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Policyholder Account Balances, Future Policy Benefits and Claims - Account Balances by Guaranteed Minimum Interest Rates (Details)
$ in Millions
Sep. 30, 2023
USD ($)
Dec. 31, 2022
USD ($)
Dec. 31, 2021
USD ($)
Policyholder Account Balance [Line Items]      
Policyholder account balances $ 26,712 $ 24,986 $ 23,723
Percentage of total account values that reset in:      
Next 12 months 99.90% 99.60%  
Greater than 12 months to 24 months 0.10% 0.30%  
Greater than 24 months 0.00% 0.10%  
Total 100.00% 100.00%  
At Guaranteed Minimum      
Percentage of total account values that reset in:      
Next 12 months 99.90% 99.80%  
Greater than 12 months to 24 months 0.00% 0.10%  
Greater than 24 months 0.10% 0.10%  
Total 100.00% 100.00%  
1-49 bps above Guaranteed Minimum      
Percentage of total account values that reset in:      
Next 12 months 99.10% 96.30%  
Greater than 12 months to 24 months 0.90% 3.00%  
Greater than 24 months 0.00% 0.70%  
Total 100.00% 100.00%  
1-49 bps above Guaranteed Minimum | Minimum      
Policyholder Account Balance [Line Items]      
Policyholder account balance above guaranteed minimum crediting rate 0.0001 0.0001  
1-49 bps above Guaranteed Minimum | Maximum      
Policyholder Account Balance [Line Items]      
Policyholder account balance above guaranteed minimum crediting rate 0.0049 0.0049  
50-99 bps above Guaranteed Minimum      
Percentage of total account values that reset in:      
Next 12 months 99.30% 93.80%  
Greater than 12 months to 24 months 0.60% 5.80%  
Greater than 24 months 0.10% 0.40%  
Total 100.00% 100.00%  
50-99 bps above Guaranteed Minimum | Minimum      
Policyholder Account Balance [Line Items]      
Policyholder account balance above guaranteed minimum crediting rate 0.0050 0.0050  
50-99 bps above Guaranteed Minimum | Maximum      
Policyholder Account Balance [Line Items]      
Policyholder account balance above guaranteed minimum crediting rate 0.0099 0.0099  
100-150 bps above Guaranteed Minimum      
Percentage of total account values that reset in:      
Next 12 months 100.00% 100.00%  
Greater than 12 months to 24 months 0.00% 0.00%  
Greater than 24 months 0.00% 0.00%  
Total 100.00% 100.00%  
100-150 bps above Guaranteed Minimum | Minimum      
Policyholder Account Balance [Line Items]      
Policyholder account balance above guaranteed minimum crediting rate 0.0100 0.0100  
100-150 bps above Guaranteed Minimum | Maximum      
Policyholder Account Balance [Line Items]      
Policyholder account balance above guaranteed minimum crediting rate 0.0150 0.0150  
Greater than 150 bps above Guaranteed Minimum      
Percentage of total account values that reset in:      
Next 12 months 100.00% 100.00%  
Greater than 12 months to 24 months 0.00% 0.00%  
Greater than 24 months 0.00% 0.00%  
Total 100.00% 100.00%  
Greater than 150 bps above Guaranteed Minimum | Minimum      
Policyholder Account Balance [Line Items]      
Policyholder account balance above guaranteed minimum crediting rate 0.0150 0.0150  
Total      
Policyholder Account Balance [Line Items]      
Policyholder account balances $ 13,269 $ 14,344  
Total | At Guaranteed Minimum      
Policyholder Account Balance [Line Items]      
Policyholder account balances 12,250 13,582  
Total | 1-49 bps above Guaranteed Minimum      
Policyholder Account Balance [Line Items]      
Policyholder account balances 644 519  
Total | 50-99 bps above Guaranteed Minimum      
Policyholder Account Balance [Line Items]      
Policyholder account balances 284 170  
Total | 100-150 bps above Guaranteed Minimum      
Policyholder Account Balance [Line Items]      
Policyholder account balances 51 52  
Total | Greater than 150 bps above Guaranteed Minimum      
Policyholder Account Balance [Line Items]      
Policyholder account balances 40 21  
Fixed accounts of variable annuities      
Policyholder Account Balance [Line Items]      
Policyholder account balances 4,301 4,689  
Fixed accounts of variable annuities | At Guaranteed Minimum      
Policyholder Account Balance [Line Items]      
Policyholder account balances 4,112 4,568  
Fixed accounts of variable annuities | 1-49 bps above Guaranteed Minimum      
Policyholder Account Balance [Line Items]      
Policyholder account balances 149 102  
Fixed accounts of variable annuities | 50-99 bps above Guaranteed Minimum      
Policyholder Account Balance [Line Items]      
Policyholder account balances 32 18  
Fixed accounts of variable annuities | 100-150 bps above Guaranteed Minimum      
Policyholder Account Balance [Line Items]      
Policyholder account balances 7 1  
Fixed accounts of variable annuities | Greater than 150 bps above Guaranteed Minimum      
Policyholder Account Balance [Line Items]      
Policyholder account balances 1 0  
Fixed accounts of structured variable annuities      
Policyholder Account Balance [Line Items]      
Policyholder account balances 32 23  
Fixed accounts of structured variable annuities | At Guaranteed Minimum      
Policyholder Account Balance [Line Items]      
Policyholder account balances 9 12  
Fixed accounts of structured variable annuities | 1-49 bps above Guaranteed Minimum      
Policyholder Account Balance [Line Items]      
Policyholder account balances 19 7  
Fixed accounts of structured variable annuities | 50-99 bps above Guaranteed Minimum      
Policyholder Account Balance [Line Items]      
Policyholder account balances 3 3  
Fixed accounts of structured variable annuities | 100-150 bps above Guaranteed Minimum      
Policyholder Account Balance [Line Items]      
Policyholder account balances 1 1  
Fixed accounts of structured variable annuities | Greater than 150 bps above Guaranteed Minimum      
Policyholder Account Balance [Line Items]      
Policyholder account balances 0 0  
Fixed annuities      
Policyholder Account Balance [Line Items]      
Policyholder account balances 6,168 6,781  
Fixed annuities | At Guaranteed Minimum      
Policyholder Account Balance [Line Items]      
Policyholder account balances 5,459 6,204  
Fixed annuities | 1-49 bps above Guaranteed Minimum      
Policyholder Account Balance [Line Items]      
Policyholder account balances 459 402  
Fixed annuities | 50-99 bps above Guaranteed Minimum      
Policyholder Account Balance [Line Items]      
Policyholder account balances 221 132  
Fixed annuities | 100-150 bps above Guaranteed Minimum      
Policyholder Account Balance [Line Items]      
Policyholder account balances 21 33  
Fixed annuities | Greater than 150 bps above Guaranteed Minimum      
Policyholder Account Balance [Line Items]      
Policyholder account balances 8 10  
Non-indexed accounts of fixed indexed annuities      
Policyholder Account Balance [Line Items]      
Policyholder account balances 23 25  
Non-indexed accounts of fixed indexed annuities | At Guaranteed Minimum      
Policyholder Account Balance [Line Items]      
Policyholder account balances 0 1  
Non-indexed accounts of fixed indexed annuities | 1-49 bps above Guaranteed Minimum      
Policyholder Account Balance [Line Items]      
Policyholder account balances 3 3  
Non-indexed accounts of fixed indexed annuities | 50-99 bps above Guaranteed Minimum      
Policyholder Account Balance [Line Items]      
Policyholder account balances 7 7  
Non-indexed accounts of fixed indexed annuities | 100-150 bps above Guaranteed Minimum      
Policyholder Account Balance [Line Items]      
Policyholder account balances 13 14  
Non-indexed accounts of fixed indexed annuities | Greater than 150 bps above Guaranteed Minimum      
