v3.26.3
Policyholder Contract Deposits and Other Policyholder Funds - Account balances by guaranteed minimum interest rates (Details) - USD ($)
$ in Millions
Sep. 30, 2026
Sep. 30, 2025
Policyholder Account Balance [Line Items]    
Policyholder account balance $ 105,456 $ 106,674
Policyholder account balance, percentage 100.00% 100.00%
At Guaranteed Minimum    
Policyholder Account Balance [Line Items]    
Policyholder account balance $ 43,410 $ 47,569
Policyholder account balance, percentage 41.00% 45.00%
1 Basis Point - 50 Basis Points Above    
Policyholder Account Balance [Line Items]    
Policyholder account balance $ 4,167 $ 4,310
Policyholder account balance, percentage 4.00% 4.00%
More than 50 Basis Points Above Minimum Guarantee    
Policyholder Account Balance [Line Items]    
Policyholder account balance $ 57,879 $ 54,795
Policyholder account balance, percentage 55.00% 51.00%
Individual Retirement    
Policyholder Account Balance [Line Items]    
Policyholder account balance $ 60,480 $ 59,431
Individual Retirement | Policyholder Account Balance, Guaranteed Minimum Crediting Rate, Range Less Than 1%    
Policyholder Account Balance [Line Items]    
Minimum credit rating (as a percent) 1.00% 1.00%
Policyholder account balance $ 42,826 $ 40,958
Individual Retirement | Policyholder Account Balance, Guaranteed Minimum Crediting Rate, Range From 1% To 2%    
Policyholder Account Balance [Line Items]    
Policyholder account balance $ 2,386 $ 2,968
Individual Retirement | Policyholder Account Balance, Guaranteed Minimum Crediting Rate, Range From 1% To 2% | Minimum    
Policyholder Account Balance [Line Items]    
Minimum credit rating (as a percent) 1.00% 1.00%
Individual Retirement | Policyholder Account Balance, Guaranteed Minimum Crediting Rate, Range From 1% To 2% | Maximum    
Policyholder Account Balance [Line Items]    
Minimum credit rating (as a percent) 2.00% 2.00%
Individual Retirement | Policyholder Account Balance, Guaranteed Minimum Crediting Rate, Range From 2% To 3%    
Policyholder Account Balance [Line Items]    
Policyholder account balance $ 10,213 $ 9,867
Individual Retirement | Policyholder Account Balance, Guaranteed Minimum Crediting Rate, Range From 2% To 3% | Minimum    
Policyholder Account Balance [Line Items]    
Minimum credit rating (as a percent) 2.00% 2.00%
Individual Retirement | Policyholder Account Balance, Guaranteed Minimum Crediting Rate, Range From 2% To 3% | Maximum    
Policyholder Account Balance [Line Items]    
Minimum credit rating (as a percent) 3.00% 3.00%
Individual Retirement | Policyholder Account Balance, Guaranteed Minimum Crediting Rate, Range From 3% To 4%    
Policyholder Account Balance [Line Items]    
Policyholder account balance $ 4,657 $ 5,210
Individual Retirement | Policyholder Account Balance, Guaranteed Minimum Crediting Rate, Range From 3% To 4% | Minimum    
Policyholder Account Balance [Line Items]    
Minimum credit rating (as a percent) 3.00% 3.00%
Individual Retirement | Policyholder Account Balance, Guaranteed Minimum Crediting Rate, Range From 3% To 4% | Maximum    
Policyholder Account Balance [Line Items]    
Minimum credit rating (as a percent) 4.00% 4.00%
Individual Retirement | Policyholder Account Balance, Guaranteed Minimum Crediting Rate, Range From 4% To 5%    
Policyholder Account Balance [Line Items]    
Policyholder account balance $ 368 $ 396
Individual Retirement | Policyholder Account Balance, Guaranteed Minimum Crediting Rate, Range From 4% To 5% | Minimum    
Policyholder Account Balance [Line Items]    
Minimum credit rating (as a percent) 4.00% 4.00%
Individual Retirement | Policyholder Account Balance, Guaranteed Minimum Crediting Rate, Range From 4% To 5% | Maximum    
Policyholder Account Balance [Line Items]    
Minimum credit rating (as a percent) 5.00% 5.00%
Individual Retirement | Policyholder Account Balance, Guaranteed Minimum Crediting Rate, Greater than 5%    
