v3.26.1
Shareholder Report, Line Graph (Details) - USD ($)
 3 Months Ended 6 Months Ended 9 Months Ended 12 Months Ended 15 Months Ended 18 Months Ended 21 Months Ended 24 Months Ended 27 Months Ended 30 Months Ended 33 Months Ended 36 Months Ended 39 Months Ended 42 Months Ended 45 Months Ended 48 Months Ended 51 Months Ended 54 Months Ended 57 Months Ended 60 Months Ended 63 Months Ended 66 Months Ended 69 Months Ended 72 Months Ended 75 Months Ended 78 Months Ended 81 Months Ended 84 Months Ended 87 Months Ended 90 Months Ended 93 Months Ended 96 Months Ended 99 Months Ended 102 Months Ended 105 Months Ended 108 Months Ended 111 Months Ended 114 Months Ended 117 Months Ended 120 Months Ended
May 31, 2016
Aug. 31, 2016
Nov. 30, 2016
Feb. 28, 2017
May 31, 2017
Aug. 31, 2017
Nov. 30, 2017
Feb. 28, 2018
May 31, 2018
Aug. 31, 2018
Nov. 30, 2018
Feb. 28, 2019
May 31, 2019
Aug. 31, 2019
Nov. 30, 2019
Feb. 29, 2020
May 31, 2020
Aug. 31, 2020
Nov. 30, 2020
Feb. 28, 2021
May 31, 2021
Aug. 31, 2021
Nov. 30, 2021
Feb. 28, 2022
May 31, 2022
Aug. 31, 2022
Nov. 30, 2022
Feb. 28, 2023
May 31, 2023
Aug. 31, 2023
Nov. 30, 2023
Feb. 29, 2024
May 31, 2024
Aug. 31, 2024
Nov. 30, 2024
Feb. 28, 2025
May 31, 2025
Aug. 31, 2025
Nov. 30, 2025
Feb. 28, 2026
May 31, 2026
C000129670                                                                                  
Account Value [Line Items]                                                                                  
Accumulated Value $ 10,000 $ 10,395 $ 10,332 $ 10,946 $ 11,439 $ 11,784 $ 12,268 $ 12,431 $ 12,421 $ 12,700 $ 12,171 $ 12,600 $ 12,611 $ 13,180 $ 13,719 $ 13,379 $ 13,358 $ 14,829 $ 15,645 $ 16,588 $ 17,570 $ 18,181 $ 17,875 $ 17,162 $ 16,122 $ 15,420 $ 15,771 $ 15,729 $ 16,041 $ 16,760 $ 16,915 $ 18,184 $ 18,729 $ 19,632 $ 20,127 $ 20,101 $ 20,294 $ 21,424 $ 22,233 $ 23,348 $ 24,023
C000129671                                                                                  
Account Value [Line Items]                                                                                  
Accumulated Value 10,000 10,396 10,324 10,928 11,413 11,757 12,223 12,376 12,356 12,635 12,097 12,512 12,522 13,079 13,605 13,258 13,237 14,675 15,473 16,386 17,359 17,954 17,629 16,924 15,884 15,180 15,515 15,469 15,775 16,469 16,599 17,839 18,361 19,234 19,707 19,667 19,843 20,936 21,714 22,797 23,429
C000169046                                                                                  
Account Value [Line Items]                                                                                  
Accumulated Value 500,000 520,197 517,056 548,219 572,460 590,174 614,415 622,994 622,512 636,967 610,467 632,556 633,066 662,143 689,180 672,647 672,116 745,969 787,411 834,775 885,201 916,444 901,096 865,148 813,319 778,576 796,232 794,640 810,968 847,858 855,719 919,973 948,135 994,447 1,020,106 1,018,738 1,029,154 1,086,437 1,128,098 1,185,577 1,219,850
Russell 3000 Index                                                                                  
Account Value [Line Items]                                                                                  
Accumulated Value 10,000 10,445 10,693 11,520 11,769 12,123 13,074 13,389 13,542 14,577 13,797 14,065 13,880 14,768 15,934 15,036 15,471 17,935 18,966 20,347 22,264 23,861 23,961 22,849 21,444 20,692 21,373 21,004 21,880 23,745 24,067 27,012 27,916 29,953 32,367 31,748 31,578 34,698 36,765 37,150 40,876
Russell 3000 Index                                                                                  
Account Value [Line Items]                                                                                  
Accumulated Value 10,000 10,445 10,693 11,520 11,769 12,123 13,074 13,389 13,542 14,577 13,797 14,065 13,880 14,768 15,934 15,036 15,471 17,935 18,966 20,347 22,264 23,861 23,961 22,849 21,444 20,692 21,373 21,004 21,880 23,745 24,067 27,012 27,916 29,953 32,367 31,748 31,578 34,698 36,765 37,150 40,876
Russell 3000 Index                                                                                  
Account Value [Line Items]                                                                                  
Accumulated Value 500,000 522,241 534,647 575,993 588,456 606,127 653,724 669,441 677,086 728,858 689,853 703,243 693,987 738,405 796,715 751,784 773,543 896,730 948,279 1,017,369 1,113,218 1,193,037 1,198,049 1,142,441 1,072,208 1,034,579 1,068,629 1,050,213 1,094,023 1,187,255 1,203,368 1,350,596 1,395,788 1,497,655 1,618,354 1,587,401 1,578,892 1,734,883 1,838,256 1,857,519 2,043,802
S&P Target Date 2035 Index                                                                                  
Account Value [Line Items]                                                                                  
Accumulated Value 10,000 10,364 10,366 10,980 11,350 11,648 12,298 12,451 12,526 12,944 12,312 12,639 12,514 13,042 13,793 13,164 13,161 14,567 15,379 16,259 17,402 17,984 17,731 17,234 16,346 15,622 16,043 16,143 16,436 17,198 17,353 18,670 19,186 20,269 20,727 20,756 21,152 22,529 23,492 24,656 25,739
S&P Target Date 2035 Index                                                                                  
Account Value [Line Items]                                                                                  
Accumulated Value 10,000 10,364 10,366 10,980 11,350 11,648 12,298 12,451 12,526 12,944 12,312 12,639 12,514 13,042 13,793 13,164 13,161 14,567 15,379 16,259 17,402 17,984 17,731 17,234 16,346 15,622 16,043 16,143 16,436 17,198 17,353 18,670 19,186 20,269 20,727 20,756 21,152 22,529 23,492 24,656 25,739
S&P Target Date 2035 Index                                                                                  
Account Value [Line Items]                                                                                  
Accumulated Value $ 500,000 $ 518,223 $ 518,313 $ 549,010 $ 567,499 $ 582,422 $ 614,917 $ 622,529 $ 626,288 $ 647,211 $ 615,607 $ 631,931 $ 625,685 $ 652,092 $ 689,665 $ 658,175 $ 658,056 $ 728,346 $ 768,926 $ 812,960 $ 870,103 $ 899,175 $ 886,541 $ 861,676 $ 817,287 $ 781,088 $ 802,159 $ 807,136 $ 821,822 $ 859,912 $ 867,659 $ 933,503 $ 959,323 $ 1,013,427 $ 1,036,356 $ 1,037,825 $ 1,057,602 $ 1,126,452 $ 1,174,621 $ 1,232,799 $ 1,286,961