Policyholder Account Balance [Line Items]      
Policyholder account balances 0 0  
Universal life insurance      
Policyholder Account Balance [Line Items]      
Policyholder account balances 1,461 1,513  
Universal life insurance | At Guaranteed Minimum      
Policyholder Account Balance [Line Items]      
Policyholder account balances 1,445 1,509  
Universal life insurance | 1-49 bps above Guaranteed Minimum      
Policyholder Account Balance [Line Items]      
Policyholder account balances 2 1  
Universal life insurance | 50-99 bps above Guaranteed Minimum      
Policyholder Account Balance [Line Items]      
Policyholder account balances 11 3  
Universal life insurance | 100-150 bps above Guaranteed Minimum      
Policyholder Account Balance [Line Items]      
Policyholder account balances 3 0  
Universal life insurance | Greater than 150 bps above Guaranteed Minimum      
Policyholder Account Balance [Line Items]      
Policyholder account balances 0 0  
Fixed accounts of variable universal life insurance      
Policyholder Account Balance [Line Items]      
Policyholder account balances 822 838  
Fixed accounts of variable universal life insurance | At Guaranteed Minimum      
Policyholder Account Balance [Line Items]      
Policyholder account balances 765 816  
Fixed accounts of variable universal life insurance | 1-49 bps above Guaranteed Minimum      
Policyholder Account Balance [Line Items]      
Policyholder account balances 12 4  
Fixed accounts of variable universal life insurance | 50-99 bps above Guaranteed Minimum      
Policyholder Account Balance [Line Items]      
Policyholder account balances 8 4  
Fixed accounts of variable universal life insurance | 100-150 bps above Guaranteed Minimum      
Policyholder Account Balance [Line Items]      
Policyholder account balances 6 3  
Fixed accounts of variable universal life insurance | Greater than 150 bps above Guaranteed Minimum      
Policyholder Account Balance [Line Items]      
Policyholder account balances 31 11  
Non-indexed accounts of indexed universal life insurance      
Policyholder Account Balance [Line Items]      
Policyholder account balances 130 129  
Non-indexed accounts of indexed universal life insurance | At Guaranteed Minimum      
Policyholder Account Balance [Line Items]      
Policyholder account balances 128 126  
Non-indexed accounts of indexed universal life insurance | 1-49 bps above Guaranteed Minimum      
Policyholder Account Balance [Line Items]      
Policyholder account balances 0 0  
Non-indexed accounts of indexed universal life insurance | 50-99 bps above Guaranteed Minimum      
Policyholder Account Balance [Line Items]      
Policyholder account balances 2 3  
Non-indexed accounts of indexed universal life insurance | 100-150 bps above Guaranteed Minimum      
Policyholder Account Balance [Line Items]      
Policyholder account balances 0 0  
Non-indexed accounts of indexed universal life insurance | Greater than 150 bps above Guaranteed Minimum      
Policyholder Account Balance [Line Items]      
Policyholder account balances 0 0  
Other life insurance      
Policyholder Account Balance [Line Items]      
Policyholder account balances 332 346  
Other life insurance | At Guaranteed Minimum      
Policyholder Account Balance [Line Items]      
Policyholder account balances 332 346  
Other life insurance | 1-49 bps above Guaranteed Minimum      
Policyholder Account Balance [Line Items]      
Policyholder account balances 0 0  
Other life insurance | 50-99 bps above Guaranteed Minimum      
Policyholder Account Balance [Line Items]      
Policyholder account balances 0 0  
Other life insurance | 100-150 bps above Guaranteed Minimum      
Policyholder Account Balance [Line Items]      
Policyholder account balances 0 0  
Other life insurance | Greater than 150 bps above Guaranteed Minimum      
Policyholder Account Balance [Line Items]      
Policyholder account balances 0 0  
1% - 1.99% | Total      
Policyholder Account Balance [Line Items]      
Policyholder account balances $ 1,157 $ 1,395  
1% - 1.99% | Total | Minimum      
Policyholder Account Balance [Line Items]      
Range of Guaranteed Minimum Crediting Rates 1.00% 1.00%  
1% - 1.99% | Total | Maximum      
Policyholder Account Balance [Line Items]      
Range of Guaranteed Minimum Crediting Rates 1.99% 1.99%  
1% - 1.99% | Total | At Guaranteed Minimum      
Policyholder Account Balance [Line Items]      
Policyholder account balances $ 183 $ 646  
1% - 1.99% | Total | 1-49 bps above Guaranteed Minimum      
Policyholder Account Balance [Line Items]      
Policyholder account balances 629 517  
1% - 1.99% | Total | 50-99 bps above Guaranteed Minimum      
Policyholder Account Balance [Line Items]      
Policyholder account balances 269 165  
1% - 1.99% | Total | 100-150 bps above Guaranteed Minimum      
Policyholder Account Balance [Line Items]      
Policyholder account balances 41 48  
1% - 1.99% | Total | Greater than 150 bps above Guaranteed Minimum      
Policyholder Account Balance [Line Items]      
Policyholder account balances 35 19  
1% - 1.99% | Fixed accounts of variable annuities      
Policyholder Account Balance [Line Items]      
Policyholder account balances $ 254 $ 289  
1% - 1.99% | Fixed accounts of variable annuities | Minimum      
Policyholder Account Balance [Line Items]      
Range of Guaranteed Minimum Crediting Rates 1.00% 1.00%  
1% - 1.99% | Fixed accounts of variable annuities | Maximum      
Policyholder Account Balance [Line Items]      
Range of Guaranteed Minimum Crediting Rates 1.99% 1.99%  
1% - 1.99% | Fixed accounts of variable annuities | At Guaranteed Minimum      
Policyholder Account Balance [Line Items]      
Policyholder account balances $ 66 $ 169  
1% - 1.99% | Fixed accounts of variable annuities | 1-49 bps above Guaranteed Minimum      
Policyholder Account Balance [Line Items]      
Policyholder account balances 149 102  
1% - 1.99% | Fixed accounts of variable annuities | 50-99 bps above Guaranteed Minimum      
Policyholder Account Balance [Line Items]      
Policyholder account balances 32 18  
1% - 1.99% | Fixed accounts of variable annuities | 100-150 bps above Guaranteed Minimum      
Policyholder Account Balance [Line Items]      
Policyholder account balances 6 0  
1% - 1.99% | Fixed accounts of variable annuities | Greater than 150 bps above Guaranteed Minimum      
Policyholder Account Balance [Line Items]      
Policyholder account balances 1 0  
1% - 1.99% | Fixed accounts of structured variable annuities      
Policyholder Account Balance [Line Items]      
Policyholder account balances $ 24 $ 23  
1% - 1.99% | Fixed accounts of structured variable annuities | Minimum      
Policyholder Account Balance [Line Items]      
Range of Guaranteed Minimum Crediting Rates 1.00% 1.00%  
1% - 1.99% | Fixed accounts of structured variable annuities | Maximum      
Policyholder Account Balance [Line Items]      
Range of Guaranteed Minimum Crediting Rates 1.99% 1.99%  
1% - 1.99% | Fixed accounts of structured variable annuities | At Guaranteed Minimum      
Policyholder Account Balance [Line Items]      
Policyholder account balances $ 1 $ 12  
1% - 1.99% | Fixed accounts of structured variable annuities | 1-49 bps above Guaranteed Minimum      
Policyholder Account Balance [Line Items]      
Policyholder account balances 19 7  
1% - 1.99% | Fixed accounts of structured variable annuities | 50-99 bps above Guaranteed Minimum      
Policyholder Account Balance [Line Items]      