Policyholder Account Balance [Line Items]    
Minimum credit rating (as a percent) 5.00% 5.00%
Policyholder account balance $ 30 $ 32
Individual Retirement | At Guaranteed Minimum    
Policyholder Account Balance [Line Items]    
Policyholder account balance 14,658 16,364
Individual Retirement | At Guaranteed Minimum | Policyholder Account Balance, Guaranteed Minimum Crediting Rate, Range Less Than 1%    
Policyholder Account Balance [Line Items]    
Policyholder account balance 2,505 2,865
Individual Retirement | At Guaranteed Minimum | Policyholder Account Balance, Guaranteed Minimum Crediting Rate, Range From 1% To 2%    
Policyholder Account Balance [Line Items]    
Policyholder account balance 1,716 2,027
Individual Retirement | At Guaranteed Minimum | Policyholder Account Balance, Guaranteed Minimum Crediting Rate, Range From 2% To 3%    
Policyholder Account Balance [Line Items]    
Policyholder account balance 5,421 5,877
Individual Retirement | At Guaranteed Minimum | Policyholder Account Balance, Guaranteed Minimum Crediting Rate, Range From 3% To 4%    
Policyholder Account Balance [Line Items]    
Policyholder account balance 4,622 5,173
Individual Retirement | At Guaranteed Minimum | Policyholder Account Balance, Guaranteed Minimum Crediting Rate, Range From 4% To 5%    
Policyholder Account Balance [Line Items]    
Policyholder account balance 364 392
Individual Retirement | At Guaranteed Minimum | Policyholder Account Balance, Guaranteed Minimum Crediting Rate, Greater than 5%    
Policyholder Account Balance [Line Items]    
Policyholder account balance 30 30
Individual Retirement | 1 Basis Point - 50 Basis Points Above    
Policyholder Account Balance [Line Items]    
Policyholder account balance 1,352 1,321
Individual Retirement | 1 Basis Point - 50 Basis Points Above | Policyholder Account Balance, Guaranteed Minimum Crediting Rate, Range Less Than 1%    
Policyholder Account Balance [Line Items]    
Policyholder account balance 1,146 1,104
Individual Retirement | 1 Basis Point - 50 Basis Points Above | Policyholder Account Balance, Guaranteed Minimum Crediting Rate, Range From 1% To 2%    
Policyholder Account Balance [Line Items]    
Policyholder account balance 44 47
Individual Retirement | 1 Basis Point - 50 Basis Points Above | Policyholder Account Balance, Guaranteed Minimum Crediting Rate, Range From 2% To 3%    
Policyholder Account Balance [Line Items]    
Policyholder account balance 131 137
Individual Retirement | 1 Basis Point - 50 Basis Points Above | Policyholder Account Balance, Guaranteed Minimum Crediting Rate, Range From 3% To 4%    
Policyholder Account Balance [Line Items]    
Policyholder account balance 31 33
Individual Retirement | 1 Basis Point - 50 Basis Points Above | Policyholder Account Balance, Guaranteed Minimum Crediting Rate, Range From 4% To 5%    
Policyholder Account Balance [Line Items]    
Policyholder account balance 0 0
Individual Retirement | 1 Basis Point - 50 Basis Points Above | Policyholder Account Balance, Guaranteed Minimum Crediting Rate, Greater than 5%    
Policyholder Account Balance [Line Items]    
Policyholder account balance 0 0
Individual Retirement | More than 50 Basis Points Above Minimum Guarantee    
Policyholder Account Balance [Line Items]    
Policyholder account balance 44,470 41,746
Individual Retirement | More than 50 Basis Points Above Minimum Guarantee | Policyholder Account Balance, Guaranteed Minimum Crediting Rate, Range Less Than 1%    
Policyholder Account Balance [Line Items]    
Policyholder account balance 39,175 36,989
Individual Retirement | More than 50 Basis Points Above Minimum Guarantee | Policyholder Account Balance, Guaranteed Minimum Crediting Rate, Range From 1% To 2%    
Policyholder Account Balance [Line Items]    
Policyholder account balance 626 894
Individual Retirement | More than 50 Basis Points Above Minimum Guarantee | Policyholder Account Balance, Guaranteed Minimum Crediting Rate, Range From 2% To 3%    
