v3.26.1
Policyholder Account Balances - Summary of Policyholder Account Balances by Ranges (Details) - USD ($)
$ in Millions
Jun. 30, 2026
Dec. 31, 2025
Jun. 30, 2025
Dec. 31, 2024
Policyholder Account Balance [Line Items]        
Policyholder account balances $ 139,510 $ 136,245    
Variable Annuities        
Policyholder Account Balance [Line Items]        
Policyholder account balances 42,568 40,060 $ 37,026 $ 35,267
Variable Annuities | At Guaranteed Minimum        
Policyholder Account Balance [Line Items]        
Policyholder account balances 1,509   1,664  
Variable Annuities | 1-50 Basis Points Above        
Policyholder Account Balance [Line Items]        
Policyholder account balances 0   0  
Variable Annuities | 51-100 Basis Points Above        
Policyholder Account Balance [Line Items]        
Policyholder account balances 0   0  
Variable Annuities | 101-150 Basis Points Above        
Policyholder Account Balance [Line Items]        
Policyholder account balances 0   0  
Variable Annuities | Greater Than 150 Basis Points Above        
Policyholder Account Balance [Line Items]        
Policyholder account balances $ 4   $ 7  
Variable Annuities | Up to 1.00%        
Policyholder Account Balance [Line Items]        
Range of guaranteed minimum crediting rate 1.00%   1.00%  
Policyholder account balances $ 0   $ 0  
Variable Annuities | Up to 1.00% | At Guaranteed Minimum        
Policyholder Account Balance [Line Items]        
Policyholder account balances 0   0  
Variable Annuities | Up to 1.00% | 1-50 Basis Points Above        
Policyholder Account Balance [Line Items]        
Policyholder account balances 0   0  
Variable Annuities | Up to 1.00% | 51-100 Basis Points Above        
Policyholder Account Balance [Line Items]        
Policyholder account balances 0   0  
Variable Annuities | Up to 1.00% | 101-150 Basis Points Above        
Policyholder Account Balance [Line Items]        
Policyholder account balances 0   0  
Variable Annuities | Up to 1.00% | Greater Than 150 Basis Points Above        
Policyholder Account Balance [Line Items]        
Policyholder account balances 0   0  
Variable Annuities | 1.01% - 2.00%        
Policyholder Account Balance [Line Items]        
Policyholder account balances 9   10  
Variable Annuities | 1.01% - 2.00% | At Guaranteed Minimum        
Policyholder Account Balance [Line Items]        
Policyholder account balances 5   3  
Variable Annuities | 1.01% - 2.00% | 1-50 Basis Points Above        
Policyholder Account Balance [Line Items]        
Policyholder account balances 0   0  
Variable Annuities | 1.01% - 2.00% | 51-100 Basis Points Above        
Policyholder Account Balance [Line Items]        
Policyholder account balances 0   0  
Variable Annuities | 1.01% - 2.00% | 101-150 Basis Points Above        
Policyholder Account Balance [Line Items]        
Policyholder account balances 0   0  
Variable Annuities | 1.01% - 2.00% | Greater Than 150 Basis Points Above        
Policyholder Account Balance [Line Items]        
Policyholder account balances 4   7  
Variable Annuities | 2.01% - 3.00%        
Policyholder Account Balance [Line Items]        
Policyholder account balances 433   486  
Variable Annuities | 2.01% - 3.00% | At Guaranteed Minimum        
Policyholder Account Balance [Line Items]        
Policyholder account balances 433   486  
Variable Annuities | 2.01% - 3.00% | 1-50 Basis Points Above        
Policyholder Account Balance [Line Items]        
Policyholder account balances 0   0  
Variable Annuities | 2.01% - 3.00% | 51-100 Basis Points Above        
Policyholder Account Balance [Line Items]        
Policyholder account balances 0   0  
Variable Annuities | 2.01% - 3.00% | 101-150 Basis Points Above        
Policyholder Account Balance [Line Items]        
Policyholder account balances 0   0  
Variable Annuities | 2.01% - 3.00% | Greater Than 150 Basis Points Above        
Policyholder Account Balance [Line Items]        
Policyholder account balances 0   0  
Variable Annuities | 3.01% - 4.00%        
Policyholder Account Balance [Line Items]        
Policyholder account balances 1,067   1,168  
Variable Annuities | 3.01% - 4.00% | At Guaranteed Minimum        
Policyholder Account Balance [Line Items]        