Policyholder account balances 3 3  
1% - 1.99% | Fixed accounts of structured variable annuities | 100-150 bps above Guaranteed Minimum      
Policyholder Account Balance [Line Items]      
Policyholder account balances 1 1  
1% - 1.99% | Fixed accounts of structured variable annuities | Greater than 150 bps above Guaranteed Minimum      
Policyholder Account Balance [Line Items]      
Policyholder account balances 0 0  
1% - 1.99% | Fixed annuities      
Policyholder Account Balance [Line Items]      
Policyholder account balances $ 821 $ 1,037  
1% - 1.99% | Fixed annuities | Minimum      
Policyholder Account Balance [Line Items]      
Range of Guaranteed Minimum Crediting Rates 1.00% 1.00%  
1% - 1.99% | Fixed annuities | Maximum      
Policyholder Account Balance [Line Items]      
Range of Guaranteed Minimum Crediting Rates 1.99% 1.99%  
1% - 1.99% | Fixed annuities | At Guaranteed Minimum      
Policyholder Account Balance [Line Items]      
Policyholder account balances $ 116 $ 460  
1% - 1.99% | Fixed annuities | 1-49 bps above Guaranteed Minimum      
Policyholder Account Balance [Line Items]      
Policyholder account balances 455 402  
1% - 1.99% | Fixed annuities | 50-99 bps above Guaranteed Minimum      
Policyholder Account Balance [Line Items]      
Policyholder account balances 221 132  
1% - 1.99% | Fixed annuities | 100-150 bps above Guaranteed Minimum      
Policyholder Account Balance [Line Items]      
Policyholder account balances 21 33  
1% - 1.99% | Fixed annuities | Greater than 150 bps above Guaranteed Minimum      
Policyholder Account Balance [Line Items]      
Policyholder account balances 8 10  
1% - 1.99% | Non-indexed accounts of fixed indexed annuities      
Policyholder Account Balance [Line Items]      
Policyholder account balances $ 23 $ 25  
1% - 1.99% | Non-indexed accounts of fixed indexed annuities | Minimum      
Policyholder Account Balance [Line Items]      
Range of Guaranteed Minimum Crediting Rates 1.00% 1.00%  
1% - 1.99% | Non-indexed accounts of fixed indexed annuities | Maximum      
Policyholder Account Balance [Line Items]      
Range of Guaranteed Minimum Crediting Rates 1.99% 1.99%  
1% - 1.99% | Non-indexed accounts of fixed indexed annuities | At Guaranteed Minimum      
Policyholder Account Balance [Line Items]      
Policyholder account balances $ 0 $ 1  
1% - 1.99% | Non-indexed accounts of fixed indexed annuities | 1-49 bps above Guaranteed Minimum      
Policyholder Account Balance [Line Items]      
Policyholder account balances 3 3  
1% - 1.99% | Non-indexed accounts of fixed indexed annuities | 50-99 bps above Guaranteed Minimum      
Policyholder Account Balance [Line Items]      
Policyholder account balances 7 7  
1% - 1.99% | Non-indexed accounts of fixed indexed annuities | 100-150 bps above Guaranteed Minimum      
Policyholder Account Balance [Line Items]      
Policyholder account balances 13 14  
1% - 1.99% | Non-indexed accounts of fixed indexed annuities | Greater than 150 bps above Guaranteed Minimum      
Policyholder Account Balance [Line Items]      
Policyholder account balances 0 0  
1% - 1.99% | Universal life insurance      
Policyholder Account Balance [Line Items]      
Policyholder account balances $ 0 $ 0  
1% - 1.99% | Universal life insurance | Minimum      
Policyholder Account Balance [Line Items]      
Range of Guaranteed Minimum Crediting Rates 1.00% 1.00%  
1% - 1.99% | Universal life insurance | Maximum      
Policyholder Account Balance [Line Items]      
Range of Guaranteed Minimum Crediting Rates 1.99% 1.99%  
1% - 1.99% | Universal life insurance | At Guaranteed Minimum      
Policyholder Account Balance [Line Items]      
Policyholder account balances $ 0 $ 0  
1% - 1.99% | Universal life insurance | 1-49 bps above Guaranteed Minimum      
Policyholder Account Balance [Line Items]      
Policyholder account balances 0 0  
1% - 1.99% | Universal life insurance | 50-99 bps above Guaranteed Minimum      
Policyholder Account Balance [Line Items]      
Policyholder account balances 0 0  
1% - 1.99% | Universal life insurance | 100-150 bps above Guaranteed Minimum      
Policyholder Account Balance [Line Items]      
Policyholder account balances 0 0  
1% - 1.99% | Universal life insurance | Greater than 150 bps above Guaranteed Minimum      
Policyholder Account Balance [Line Items]      
Policyholder account balances 0 0  
1% - 1.99% | Fixed accounts of variable universal life insurance      
Policyholder Account Balance [Line Items]      
Policyholder account balances $ 33 $ 18  
1% - 1.99% | Fixed accounts of variable universal life insurance | Minimum      
Policyholder Account Balance [Line Items]      
Range of Guaranteed Minimum Crediting Rates 1.00% 1.00%  
1% - 1.99% | Fixed accounts of variable universal life insurance | Maximum      
Policyholder Account Balance [Line Items]      
Range of Guaranteed Minimum Crediting Rates 1.99% 1.99%  
1% - 1.99% | Fixed accounts of variable universal life insurance | At Guaranteed Minimum      
Policyholder Account Balance [Line Items]      
Policyholder account balances $ 0 $ 4  
1% - 1.99% | Fixed accounts of variable universal life insurance | 1-49 bps above Guaranteed Minimum      
Policyholder Account Balance [Line Items]      
Policyholder account balances 3 3  
1% - 1.99% | Fixed accounts of variable universal life insurance | 50-99 bps above Guaranteed Minimum      
Policyholder Account Balance [Line Items]      
Policyholder account balances 4 2  
1% - 1.99% | Fixed accounts of variable universal life insurance | 100-150 bps above Guaranteed Minimum      
Policyholder Account Balance [Line Items]      
Policyholder account balances 0 0  
1% - 1.99% | Fixed accounts of variable universal life insurance | Greater than 150 bps above Guaranteed Minimum      
Policyholder Account Balance [Line Items]      
Policyholder account balances 26 9  
1% - 1.99% | Non-indexed accounts of indexed universal life insurance      
Policyholder Account Balance [Line Items]      
Policyholder account balances $ 2 $ 3  
1% - 1.99% | Non-indexed accounts of indexed universal life insurance | Minimum      
Policyholder Account Balance [Line Items]      
Range of Guaranteed Minimum Crediting Rates 1.00% 1.00%  
1% - 1.99% | Non-indexed accounts of indexed universal life insurance | Maximum      
Policyholder Account Balance [Line Items]      
Range of Guaranteed Minimum Crediting Rates 1.99% 1.99%  
1% - 1.99% | Non-indexed accounts of indexed universal life insurance | At Guaranteed Minimum      
Policyholder Account Balance [Line Items]      
Policyholder account balances $ 0 $ 0  
1% - 1.99% | Non-indexed accounts of indexed universal life insurance | 1-49 bps above Guaranteed Minimum      
Policyholder Account Balance [Line Items]      
Policyholder account balances 0 0  
1% - 1.99% | Non-indexed accounts of indexed universal life insurance | 50-99 bps above Guaranteed Minimum      
Policyholder Account Balance [Line Items]      
Policyholder account balances 2 3  
1% - 1.99% | Non-indexed accounts of indexed universal life insurance | 100-150 bps above Guaranteed Minimum      
Policyholder Account Balance [Line Items]      
Policyholder account balances 0 0  
1% - 1.99% | Non-indexed accounts of indexed universal life insurance | Greater than 150 bps above Guaranteed Minimum      
Policyholder Account Balance [Line Items]      
Policyholder account balances 0 0  
1% - 1.99% | Other life insurance      
Policyholder Account Balance [Line Items]      
Policyholder account balances $ 0 $ 0  
