Shareholder Report, Line Graph (Details) - USD ($) |
May 31, 2025 |
Feb. 28, 2025 |
Nov. 30, 2024 |
Aug. 31, 2024 |
May 31, 2024 |
Feb. 29, 2024 |
Nov. 30, 2023 |
Aug. 31, 2023 |
May 31, 2023 |
Feb. 28, 2023 |
Nov. 30, 2022 |
Aug. 31, 2022 |
May 31, 2022 |
Feb. 28, 2022 |
Nov. 30, 2021 |
Aug. 31, 2021 |
May 31, 2021 |
Feb. 28, 2021 |
Nov. 30, 2020 |
Aug. 31, 2020 |
May 31, 2020 |
Feb. 29, 2020 |
Nov. 30, 2019 |
Aug. 31, 2019 |
May 31, 2019 |
Feb. 28, 2019 |
Nov. 30, 2018 |
Aug. 31, 2018 |
May 31, 2018 |
Feb. 28, 2018 |
Nov. 30, 2017 |
Aug. 31, 2017 |
May 31, 2017 |
Feb. 28, 2017 |
Nov. 30, 2016 |
Aug. 31, 2016 |
May 31, 2016 |
Feb. 29, 2016 |
Feb. 26, 2016 |
Nov. 30, 2015 |
Aug. 31, 2015 |
May 31, 2015 |
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C000129660 | ||||||||||||||||||||||||||||||||||||||||||
Account Value [Line Items] | ||||||||||||||||||||||||||||||||||||||||||
Account Value | $ 16,146 | $ 16,046 | $ 15,949 | $ 15,662 | $ 15,047 | $ 14,760 | $ 14,070 | $ 13,939 | $ 13,635 | $ 13,438 | $ 13,424 | $ 13,376 | $ 13,814 | $ 14,483 | $ 14,887 | $ 15,045 | $ 14,695 | $ 14,152 | $ 13,712 | $ 13,283 | $ 12,372 | $ 12,404 | $ 12,442 | $ 12,151 | $ 11,725 | $ 11,569 | $ 11,227 | $ 11,523 | $ 11,335 | $ 11,335 | $ 11,293 | $ 11,073 | $ 10,863 | $ 10,605 | $ 10,215 | $ 10,355 | $ 10,029 | $ 9,535 | $ 9,782 | $ 9,646 | $ 10,000 | |
C000129661 | ||||||||||||||||||||||||||||||||||||||||||
Account Value [Line Items] | ||||||||||||||||||||||||||||||||||||||||||
Account Value | 15,728 | 15,631 | 15,550 | 15,285 | 14,688 | 14,423 | 13,754 | 13,639 | 13,344 | 13,164 | 13,154 | 13,118 | 13,548 | 14,228 | 14,630 | 14,796 | 14,452 | 13,941 | 13,507 | 13,085 | 12,198 | 12,240 | 12,287 | 12,010 | 11,589 | 11,446 | 11,119 | 11,423 | 11,247 | 11,256 | 11,213 | 11,004 | 10,804 | 10,556 | 10,168 | 10,317 | 10,000 | 9,516 | 9,763 | 9,636 | 10,000 | |
C000169041 | ||||||||||||||||||||||||||||||||||||||||||
Account Value [Line Items] | ||||||||||||||||||||||||||||||||||||||||||
Account Value | 856,118 | 850,842 | 844,800 | 829,650 | 797,186 | 781,314 | 744,142 | 737,194 | 720,518 | 710,096 | 708,684 | 706,126 | 729,152 | 764,970 | 785,099 | 793,400 | 773,832 | 745,369 | 721,697 | 698,634 | 650,821 | 652,509 | 653,932 | 638,674 | 615,786 | 607,612 | 589,111 | 604,628 | 594,801 | 594,801 | 592,549 | 580,538 | 569,527 | 556,015 | 535,122 | 542,439 | 525,366 | 499,512 | $ 500,000 | |||
Bloomberg U.S. Aggregate Bond Index | ||||||||||||||||||||||||||||||||||||||||||
Account Value [Line Items] | ||||||||||||||||||||||||||||||||||||||||||
Account Value | 11,596 | 11,629 | 11,507 | 11,522 | 10,995 | 10,991 | 10,767 | 10,738 | 10,854 | 10,637 | 10,641 | 10,868 | 11,091 | 11,782 | 12,209 | 12,283 | 12,085 | 12,102 | 12,351 | 12,293 | 12,134 | 11,937 | 11,513 | 11,546 | 11,090 | 10,689 | 10,391 | 10,480 | 10,423 | 10,360 | 10,533 | 10,591 | 10,462 | 10,308 | 10,205 | 10,539 | 10,299 | 10,164 | 9,988 | 9,945 | 10,000 | |