Policyholder account balances 1,067   1,168  
Variable Annuities | 3.01% - 4.00% | 1-50 Basis Points Above        
Policyholder Account Balance [Line Items]        
Policyholder account balances 0   0  
Variable Annuities | 3.01% - 4.00% | 51-100 Basis Points Above        
Policyholder Account Balance [Line Items]        
Policyholder account balances 0   0  
Variable Annuities | 3.01% - 4.00% | 101-150 Basis Points Above        
Policyholder Account Balance [Line Items]        
Policyholder account balances 0   0  
Variable Annuities | 3.01% - 4.00% | Greater Than 150 Basis Points Above        
Policyholder Account Balance [Line Items]        
Policyholder account balances $ 0   $ 0  
Variable Annuities | 4.01% and above        
Policyholder Account Balance [Line Items]        
Range of guaranteed minimum crediting rate 4.01%   4.01%  
Policyholder account balances $ 4   $ 7  
Variable Annuities | 4.01% and above | At Guaranteed Minimum        
Policyholder Account Balance [Line Items]        
Policyholder account balances 4   7  
Variable Annuities | 4.01% and above | 1-50 Basis Points Above        
Policyholder Account Balance [Line Items]        
Policyholder account balances 0   0  
Variable Annuities | 4.01% and above | 51-100 Basis Points Above        
Policyholder Account Balance [Line Items]        
Policyholder account balances 0   0  
Variable Annuities | 4.01% and above | 101-150 Basis Points Above        
Policyholder Account Balance [Line Items]        
Policyholder account balances 0   0  
Variable Annuities | 4.01% and above | Greater Than 150 Basis Points Above        
Policyholder Account Balance [Line Items]        
Policyholder account balances 0   0  
Variable Annuities | Other        
Policyholder Account Balance [Line Items]        
Policyholder account balances 41,055   35,355  
Variable Annuities | Other | At Guaranteed Minimum        
Policyholder Account Balance [Line Items]        
Policyholder account balances 0   0  
Variable Annuities | Other | 1-50 Basis Points Above        
Policyholder Account Balance [Line Items]        
Policyholder account balances 0   0  
Variable Annuities | Other | 51-100 Basis Points Above        
Policyholder Account Balance [Line Items]        
Policyholder account balances 0   0  
Variable Annuities | Other | 101-150 Basis Points Above        
Policyholder Account Balance [Line Items]        
Policyholder account balances 0   0  
Variable Annuities | Other | Greater Than 150 Basis Points Above        
Policyholder Account Balance [Line Items]        
Policyholder account balances $ 0   $ 0  
Variable Annuities | Minimum | 1.01% - 2.00%        
Policyholder Account Balance [Line Items]        
Range of guaranteed minimum crediting rate 1.01%   1.01%  
Variable Annuities | Minimum | 2.01% - 3.00%        
Policyholder Account Balance [Line Items]        
Range of guaranteed minimum crediting rate 2.01%   2.01%  
Variable Annuities | Minimum | 3.01% - 4.00%        
Policyholder Account Balance [Line Items]        
Range of guaranteed minimum crediting rate 3.01%   3.01%  
Variable Annuities | Maximum | 1.01% - 2.00%        
Policyholder Account Balance [Line Items]        
Range of guaranteed minimum crediting rate 2.00%   2.00%  
Variable Annuities | Maximum | 2.01% - 3.00%        
Policyholder Account Balance [Line Items]        
Range of guaranteed minimum crediting rate 3.00%   3.00%  
Variable Annuities | Maximum | 3.01% - 4.00%        
Policyholder Account Balance [Line Items]        
Range of guaranteed minimum crediting rate 4.00%   4.00%  
Fixed Annuities        
Policyholder Account Balance [Line Items]        
Policyholder account balances $ 29,418 28,728 $ 26,832 25,963
Fixed Annuities | At Guaranteed Minimum        
Policyholder Account Balance [Line Items]        
Policyholder account balances 2,453   2,812  
Fixed Annuities | 1-50 Basis Points Above        
Policyholder Account Balance [Line Items]        
Policyholder account balances 937   1,128  
Fixed Annuities | 51-100 Basis Points Above        
Policyholder Account Balance [Line Items]        
Policyholder account balances 475   562  
Fixed Annuities | 101-150 Basis Points Above        
Policyholder Account Balance [Line Items]        