1% - 1.99% | Other life insurance | Minimum      
Policyholder Account Balance [Line Items]      
Range of Guaranteed Minimum Crediting Rates 1.00% 1.00%  
1% - 1.99% | Other life insurance | Maximum      
Policyholder Account Balance [Line Items]      
Range of Guaranteed Minimum Crediting Rates 1.99% 1.99%  
1% - 1.99% | Other life insurance | At Guaranteed Minimum      
Policyholder Account Balance [Line Items]      
Policyholder account balances $ 0 $ 0  
1% - 1.99% | Other life insurance | 1-49 bps above Guaranteed Minimum      
Policyholder Account Balance [Line Items]      
Policyholder account balances 0 0  
1% - 1.99% | Other life insurance | 50-99 bps above Guaranteed Minimum      
Policyholder Account Balance [Line Items]      
Policyholder account balances 0 0  
1% - 1.99% | Other life insurance | 100-150 bps above Guaranteed Minimum      
Policyholder Account Balance [Line Items]      
Policyholder account balances 0 0  
1% - 1.99% | Other life insurance | Greater than 150 bps above Guaranteed Minimum      
Policyholder Account Balance [Line Items]      
Policyholder account balances 0 0  
2% - 2.99% | Total      
Policyholder Account Balance [Line Items]      
Policyholder account balances $ 432 $ 461  
2% - 2.99% | Total | Minimum      
Policyholder Account Balance [Line Items]      
Range of Guaranteed Minimum Crediting Rates 2.00% 2.00%  
2% - 2.99% | Total | Maximum      
Policyholder Account Balance [Line Items]      
Range of Guaranteed Minimum Crediting Rates 2.99% 2.99%  
2% - 2.99% | Total | At Guaranteed Minimum      
Policyholder Account Balance [Line Items]      
Policyholder account balances $ 405 $ 455  
2% - 2.99% | Total | 1-49 bps above Guaranteed Minimum      
Policyholder Account Balance [Line Items]      
Policyholder account balances 13 0  
2% - 2.99% | Total | 50-99 bps above Guaranteed Minimum      
Policyholder Account Balance [Line Items]      
Policyholder account balances 7 2  
2% - 2.99% | Total | 100-150 bps above Guaranteed Minimum      
Policyholder Account Balance [Line Items]      
Policyholder account balances 2 2  
2% - 2.99% | Total | Greater than 150 bps above Guaranteed Minimum      
Policyholder Account Balance [Line Items]      
Policyholder account balances 5 2  
2% - 2.99% | Fixed accounts of variable annuities      
Policyholder Account Balance [Line Items]      
Policyholder account balances $ 148 $ 177  
2% - 2.99% | Fixed accounts of variable annuities | Minimum      
Policyholder Account Balance [Line Items]      
Range of Guaranteed Minimum Crediting Rates 2.00% 2.00%  
2% - 2.99% | Fixed accounts of variable annuities | Maximum      
Policyholder Account Balance [Line Items]      
Range of Guaranteed Minimum Crediting Rates 2.99% 2.99%  
2% - 2.99% | Fixed accounts of variable annuities | At Guaranteed Minimum      
Policyholder Account Balance [Line Items]      
Policyholder account balances $ 148 $ 177  
2% - 2.99% | Fixed accounts of variable annuities | 1-49 bps above Guaranteed Minimum      
Policyholder Account Balance [Line Items]      
Policyholder account balances 0 0  
2% - 2.99% | Fixed accounts of variable annuities | 50-99 bps above Guaranteed Minimum      
Policyholder Account Balance [Line Items]      
Policyholder account balances 0 0  
2% - 2.99% | Fixed accounts of variable annuities | 100-150 bps above Guaranteed Minimum      
Policyholder Account Balance [Line Items]      
Policyholder account balances 0 0  
2% - 2.99% | Fixed accounts of variable annuities | Greater than 150 bps above Guaranteed Minimum      
Policyholder Account Balance [Line Items]      
Policyholder account balances 0 0  
2% - 2.99% | Fixed accounts of structured variable annuities      
Policyholder Account Balance [Line Items]      
Policyholder account balances $ 8 $ 0  
2% - 2.99% | Fixed accounts of structured variable annuities | Minimum      
Policyholder Account Balance [Line Items]      
Range of Guaranteed Minimum Crediting Rates 2.00% 2.00%  
2% - 2.99% | Fixed accounts of structured variable annuities | Maximum      
Policyholder Account Balance [Line Items]      
Range of Guaranteed Minimum Crediting Rates 2.99% 2.99%  
2% - 2.99% | Fixed accounts of structured variable annuities | At Guaranteed Minimum      
Policyholder Account Balance [Line Items]      
Policyholder account balances $ 8 $ 0  
2% - 2.99% | Fixed accounts of structured variable annuities | 1-49 bps above Guaranteed Minimum      
Policyholder Account Balance [Line Items]      
Policyholder account balances 0 0  
2% - 2.99% | Fixed accounts of structured variable annuities | 50-99 bps above Guaranteed Minimum      
Policyholder Account Balance [Line Items]      
Policyholder account balances 0 0  
2% - 2.99% | Fixed accounts of structured variable annuities | 100-150 bps above Guaranteed Minimum      
Policyholder Account Balance [Line Items]      
Policyholder account balances 0 0  
2% - 2.99% | Fixed accounts of structured variable annuities | Greater than 150 bps above Guaranteed Minimum      
Policyholder Account Balance [Line Items]      
Policyholder account balances 0 0  
2% - 2.99% | Fixed annuities      
Policyholder Account Balance [Line Items]      
Policyholder account balances $ 55 $ 67  
2% - 2.99% | Fixed annuities | Minimum      
Policyholder Account Balance [Line Items]      
Range of Guaranteed Minimum Crediting Rates 2.00% 2.00%  
2% - 2.99% | Fixed annuities | Maximum      
Policyholder Account Balance [Line Items]      
Range of Guaranteed Minimum Crediting Rates 2.99% 2.99%  
2% - 2.99% | Fixed annuities | At Guaranteed Minimum      
Policyholder Account Balance [Line Items]      
Policyholder account balances $ 51 $ 67  
2% - 2.99% | Fixed annuities | 1-49 bps above Guaranteed Minimum      
Policyholder Account Balance [Line Items]      
Policyholder account balances 4 0  
2% - 2.99% | Fixed annuities | 50-99 bps above Guaranteed Minimum      
Policyholder Account Balance [Line Items]      
Policyholder account balances 0 0  
2% - 2.99% | Fixed annuities | 100-150 bps above Guaranteed Minimum      
Policyholder Account Balance [Line Items]      
Policyholder account balances 0 0  
2% - 2.99% | Fixed annuities | Greater than 150 bps above Guaranteed Minimum      
Policyholder Account Balance [Line Items]      
Policyholder account balances 0 0  
2% - 2.99% | Non-indexed accounts of fixed indexed annuities      
Policyholder Account Balance [Line Items]      
Policyholder account balances $ 0 $ 0  
2% - 2.99% | Non-indexed accounts of fixed indexed annuities | Minimum      
Policyholder Account Balance [Line Items]      
Range of Guaranteed Minimum Crediting Rates 2.00% 2.00%  
2% - 2.99% | Non-indexed accounts of fixed indexed annuities | Maximum      
Policyholder Account Balance [Line Items]      
Range of Guaranteed Minimum Crediting Rates 2.99% 2.99%  
2% - 2.99% | Non-indexed accounts of fixed indexed annuities | At Guaranteed Minimum      
Policyholder Account Balance [Line Items]      
Policyholder account balances $ 0 $ 0  
2% - 2.99% | Non-indexed accounts of fixed indexed annuities | 1-49 bps above Guaranteed Minimum      
Policyholder Account Balance [Line Items]      
Policyholder account balances 0 0  
2% - 2.99% | Non-indexed accounts of fixed indexed annuities | 50-99 bps above Guaranteed Minimum      
Policyholder Account Balance [Line Items]      
Policyholder account balances 0 0  
2% - 2.99% | Non-indexed accounts of fixed indexed annuities | 100-150 bps above Guaranteed Minimum      
Policyholder Account Balance [Line Items]      
Policyholder account balances 0 0  