Policyholder Account Balance [Line Items]    
Policyholder account balance 4,661 3,853
Individual Retirement | More than 50 Basis Points Above Minimum Guarantee | Policyholder Account Balance, Guaranteed Minimum Crediting Rate, Range From 3% To 4%    
Policyholder Account Balance [Line Items]    
Policyholder account balance 4 4
Individual Retirement | More than 50 Basis Points Above Minimum Guarantee | Policyholder Account Balance, Guaranteed Minimum Crediting Rate, Range From 4% To 5%    
Policyholder Account Balance [Line Items]    
Policyholder account balance 4 4
Individual Retirement | More than 50 Basis Points Above Minimum Guarantee | Policyholder Account Balance, Guaranteed Minimum Crediting Rate, Greater than 5%    
Policyholder Account Balance [Line Items]    
Policyholder account balance 0 2
Group Retirement    
Policyholder Account Balance [Line Items]    
Policyholder account balance $ 32,854 $ 34,368
Group Retirement | Policyholder Account Balance, Guaranteed Minimum Crediting Rate, Range Less Than 1%    
Policyholder Account Balance [Line Items]    
Minimum credit rating (as a percent) 1.00% 1.00%
Policyholder account balance $ 13,026 $ 12,744
Group Retirement | Policyholder Account Balance, Guaranteed Minimum Crediting Rate, Range From 1% To 2%    
Policyholder Account Balance [Line Items]    
Policyholder account balance $ 3,960 $ 4,359
Group Retirement | Policyholder Account Balance, Guaranteed Minimum Crediting Rate, Range From 1% To 2% | Minimum    
Policyholder Account Balance [Line Items]    
Minimum credit rating (as a percent) 1.00% 1.00%
Group Retirement | Policyholder Account Balance, Guaranteed Minimum Crediting Rate, Range From 1% To 2% | Maximum    
Policyholder Account Balance [Line Items]    
Minimum credit rating (as a percent) 2.00% 2.00%
Group Retirement | Policyholder Account Balance, Guaranteed Minimum Crediting Rate, Range From 2% To 3%    
Policyholder Account Balance [Line Items]    
Policyholder account balance $ 9,522 $ 10,490
Group Retirement | Policyholder Account Balance, Guaranteed Minimum Crediting Rate, Range From 2% To 3% | Minimum    
Policyholder Account Balance [Line Items]    
Minimum credit rating (as a percent) 2.00% 2.00%
Group Retirement | Policyholder Account Balance, Guaranteed Minimum Crediting Rate, Range From 2% To 3% | Maximum    
Policyholder Account Balance [Line Items]    
Minimum credit rating (as a percent) 3.00% 3.00%
Group Retirement | Policyholder Account Balance, Guaranteed Minimum Crediting Rate, Range From 3% To 4%    
Policyholder Account Balance [Line Items]    
Policyholder account balance $ 484 $ 534
Group Retirement | Policyholder Account Balance, Guaranteed Minimum Crediting Rate, Range From 3% To 4% | Minimum    
Policyholder Account Balance [Line Items]    
Minimum credit rating (as a percent) 3.00% 3.00%
Group Retirement | Policyholder Account Balance, Guaranteed Minimum Crediting Rate, Range From 3% To 4% | Maximum    
Policyholder Account Balance [Line Items]    
Minimum credit rating (as a percent) 4.00% 4.00%
Group Retirement | Policyholder Account Balance, Guaranteed Minimum Crediting Rate, Range From 4% To 5%    
Policyholder Account Balance [Line Items]    
Policyholder account balance $ 5,745 $ 6,113
Group Retirement | Policyholder Account Balance, Guaranteed Minimum Crediting Rate, Range From 4% To 5% | Minimum    
Policyholder Account Balance [Line Items]    
Minimum credit rating (as a percent) 4.00% 4.00%
Group Retirement | Policyholder Account Balance, Guaranteed Minimum Crediting Rate, Range From 4% To 5% | Maximum    
Policyholder Account Balance [Line Items]    
Minimum credit rating (as a percent) 5.00% 5.00%
Group Retirement | Policyholder Account Balance, Guaranteed Minimum Crediting Rate, Greater than 5%    
Policyholder Account Balance [Line Items]    
Minimum credit rating (as a percent) 5.00% 5.00%
Policyholder account balance $ 117 $ 128