Policyholder account balances 166   318  
Fixed Annuities | Greater Than 150 Basis Points Above        
Policyholder Account Balance [Line Items]        
Policyholder account balances $ 10,838   $ 8,941  
Fixed Annuities | Up to 1.00%        
Policyholder Account Balance [Line Items]        
Range of guaranteed minimum crediting rate 1.00%   1.00%  
Policyholder account balances $ 3,424   $ 3,875  
Fixed Annuities | Up to 1.00% | At Guaranteed Minimum        
Policyholder Account Balance [Line Items]        
Policyholder account balances 125   108  
Fixed Annuities | Up to 1.00% | 1-50 Basis Points Above        
Policyholder Account Balance [Line Items]        
Policyholder account balances 635   895  
Fixed Annuities | Up to 1.00% | 51-100 Basis Points Above        
Policyholder Account Balance [Line Items]        
Policyholder account balances 396   425  
Fixed Annuities | Up to 1.00% | 101-150 Basis Points Above        
Policyholder Account Balance [Line Items]        
Policyholder account balances 122   197  
Fixed Annuities | Up to 1.00% | Greater Than 150 Basis Points Above        
Policyholder Account Balance [Line Items]        
Policyholder account balances 2,146   2,250  
Fixed Annuities | 1.01% - 2.00%        
Policyholder Account Balance [Line Items]        
Policyholder account balances 9,142   7,322  
Fixed Annuities | 1.01% - 2.00% | At Guaranteed Minimum        
Policyholder Account Balance [Line Items]        
Policyholder account balances 153   215  
Fixed Annuities | 1.01% - 2.00% | 1-50 Basis Points Above        
Policyholder Account Balance [Line Items]        
Policyholder account balances 241   206  
Fixed Annuities | 1.01% - 2.00% | 51-100 Basis Points Above        
Policyholder Account Balance [Line Items]        
Policyholder account balances 78   136  
Fixed Annuities | 1.01% - 2.00% | 101-150 Basis Points Above        
Policyholder Account Balance [Line Items]        
Policyholder account balances 42   119  
Fixed Annuities | 1.01% - 2.00% | Greater Than 150 Basis Points Above        
Policyholder Account Balance [Line Items]        
Policyholder account balances 8,628   6,646  
Fixed Annuities | 2.01% - 3.00%        
Policyholder Account Balance [Line Items]        
Policyholder account balances 1,379   1,530  
Fixed Annuities | 2.01% - 3.00% | At Guaranteed Minimum        
Policyholder Account Balance [Line Items]        
Policyholder account balances 1,251   1,455  
Fixed Annuities | 2.01% - 3.00% | 1-50 Basis Points Above        
Policyholder Account Balance [Line Items]        
Policyholder account balances 61   27  
Fixed Annuities | 2.01% - 3.00% | 51-100 Basis Points Above        
Policyholder Account Balance [Line Items]        
Policyholder account balances 1   1  
Fixed Annuities | 2.01% - 3.00% | 101-150 Basis Points Above        
Policyholder Account Balance [Line Items]        
Policyholder account balances 2   2  
Fixed Annuities | 2.01% - 3.00% | Greater Than 150 Basis Points Above        
Policyholder Account Balance [Line Items]        
Policyholder account balances 64   45  
Fixed Annuities | 3.01% - 4.00%        
Policyholder Account Balance [Line Items]        
Policyholder account balances 772   873  
Fixed Annuities | 3.01% - 4.00% | At Guaranteed Minimum        
Policyholder Account Balance [Line Items]        
Policyholder account balances 772   873  
Fixed Annuities | 3.01% - 4.00% | 1-50 Basis Points Above        
Policyholder Account Balance [Line Items]        
Policyholder account balances 0   0  
Fixed Annuities | 3.01% - 4.00% | 51-100 Basis Points Above        
Policyholder Account Balance [Line Items]        
Policyholder account balances 0   0  
Fixed Annuities | 3.01% - 4.00% | 101-150 Basis Points Above        
Policyholder Account Balance [Line Items]        
Policyholder account balances 0   0  
Fixed Annuities | 3.01% - 4.00% | Greater Than 150 Basis Points Above        
Policyholder Account Balance [Line Items]        
Policyholder account balances $ 0   $ 0  
Fixed Annuities | 4.01% and above        
Policyholder Account Balance [Line Items]        
Range of guaranteed minimum crediting rate 4.01%   4.01%  
Policyholder account balances $ 152   $ 161  
Fixed Annuities | 4.01% and above | At Guaranteed Minimum        