2% - 2.99% | Non-indexed accounts of fixed indexed annuities | Greater than 150 bps above Guaranteed Minimum      
Policyholder Account Balance [Line Items]      
Policyholder account balances 0 0  
2% - 2.99% | Universal life insurance      
Policyholder Account Balance [Line Items]      
Policyholder account balances $ 61 $ 56  
2% - 2.99% | Universal life insurance | Minimum      
Policyholder Account Balance [Line Items]      
Range of Guaranteed Minimum Crediting Rates 2.00% 2.00%  
2% - 2.99% | Universal life insurance | Maximum      
Policyholder Account Balance [Line Items]      
Range of Guaranteed Minimum Crediting Rates 2.99% 2.99%  
2% - 2.99% | Universal life insurance | At Guaranteed Minimum      
Policyholder Account Balance [Line Items]      
Policyholder account balances $ 53 $ 55  
2% - 2.99% | Universal life insurance | 1-49 bps above Guaranteed Minimum      
Policyholder Account Balance [Line Items]      
Policyholder account balances 1 0  
2% - 2.99% | Universal life insurance | 50-99 bps above Guaranteed Minimum      
Policyholder Account Balance [Line Items]      
Policyholder account balances 7 1  
2% - 2.99% | Universal life insurance | 100-150 bps above Guaranteed Minimum      
Policyholder Account Balance [Line Items]      
Policyholder account balances 0 0  
2% - 2.99% | Universal life insurance | Greater than 150 bps above Guaranteed Minimum      
Policyholder Account Balance [Line Items]      
Policyholder account balances 0 0  
2% - 2.99% | Fixed accounts of variable universal life insurance      
Policyholder Account Balance [Line Items]      
Policyholder account balances $ 32 $ 35  
2% - 2.99% | Fixed accounts of variable universal life insurance | Minimum      
Policyholder Account Balance [Line Items]      
Range of Guaranteed Minimum Crediting Rates 2.00% 2.00%  
2% - 2.99% | Fixed accounts of variable universal life insurance | Maximum      
Policyholder Account Balance [Line Items]      
Range of Guaranteed Minimum Crediting Rates 2.99% 2.99%  
2% - 2.99% | Fixed accounts of variable universal life insurance | At Guaranteed Minimum      
Policyholder Account Balance [Line Items]      
Policyholder account balances $ 17 $ 30  
2% - 2.99% | Fixed accounts of variable universal life insurance | 1-49 bps above Guaranteed Minimum      
Policyholder Account Balance [Line Items]      
Policyholder account balances 8 0  
2% - 2.99% | Fixed accounts of variable universal life insurance | 50-99 bps above Guaranteed Minimum      
Policyholder Account Balance [Line Items]      
Policyholder account balances 0 1  
2% - 2.99% | Fixed accounts of variable universal life insurance | 100-150 bps above Guaranteed Minimum      
Policyholder Account Balance [Line Items]      
Policyholder account balances 2 2  
2% - 2.99% | Fixed accounts of variable universal life insurance | Greater than 150 bps above Guaranteed Minimum      
Policyholder Account Balance [Line Items]      
Policyholder account balances 5 2  
2% - 2.99% | Non-indexed accounts of indexed universal life insurance      
Policyholder Account Balance [Line Items]      
Policyholder account balances $ 128 $ 126  
2% - 2.99% | Non-indexed accounts of indexed universal life insurance | Minimum      
Policyholder Account Balance [Line Items]      
Range of Guaranteed Minimum Crediting Rates 2.00% 2.00%  
2% - 2.99% | Non-indexed accounts of indexed universal life insurance | Maximum      
Policyholder Account Balance [Line Items]      
Range of Guaranteed Minimum Crediting Rates 2.99% 2.99%  
2% - 2.99% | Non-indexed accounts of indexed universal life insurance | At Guaranteed Minimum      
Policyholder Account Balance [Line Items]      
Policyholder account balances $ 128 $ 126  
2% - 2.99% | Non-indexed accounts of indexed universal life insurance | 1-49 bps above Guaranteed Minimum      
Policyholder Account Balance [Line Items]      
Policyholder account balances 0 0  
2% - 2.99% | Non-indexed accounts of indexed universal life insurance | 50-99 bps above Guaranteed Minimum      
Policyholder Account Balance [Line Items]      
Policyholder account balances 0 0  
2% - 2.99% | Non-indexed accounts of indexed universal life insurance | 100-150 bps above Guaranteed Minimum      
Policyholder Account Balance [Line Items]      
Policyholder account balances 0 0  
2% - 2.99% | Non-indexed accounts of indexed universal life insurance | Greater than 150 bps above Guaranteed Minimum      
Policyholder Account Balance [Line Items]      
Policyholder account balances 0 0  
2% - 2.99% | Other life insurance      
Policyholder Account Balance [Line Items]      
Policyholder account balances $ 0 $ 0  
2% - 2.99% | Other life insurance | Minimum      
Policyholder Account Balance [Line Items]      
Range of Guaranteed Minimum Crediting Rates 2.00% 2.00%  
2% - 2.99% | Other life insurance | Maximum      
Policyholder Account Balance [Line Items]      
Range of Guaranteed Minimum Crediting Rates 2.99% 2.99%  
2% - 2.99% | Other life insurance | At Guaranteed Minimum      
Policyholder Account Balance [Line Items]      
Policyholder account balances $ 0 $ 0  
2% - 2.99% | Other life insurance | 1-49 bps above Guaranteed Minimum      
Policyholder Account Balance [Line Items]      
Policyholder account balances 0 0  
2% - 2.99% | Other life insurance | 50-99 bps above Guaranteed Minimum      
Policyholder Account Balance [Line Items]      
Policyholder account balances 0 0  
2% - 2.99% | Other life insurance | 100-150 bps above Guaranteed Minimum      
Policyholder Account Balance [Line Items]      
Policyholder account balances 0 0  
2% - 2.99% | Other life insurance | Greater than 150 bps above Guaranteed Minimum      
Policyholder Account Balance [Line Items]      
Policyholder account balances 0 0  
3% - 3.99% | Total      
Policyholder Account Balance [Line Items]      
Policyholder account balances $ 6,329 $ 7,013  
3% - 3.99% | Total | Minimum      
Policyholder Account Balance [Line Items]      
Range of Guaranteed Minimum Crediting Rates 3.00% 3.00%  
3% - 3.99% | Total | Maximum      
Policyholder Account Balance [Line Items]      
Range of Guaranteed Minimum Crediting Rates 3.99% 3.99%  
3% - 3.99% | Total | At Guaranteed Minimum      
Policyholder Account Balance [Line Items]      
Policyholder account balances $ 6,311 $ 7,006  
3% - 3.99% | Total | 1-49 bps above Guaranteed Minimum      
Policyholder Account Balance [Line Items]      
Policyholder account balances 2 2  
3% - 3.99% | Total | 50-99 bps above Guaranteed Minimum      
Policyholder Account Balance [Line Items]      
Policyholder account balances 8 3  
3% - 3.99% | Total | 100-150 bps above Guaranteed Minimum      
Policyholder Account Balance [Line Items]      
Policyholder account balances 8 2  
3% - 3.99% | Total | Greater than 150 bps above Guaranteed Minimum      
Policyholder Account Balance [Line Items]      
Policyholder account balances 0 0  
3% - 3.99% | Fixed accounts of variable annuities      
Policyholder Account Balance [Line Items]      
Policyholder account balances $ 2,337 $ 2,612  
3% - 3.99% | Fixed accounts of variable annuities | Minimum      
Policyholder Account Balance [Line Items]      
Range of Guaranteed Minimum Crediting Rates 3.00% 3.00%  
3% - 3.99% | Fixed accounts of variable annuities | Maximum      
Policyholder Account Balance [Line Items]      
Range of Guaranteed Minimum Crediting Rates 3.99% 3.99%  
3% - 3.99% | Fixed accounts of variable annuities | At Guaranteed Minimum      
Policyholder Account Balance [Line Items]      
Policyholder account balances $ 2,336 $ 2,611  