Group Retirement | At Guaranteed Minimum    
Policyholder Account Balance [Line Items]    
Policyholder account balance 20,040 21,785
Group Retirement | At Guaranteed Minimum | Policyholder Account Balance, Guaranteed Minimum Crediting Rate, Range Less Than 1%    
Policyholder Account Balance [Line Items]    
Policyholder account balance 1,845 1,953
Group Retirement | At Guaranteed Minimum | Policyholder Account Balance, Guaranteed Minimum Crediting Rate, Range From 1% To 2%    
Policyholder Account Balance [Line Items]    
Policyholder account balance 2,783 3,052
Group Retirement | At Guaranteed Minimum | Policyholder Account Balance, Guaranteed Minimum Crediting Rate, Range From 2% To 3%    
Policyholder Account Balance [Line Items]    
Policyholder account balance 9,066 10,005
Group Retirement | At Guaranteed Minimum | Policyholder Account Balance, Guaranteed Minimum Crediting Rate, Range From 3% To 4%    
Policyholder Account Balance [Line Items]    
Policyholder account balance 484 534
Group Retirement | At Guaranteed Minimum | Policyholder Account Balance, Guaranteed Minimum Crediting Rate, Range From 4% To 5%    
Policyholder Account Balance [Line Items]    
Policyholder account balance 5,745 6,113
Group Retirement | At Guaranteed Minimum | Policyholder Account Balance, Guaranteed Minimum Crediting Rate, Greater than 5%    
Policyholder Account Balance [Line Items]    
Policyholder account balance 117 128
Group Retirement | 1 Basis Point - 50 Basis Points Above    
Policyholder Account Balance [Line Items]    
Policyholder account balance 2,054 2,260
Group Retirement | 1 Basis Point - 50 Basis Points Above | Policyholder Account Balance, Guaranteed Minimum Crediting Rate, Range Less Than 1%    
Policyholder Account Balance [Line Items]    
Policyholder account balance 1,389 1,396
Group Retirement | 1 Basis Point - 50 Basis Points Above | Policyholder Account Balance, Guaranteed Minimum Crediting Rate, Range From 1% To 2%    
Policyholder Account Balance [Line Items]    
Policyholder account balance 387 503
Group Retirement | 1 Basis Point - 50 Basis Points Above | Policyholder Account Balance, Guaranteed Minimum Crediting Rate, Range From 2% To 3%    
Policyholder Account Balance [Line Items]    
Policyholder account balance 278 361
Group Retirement | 1 Basis Point - 50 Basis Points Above | Policyholder Account Balance, Guaranteed Minimum Crediting Rate, Range From 3% To 4%    
Policyholder Account Balance [Line Items]    
Policyholder account balance 0 0
Group Retirement | 1 Basis Point - 50 Basis Points Above | Policyholder Account Balance, Guaranteed Minimum Crediting Rate, Range From 4% To 5%    
Policyholder Account Balance [Line Items]    
Policyholder account balance 0 0
Group Retirement | 1 Basis Point - 50 Basis Points Above | Policyholder Account Balance, Guaranteed Minimum Crediting Rate, Greater than 5%    
Policyholder Account Balance [Line Items]    
Policyholder account balance 0 0
Group Retirement | More than 50 Basis Points Above Minimum Guarantee    
Policyholder Account Balance [Line Items]    
Policyholder account balance 10,760 10,323
Group Retirement | More than 50 Basis Points Above Minimum Guarantee | Policyholder Account Balance, Guaranteed Minimum Crediting Rate, Range Less Than 1%    
Policyholder Account Balance [Line Items]    
Policyholder account balance 9,792 9,395
Group Retirement | More than 50 Basis Points Above Minimum Guarantee | Policyholder Account Balance, Guaranteed Minimum Crediting Rate, Range From 1% To 2%    
Policyholder Account Balance [Line Items]    
Policyholder account balance 790 804
Group Retirement | More than 50 Basis Points Above Minimum Guarantee | Policyholder Account Balance, Guaranteed Minimum Crediting Rate, Range From 2% To 3%    
Policyholder Account Balance [Line Items]    
Policyholder account balance 178 124
Group Retirement | More than 50 Basis Points Above Minimum Guarantee | Policyholder Account Balance, Guaranteed Minimum Crediting Rate, Range From 3% To 4%    