Bloomberg U.S. Aggregate Bond Index | ||||||||||||||||||||||||||||||||||||||||||
Account Value [Line Items] | ||||||||||||||||||||||||||||||||||||||||||
Account Value | 11,596 | 11,629 | 11,507 | 11,522 | 10,995 | 10,991 | 10,767 | 10,738 | 10,854 | 10,637 | 10,641 | 10,868 | 11,091 | 11,782 | 12,209 | 12,283 | 12,085 | 12,102 | 12,351 | 12,293 | 12,134 | 11,937 | 11,513 | 11,546 | 11,090 | 10,689 | 10,391 | 10,480 | 10,423 | 10,360 | 10,533 | 10,591 | 10,462 | 10,308 | 10,205 | 10,539 | 10,299 | 10,164 | 9,988 | 9,945 | 10,000 | |
Bloomberg U.S. Aggregate Bond Index | ||||||||||||||||||||||||||||||||||||||||||
Account Value [Line Items] | ||||||||||||||||||||||||||||||||||||||||||
Account Value | 571,213 | 572,865 | 566,851 | 567,585 | 541,645 | 541,418 | 530,386 | 528,986 | 534,665 | 523,984 | 524,202 | 535,374 | 546,373 | 580,411 | 601,422 | 605,052 | 595,320 | 596,175 | 608,440 | 605,562 | 597,740 | 588,039 | 567,131 | 568,745 | 546,303 | 526,526 | 511,892 | 516,232 | 513,441 | 510,349 | 518,855 | 521,706 | 515,371 | 507,785 | 502,698 | 519,149 | 507,362 | 500,699 | 500,000 | |||
S&P Target Date 2010 Index | ||||||||||||||||||||||||||||||||||||||||||
Account Value [Line Items] | ||||||||||||||||||||||||||||||||||||||||||
Account Value | 15,967 | 15,783 | 15,645 | 15,469 | 14,772 | 14,532 | 13,893 | 13,783 | 13,527 | 13,284 | 13,203 | 13,092 | 13,466 | 14,108 | 14,473 | 14,590 | 14,250 | 13,790 | 13,534 | 13,159 | 12,430 | 12,287 | 12,383 | 12,056 | 11,624 | 11,509 | 11,239 | 11,545 | 11,320 | 11,261 | 11,239 | 10,956 | 10,775 | 10,543 | 10,196 | 10,302 | 10,029 | 9,603 | 9,846 | 9,677 | 10,000 | |
S&P Target Date 2010 Index | ||||||||||||||||||||||||||||||||||||||||||
Account Value [Line Items] | ||||||||||||||||||||||||||||||||||||||||||
Account Value | 15,967 | 15,783 | 15,645 | 15,469 | 14,772 | 14,532 | 13,893 | 13,783 | 13,527 | 13,284 | 13,203 | 13,092 | 13,466 | 14,108 | 14,473 | 14,590 | 14,250 | 13,790 | 13,534 | 13,159 | 12,430 | 12,287 | 12,383 | 12,056 | 11,624 | 11,509 | 11,239 | 11,545 | 11,320 | 11,261 | 11,239 | 10,956 | 10,775 | 10,543 | 10,196 | 10,302 | 10,029 | 9,603 | $ 9,846 | $ 9,677 | $ 10,000 | |
S&P Target Date 2010 Index | ||||||||||||||||||||||||||||||||||||||||||
Account Value [Line Items] | ||||||||||||||||||||||||||||||||||||||||||
Account Value | $ 830,028 | $ 820,513 | $ 813,301 | $ 804,171 | $ 767,933 | $ 755,442 | $ 722,259 | $ 716,496 | $ 703,212 | $ 690,552 | $ 686,360 | $ 680,569 | $ 700,028 | $ 733,410 | $ 752,367 | $ 758,456 | $ 740,769 | $ 716,895 | $ 703,560 | $ 684,102 | $ 646,172 | $ 638,746 | $ 643,761 | $ 626,723 | $ 604,293 | $ 598,311 | $ 584,264 | $ 600,181 | $ 588,475 | $ 585,414 | $ 584,280 | $ 569,561 | $ 560,124 | $ 548,104 | $ 530,055 | $ 535,537 | $ 521,368 | $ 499,238 | $ 500,000 |