3% - 3.99% | Fixed accounts of variable annuities | 1-49 bps above Guaranteed Minimum      
Policyholder Account Balance [Line Items]      
Policyholder account balances 0 0  
3% - 3.99% | Fixed accounts of variable annuities | 50-99 bps above Guaranteed Minimum      
Policyholder Account Balance [Line Items]      
Policyholder account balances 0 0  
3% - 3.99% | Fixed accounts of variable annuities | 100-150 bps above Guaranteed Minimum      
Policyholder Account Balance [Line Items]      
Policyholder account balances 1 1  
3% - 3.99% | Fixed accounts of variable annuities | Greater than 150 bps above Guaranteed Minimum      
Policyholder Account Balance [Line Items]      
Policyholder account balances 0 0  
3% - 3.99% | Fixed accounts of structured variable annuities      
Policyholder Account Balance [Line Items]      
Policyholder account balances $ 0 $ 0  
3% - 3.99% | Fixed accounts of structured variable annuities | Minimum      
Policyholder Account Balance [Line Items]      
Range of Guaranteed Minimum Crediting Rates 3.00% 3.00%  
3% - 3.99% | Fixed accounts of structured variable annuities | Maximum      
Policyholder Account Balance [Line Items]      
Range of Guaranteed Minimum Crediting Rates 3.99% 3.99%  
3% - 3.99% | Fixed accounts of structured variable annuities | At Guaranteed Minimum      
Policyholder Account Balance [Line Items]      
Policyholder account balances $ 0 $ 0  
3% - 3.99% | Fixed accounts of structured variable annuities | 1-49 bps above Guaranteed Minimum      
Policyholder Account Balance [Line Items]      
Policyholder account balances 0 0  
3% - 3.99% | Fixed accounts of structured variable annuities | 50-99 bps above Guaranteed Minimum      
Policyholder Account Balance [Line Items]      
Policyholder account balances 0 0  
3% - 3.99% | Fixed accounts of structured variable annuities | 100-150 bps above Guaranteed Minimum      
Policyholder Account Balance [Line Items]      
Policyholder account balances 0 0  
3% - 3.99% | Fixed accounts of structured variable annuities | Greater than 150 bps above Guaranteed Minimum      
Policyholder Account Balance [Line Items]      
Policyholder account balances 0 0  
3% - 3.99% | Fixed annuities      
Policyholder Account Balance [Line Items]      
Policyholder account balances $ 2,959 $ 3,344  
3% - 3.99% | Fixed annuities | Minimum      
Policyholder Account Balance [Line Items]      
Range of Guaranteed Minimum Crediting Rates 3.00% 3.00%  
3% - 3.99% | Fixed annuities | Maximum      
Policyholder Account Balance [Line Items]      
Range of Guaranteed Minimum Crediting Rates 3.99% 3.99%  
3% - 3.99% | Fixed annuities | At Guaranteed Minimum      
Policyholder Account Balance [Line Items]      
Policyholder account balances $ 2,959 $ 3,344  
3% - 3.99% | Fixed annuities | 1-49 bps above Guaranteed Minimum      
Policyholder Account Balance [Line Items]      
Policyholder account balances 0 0  
3% - 3.99% | Fixed annuities | 50-99 bps above Guaranteed Minimum      
Policyholder Account Balance [Line Items]      
Policyholder account balances 0 0  
3% - 3.99% | Fixed annuities | 100-150 bps above Guaranteed Minimum      
Policyholder Account Balance [Line Items]      
Policyholder account balances 0 0  
3% - 3.99% | Fixed annuities | Greater than 150 bps above Guaranteed Minimum      
Policyholder Account Balance [Line Items]      
Policyholder account balances 0 0  
3% - 3.99% | Non-indexed accounts of fixed indexed annuities      
Policyholder Account Balance [Line Items]      
Policyholder account balances $ 0 $ 0  
3% - 3.99% | Non-indexed accounts of fixed indexed annuities | Minimum      
Policyholder Account Balance [Line Items]      
Range of Guaranteed Minimum Crediting Rates 3.00% 3.00%  
3% - 3.99% | Non-indexed accounts of fixed indexed annuities | Maximum      
Policyholder Account Balance [Line Items]      
Range of Guaranteed Minimum Crediting Rates 3.99% 3.99%  
3% - 3.99% | Non-indexed accounts of fixed indexed annuities | At Guaranteed Minimum      
Policyholder Account Balance [Line Items]      
Policyholder account balances $ 0 $ 0  
3% - 3.99% | Non-indexed accounts of fixed indexed annuities | 1-49 bps above Guaranteed Minimum      
Policyholder Account Balance [Line Items]      
Policyholder account balances 0 0  
3% - 3.99% | Non-indexed accounts of fixed indexed annuities | 50-99 bps above Guaranteed Minimum      
Policyholder Account Balance [Line Items]      
Policyholder account balances 0 0  
3% - 3.99% | Non-indexed accounts of fixed indexed annuities | 100-150 bps above Guaranteed Minimum      
Policyholder Account Balance [Line Items]      
Policyholder account balances 0 0  
3% - 3.99% | Non-indexed accounts of fixed indexed annuities | Greater than 150 bps above Guaranteed Minimum      
Policyholder Account Balance [Line Items]      
Policyholder account balances 0 0  
3% - 3.99% | Universal life insurance      
Policyholder Account Balance [Line Items]      
Policyholder account balances $ 868 $ 888  
3% - 3.99% | Universal life insurance | Minimum      
Policyholder Account Balance [Line Items]      
Range of Guaranteed Minimum Crediting Rates 3.00% 3.00%  
3% - 3.99% | Universal life insurance | Maximum      
Policyholder Account Balance [Line Items]      
Range of Guaranteed Minimum Crediting Rates 3.99% 3.99%  
3% - 3.99% | Universal life insurance | At Guaranteed Minimum      
Policyholder Account Balance [Line Items]      
Policyholder account balances $ 860 $ 885  
3% - 3.99% | Universal life insurance | 1-49 bps above Guaranteed Minimum      
Policyholder Account Balance [Line Items]      
Policyholder account balances 1 1  
3% - 3.99% | Universal life insurance | 50-99 bps above Guaranteed Minimum      
Policyholder Account Balance [Line Items]      
Policyholder account balances 4 2  
3% - 3.99% | Universal life insurance | 100-150 bps above Guaranteed Minimum      
Policyholder Account Balance [Line Items]      
Policyholder account balances 3 0  
3% - 3.99% | Universal life insurance | Greater than 150 bps above Guaranteed Minimum      
Policyholder Account Balance [Line Items]      
Policyholder account balances 0 0  
3% - 3.99% | Fixed accounts of variable universal life insurance      
Policyholder Account Balance [Line Items]      
Policyholder account balances $ 134 $ 137  
3% - 3.99% | Fixed accounts of variable universal life insurance | Minimum      
Policyholder Account Balance [Line Items]      
Range of Guaranteed Minimum Crediting Rates 3.00% 3.00%  
3% - 3.99% | Fixed accounts of variable universal life insurance | Maximum      
Policyholder Account Balance [Line Items]      
Range of Guaranteed Minimum Crediting Rates 3.99% 3.99%  
3% - 3.99% | Fixed accounts of variable universal life insurance | At Guaranteed Minimum      
Policyholder Account Balance [Line Items]      
Policyholder account balances $ 125 $ 134  
3% - 3.99% | Fixed accounts of variable universal life insurance | 1-49 bps above Guaranteed Minimum      
Policyholder Account Balance [Line Items]      
Policyholder account balances 1 1  
3% - 3.99% | Fixed accounts of variable universal life insurance | 50-99 bps above Guaranteed Minimum      
Policyholder Account Balance [Line Items]      
Policyholder account balances 4 1  
3% - 3.99% | Fixed accounts of variable universal life insurance | 100-150 bps above Guaranteed Minimum      
Policyholder Account Balance [Line Items]      
Policyholder account balances 4 1  
3% - 3.99% | Fixed accounts of variable universal life insurance | Greater than 150 bps above Guaranteed Minimum      