Policyholder Account Balance [Line Items]        
Policyholder account balances 152   161  
Fixed Annuities | 4.01% and above | 1-50 Basis Points Above        
Policyholder Account Balance [Line Items]        
Policyholder account balances 0   0  
Fixed Annuities | 4.01% and above | 51-100 Basis Points Above        
Policyholder Account Balance [Line Items]        
Policyholder account balances 0   0  
Fixed Annuities | 4.01% and above | 101-150 Basis Points Above        
Policyholder Account Balance [Line Items]        
Policyholder account balances 0   0  
Fixed Annuities | 4.01% and above | Greater Than 150 Basis Points Above        
Policyholder Account Balance [Line Items]        
Policyholder account balances 0   0  
Fixed Annuities | Other        
Policyholder Account Balance [Line Items]        
Policyholder account balances 14,549   13,071  
Fixed Annuities | Other | At Guaranteed Minimum        
Policyholder Account Balance [Line Items]        
Policyholder account balances 0   0  
Fixed Annuities | Other | 1-50 Basis Points Above        
Policyholder Account Balance [Line Items]        
Policyholder account balances 0   0  
Fixed Annuities | Other | 51-100 Basis Points Above        
Policyholder Account Balance [Line Items]        
Policyholder account balances 0   0  
Fixed Annuities | Other | 101-150 Basis Points Above        
Policyholder Account Balance [Line Items]        
Policyholder account balances 0   0  
Fixed Annuities | Other | Greater Than 150 Basis Points Above        
Policyholder Account Balance [Line Items]        
Policyholder account balances $ 0   $ 0  
Fixed Annuities | Minimum | 1.01% - 2.00%        
Policyholder Account Balance [Line Items]        
Range of guaranteed minimum crediting rate 1.01%   1.01%  
Fixed Annuities | Minimum | 2.01% - 3.00%        
Policyholder Account Balance [Line Items]        
Range of guaranteed minimum crediting rate 2.01%   2.01%  
Fixed Annuities | Minimum | 3.01% - 4.00%        
Policyholder Account Balance [Line Items]        
Range of guaranteed minimum crediting rate 3.01%   3.01%  
Fixed Annuities | Maximum | 1.01% - 2.00%        
Policyholder Account Balance [Line Items]        
Range of guaranteed minimum crediting rate 2.00%   2.00%  
Fixed Annuities | Maximum | 2.01% - 3.00%        
Policyholder Account Balance [Line Items]        
Range of guaranteed minimum crediting rate 3.00%   3.00%  
Fixed Annuities | Maximum | 3.01% - 4.00%        
Policyholder Account Balance [Line Items]        
Range of guaranteed minimum crediting rate 4.00%   4.00%  
UL and Other        
Policyholder Account Balance [Line Items]        
Policyholder account balances $ 35,690 35,986 $ 36,116 36,599
UL and Other | At Guaranteed Minimum        
Policyholder Account Balance [Line Items]        
Policyholder account balances 24,480   25,470  
UL and Other | 1-50 Basis Points Above        
Policyholder Account Balance [Line Items]        
Policyholder account balances 18   8  
UL and Other | 51-100 Basis Points Above        
Policyholder Account Balance [Line Items]        
Policyholder account balances 404   377  
UL and Other | 101-150 Basis Points Above        
Policyholder Account Balance [Line Items]        
Policyholder account balances 32   74  
UL and Other | Greater Than 150 Basis Points Above        
Policyholder Account Balance [Line Items]        
Policyholder account balances $ 3,214   $ 3,401  
UL and Other | Up to 1.00%        
Policyholder Account Balance [Line Items]        
Range of guaranteed minimum crediting rate 1.00%   1.00%  
Policyholder account balances $ 1,179   $ 1,066  
UL and Other | Up to 1.00% | At Guaranteed Minimum        
Policyholder Account Balance [Line Items]        
Policyholder account balances 271   256  
UL and Other | Up to 1.00% | 1-50 Basis Points Above        
Policyholder Account Balance [Line Items]        
Policyholder account balances 0   0  
UL and Other | Up to 1.00% | 51-100 Basis Points Above        
Policyholder Account Balance [Line Items]        
Policyholder account balances 246   226  
UL and Other | Up to 1.00% | 101-150 Basis Points Above        
Policyholder Account Balance [Line Items]        
Policyholder account balances 32   74  
