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Policyholder Account Balances, Future Policy Benefits and Claims - Account Balances by Guaranteed Minimum Interest Rates (Details)
$ in Millions
Jun. 30, 2024
USD ($)
Dec. 31, 2023
USD ($)
Dec. 31, 2022
USD ($)
Policyholder Account Balance [Line Items]      
Policyholder account balances $ 30,373 $ 27,947 $ 24,986
Percentage of total account values that reset in:      
Next 12 months 100.00% 99.90%  
Greater than 12 months to 24 months 0.00% 0.10%  
Greater than 24 months 0.00% 0.00%  
Total 100.00% 100.00%  
At Guaranteed Minimum      
Percentage of total account values that reset in:      
Next 12 months 100.00% 99.90%  
Greater than 12 months to 24 months 0.00% 0.10%  
Greater than 24 months 0.00% 0.00%  
Total 100.00% 100.00%  
1-49 bps above Guaranteed Minimum      
Percentage of total account values that reset in:      
Next 12 months 100.00% 99.50%  
Greater than 12 months to 24 months 0.00% 0.50%  
Greater than 24 months 0.00% 0.00%  
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 99.90% 99.30%  
Greater than 12 months to 24 months 0.00% 0.60%  
Greater than 24 months 0.10% 0.10%  
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 $ 12,172 $ 12,848  
Total | At Guaranteed Minimum      
Policyholder Account Balance [Line Items]      
Policyholder account balances 11,095 11,836  
Total | 1-49 bps above Guaranteed Minimum      
Policyholder Account Balance [Line Items]      
Policyholder account balances 596 571  
Total | 50-99 bps above Guaranteed Minimum      
Policyholder Account Balance [Line Items]      
Policyholder account balances 272 272  
Total | 100-150 bps above Guaranteed Minimum      
Policyholder Account Balance [Line Items]      
Policyholder account balances 163 135  
Total | Greater than 150 bps above Guaranteed Minimum      
Policyholder Account Balance [Line Items]      
Policyholder account balances 46 34  
Fixed accounts of variable annuities      
Policyholder Account Balance [Line Items]      
Policyholder account balances 3,839 4,110  
Fixed accounts of variable annuities | At Guaranteed Minimum      
Policyholder Account Balance [Line Items]      
Policyholder account balances 3,643 3,908  
Fixed accounts of variable annuities | 1-49 bps above Guaranteed Minimum      
Policyholder Account Balance [Line Items]      
Policyholder account balances 112 132  
Fixed accounts of variable annuities | 50-99 bps above Guaranteed Minimum      
Policyholder Account Balance [Line Items]      
Policyholder account balances 64 52  
Fixed accounts of variable annuities | 100-150 bps above Guaranteed Minimum      
Policyholder Account Balance [Line Items]      
Policyholder account balances 18 16  
Fixed accounts of variable annuities | Greater than 150 bps above Guaranteed Minimum      
Policyholder Account Balance [Line Items]      
Policyholder account balances 2 2  
Fixed accounts of structured variable annuities      
Policyholder Account Balance [Line Items]      
Policyholder account balances 42 39  
Fixed accounts of structured variable annuities | At Guaranteed Minimum      
Policyholder Account Balance [Line Items]      
Policyholder account balances 13 12  
Fixed accounts of structured variable annuities | 1-49 bps above Guaranteed Minimum      
Policyholder Account Balance [Line Items]      
Policyholder account balances 23 18  
Fixed accounts of structured variable annuities | 50-99 bps above Guaranteed Minimum      
Policyholder Account Balance [Line Items]      
Policyholder account balances 4 7  
Fixed accounts of structured variable annuities | 100-150 bps above Guaranteed Minimum      
Policyholder Account Balance [Line Items]      
Policyholder account balances 2 2  
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 5,617 5,967  
Fixed annuities | At Guaranteed Minimum      
Policyholder Account Balance [Line Items]      
Policyholder account balances 5,033 5,298  
Fixed annuities | 1-49 bps above Guaranteed Minimum      
Policyholder Account Balance [Line Items]      
Policyholder account balances 296 392  
Fixed annuities | 50-99 bps above Guaranteed Minimum      
Policyholder Account Balance [Line Items]      
Policyholder account balances 175 184  
Fixed annuities | 100-150 bps above Guaranteed Minimum      
Policyholder Account Balance [Line Items]      