Policyholder Account Balance [Line Items]      
Policyholder account balances 0 0  
3% - 3.99% | Non-indexed accounts of indexed universal life insurance      
Policyholder Account Balance [Line Items]      
Policyholder account balances $ 0 $ 0  
3% - 3.99% | Non-indexed accounts of indexed universal life insurance | Minimum      
Policyholder Account Balance [Line Items]      
Range of Guaranteed Minimum Crediting Rates 3.00% 3.00%  
3% - 3.99% | Non-indexed accounts of indexed universal life insurance | Maximum      
Policyholder Account Balance [Line Items]      
Range of Guaranteed Minimum Crediting Rates 3.99% 3.99%  
3% - 3.99% | Non-indexed accounts of indexed universal life insurance | At Guaranteed Minimum      
Policyholder Account Balance [Line Items]      
Policyholder account balances $ 0 $ 0  
3% - 3.99% | Non-indexed accounts of indexed universal life insurance | 1-49 bps above Guaranteed Minimum      
Policyholder Account Balance [Line Items]      
Policyholder account balances 0 0  
3% - 3.99% | Non-indexed accounts of indexed universal life insurance | 50-99 bps above Guaranteed Minimum      
Policyholder Account Balance [Line Items]      
Policyholder account balances 0 0  
3% - 3.99% | Non-indexed accounts of indexed universal life insurance | 100-150 bps above Guaranteed Minimum      
Policyholder Account Balance [Line Items]      
Policyholder account balances 0 0  
3% - 3.99% | Non-indexed accounts of indexed universal life insurance | Greater than 150 bps above Guaranteed Minimum      
Policyholder Account Balance [Line Items]      
Policyholder account balances 0 0  
3% - 3.99% | Other life insurance      
Policyholder Account Balance [Line Items]      
Policyholder account balances $ 31 $ 32  
3% - 3.99% | Other life insurance | Minimum      
Policyholder Account Balance [Line Items]      
Range of Guaranteed Minimum Crediting Rates 3.00% 3.00%  
3% - 3.99% | Other life insurance | Maximum      
Policyholder Account Balance [Line Items]      
Range of Guaranteed Minimum Crediting Rates 3.99% 3.99%  
3% - 3.99% | Other life insurance | At Guaranteed Minimum      
Policyholder Account Balance [Line Items]      
Policyholder account balances $ 31 $ 32  
3% - 3.99% | Other life insurance | 1-49 bps above Guaranteed Minimum      
Policyholder Account Balance [Line Items]      
Policyholder account balances 0 0  
3% - 3.99% | Other life insurance | 50-99 bps above Guaranteed Minimum      
Policyholder Account Balance [Line Items]      
Policyholder account balances 0 0  
3% - 3.99% | Other life insurance | 100-150 bps above Guaranteed Minimum      
Policyholder Account Balance [Line Items]      
Policyholder account balances 0 0  
3% - 3.99% | Other life insurance | Greater than 150 bps above Guaranteed Minimum      
Policyholder Account Balance [Line Items]      
Policyholder account balances 0 0  
4% - 5.00% | Total      
Policyholder Account Balance [Line Items]      
Policyholder account balances $ 5,351 $ 5,475  
4% - 5.00% | Total | Minimum      
Policyholder Account Balance [Line Items]      
Range of Guaranteed Minimum Crediting Rates 4.00% 4.00%  
4% - 5.00% | Total | Maximum      
Policyholder Account Balance [Line Items]      
Range of Guaranteed Minimum Crediting Rates 5.00% 5.00%  
4% - 5.00% | Total | At Guaranteed Minimum      
Policyholder Account Balance [Line Items]      
Policyholder account balances $ 5,351 $ 5,475  
4% - 5.00% | Total | 1-49 bps above Guaranteed Minimum      
Policyholder Account Balance [Line Items]      
Policyholder account balances 0 0  
4% - 5.00% | Total | 50-99 bps above Guaranteed Minimum      
Policyholder Account Balance [Line Items]      
Policyholder account balances 0 0  
4% - 5.00% | Total | 100-150 bps above Guaranteed Minimum      
Policyholder Account Balance [Line Items]      
Policyholder account balances 0 0  
4% - 5.00% | Total | Greater than 150 bps above Guaranteed Minimum      
Policyholder Account Balance [Line Items]      
Policyholder account balances 0 0  
4% - 5.00% | Fixed accounts of variable annuities      
Policyholder Account Balance [Line Items]      
Policyholder account balances $ 1,562 $ 1,611  
4% - 5.00% | Fixed accounts of variable annuities | Minimum      
Policyholder Account Balance [Line Items]      
Range of Guaranteed Minimum Crediting Rates 4.00% 4.00%  
4% - 5.00% | Fixed accounts of variable annuities | Maximum      
Policyholder Account Balance [Line Items]      
Range of Guaranteed Minimum Crediting Rates 5.00% 5.00%  
4% - 5.00% | Fixed accounts of variable annuities | At Guaranteed Minimum      
Policyholder Account Balance [Line Items]      
Policyholder account balances $ 1,562 $ 1,611  
4% - 5.00% | Fixed accounts of variable annuities | 1-49 bps above Guaranteed Minimum      
Policyholder Account Balance [Line Items]      
Policyholder account balances 0 0  
4% - 5.00% | Fixed accounts of variable annuities | 50-99 bps above Guaranteed Minimum      
Policyholder Account Balance [Line Items]      
Policyholder account balances 0 0  
4% - 5.00% | Fixed accounts of variable annuities | 100-150 bps above Guaranteed Minimum      
Policyholder Account Balance [Line Items]      
Policyholder account balances 0 0  
4% - 5.00% | Fixed accounts of variable annuities | Greater than 150 bps above Guaranteed Minimum      
Policyholder Account Balance [Line Items]      
Policyholder account balances 0 0  
4% - 5.00% | Fixed accounts of structured variable annuities      
Policyholder Account Balance [Line Items]      
Policyholder account balances $ 0 $ 0  
4% - 5.00% | Fixed accounts of structured variable annuities | Minimum      
Policyholder Account Balance [Line Items]      
Range of Guaranteed Minimum Crediting Rates 4.00% 4.00%  
4% - 5.00% | Fixed accounts of structured variable annuities | Maximum      
Policyholder Account Balance [Line Items]      
Range of Guaranteed Minimum Crediting Rates 5.00% 5.00%  
4% - 5.00% | Fixed accounts of structured variable annuities | At Guaranteed Minimum      
Policyholder Account Balance [Line Items]      
Policyholder account balances $ 0 $ 0  
4% - 5.00% | Fixed accounts of structured variable annuities | 1-49 bps above Guaranteed Minimum      
Policyholder Account Balance [Line Items]      
Policyholder account balances 0 0  
4% - 5.00% | Fixed accounts of structured variable annuities | 50-99 bps above Guaranteed Minimum      
Policyholder Account Balance [Line Items]      
Policyholder account balances 0 0  
4% - 5.00% | Fixed accounts of structured variable annuities | 100-150 bps above Guaranteed Minimum      
Policyholder Account Balance [Line Items]      
Policyholder account balances 0 0  
4% - 5.00% | Fixed accounts of structured variable annuities | Greater than 150 bps above Guaranteed Minimum      
Policyholder Account Balance [Line Items]      
Policyholder account balances 0 0  
4% - 5.00% | Fixed annuities      
Policyholder Account Balance [Line Items]      
Policyholder account balances $ 2,333 $ 2,333  
4% - 5.00% | Fixed annuities | Minimum      
Policyholder Account Balance [Line Items]      
Range of Guaranteed Minimum Crediting Rates 4.00% 4.00%  
4% - 5.00% | Fixed annuities | Maximum      
Policyholder Account Balance [Line Items]      
Range of Guaranteed Minimum Crediting Rates 5.00% 5.00%  
4% - 5.00% | Fixed annuities | At Guaranteed Minimum      
Policyholder Account Balance [Line Items]      
Policyholder account balances $ 2,333 $ 2,333  
4% - 5.00% | Fixed annuities | 1-49 bps above Guaranteed Minimum      
Policyholder Account Balance [Line Items]      
