investment makeup of the Fund, representing the percentage of net assets of the Fund.
Composition by Security Type
U.S. Government Agencies^ 48.0 %
U.S. Government Securities 29.6 %
Asset-Backed & Commercial Mortgage-Backed Securities 22.1 %
Corporate Bonds 18.9 %
Foreign Government Obligations 2.2 %
Senior Floating Rate Interests 0.9 %
Convertible Bonds 0.1 %
Municipal Bonds 0.1 %
Preferred Stocks 0.0 %†
Short-Term Investments 1.2 %
Other Assets & Liabilities (23.1 )%
Total 100.0 %

​^

All, or a portion of the securities categorized as U.S. Government Agencies, were agency mortgage-backed securities.

​†

Percentage rounds to zero.
C000008634 [Member]  
Shareholder Report [Line Items]  
Fund Name Hartford Disciplined Equity HLS Fund
Class Name Class IA
Trading Symbol HIAGX
Annual or Semi-Annual Statement [Text Block] This semi-annual shareholder report contains important information about the Hartford Disciplined Equity HLS Fund (the "Fund") for the period of January 1, 2026 to June 30, 2026.
Shareholder Report Annual or Semi-Annual semi-annual shareholder report
Additional Information [Text Block] You can find additional information about the Fund at hartfordfunds.com/reports-hls. You can also request this information by contacting us by calling 1‑888‑843‑7824.
Additional Information Phone Number 1‑888‑843‑7824
Additional Information Website hartfordfunds.com/reports-hls
Expenses [Text Block]
What were the Fund costs for the last six-months?
(Based on a hypothetical $10,000 investment)
Class Name Costs of a $10,000 investment* Costs paid as a percentage
of a $10,000 investment^,*
Class IA $30 0.59%
*
This does not reflect any transactional costs, such as sales charges (loads) or fees which may be applied at the variable life insurance, variable annuity, or qualified retirement plan product level.
^
Annualized.
Expenses Paid, Amount $ 30 [39]
Expense Ratio, Percent 0.59% [39],[40]
Net Assets $ 3,032,883,372
Holdings Count | Holding 77
Investment Company Portfolio Turnover 20.00%
Additional Fund Statistics [Text Block]
Key Fund Statistics
as of June 30, 2026
Fund's net assets $3,032,883,372
Total number of portfolio holdings (excluding derivatives, if any) 77
Portfolio turnover rate 20%
Holdings [Text Block]
Graphical Representation of Holdings
as of June 30, 2026
The table below shows the investment makeup of the Fund, representing the percentage of net assets of the Fund.
Composition by Sector *
Information Technology 36.2 %
Communication Services 11.2 %
Financials 10.5 %
Industrials 9.5 %
Consumer Discretionary 8.3 %
Health Care 7.8 %
Consumer Staples 5.7 %
Energy 3.1 %
Real Estate 2.3 %
Utilities 2.3 %
Materials 2.1 %
Short-Term Investments 0.2 %
Other Assets & Liabilities 0.8 %
Total 100.0 %
​*
For Fund compliance purposes, the Fund may not use the same classification system. These classifications are used for financial reporting purposes.
C000008635 [Member]  
Shareholder Report [Line Items]  
Fund Name Hartford Disciplined Equity HLS Fund
Class Name Class IB
Trading Symbol HBGIX
Annual or Semi-Annual Statement [Text Block] This semi-annual shareholder report contains important information about the Hartford Disciplined Equity HLS Fund (the "Fund") for the period of January 1, 2026 to June 30, 2026.
Shareholder Report Annual or Semi-Annual semi-annual shareholder report
Additional Information [Text Block] You can find additional information about the Fund at hartfordfunds.com/reports-hls. You can also request this information by contacting us by calling 1‑888‑843‑7824.
Additional Information Phone Number 1‑888‑843‑7824
Additional Information Website hartfordfunds.com/reports-hls
Expenses [Text Block]
What were the Fund costs for the last six-months?
(Based on a hypothetical $10,000 investment)
Class Name Costs of a $10,000 investment* Costs paid as a percentage
of a $10,000 investment^,*
Class IB $43 0.84%
*
This does not reflect any transactional costs, such as sales charges (loads) or fees which may be applied at the variable life insurance, variable annuity, or qualified retirement plan product level.
^
Annualized.
