v3.26.1
Expense Example
May 01, 2026
USD ($)
Conservative Allocation Fund | Conservative Allocation Fund Class I  
Prospectus [Line Items]  
Expense Example, with Redemption, 1 Year $ 59
Expense Example, with Redemption, 3 Years 186
Expense Example, with Redemption, 5 Years 324
Expense Example, with Redemption, 10 Years 726
Conservative Allocation Fund | Conservative Allocation Fund Class II  
Prospectus [Line Items]  
Expense Example, with Redemption, 1 Year 85
Expense Example, with Redemption, 3 Years 265
Expense Example, with Redemption, 5 Years 460
Expense Example, with Redemption, 10 Years 1,025
Moderate Allocation Fund | Moderate Allocation Fund Class I  
Prospectus [Line Items]  
Expense Example, with Redemption, 1 Year 61
Expense Example, with Redemption, 3 Years 192
Expense Example, with Redemption, 5 Years 335
Expense Example, with Redemption, 10 Years 750
Moderate Allocation Fund | Moderate Allocation Fund Class II  
Prospectus [Line Items]  
Expense Example, with Redemption, 1 Year 87
Expense Example, with Redemption, 3 Years 271
Expense Example, with Redemption, 5 Years 471
Expense Example, with Redemption, 10 Years 1,049
Aggressive Allocation Fund | Aggressive Allocation Fund Class I  
Prospectus [Line Items]  
Expense Example, with Redemption, 1 Year 60
Expense Example, with Redemption, 3 Years 189
Expense Example, with Redemption, 5 Years 329
Expense Example, with Redemption, 10 Years 738
Aggressive Allocation Fund | Aggressive Allocation Fund Class II  
Prospectus [Line Items]  
Expense Example, with Redemption, 1 Year 86
Expense Example, with Redemption, 3 Years 268
Expense Example, with Redemption, 5 Years 466
Expense Example, with Redemption, 10 Years 1,037
Diversified Income Fund | Diversified Income Fund Class I  
Prospectus [Line Items]  
Expense Example, with Redemption, 1 Year 73
Expense Example, with Redemption, 3 Years 227
Expense Example, with Redemption, 5 Years 395
Expense Example, with Redemption, 10 Years 883
Diversified Income Fund | Diversified Income Fund Class II  
Prospectus [Line Items]  
Expense Example, with Redemption, 1 Year 98
Expense Example, with Redemption, 3 Years 306
Expense Example, with Redemption, 5 Years 531
Expense Example, with Redemption, 10 Years 1,178
Core Bond Fund | Core Bond Fund Class I  
Prospectus [Line Items]  
Expense Example, with Redemption, 1 Year 59
Expense Example, with Redemption, 3 Years 186
Expense Example, with Redemption, 5 Years 324
Expense Example, with Redemption, 10 Years 726
Core Bond Fund | Core Bond Fund Class II  
Prospectus [Line Items]  
Expense Example, with Redemption, 1 Year 85
Expense Example, with Redemption, 3 Years 265
Expense Example, with Redemption, 5 Years 460
Expense Example, with Redemption, 10 Years 1,025
Large Cap Value Fund | Large Cap Value Fund Class I  
Prospectus [Line Items]  
Expense Example, with Redemption, 1 Year 63
Expense Example, with Redemption, 3 Years 199
Expense Example, with Redemption, 5 Years 346
Expense Example, with Redemption, 10 Years 774
Large Cap Value Fund | Large Cap Value Fund Class II  
Prospectus [Line Items]  
Expense Example, with Redemption, 1 Year 89
Expense Example, with Redemption, 3 Years 278
Expense Example, with Redemption, 5 Years 482
Expense Example, with Redemption, 10 Years 1,073
Large Cap Growth Fund | Large Cap Growth Fund Class I  
Prospectus [Line Items]  
Expense Example, with Redemption, 1 Year 85
Expense Example, with Redemption, 3 Years 265
Expense Example, with Redemption, 5 Years 460
Expense Example, with Redemption, 10 Years 1,025
Large Cap Growth Fund | Large Cap Growth Fund Class II  
Prospectus [Line Items]  
Expense Example, with Redemption, 1 Year 110
Expense Example, with Redemption, 3 Years 343
Expense Example, with Redemption, 5 Years 595
Expense Example, with Redemption, 10 Years 1,317
Mid Cap Fund | Mid Cap Fund Class I  
Prospectus [Line Items]  
Expense Example, with Redemption, 1 Year 95
Expense Example, with Redemption, 3 Years 296
Expense Example, with Redemption, 5 Years 515
Expense Example, with Redemption, 10 Years 1,143
Mid Cap Fund | Mid Cap Fund Class II  
Prospectus [Line Items]  
Expense Example, with Redemption, 1 Year 120
Expense Example, with Redemption, 3 Years 375
Expense Example, with Redemption, 5 Years 649
Expense Example, with Redemption, 10 Years 1,432
Madison Target Retirement 2020 Fund | Madison Target Retirement 2020 Fund Class I  
Prospectus [Line Items]  
Expense Example, with Redemption, 1 Year 48
Expense Example, with Redemption, 3 Years 151
Expense Example, with Redemption, 5 Years 263
Expense Example, with Redemption, 10 Years 591
Madison Target Retirement 2030 Fund | Madison Target Retirement 2030 Fund Class I  
Prospectus [Line Items]  
Expense Example, with Redemption, 1 Year 48
Expense Example, with Redemption, 3 Years 151
Expense Example, with Redemption, 5 Years 263
Expense Example, with Redemption, 10 Years 591
Madison Target Retirement 2040 Fund | Madison Target Retirement 2040 Fund Class I  
Prospectus [Line Items]  
Expense Example, with Redemption, 1 Year 50
Expense Example, with Redemption, 3 Years 157
Expense Example, with Redemption, 5 Years 274
Expense Example, with Redemption, 10 Years 616
Madison Target Retirement 2050 Fund | Madison Target Retirement 2050 Fund Class I  
Prospectus [Line Items]  
Expense Example, with Redemption, 1 Year 51
Expense Example, with Redemption, 3 Years 160
Expense Example, with Redemption, 5 Years 280
Expense Example, with Redemption, 10 Years $ 628