UL and Other | Up to 1.00% | Greater Than 150 Basis Points Above        
Policyholder Account Balance [Line Items]        
Policyholder account balances 630   510  
UL and Other | 1.01% - 2.00%        
Policyholder Account Balance [Line Items]        
Policyholder account balances 3,091   3,432  
UL and Other | 1.01% - 2.00% | At Guaranteed Minimum        
Policyholder Account Balance [Line Items]        
Policyholder account balances 507   535  
UL and Other | 1.01% - 2.00% | 1-50 Basis Points Above        
Policyholder Account Balance [Line Items]        
Policyholder account balances 0   0  
UL and Other | 1.01% - 2.00% | 51-100 Basis Points Above        
Policyholder Account Balance [Line Items]        
Policyholder account balances 0   6  
UL and Other | 1.01% - 2.00% | 101-150 Basis Points Above        
Policyholder Account Balance [Line Items]        
Policyholder account balances 0   0  
UL and Other | 1.01% - 2.00% | Greater Than 150 Basis Points Above        
Policyholder Account Balance [Line Items]        
Policyholder account balances 2,584   2,891  
UL and Other | 2.01% - 3.00%        
Policyholder Account Balance [Line Items]        
Policyholder account balances 6,217   6,744  
UL and Other | 2.01% - 3.00% | At Guaranteed Minimum        
Policyholder Account Balance [Line Items]        
Policyholder account balances 6,042   6,592  
UL and Other | 2.01% - 3.00% | 1-50 Basis Points Above        
Policyholder Account Balance [Line Items]        
Policyholder account balances 18   8  
UL and Other | 2.01% - 3.00% | 51-100 Basis Points Above        
Policyholder Account Balance [Line Items]        
Policyholder account balances 157   144  
UL and Other | 2.01% - 3.00% | 101-150 Basis Points Above        
Policyholder Account Balance [Line Items]        
Policyholder account balances 0   0  
UL and Other | 2.01% - 3.00% | Greater Than 150 Basis Points Above        
Policyholder Account Balance [Line Items]        
Policyholder account balances 0   0  
UL and Other | 3.01% - 4.00%        
Policyholder Account Balance [Line Items]        
Policyholder account balances 14,292   14,611  
UL and Other | 3.01% - 4.00% | At Guaranteed Minimum        
Policyholder Account Balance [Line Items]        
Policyholder account balances 14,291   14,610  
UL and Other | 3.01% - 4.00% | 1-50 Basis Points Above        
Policyholder Account Balance [Line Items]        
Policyholder account balances 0   0  
UL and Other | 3.01% - 4.00% | 51-100 Basis Points Above        
Policyholder Account Balance [Line Items]        
Policyholder account balances 1   1  
UL and Other | 3.01% - 4.00% | 101-150 Basis Points Above        
Policyholder Account Balance [Line Items]        
Policyholder account balances 0   0  
UL and Other | 3.01% - 4.00% | Greater Than 150 Basis Points Above        
Policyholder Account Balance [Line Items]        
Policyholder account balances $ 0   $ 0  
UL and Other | 4.01% and above        
Policyholder Account Balance [Line Items]        
Range of guaranteed minimum crediting rate 4.01%   4.01%  
Policyholder account balances $ 3,369   $ 3,477  
UL and Other | 4.01% and above | At Guaranteed Minimum        
Policyholder Account Balance [Line Items]        
Policyholder account balances 3,369   3,477  
UL and Other | 4.01% and above | 1-50 Basis Points Above        
Policyholder Account Balance [Line Items]        
Policyholder account balances 0   0  
UL and Other | 4.01% and above | 51-100 Basis Points Above        
Policyholder Account Balance [Line Items]        
Policyholder account balances 0   0  
UL and Other | 4.01% and above | 101-150 Basis Points Above        
Policyholder Account Balance [Line Items]        
Policyholder account balances 0   0  
UL and Other | 4.01% and above | Greater Than 150 Basis Points Above        
Policyholder Account Balance [Line Items]        
Policyholder account balances 0   0  
UL and Other | Other        
Policyholder Account Balance [Line Items]        
Policyholder account balances 7,542   6,786  
UL and Other | Other | At Guaranteed Minimum        
Policyholder Account Balance [Line Items]        
Policyholder account balances 0   0  
UL and Other | Other | 1-50 Basis Points Above        