Expenses Paid, Amount $ 43 [41]
Expense Ratio, Percent 0.84% [41],[42]
Net Assets $ 3,032,883,372
Holdings Count | Holding 77
Investment Company Portfolio Turnover 20.00%
Additional Fund Statistics [Text Block]
Key Fund Statistics
as of June 30, 2026
Fund's net assets $3,032,883,372
Total number of portfolio holdings (excluding derivatives, if any) 77
Portfolio turnover rate 20%
Holdings [Text Block]
Graphical Representation of Holdings
as of June 30, 2026
The table below shows the investment makeup of the Fund, representing the percentage of net assets of the Fund.
Composition by Sector *
Information Technology 36.2 %
Communication Services 11.2 %
Financials 10.5 %
Industrials 9.5 %
Consumer Discretionary 8.3 %
Health Care 7.8 %
Consumer Staples 5.7 %
Energy 3.1 %
Real Estate 2.3 %
Utilities 2.3 %
Materials 2.1 %
Short-Term Investments 0.2 %
Other Assets & Liabilities 0.8 %
Total 100.0 %
​*
For Fund compliance purposes, the Fund may not use the same classification system. These classifications are used for financial reporting purposes.
C000221440 [Member]  
Shareholder Report [Line Items]  
Fund Name Hartford Disciplined Equity HLS Fund
Class Name Class IC
Trading Symbol HLSCX
Annual or Semi-Annual Statement [Text Block] This semi-annual shareholder report contains important information about the Hartford Disciplined Equity HLS Fund (the "Fund") for the period of January 1, 2026 to June 30, 2026.
Shareholder Report Annual or Semi-Annual semi-annual shareholder report
Additional Information [Text Block] You can find additional information about the Fund at hartfordfunds.com/reports-hls. You can also request this information by contacting us by calling 1‑888‑843‑7824.
Additional Information Phone Number 1‑888‑843‑7824
Additional Information Website hartfordfunds.com/reports-hls
Expenses [Text Block]
What were the Fund costs for the last six-months?
(Based on a hypothetical $10,000 investment)
Class Name Costs of a $10,000 investment* Costs paid as a percentage
of a $10,000 investment^,*
Class IC $56 1.09%
*
This does not reflect any transactional costs, such as sales charges (loads) or fees which may be applied at the variable life insurance, variable annuity, or qualified retirement plan product level.
^
Annualized.
Expenses Paid, Amount $ 56 [43]
Expense Ratio, Percent 1.09% [43],[44]
Net Assets $ 3,032,883,372
Holdings Count | Holding 77
Investment Company Portfolio Turnover 20.00%
Additional Fund Statistics [Text Block]
Key Fund Statistics
as of June 30, 2026
Fund's net assets $3,032,883,372
Total number of portfolio holdings (excluding derivatives, if any) 77
Portfolio turnover rate 20%
Holdings [Text Block]
Graphical Representation of Holdings
as of June 30, 2026
The table below shows the investment makeup of the Fund, representing the percentage of net assets of the Fund.
Composition by Sector *
Information Technology 36.2 %
Communication Services 11.2 %
Financials 10.5 %
Industrials 9.5 %
Consumer Discretionary 8.3 %
Health Care 7.8 %
Consumer Staples 5.7 %
Energy 3.1 %
Real Estate 2.3 %
Utilities 2.3 %
Materials 2.1 %
Short-Term Investments 0.2 %
Other Assets & Liabilities 0.8 %
Total 100.0 %
​*
For Fund compliance purposes, the Fund may not use the same classification system. These classifications are used for financial reporting purposes.
C000008637 [Member]  
Shareholder Report [Line Items]  
Fund Name Hartford Dividend and Growth HLS Fund
Class Name Class IB
Trading Symbol HDGBX
Annual or Semi-Annual Statement [Text Block] This semi-annual shareholder report contains important information about the Hartford Dividend and Growth HLS Fund (the "Fund") for the period of January 1, 2026 to June 30, 2026.
Shareholder Report Annual or Semi-Annual semi-annual shareholder report
Additional Information [Text Block] You can find additional information about the Fund at hartfordfunds.com/reports-hls. You can also request this information by contacting us by calling 1‑888‑843‑7824.
Additional Information Phone Number 1‑888‑843‑7824
Additional Information Website hartfordfunds.com/reports-hls
Expenses [Text Block]
What were the Fund costs for the last six-months?