Policyholder Account Balance [Line Items]    
Policyholder account balance 0 0
Group Retirement | More than 50 Basis Points Above Minimum Guarantee | Policyholder Account Balance, Guaranteed Minimum Crediting Rate, Range From 4% To 5%    
Policyholder Account Balance [Line Items]    
Policyholder account balance 0 0
Group Retirement | More than 50 Basis Points Above Minimum Guarantee | Policyholder Account Balance, Guaranteed Minimum Crediting Rate, Greater than 5%    
Policyholder Account Balance [Line Items]    
Policyholder account balance 0 0
Life Insurance    
Policyholder Account Balance [Line Items]    
Policyholder account balance $ 6,525 $ 6,774
Life Insurance | Policyholder Account Balance, Guaranteed Minimum Crediting Rate, Range Less Than 1%    
Policyholder Account Balance [Line Items]    
Minimum credit rating (as a percent) 1.00% 1.00%
Policyholder account balance $ 0 $ 0
Life Insurance | Policyholder Account Balance, Guaranteed Minimum Crediting Rate, Range From 1% To 2%    
Policyholder Account Balance [Line Items]    
Policyholder account balance $ 468 $ 473
Life Insurance | Policyholder Account Balance, Guaranteed Minimum Crediting Rate, Range From 1% To 2% | Minimum    
Policyholder Account Balance [Line Items]    
Minimum credit rating (as a percent) 1.00% 1.00%
Life Insurance | Policyholder Account Balance, Guaranteed Minimum Crediting Rate, Range From 1% To 2% | Maximum    
Policyholder Account Balance [Line Items]    
Minimum credit rating (as a percent) 2.00% 2.00%
Life Insurance | Policyholder Account Balance, Guaranteed Minimum Crediting Rate, Range From 2% To 3%    
Policyholder Account Balance [Line Items]    
Policyholder account balance $ 1,833 $ 1,888
Life Insurance | Policyholder Account Balance, Guaranteed Minimum Crediting Rate, Range From 2% To 3% | Minimum    
Policyholder Account Balance [Line Items]    
Minimum credit rating (as a percent) 2.00% 2.00%
Life Insurance | Policyholder Account Balance, Guaranteed Minimum Crediting Rate, Range From 2% To 3% | Maximum    
Policyholder Account Balance [Line Items]    
Minimum credit rating (as a percent) 3.00% 3.00%
Life Insurance | Policyholder Account Balance, Guaranteed Minimum Crediting Rate, Range From 3% To 4%    
Policyholder Account Balance [Line Items]    
Policyholder account balance $ 1,526 $ 1,578
Life Insurance | Policyholder Account Balance, Guaranteed Minimum Crediting Rate, Range From 3% To 4% | Minimum    
Policyholder Account Balance [Line Items]    
Minimum credit rating (as a percent) 3.00% 3.00%
Life Insurance | Policyholder Account Balance, Guaranteed Minimum Crediting Rate, Range From 3% To 4% | Maximum    
Policyholder Account Balance [Line Items]    
Minimum credit rating (as a percent) 4.00% 4.00%
Life Insurance | Policyholder Account Balance, Guaranteed Minimum Crediting Rate, Range From 4% To 5%    
Policyholder Account Balance [Line Items]    
Policyholder account balance $ 2,504 $ 2,631
Life Insurance | Policyholder Account Balance, Guaranteed Minimum Crediting Rate, Range From 4% To 5% | Minimum    
Policyholder Account Balance [Line Items]    
Minimum credit rating (as a percent) 4.00% 4.00%
Life Insurance | Policyholder Account Balance, Guaranteed Minimum Crediting Rate, Range From 4% To 5% | Maximum    
Policyholder Account Balance [Line Items]    
Minimum credit rating (as a percent) 5.00% 5.00%
Life Insurance | Policyholder Account Balance, Guaranteed Minimum Crediting Rate, Greater than 5%    
Policyholder Account Balance [Line Items]    
Minimum credit rating (as a percent) 5.00% 5.00%
Policyholder account balance $ 194 $ 204
Life Insurance | At Guaranteed Minimum    
Policyholder Account Balance [Line Items]    
Policyholder account balance 3,759 3,986
Life Insurance | At Guaranteed Minimum | Policyholder Account Balance, Guaranteed Minimum Crediting Rate, Range Less Than 1%    