Policyholder Account Balance [Line Items]        
Policyholder account balances 0   0  
UL and Other | Other | 51-100 Basis Points Above        
Policyholder Account Balance [Line Items]        
Policyholder account balances 0   0  
UL and Other | Other | 101-150 Basis Points Above        
Policyholder Account Balance [Line Items]        
Policyholder account balances 0   0  
UL and Other | Other | Greater Than 150 Basis Points Above        
Policyholder Account Balance [Line Items]        
Policyholder account balances $ 0   $ 0  
UL and Other | Minimum | 1.01% - 2.00%        
Policyholder Account Balance [Line Items]        
Range of guaranteed minimum crediting rate 1.01%   1.01%  
UL and Other | Minimum | 2.01% - 3.00%        
Policyholder Account Balance [Line Items]        
Range of guaranteed minimum crediting rate 2.01%   2.01%  
UL and Other | Minimum | 3.01% - 4.00%        
Policyholder Account Balance [Line Items]        
Range of guaranteed minimum crediting rate 3.01%   3.01%  
UL and Other | Maximum | 1.01% - 2.00%        
Policyholder Account Balance [Line Items]        
Range of guaranteed minimum crediting rate 2.00%   2.00%  
UL and Other | Maximum | 2.01% - 3.00%        
Policyholder Account Balance [Line Items]        
Range of guaranteed minimum crediting rate 3.00%   3.00%  
UL and Other | Maximum | 3.01% - 4.00%        
Policyholder Account Balance [Line Items]        
Range of guaranteed minimum crediting rate 4.00%   4.00%  
Retirement Plan Services        
Policyholder Account Balance [Line Items]        
Policyholder account balances $ 23,419 $ 23,843 $ 23,700 $ 23,619
Retirement Plan Services | At Guaranteed Minimum        
Policyholder Account Balance [Line Items]        
Policyholder account balances 7,910   8,398  
Retirement Plan Services | 1-50 Basis Points Above        
Policyholder Account Balance [Line Items]        
Policyholder account balances 1,966   1,907  
Retirement Plan Services | 51-100 Basis Points Above        
Policyholder Account Balance [Line Items]        
Policyholder account balances 2,349   2,552  
Retirement Plan Services | 101-150 Basis Points Above        
Policyholder Account Balance [Line Items]        
Policyholder account balances 4,334   3,785  
Retirement Plan Services | Greater Than 150 Basis Points Above        
Policyholder Account Balance [Line Items]        
Policyholder account balances $ 6,860   $ 7,058  
Retirement Plan Services | Up to 1.00%        
Policyholder Account Balance [Line Items]        
Range of guaranteed minimum crediting rate 1.00%   1.00%  
Policyholder account balances $ 12,414   $ 11,256  
Retirement Plan Services | Up to 1.00% | At Guaranteed Minimum        
Policyholder Account Balance [Line Items]        
Policyholder account balances 650   573  
Retirement Plan Services | Up to 1.00% | 1-50 Basis Points Above        
Policyholder Account Balance [Line Items]        
Policyholder account balances 612   329  
Retirement Plan Services | Up to 1.00% | 51-100 Basis Points Above        
Policyholder Account Balance [Line Items]        
Policyholder account balances 625   693  
Retirement Plan Services | Up to 1.00% | 101-150 Basis Points Above        
Policyholder Account Balance [Line Items]        
Policyholder account balances 4,169   3,265  
Retirement Plan Services | Up to 1.00% | Greater Than 150 Basis Points Above        
Policyholder Account Balance [Line Items]        
Policyholder account balances 6,358   6,396  
Retirement Plan Services | 1.01% - 2.00%        
Policyholder Account Balance [Line Items]        
Policyholder account balances 3,729   4,436  
Retirement Plan Services | 1.01% - 2.00% | At Guaranteed Minimum        
Policyholder Account Balance [Line Items]        
Policyholder account balances 517   472  
Retirement Plan Services | 1.01% - 2.00% | 1-50 Basis Points Above        
Policyholder Account Balance [Line Items]        
Policyholder account balances 1,275   944  
Retirement Plan Services | 1.01% - 2.00% | 51-100 Basis Points Above        
Policyholder Account Balance [Line Items]        
Policyholder account balances 1,278   1,851  
Retirement Plan Services | 1.01% - 2.00% | 101-150 Basis Points Above        
Policyholder Account Balance [Line Items]        