(Based on a hypothetical $10,000 investment)
Class Name Costs of a $10,000 investment* Costs paid as a percentage
of a $10,000 investment^,*
Class IB $47 0.91%
*
This does not reflect any transactional costs, such as sales charges (loads) or fees which may be applied at the variable life insurance, variable annuity, or qualified retirement plan product level.
^
Annualized.
Expenses Paid, Amount $ 47 [45]
Expense Ratio, Percent 0.91% [45],[46]
Net Assets $ 3,462,145,842
Holdings Count | Holding 72
Investment Company Portfolio Turnover 28.00%
Additional Fund Statistics [Text Block]
Key Fund Statistics
as of June 30, 2026
Fund's net assets $3,462,145,842
Total number of portfolio holdings (excluding derivatives, if any) 72
Portfolio turnover rate 28%
Holdings [Text Block]
Graphical Representation of Holdings
as of June 30, 2026
The table below shows the investment makeup of the Fund, representing the percentage of net assets of the Fund.
Composition by Sector *
Information Technology 23.0 %
Financials 15.7 %
Health Care 14.3 %
Industrials 11.7 %
Consumer Discretionary 10.2 %
Consumer Staples 5.8 %
Energy 5.7 %
Utilities 4.3 %
Real Estate 3.1 %
Communication Services 2.9 %
Materials 2.6 %
Short-Term Investments 1.0 %
Other Assets & Liabilities (0.3 )%
Total 100.0 %
​*
For Fund compliance purposes, the Fund may not use the same classification system. These classifications are used for financial reporting purposes.
C000008636 [Member]  
Shareholder Report [Line Items]  
Fund Name Hartford Dividend and Growth HLS Fund
Class Name Class IA
Trading Symbol HIADX
Annual or Semi-Annual Statement [Text Block] This semi-annual shareholder report contains important information about the Hartford Dividend and Growth HLS Fund (the "Fund") for the period of January 1, 2026 to June 30, 2026.
Shareholder Report Annual or Semi-Annual semi-annual shareholder report
Additional Information [Text Block] You can find additional information about the Fund at hartfordfunds.com/reports-hls. You can also request this information by contacting us by calling 1‑888‑843‑7824.
Additional Information Phone Number 1‑888‑843‑7824
Additional Information Website hartfordfunds.com/reports-hls
Expenses [Text Block]
What were the Fund costs for the last six-months?
(Based on a hypothetical $10,000 investment)
Class Name Costs of a $10,000 investment* Costs paid as a percentage
of a $10,000 investment^,*
Class IA $34 0.66%
*
This does not reflect any transactional costs, such as sales charges (loads) or fees which may be applied at the variable life insurance, variable annuity, or qualified retirement plan product level.
^
Annualized.
Expenses Paid, Amount $ 34 [47]
Expense Ratio, Percent 0.66% [47],[48]
Net Assets $ 3,462,145,842
Holdings Count | Holding 72
Investment Company Portfolio Turnover 28.00%
Additional Fund Statistics [Text Block]
Key Fund Statistics
as of June 30, 2026
Fund's net assets $3,462,145,842
Total number of portfolio holdings (excluding derivatives, if any) 72
Portfolio turnover rate 28%
Holdings [Text Block]
Graphical Representation of Holdings
as of June 30, 2026
The table below shows the investment makeup of the Fund, representing the percentage of net assets of the Fund.
Composition by Sector *
Information Technology 23.0 %
Financials 15.7 %
Health Care 14.3 %
Industrials 11.7 %
Consumer Discretionary 10.2 %
Consumer Staples 5.8 %
Energy 5.7 %
Utilities 4.3 %
Real Estate 3.1 %
Communication Services 2.9 %
Materials 2.6 %
Short-Term Investments 1.0 %
Other Assets & Liabilities (0.3 )%
Total 100.0 %
​*
For Fund compliance purposes, the Fund may not use the same classification system. These classifications are used for financial reporting purposes.
C000249287 [Member]  
Shareholder Report [Line Items]  
Fund Name Hartford Small Cap Growth HLS Fund
Class Name Class IA
Trading Symbol HISCX
Annual or Semi-Annual Statement [Text Block] This semi-annual shareholder report contains important information about the Hartford Small Cap Growth HLS Fund (the "Fund") for the period of January 1, 2026 to June 30, 2026.
Shareholder Report Annual or Semi-Annual semi-annual shareholder report
Additional Information [Text Block] You can find additional information about the Fund at hartfordfunds.com/reports-hls. You can also request this information by contacting us by calling 1‑888‑843‑7824.
