v3.26.1
Policyholder Contract Deposits and Other Policyholder Funds - Account balances by guaranteed minimum interest rates (Details) - USD ($)
$ in Millions
Mar. 31, 2026
Mar. 31, 2025
Policyholder Account Balance [Line Items]    
Policyholder account balance $ 105,662 $ 105,004
Policyholder account balance, percentage 100.00% 100.00%
At Guaranteed Minimum    
Policyholder Account Balance [Line Items]    
Policyholder account balance $ 45,476 $ 49,543
Policyholder account balance, percentage 43.00% 47.00%
1 Basis Point - 50 Basis Points Above    
Policyholder Account Balance [Line Items]    
Policyholder account balance $ 4,422 $ 4,489
Policyholder account balance, percentage 4.00% 4.00%
More than 50 Basis Points Above Minimum Guarantee    
Policyholder Account Balance [Line Items]    
Policyholder account balance $ 55,764 $ 50,972
Policyholder account balance, percentage 53.00% 49.00%
Individual Retirement    
Policyholder Account Balance [Line Items]    
Policyholder account balance $ 59,543 $ 56,949
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 $ 41,565 $ 38,484
Individual Retirement | Policyholder Account Balance, Guaranteed Minimum Crediting Rate, Range From 1% To 2%    
Policyholder Account Balance [Line Items]    
Policyholder account balance $ 2,642 $ 3,314
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 $ 10,004 $ 9,193
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 $ 4,921 $ 5,517
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 $ 380 $ 407
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, Range From 5% To 5.5%    
Policyholder Account Balance [Line Items]    
Minimum credit rating (as a percent) 5.00% 5.00%
Policyholder account balance $ 31 $ 34
Individual Retirement | At Guaranteed Minimum    
Policyholder Account Balance [Line Items]    
Policyholder account balance 15,400 17,207
Individual Retirement | At Guaranteed Minimum | Policyholder Account Balance, Guaranteed Minimum Crediting Rate, Range Less Than 1%    
Policyholder Account Balance [Line Items]    
Policyholder account balance 2,601 2,923
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 1,869 2,226
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 5,638 6,145
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 4,886 5,479
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 376 403
Individual Retirement | At Guaranteed Minimum | Policyholder Account Balance, Guaranteed Minimum Crediting Rate, Range From 5% To 5.5%    
Policyholder Account Balance [Line Items]    
Policyholder account balance 30 31
Individual Retirement | 1 Basis Point - 50 Basis Points Above    
Policyholder Account Balance [Line Items]    
Policyholder account balance 1,479 1,374
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 1,256 1,161
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 47 41
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 145 138
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 34
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, Range From 5% To 5.5%    
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 42,664 38,368
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 37,708 34,400
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 726 1,047
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 4,221 2,910
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, Range From 5% To 5.5%    
Policyholder Account Balance [Line Items]    
Policyholder account balance 1 3
Group Retirement    
Policyholder Account Balance [Line Items]    
Policyholder account balance $ 33,648 $ 34,813
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 $ 12,831 $ 12,397
Group Retirement | Policyholder Account Balance, Guaranteed Minimum Crediting Rate, Range From 1% To 2%    
Policyholder Account Balance [Line Items]    
Policyholder account balance $ 4,235 $ 4,601
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 $ 10,063 $ 10,905
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 $ 503 $ 541
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 $ 5,896 $ 6,239
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, Range From 5% To 5.5%    
Policyholder Account Balance [Line Items]    
Minimum credit rating (as a percent) 5.00% 5.00%
Policyholder account balance $ 120 $ 130
Group Retirement | At Guaranteed Minimum    
Policyholder Account Balance [Line Items]    
Policyholder account balance 21,018 22,575
Group Retirement | At Guaranteed Minimum | Policyholder Account Balance, Guaranteed Minimum Crediting Rate, Range Less Than 1%    
Policyholder Account Balance [Line Items]    
Policyholder account balance 1,891 2,000
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 2,952 3,239
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 9,656 10,426
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 503 541
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 5,896 6,239
Group Retirement | At Guaranteed Minimum | Policyholder Account Balance, Guaranteed Minimum Crediting Rate, Range From 5% To 5.5%    
Policyholder Account Balance [Line Items]    
Policyholder account balance 120 130
Group Retirement | 1 Basis Point - 50 Basis Points Above    
Policyholder Account Balance [Line Items]    
Policyholder account balance 2,208 2,401
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 1,533 1,516
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 432 534
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 243 351
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, Range From 5% To 5.5%    
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 10,422 9,837
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 9,407 8,881
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 851 828
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 164 128
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, Range From 5% To 5.5%    
Policyholder Account Balance [Line Items]    
Policyholder account balance 0 0
Life Insurance    
Policyholder Account Balance [Line Items]    
Policyholder account balance $ 6,641 $ 6,905
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 $ 472 $ 475
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 $ 1,855 $ 1,912
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 $ 1,549 $ 1,615
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 $ 2,567 $ 2,696
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, Range From 5% To 5.5%    
Policyholder Account Balance [Line Items]    
Minimum credit rating (as a percent) 5.00% 5.00%
Policyholder account balance $ 198 $ 207
Life Insurance | At Guaranteed Minimum    
Policyholder Account Balance [Line Items]    
Policyholder account balance 3,846 4,086
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 12
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 1,071 1,171
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 2,567 2,696
Life Insurance | At Guaranteed Minimum | Policyholder Account Balance, Guaranteed Minimum Crediting Rate, Range From 5% To 5.5%    
Policyholder Account Balance [Line Items]    
Policyholder account balance 198 207
Life Insurance | 1 Basis Point - 50 Basis Points Above    
Policyholder Account Balance [Line Items]    
Policyholder account balance 727 708
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 113 111
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 163 177
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 451 420
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, Range From 5% To 5.5%    
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 2,068 2,111
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 359 364
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 1,682 1,723
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 27 24
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, Range From 5% To 5.5%    
Policyholder Account Balance [Line Items]    
Policyholder account balance 0 0
Corporate & Other    
Policyholder Account Balance [Line Items]    
Policyholder account balance $ 5,830 $ 6,337
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 $ 2,559 $ 2,946
Corporate & Other | Policyholder Account Balance, Guaranteed Minimum Crediting Rate, Range From 1% To 2%    
Policyholder Account Balance [Line Items]    
Policyholder account balance $ 702 $ 805
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 $ 1,420 $ 1,363
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 $ 952 $ 1,019
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 $ 188 $ 195
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, Range From 5% To 5.5%    
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 5,212 5,675
Corporate & Other | At Guaranteed Minimum | Policyholder Account Balance, Guaranteed Minimum Crediting Rate, Range Less Than 1%    
Policyholder Account Balance [Line Items]    
Policyholder account balance 2,558 2,943
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 666 763
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 1,354 1,293
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 440 475
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 185 192
Corporate & Other | At Guaranteed Minimum | Policyholder Account Balance, Guaranteed Minimum Crediting Rate, Range From 5% To 5.5%    
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 8 6
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 1
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 2
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 6 2
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 1 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, Range From 5% To 5.5%    
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 610 656
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 2
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 35 40
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 60 68
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 511 543
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, Range From 5% To 5.5%    
Policyholder Account Balance [Line Items]    
Policyholder account balance $ 0 $ 0