Policyholder account balances 157   507  
Retirement Plan Services | 1.01% - 2.00% | Greater Than 150 Basis Points Above        
Policyholder Account Balance [Line Items]        
Policyholder account balances 502   662  
Retirement Plan Services | 2.01% - 3.00%        
Policyholder Account Balance [Line Items]        
Policyholder account balances 2,051   2,254  
Retirement Plan Services | 2.01% - 3.00% | At Guaranteed Minimum        
Policyholder Account Balance [Line Items]        
Policyholder account balances 1,584   1,719  
Retirement Plan Services | 2.01% - 3.00% | 1-50 Basis Points Above        
Policyholder Account Balance [Line Items]        
Policyholder account balances 25   532  
Retirement Plan Services | 2.01% - 3.00% | 51-100 Basis Points Above        
Policyholder Account Balance [Line Items]        
Policyholder account balances 439   1  
Retirement Plan Services | 2.01% - 3.00% | 101-150 Basis Points Above        
Policyholder Account Balance [Line Items]        
Policyholder account balances 3   2  
Retirement Plan Services | 2.01% - 3.00% | Greater Than 150 Basis Points Above        
Policyholder Account Balance [Line Items]        
Policyholder account balances 0   0  
Retirement Plan Services | 3.01% - 4.00%        
Policyholder Account Balance [Line Items]        
Policyholder account balances 3,751   4,199  
Retirement Plan Services | 3.01% - 4.00% | At Guaranteed Minimum        
Policyholder Account Balance [Line Items]        
Policyholder account balances 3,685   4,079  
Retirement Plan Services | 3.01% - 4.00% | 1-50 Basis Points Above        
Policyholder Account Balance [Line Items]        
Policyholder account balances 54   102  
Retirement Plan Services | 3.01% - 4.00% | 51-100 Basis Points Above        
Policyholder Account Balance [Line Items]        
Policyholder account balances 7   7  
Retirement Plan Services | 3.01% - 4.00% | 101-150 Basis Points Above        
Policyholder Account Balance [Line Items]        
Policyholder account balances 5   11  
Retirement Plan Services | 3.01% - 4.00% | Greater Than 150 Basis Points Above        
Policyholder Account Balance [Line Items]        
Policyholder account balances $ 0   $ 0  
Retirement Plan Services | 4.01% and above        
Policyholder Account Balance [Line Items]        
Range of guaranteed minimum crediting rate 4.01%   4.01%  
Policyholder account balances $ 1,474   $ 1,555  
Retirement Plan Services | 4.01% and above | At Guaranteed Minimum        
Policyholder Account Balance [Line Items]        
Policyholder account balances 1,474   1,555  
Retirement Plan Services | 4.01% and above | 1-50 Basis Points Above        
Policyholder Account Balance [Line Items]        
Policyholder account balances 0   0  
Retirement Plan Services | 4.01% and above | 51-100 Basis Points Above        
Policyholder Account Balance [Line Items]        
Policyholder account balances 0   0  
Retirement Plan Services | 4.01% and above | 101-150 Basis Points Above        
Policyholder Account Balance [Line Items]        
Policyholder account balances 0   0  
Retirement Plan Services | 4.01% and above | Greater Than 150 Basis Points Above        
Policyholder Account Balance [Line Items]        
Policyholder account balances $ 0   $ 0  
Retirement Plan Services | Minimum | 1.01% - 2.00%        
Policyholder Account Balance [Line Items]        
Range of guaranteed minimum crediting rate 1.01%   1.01%  
Retirement Plan Services | Minimum | 2.01% - 3.00%        
Policyholder Account Balance [Line Items]        
Range of guaranteed minimum crediting rate 2.01%   2.01%  
Retirement Plan Services | Minimum | 3.01% - 4.00%        
Policyholder Account Balance [Line Items]        
Range of guaranteed minimum crediting rate 3.01%   3.01%  
Retirement Plan Services | Maximum | 1.01% - 2.00%        
Policyholder Account Balance [Line Items]        
Range of guaranteed minimum crediting rate 2.00%   2.00%  
Retirement Plan Services | Maximum | 2.01% - 3.00%        
Policyholder Account Balance [Line Items]        
Range of guaranteed minimum crediting rate 3.00%   3.00%  
Retirement Plan Services | Maximum | 3.01% - 4.00%        
Policyholder Account Balance [Line Items]        
Range of guaranteed minimum crediting rate 4.00%   4.00%