Additional Information Phone Number 1‑888‑843‑7824
Additional Information Website hartfordfunds.com/reports-hls
Expenses [Text Block]
What were the Fund costs for the last six-months?
(Based on a hypothetical $10,000 investment)
Class Name Costs of a $10,000 investment* Costs paid as a percentage
of a $10,000 investment^,*
Class IA $37 0.66%
*
This does not reflect any transactional costs, such as sales charges (loads) or fees which may be applied at the variable life insurance, variable annuity, or qualified retirement plan product level.
^
Annualized.
Expenses Paid, Amount $ 37 [49]
Expense Ratio, Percent 0.66% [49],[50]
Net Assets $ 667,363,525
Holdings Count | Holding 188
Investment Company Portfolio Turnover 56.00%
Additional Fund Statistics [Text Block]
Key Fund Statistics
as of June 30, 2026
Fund's net assets $667,363,525
Total number of portfolio holdings (excluding derivatives, if any) 188
Portfolio turnover rate 56%
Holdings [Text Block]
Graphical Representation of Holdings
as of June 30, 2026
The table below shows the investment makeup of the Fund, representing the percentage of net assets of the Fund.
Composition by Sector *
Health Care 28.2 %
Information Technology 21.1 %
Industrials 20.3 %
Financials 9.2 %
Consumer Discretionary 7.8 %
Energy 3.4 %
Materials 3.1 %
Consumer Staples 3.0 %
Real Estate 1.5 %
Communication Services 1.3 %
Utilities 0.6 %
Short-Term Investments 1.2 %
Other Assets & Liabilities (0.7 )%
Total 100.0 %
​*
For Fund compliance purposes, the Fund may not use the same classification system. These classifications are used for financial reporting purposes.
C000249288 [Member]  
Shareholder Report [Line Items]  
Fund Name Hartford Small Cap Growth HLS Fund
Class Name Class IB
Trading Symbol HBSGX
Annual or Semi-Annual Statement [Text Block] This semi-annual shareholder report contains important information about the Hartford Small Cap Growth HLS Fund (the "Fund") for the period of January 1, 2026 to June 30, 2026.
Shareholder Report Annual or Semi-Annual semi-annual shareholder report
Additional Information [Text Block] You can find additional information about the Fund at hartfordfunds.com/reports-hls. You can also request this information by contacting us by calling 1‑888‑843‑7824.
Additional Information Phone Number 1‑888‑843‑7824
Additional Information Website hartfordfunds.com/reports-hls
Expenses [Text Block]
What were the Fund costs for the last six-months?
(Based on a hypothetical $10,000 investment)
Class Name Costs of a $10,000 investment* Costs paid as a percentage
of a $10,000 investment^,*
Class IB $51 0.91%
*
This does not reflect any transactional costs, such as sales charges (loads) or fees which may be applied at the variable life insurance, variable annuity, or qualified retirement plan product level.
^
Annualized.
Expenses Paid, Amount $ 51 [51]
Expense Ratio, Percent 0.91% [51],[52]
Net Assets $ 667,363,525
Holdings Count | Holding 188
Investment Company Portfolio Turnover 56.00%
Additional Fund Statistics [Text Block]
Key Fund Statistics
as of June 30, 2026
Fund's net assets $667,363,525
Total number of portfolio holdings (excluding derivatives, if any) 188
Portfolio turnover rate 56%
Holdings [Text Block]
Graphical Representation of Holdings
as of June 30, 2026
The table below shows the investment makeup of the Fund, representing the percentage of net assets of the Fund.
Composition by Sector *
Health Care 28.2 %
Information Technology 21.1 %
Industrials 20.3 %
Financials 9.2 %
Consumer Discretionary 7.8 %
Energy 3.4 %
Materials 3.1 %
Consumer Staples 3.0 %
Real Estate 1.5 %
Communication Services 1.3 %
Utilities 0.6 %
Short-Term Investments 1.2 %
Other Assets & Liabilities (0.7 )%
Total 100.0 %
​*
For Fund compliance purposes, the Fund may not use the same classification system. These classifications are used for financial reporting purposes.
[1]
This does not reflect any transactional costs, such as sales charges (loads) or fees which may be applied at the variable life insurance, variable annuity, or qualified retirement plan product level.
[2]
Annualized.
[3]
This does not reflect any transactional costs, such as sales charges (loads) or fees which may be applied at the variable life insurance, variable annuity, or qualified retirement plan product level.
