v3.25.4
S000003998 [Member] Average Annual Total Returns
 12 Months Ended 60 Months Ended 120 Months Ended
Dec. 31, 2025
Dec. 31, 2025
Dec. 31, 2025
Russell 3000 Index (no deduction for fees, expenses or taxes)      
Prospectus [Line Items]      
Average Annual Return, Percent 17.15% 13.15% 14.29%
Bloomberg U.S. Aggregate Index (no deduction for fees, expenses or taxes)      
Prospectus [Line Items]      
Average Annual Return, Percent 7.30% (0.36%) 2.01%
S&P Target Date To 2040 Index (no deduction for fees, expenses or taxes)      
Prospectus [Line Items]      
Average Annual Return, Percent 17.26% 8.69% 9.52%
Class R4 Shares      
Prospectus [Line Items]      
Average Annual Return, Percent [1] 11.03% 7.86% 8.13%
Class R3 Shares      
Prospectus [Line Items]      
Average Annual Return, Percent [2] 10.76% 7.60% 7.86%
Class R5 Shares      
Prospectus [Line Items]      
Average Annual Return, Percent [3] 11.22% 8.02% 8.29%
Class A Shares      
Prospectus [Line Items]      
Average Annual Return, Percent 4.59% 6.49% 7.35%
Class A Shares | After Taxes on Distributions      
Prospectus [Line Items]      
Average Annual Return, Percent 3.79% 4.49% 5.71%
Class A Shares | After Taxes on Distributions and Sales      
Prospectus [Line Items]      
Average Annual Return, Percent 2.84% 4.36% 5.31%
Class C Shares      
Prospectus [Line Items]      
Average Annual Return, Percent 9.09% 6.94% 7.35%
Class R Shares      
Prospectus [Line Items]      
Average Annual Return, Percent 10.46% 7.32% 7.64%
Class Y Shares      
Prospectus [Line Items]      
Average Annual Return, Percent 11.23% 8.02% 8.26%
Class R6 Shares      
Prospectus [Line Items]      
Average Annual Return, Percent [4] 11.33% 8.13% 8.35%
[1]
Performance for class R4 shares prior to their inception (1/4/21) is derived from the historical performance of class Y shares, adjusted for the higher investor servicing fees applicable to class R4 shares (relative to the comparable fees applicable to class Y shares prior to the inception of class R4 shares).
[2]
Performance for class R3 shares prior to their inception (1/4/21) is derived from the historical performance of class Y shares, adjusted for the higher 12b-1 fees and investor servicing fees applicable to class R3 shares (relative to the comparable fees applicable to class Y shares prior to the inception of class R3 shares).
[3]
Performance for class R5 shares prior to their inception (1/4/21) is derived from the historical performance of class R6 shares, adjusted for the higher investor servicing fees applicable to class R5 shares (relative to the comparable fees applicable to R6 shares prior to the inception of class R5 shares).
[4]
Performance for class R6 shares prior to their inception (9/1/16) is derived from the historical performance of class Y shares and has not been adjusted for the lower investor servicing fees applicable to class R6 shares (relative to the comparable fees applicable to class Y shares prior to the inception of class R6 shares); had it been adjusted, returns would have been higher.