Policyholder Account Balance [Line Items]    
Policyholder account balance 0 0
Life Insurance | At Guaranteed Minimum | Policyholder Account Balance, Guaranteed Minimum Crediting Rate, Range From 1% To 2%    
Policyholder Account Balance [Line Items]    
Policyholder account balance 0 0
Life Insurance | At Guaranteed Minimum | Policyholder Account Balance, Guaranteed Minimum Crediting Rate, Range From 2% To 3%    
Policyholder Account Balance [Line Items]    
Policyholder account balance 10 11
Life Insurance | At Guaranteed Minimum | Policyholder Account Balance, Guaranteed Minimum Crediting Rate, Range From 3% To 4%    
Policyholder Account Balance [Line Items]    
Policyholder account balance 1,051 1,140
Life Insurance | At Guaranteed Minimum | Policyholder Account Balance, Guaranteed Minimum Crediting Rate, Range From 4% To 5%    
Policyholder Account Balance [Line Items]    
Policyholder account balance 2,504 2,631
Life Insurance | At Guaranteed Minimum | Policyholder Account Balance, Guaranteed Minimum Crediting Rate, Greater than 5%    
Policyholder Account Balance [Line Items]    
Policyholder account balance 194 204
Life Insurance | 1 Basis Point - 50 Basis Points Above    
Policyholder Account Balance [Line Items]    
Policyholder account balance 708 695
Life Insurance | 1 Basis Point - 50 Basis Points Above | Policyholder Account Balance, Guaranteed Minimum Crediting Rate, Range Less Than 1%    
Policyholder Account Balance [Line Items]    
Policyholder account balance 0 0
Life Insurance | 1 Basis Point - 50 Basis Points Above | Policyholder Account Balance, Guaranteed Minimum Crediting Rate, Range From 1% To 2%    
Policyholder Account Balance [Line Items]    
Policyholder account balance 114 112
Life Insurance | 1 Basis Point - 50 Basis Points Above | Policyholder Account Balance, Guaranteed Minimum Crediting Rate, Range From 2% To 3%    
Policyholder Account Balance [Line Items]    
Policyholder account balance 156 170
Life Insurance | 1 Basis Point - 50 Basis Points Above | Policyholder Account Balance, Guaranteed Minimum Crediting Rate, Range From 3% To 4%    
Policyholder Account Balance [Line Items]    
Policyholder account balance 438 413
Life Insurance | 1 Basis Point - 50 Basis Points Above | Policyholder Account Balance, Guaranteed Minimum Crediting Rate, Range From 4% To 5%    
Policyholder Account Balance [Line Items]    
Policyholder account balance 0 0
Life Insurance | 1 Basis Point - 50 Basis Points Above | Policyholder Account Balance, Guaranteed Minimum Crediting Rate, Greater than 5%    
Policyholder Account Balance [Line Items]    
Policyholder account balance 0 0
Life Insurance | More than 50 Basis Points Above Minimum Guarantee    
Policyholder Account Balance [Line Items]    
Policyholder account balance 2,058 2,093
Life Insurance | More than 50 Basis Points Above Minimum Guarantee | Policyholder Account Balance, Guaranteed Minimum Crediting Rate, Range Less Than 1%    
Policyholder Account Balance [Line Items]    
Policyholder account balance 0 0
Life Insurance | More than 50 Basis Points Above Minimum Guarantee | Policyholder Account Balance, Guaranteed Minimum Crediting Rate, Range From 1% To 2%    
Policyholder Account Balance [Line Items]    
Policyholder account balance 354 361
Life Insurance | More than 50 Basis Points Above Minimum Guarantee | Policyholder Account Balance, Guaranteed Minimum Crediting Rate, Range From 2% To 3%    
Policyholder Account Balance [Line Items]    
Policyholder account balance 1,667 1,707
Life Insurance | More than 50 Basis Points Above Minimum Guarantee | Policyholder Account Balance, Guaranteed Minimum Crediting Rate, Range From 3% To 4%    
Policyholder Account Balance [Line Items]    
Policyholder account balance 37 25
Life Insurance | More than 50 Basis Points Above Minimum Guarantee | Policyholder Account Balance, Guaranteed Minimum Crediting Rate, Range From 4% To 5%    
Policyholder Account Balance [Line Items]    
