Shareholder Fees	May 01, 2026
Conservative Allocation Fund \| Conservative Allocation Fund Class I
Prospectus [Line Items]
Maximum Sales Charge Imposed on Purchases (as a percentage of Offering Price)	0.00%
Maximum Deferred Sales Charge (as a percentage)	0.00%
Redemption Fee (as a percentage of Amount Redeemed)	0.00%
Conservative Allocation Fund \| Conservative Allocation Fund Class II
Prospectus [Line Items]
Maximum Sales Charge Imposed on Purchases (as a percentage of Offering Price)	0.00%
Maximum Deferred Sales Charge (as a percentage)	0.00%
Redemption Fee (as a percentage of Amount Redeemed)	0.00%
Moderate Allocation Fund \| Moderate Allocation Fund Class I
Prospectus [Line Items]
Maximum Sales Charge Imposed on Purchases (as a percentage of Offering Price)	0.00%
Maximum Deferred Sales Charge (as a percentage)	0.00%
Redemption Fee (as a percentage of Amount Redeemed)	0.00%
Moderate Allocation Fund \| Moderate Allocation Fund Class II
Prospectus [Line Items]
Maximum Sales Charge Imposed on Purchases (as a percentage of Offering Price)	0.00%
Maximum Deferred Sales Charge (as a percentage)	0.00%
Redemption Fee (as a percentage of Amount Redeemed)	0.00%
Aggressive Allocation Fund \| Aggressive Allocation Fund Class I
Prospectus [Line Items]
Maximum Sales Charge Imposed on Purchases (as a percentage of Offering Price)	0.00%
Maximum Deferred Sales Charge (as a percentage)	0.00%
Redemption Fee (as a percentage of Amount Redeemed)	0.00%
Aggressive Allocation Fund \| Aggressive Allocation Fund Class II
Prospectus [Line Items]
Maximum Sales Charge Imposed on Purchases (as a percentage of Offering Price)	0.00%
Maximum Deferred Sales Charge (as a percentage)	0.00%
Redemption Fee (as a percentage of Amount Redeemed)	0.00%
Diversified Income Fund \| Diversified Income Fund Class I
Prospectus [Line Items]
Maximum Sales Charge Imposed on Purchases (as a percentage of Offering Price)	0.00%
Maximum Deferred Sales Charge (as a percentage)	0.00%
Redemption Fee (as a percentage of Amount Redeemed)	0.00%
Diversified Income Fund \| Diversified Income Fund Class II
Prospectus [Line Items]
Maximum Sales Charge Imposed on Purchases (as a percentage of Offering Price)	0.00%
Maximum Deferred Sales Charge (as a percentage)	0.00%
Redemption Fee (as a percentage of Amount Redeemed)	0.00%
Core Bond Fund \| Core Bond Fund Class I
Prospectus [Line Items]
Maximum Sales Charge Imposed on Purchases (as a percentage of Offering Price)	0.00%
Maximum Deferred Sales Charge (as a percentage)	0.00%
Redemption Fee (as a percentage of Amount Redeemed)	0.00%
Core Bond Fund \| Core Bond Fund Class II
Prospectus [Line Items]
Maximum Sales Charge Imposed on Purchases (as a percentage of Offering Price)	0.00%
Maximum Deferred Sales Charge (as a percentage)	0.00%
Redemption Fee (as a percentage of Amount Redeemed)	0.00%
Large Cap Value Fund \| Large Cap Value Fund Class I
Prospectus [Line Items]
Maximum Sales Charge Imposed on Purchases (as a percentage of Offering Price)	0.00%
Maximum Deferred Sales Charge (as a percentage)	0.00%
Redemption Fee (as a percentage of Amount Redeemed)	0.00%
Large Cap Value Fund \| Large Cap Value Fund Class II
Prospectus [Line Items]
Maximum Sales Charge Imposed on Purchases (as a percentage of Offering Price)	0.00%
Maximum Deferred Sales Charge (as a percentage)	0.00%
Redemption Fee (as a percentage of Amount Redeemed)	0.00%
Large Cap Growth Fund \| Large Cap Growth Fund Class I
Prospectus [Line Items]
Maximum Sales Charge Imposed on Purchases (as a percentage of Offering Price)	0.00%
Maximum Deferred Sales Charge (as a percentage)	0.00%
Redemption Fee (as a percentage of Amount Redeemed)	0.00%
Large Cap Growth Fund \| Large Cap Growth Fund Class II
Prospectus [Line Items]
Maximum Sales Charge Imposed on Purchases (as a percentage of Offering Price)	0.00%
Maximum Deferred Sales Charge (as a percentage)	0.00%
Redemption Fee (as a percentage of Amount Redeemed)	0.00%
Mid Cap Fund \| Mid Cap Fund Class I
Prospectus [Line Items]
Maximum Sales Charge Imposed on Purchases (as a percentage of Offering Price)	0.00%
Maximum Deferred Sales Charge (as a percentage)	0.00%
Redemption Fee (as a percentage of Amount Redeemed)	0.00%
Mid Cap Fund \| Mid Cap Fund Class II
Prospectus [Line Items]
Maximum Sales Charge Imposed on Purchases (as a percentage of Offering Price)	0.00%
Maximum Deferred Sales Charge (as a percentage)	0.00%
Redemption Fee (as a percentage of Amount Redeemed)	0.00%
Madison Target Retirement 2020 Fund \| Madison Target Retirement 2020 Fund Class I
Prospectus [Line Items]
Maximum Sales Charge Imposed on Purchases (as a percentage of Offering Price)	0.00%
Maximum Deferred Sales Charge (as a percentage)	0.00%
Redemption Fee (as a percentage of Amount Redeemed)	0.00%
Madison Target Retirement 2030 Fund \| Madison Target Retirement 2030 Fund Class I
Prospectus [Line Items]
Maximum Sales Charge Imposed on Purchases (as a percentage of Offering Price)	0.00%
Maximum Deferred Sales Charge (as a percentage)	0.00%
Redemption Fee (as a percentage of Amount Redeemed)	0.00%
Madison Target Retirement 2040 Fund \| Madison Target Retirement 2040 Fund Class I
Prospectus [Line Items]
Maximum Sales Charge Imposed on Purchases (as a percentage of Offering Price)	0.00%
Maximum Deferred Sales Charge (as a percentage)	0.00%
Redemption Fee (as a percentage of Amount Redeemed)	0.00%
Madison Target Retirement 2050 Fund \| Madison Target Retirement 2050 Fund Class I
Prospectus [Line Items]
Maximum Sales Charge Imposed on Purchases (as a percentage of Offering Price)	0.00%
Maximum Deferred Sales Charge (as a percentage)	0.00%
Redemption Fee (as a percentage of Amount Redeemed)	0.00%

Prospectus [Line Items]

Maximum Deferred Sales Charge (as a percentage)

0.00%