Policyholder account balances 0 0  
4% - 5.00% | Fixed annuities | 50-99 bps above Guaranteed Minimum      
Policyholder Account Balance [Line Items]      
Policyholder account balances 0 0  
4% - 5.00% | Fixed annuities | 100-150 bps above Guaranteed Minimum      
Policyholder Account Balance [Line Items]      
Policyholder account balances 0 0  
4% - 5.00% | Fixed annuities | Greater than 150 bps above Guaranteed Minimum      
Policyholder Account Balance [Line Items]      
Policyholder account balances 0 0  
4% - 5.00% | Non-indexed accounts of fixed indexed annuities      
Policyholder Account Balance [Line Items]      
Policyholder account balances $ 0 $ 0  
4% - 5.00% | Non-indexed accounts of fixed indexed annuities | Minimum      
Policyholder Account Balance [Line Items]      
Range of Guaranteed Minimum Crediting Rates 4.00% 4.00%  
4% - 5.00% | Non-indexed accounts of fixed indexed annuities | Maximum      
Policyholder Account Balance [Line Items]      
Range of Guaranteed Minimum Crediting Rates 5.00% 5.00%  
4% - 5.00% | Non-indexed accounts of fixed indexed annuities | At Guaranteed Minimum      
Policyholder Account Balance [Line Items]      
Policyholder account balances $ 0 $ 0  
4% - 5.00% | Non-indexed accounts of fixed indexed annuities | 1-49 bps above Guaranteed Minimum      
Policyholder Account Balance [Line Items]      
Policyholder account balances 0 0  
4% - 5.00% | Non-indexed accounts of fixed indexed annuities | 50-99 bps above Guaranteed Minimum      
Policyholder Account Balance [Line Items]      
Policyholder account balances 0 0  
4% - 5.00% | Non-indexed accounts of fixed indexed annuities | 100-150 bps above Guaranteed Minimum      
Policyholder Account Balance [Line Items]      
Policyholder account balances 0 0  
4% - 5.00% | Non-indexed accounts of fixed indexed annuities | Greater than 150 bps above Guaranteed Minimum      
Policyholder Account Balance [Line Items]      
Policyholder account balances 0 0  
4% - 5.00% | Universal life insurance      
Policyholder Account Balance [Line Items]      
Policyholder account balances $ 532 $ 569  
4% - 5.00% | Universal life insurance | Minimum      
Policyholder Account Balance [Line Items]      
Range of Guaranteed Minimum Crediting Rates 4.00% 4.00%  
4% - 5.00% | Universal life insurance | Maximum      
Policyholder Account Balance [Line Items]      
Range of Guaranteed Minimum Crediting Rates 5.00% 5.00%  
4% - 5.00% | Universal life insurance | At Guaranteed Minimum      
Policyholder Account Balance [Line Items]      
Policyholder account balances $ 532 $ 569  
4% - 5.00% | Universal life insurance | 1-49 bps above Guaranteed Minimum      
Policyholder Account Balance [Line Items]      
Policyholder account balances 0 0  
4% - 5.00% | Universal life insurance | 50-99 bps above Guaranteed Minimum      
Policyholder Account Balance [Line Items]      
Policyholder account balances 0 0  
4% - 5.00% | Universal life insurance | 100-150 bps above Guaranteed Minimum      
Policyholder Account Balance [Line Items]      
Policyholder account balances 0 0  
4% - 5.00% | Universal life insurance | Greater than 150 bps above Guaranteed Minimum      
Policyholder Account Balance [Line Items]      
Policyholder account balances 0 0  
4% - 5.00% | Fixed accounts of variable universal life insurance      
Policyholder Account Balance [Line Items]      
Policyholder account balances $ 623 $ 648  
4% - 5.00% | Fixed accounts of variable universal life insurance | Minimum      
Policyholder Account Balance [Line Items]      
Range of Guaranteed Minimum Crediting Rates 4.00% 4.00%  
4% - 5.00% | Fixed accounts of variable universal life insurance | Maximum      
Policyholder Account Balance [Line Items]      
Range of Guaranteed Minimum Crediting Rates 5.00% 5.00%  
4% - 5.00% | Fixed accounts of variable universal life insurance | At Guaranteed Minimum      
Policyholder Account Balance [Line Items]      
Policyholder account balances $ 623 $ 648  
4% - 5.00% | Fixed accounts of variable universal life insurance | 1-49 bps above Guaranteed Minimum      
Policyholder Account Balance [Line Items]      
Policyholder account balances 0 0  
4% - 5.00% | Fixed accounts of variable universal life insurance | 50-99 bps above Guaranteed Minimum      
Policyholder Account Balance [Line Items]      
Policyholder account balances 0 0  
4% - 5.00% | Fixed accounts of variable universal life insurance | 100-150 bps above Guaranteed Minimum      
Policyholder Account Balance [Line Items]      
Policyholder account balances 0 0  
4% - 5.00% | Fixed accounts of variable universal life insurance | Greater than 150 bps above Guaranteed Minimum      
Policyholder Account Balance [Line Items]      
Policyholder account balances 0 0  
4% - 5.00% | Non-indexed accounts of indexed universal life insurance      
Policyholder Account Balance [Line Items]      
Policyholder account balances $ 0 $ 0  
4% - 5.00% | Non-indexed accounts of indexed universal life insurance | Minimum      
Policyholder Account Balance [Line Items]      
Range of Guaranteed Minimum Crediting Rates 4.00% 4.00%  
4% - 5.00% | Non-indexed accounts of indexed universal life insurance | Maximum      
Policyholder Account Balance [Line Items]      
Range of Guaranteed Minimum Crediting Rates 5.00% 5.00%  
4% - 5.00% | Non-indexed accounts of indexed universal life insurance | At Guaranteed Minimum      
Policyholder Account Balance [Line Items]      
Policyholder account balances $ 0 $ 0  
4% - 5.00% | Non-indexed accounts of indexed universal life insurance | 1-49 bps above Guaranteed Minimum      
Policyholder Account Balance [Line Items]      
Policyholder account balances 0 0  
4% - 5.00% | Non-indexed accounts of indexed universal life insurance | 50-99 bps above Guaranteed Minimum      
Policyholder Account Balance [Line Items]      
Policyholder account balances 0 0  
4% - 5.00% | Non-indexed accounts of indexed universal life insurance | 100-150 bps above Guaranteed Minimum      
Policyholder Account Balance [Line Items]      
Policyholder account balances 0 0  
4% - 5.00% | Non-indexed accounts of indexed universal life insurance | Greater than 150 bps above Guaranteed Minimum      
Policyholder Account Balance [Line Items]      
Policyholder account balances 0 0  
4% - 5.00% | Other life insurance      
Policyholder Account Balance [Line Items]      
Policyholder account balances $ 301 $ 314  
4% - 5.00% | Other life insurance | Minimum      
Policyholder Account Balance [Line Items]      
Range of Guaranteed Minimum Crediting Rates 4.00% 4.00%  
4% - 5.00% | Other life insurance | Maximum      
Policyholder Account Balance [Line Items]      
Range of Guaranteed Minimum Crediting Rates 5.00% 5.00%  
4% - 5.00% | Other life insurance | At Guaranteed Minimum      
Policyholder Account Balance [Line Items]      
Policyholder account balances $ 301 $ 314  
4% - 5.00% | Other life insurance | 1-49 bps above Guaranteed Minimum      
Policyholder Account Balance [Line Items]      
Policyholder account balances 0 0  
4% - 5.00% | Other life insurance | 50-99 bps above Guaranteed Minimum      
Policyholder Account Balance [Line Items]      
Policyholder account balances 0 0  
4% - 5.00% | Other life insurance | 100-150 bps above Guaranteed Minimum      
Policyholder Account Balance [Line Items]      
Policyholder account balances 0 0  
4% - 5.00% | Other life insurance | Greater than 150 bps above Guaranteed Minimum      
Policyholder Account Balance [Line Items]      
Policyholder account balances $ 0 $ 0