[4]
Annualized.
[5]
This does not reflect any transactional costs, such as sales charges (loads) or fees which may be applied at the variable life insurance, variable annuity, or qualified retirement plan product level.
[6]
Annualized.
[7]
This does not reflect any transactional costs, such as sales charges (loads) or fees which may be applied at the variable life insurance, variable annuity, or qualified retirement plan product level.
[8]
Annualized.
[9]
This does not reflect any transactional costs, such as sales charges (loads) or fees which may be applied at the variable life insurance, variable annuity, or qualified retirement plan product level.
[10]
Annualized.
[11]
This does not reflect any transactional costs, such as sales charges (loads) or fees which may be applied at the variable life insurance, variable annuity, or qualified retirement plan product level.
[12]
Annualized.
[13]
This does not reflect any transactional costs, such as sales charges (loads) or fees which may be applied at the variable life insurance, variable annuity, or qualified retirement plan product level.
[14]
Annualized.
[15]
This does not reflect any transactional costs, such as sales charges (loads) or fees which may be applied at the variable life insurance, variable annuity, or qualified retirement plan product level.
[16]
Annualized.
[17]
This does not reflect any transactional costs, such as sales charges (loads) or fees which may be applied at the variable life insurance, variable annuity, or qualified retirement plan product level.
[18]
Annualized.
[19]
This does not reflect any transactional costs, such as sales charges (loads) or fees which may be applied at the variable life insurance, variable annuity, or qualified retirement plan product level.
[20]
Annualized.
[21]
This does not reflect any transactional costs, such as sales charges (loads) or fees which may be applied at the variable life insurance, variable annuity, or qualified retirement plan product level.
[22]
Annualized.
[23]
This does not reflect any transactional costs, such as sales charges (loads) or fees which may be applied at the variable life insurance, variable annuity, or qualified retirement plan product level.
[24]
Annualized.
[25]
This does not reflect any transactional costs, such as sales charges (loads) or fees which may be applied at the variable life insurance, variable annuity, or qualified retirement plan product level.
[26]
Annualized.
[27]
This does not reflect any transactional costs, such as sales charges (loads) or fees which may be applied at the variable life insurance, variable annuity, or qualified retirement plan product level.
[28]
Annualized.
[29]
This does not reflect any transactional costs, such as sales charges (loads) or fees which may be applied at the variable life insurance, variable annuity, or qualified retirement plan product level.
[30]
Annualized.
[31] This does not reflect any transactional costs, such as sales charges (loads) or fees which may be applied at the variable life insurance, variable annuity, or qualified retirement plan product level.
[32] Annualized.
[33] This does not reflect any transactional costs, such as sales charges (loads) or fees which may be applied at the variable life insurance, variable annuity, or qualified retirement plan product level.
[34] Annualized.
[35]
This does not reflect any transactional costs, such as sales charges (loads) or fees which may be applied at the variable life insurance, variable annuity, or qualified retirement plan product level.
[36]
Annualized.
[37]
This does not reflect any transactional costs, such as sales charges (loads) or fees which may be applied at the variable life insurance, variable annuity, or qualified retirement plan product level.
[38]
Annualized.
[39]
This does not reflect any transactional costs, such as sales charges (loads) or fees which may be applied at the variable life insurance, variable annuity, or qualified retirement plan product level.
[40]
Annualized.
[41]
This does not reflect any transactional costs, such as sales charges (loads) or fees which may be applied at the variable life insurance, variable annuity, or qualified retirement plan product level.
[42]
Annualized.
[43]
This does not reflect any transactional costs, such as sales charges (loads) or fees which may be applied at the variable life insurance, variable annuity, or qualified retirement plan product level.
[44]
Annualized.
[45] This does not reflect any transactional costs, such as sales charges (loads) or fees which may be applied at the variable life insurance, variable annuity, or qualified retirement plan product level.
[46] Annualized.
[47] This does not reflect any transactional costs, such as sales charges (loads) or fees which may be applied at the variable life insurance, variable annuity, or qualified retirement plan product level.
[48] Annualized.
[49]
This does not reflect any transactional costs, such as sales charges (loads) or fees which may be applied at the variable life insurance, variable annuity, or qualified retirement plan product level.
[50]
Annualized.
[51]
This does not reflect any transactional costs, such as sales charges (loads) or fees which may be applied at the variable life insurance, variable annuity, or qualified retirement plan product level.
[52]
Annualized.