Policyholder account balance 0 0
Life Insurance | More than 50 Basis Points Above Minimum Guarantee | Policyholder Account Balance, Guaranteed Minimum Crediting Rate, Greater than 5%    
Policyholder Account Balance [Line Items]    
Policyholder account balance 0 0
Corporate & Other    
Policyholder Account Balance [Line Items]    
Policyholder account balance $ 5,597 $ 6,101
Corporate & Other | Policyholder Account Balance, Guaranteed Minimum Crediting Rate, Range Less Than 1%    
Policyholder Account Balance [Line Items]    
Minimum credit rating (as a percent) 1.00% 1.00%
Policyholder account balance $ 2,361 $ 2,751
Corporate & Other | Policyholder Account Balance, Guaranteed Minimum Crediting Rate, Range From 1% To 2%    
Policyholder Account Balance [Line Items]    
Policyholder account balance $ 652 $ 758
Corporate & Other | Policyholder Account Balance, Guaranteed Minimum Crediting Rate, Range From 1% To 2% | Minimum    
Policyholder Account Balance [Line Items]    
Minimum credit rating (as a percent) 1.00% 1.00%
Corporate & Other | Policyholder Account Balance, Guaranteed Minimum Crediting Rate, Range From 1% To 2% | Maximum    
Policyholder Account Balance [Line Items]    
Minimum credit rating (as a percent) 2.00% 2.00%
Corporate & Other | Policyholder Account Balance, Guaranteed Minimum Crediting Rate, Range From 2% To 3%    
Policyholder Account Balance [Line Items]    
Policyholder account balance $ 1,471 $ 1,402
Corporate & Other | Policyholder Account Balance, Guaranteed Minimum Crediting Rate, Range From 2% To 3% | Minimum    
Policyholder Account Balance [Line Items]    
Minimum credit rating (as a percent) 2.00% 2.00%
Corporate & Other | Policyholder Account Balance, Guaranteed Minimum Crediting Rate, Range From 2% To 3% | Maximum    
Policyholder Account Balance [Line Items]    
Minimum credit rating (as a percent) 3.00% 3.00%
Corporate & Other | Policyholder Account Balance, Guaranteed Minimum Crediting Rate, Range From 3% To 4%    
Policyholder Account Balance [Line Items]    
Policyholder account balance $ 920 $ 988
Corporate & Other | Policyholder Account Balance, Guaranteed Minimum Crediting Rate, Range From 3% To 4% | Minimum    
Policyholder Account Balance [Line Items]    
Minimum credit rating (as a percent) 3.00% 3.00%
Corporate & Other | Policyholder Account Balance, Guaranteed Minimum Crediting Rate, Range From 3% To 4% | Maximum    
Policyholder Account Balance [Line Items]    
Minimum credit rating (as a percent) 4.00% 4.00%
Corporate & Other | Policyholder Account Balance, Guaranteed Minimum Crediting Rate, Range From 4% To 5%    
Policyholder Account Balance [Line Items]    
Policyholder account balance $ 184 $ 193
Corporate & Other | Policyholder Account Balance, Guaranteed Minimum Crediting Rate, Range From 4% To 5% | Minimum    
Policyholder Account Balance [Line Items]    
Minimum credit rating (as a percent) 4.00% 4.00%
Corporate & Other | Policyholder Account Balance, Guaranteed Minimum Crediting Rate, Range From 4% To 5% | Maximum    
Policyholder Account Balance [Line Items]    
Minimum credit rating (as a percent) 5.00% 5.00%
Corporate & Other | Policyholder Account Balance, Guaranteed Minimum Crediting Rate, Greater than 5%    
Policyholder Account Balance [Line Items]    
Minimum credit rating (as a percent) 5.00% 5.00%
Policyholder account balance $ 9 $ 9
Corporate & Other | At Guaranteed Minimum    
Policyholder Account Balance [Line Items]    
Policyholder account balance 4,953 5,434
Corporate & Other | At Guaranteed Minimum | Policyholder Account Balance, Guaranteed Minimum Crediting Rate, Range Less Than 1%    
Policyholder Account Balance [Line Items]    
Policyholder account balance 2,360 2,750
Corporate & Other | At Guaranteed Minimum | Policyholder Account Balance, Guaranteed Minimum Crediting Rate, Range From 1% To 2%    
Policyholder Account Balance [Line Items]    
Policyholder account balance 615 718
Corporate & Other | At Guaranteed Minimum | Policyholder Account Balance, Guaranteed Minimum Crediting Rate, Range From 2% To 3%    
Policyholder Account Balance [Line Items]    
Policyholder account balance 1,413 1,306
Corporate & Other | At Guaranteed Minimum | Policyholder Account Balance, Guaranteed Minimum Crediting Rate, Range From 3% To 4%    
Policyholder Account Balance [Line Items]    
Policyholder account balance 375 461
Corporate & Other | At Guaranteed Minimum | Policyholder Account Balance, Guaranteed Minimum Crediting Rate, Range From 4% To 5%    
Policyholder Account Balance [Line Items]    
Policyholder account balance 181 190
Corporate & Other | At Guaranteed Minimum | Policyholder Account Balance, Guaranteed Minimum Crediting Rate, Greater than 5%    
Policyholder Account Balance [Line Items]    
Policyholder account balance 9 9
Corporate & Other | 1 Basis Point - 50 Basis Points Above    
Policyholder Account Balance [Line Items]    
Policyholder account balance 53 34
Corporate & Other | 1 Basis Point - 50 Basis Points Above | Policyholder Account Balance, Guaranteed Minimum Crediting Rate, Range Less Than 1%    
Policyholder Account Balance [Line Items]    
Policyholder account balance 0 0
Corporate & Other | 1 Basis Point - 50 Basis Points Above | Policyholder Account Balance, Guaranteed Minimum Crediting Rate, Range From 1% To 2%    
Policyholder Account Balance [Line Items]    
Policyholder account balance 1 1
Corporate & Other | 1 Basis Point - 50 Basis Points Above | Policyholder Account Balance, Guaranteed Minimum Crediting Rate, Range From 2% To 3%    
Policyholder Account Balance [Line Items]    
Policyholder account balance 2 32
Corporate & Other | 1 Basis Point - 50 Basis Points Above | Policyholder Account Balance, Guaranteed Minimum Crediting Rate, Range From 3% To 4%    
Policyholder Account Balance [Line Items]    
Policyholder account balance 50 1
Corporate & Other | 1 Basis Point - 50 Basis Points Above | Policyholder Account Balance, Guaranteed Minimum Crediting Rate, Range From 4% To 5%    
Policyholder Account Balance [Line Items]    
Policyholder account balance 0 0
Corporate & Other | 1 Basis Point - 50 Basis Points Above | Policyholder Account Balance, Guaranteed Minimum Crediting Rate, Greater than 5%    
Policyholder Account Balance [Line Items]    
Policyholder account balance 0 0
Corporate & Other | More than 50 Basis Points Above Minimum Guarantee    
Policyholder Account Balance [Line Items]    
Policyholder account balance 591 633
Corporate & Other | More than 50 Basis Points Above Minimum Guarantee | Policyholder Account Balance, Guaranteed Minimum Crediting Rate, Range Less Than 1%    
Policyholder Account Balance [Line Items]    
Policyholder account balance 1 1
Corporate & Other | More than 50 Basis Points Above Minimum Guarantee | Policyholder Account Balance, Guaranteed Minimum Crediting Rate, Range From 1% To 2%    
Policyholder Account Balance [Line Items]    
Policyholder account balance 36 39
Corporate & Other | More than 50 Basis Points Above Minimum Guarantee | Policyholder Account Balance, Guaranteed Minimum Crediting Rate, Range From 2% To 3%    
Policyholder Account Balance [Line Items]    
Policyholder account balance 56 64
Corporate & Other | More than 50 Basis Points Above Minimum Guarantee | Policyholder Account Balance, Guaranteed Minimum Crediting Rate, Range From 3% To 4%    
Policyholder Account Balance [Line Items]    
Policyholder account balance 495 526
Corporate & Other | More than 50 Basis Points Above Minimum Guarantee | Policyholder Account Balance, Guaranteed Minimum Crediting Rate, Range From 4% To 5%    
Policyholder Account Balance [Line Items]    
Policyholder account balance 3 3
Corporate & Other | More than 50 Basis Points Above Minimum Guarantee | Policyholder Account Balance, Guaranteed Minimum Crediting Rate, Greater than 5%    
Policyholder Account Balance [Line Items]    
Policyholder account balance $ 0 $ 0