Policyholder account balances 113 93  
Fixed annuities | Greater than 150 bps above Guaranteed Minimum      
Policyholder Account Balance [Line Items]      
Policyholder account balances 0 0  
Non-indexed accounts of fixed indexed annuities      
Policyholder Account Balance [Line Items]      
Policyholder account balances 21 22  
Non-indexed accounts of fixed indexed annuities | At Guaranteed Minimum      
Policyholder Account Balance [Line Items]      
Policyholder account balances 0 0  
Non-indexed accounts of fixed indexed annuities | 1-49 bps above Guaranteed Minimum      
Policyholder Account Balance [Line Items]      
Policyholder account balances 2 2  
Non-indexed accounts of fixed indexed annuities | 50-99 bps above Guaranteed Minimum      
Policyholder Account Balance [Line Items]      
Policyholder account balances 6 7  
Non-indexed accounts of fixed indexed annuities | 100-150 bps above Guaranteed Minimum      
Policyholder Account Balance [Line Items]      
Policyholder account balances 13 13  
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 1,411 1,445  
Universal life insurance | At Guaranteed Minimum      
Policyholder Account Balance [Line Items]      
Policyholder account balances 1,383 1,423  
Universal life insurance | 1-49 bps above Guaranteed Minimum      
Policyholder Account Balance [Line Items]      
Policyholder account balances 6 5  
Universal life insurance | 50-99 bps above Guaranteed Minimum      
Policyholder Account Balance [Line Items]      
Policyholder account balances 16 13  
Universal life insurance | 100-150 bps above Guaranteed Minimum      
Policyholder Account Balance [Line Items]      
Policyholder account balances 5 4  
Universal life insurance | Greater than 150 bps above Guaranteed Minimum      
Policyholder Account Balance [Line Items]      
Policyholder account balances 1 0  
Fixed accounts of variable universal life insurance      
Policyholder Account Balance [Line Items]      
Policyholder account balances 799 810  
Fixed accounts of variable universal life insurance | At Guaranteed Minimum      
Policyholder Account Balance [Line Items]      
Policyholder account balances 710 742  
Fixed accounts of variable universal life insurance | 1-49 bps above Guaranteed Minimum      
Policyholder Account Balance [Line Items]      
Policyholder account balances 29 22  
Fixed accounts of variable universal life insurance | 50-99 bps above Guaranteed Minimum      
Policyholder Account Balance [Line Items]      
Policyholder account balances 7 7  
Fixed accounts of variable universal life insurance | 100-150 bps above Guaranteed Minimum      
Policyholder Account Balance [Line Items]      
Policyholder account balances 10 7  
Fixed accounts of variable universal life insurance | Greater than 150 bps above Guaranteed Minimum      
Policyholder Account Balance [Line Items]      
Policyholder account balances 43 32  
Non-indexed accounts of indexed universal life insurance      
Policyholder Account Balance [Line Items]      
Policyholder account balances 130 130  
Non-indexed accounts of indexed universal life insurance | At Guaranteed Minimum      
Policyholder Account Balance [Line Items]      
Policyholder account balances 0 128  
Non-indexed accounts of indexed universal life insurance | 1-49 bps above Guaranteed Minimum      
Policyholder Account Balance [Line Items]      
Policyholder account balances 128 0  
Non-indexed accounts of indexed universal life insurance | 50-99 bps above Guaranteed Minimum      
Policyholder Account Balance [Line Items]      
Policyholder account balances 0 2  
Non-indexed accounts of indexed universal life insurance | 100-150 bps above Guaranteed Minimum      
Policyholder Account Balance [Line Items]      
Policyholder account balances 2 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 313 325  
Other life insurance | At Guaranteed Minimum      
Policyholder Account Balance [Line Items]      
Policyholder account balances 313 325  
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 $ 974 $ 1,085  
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 $ 124 $ 151  
1% - 1.99% | Total | 1-49 bps above Guaranteed Minimum      
Policyholder Account Balance [Line Items]      
Policyholder account balances 414 530  
1% - 1.99% | Total | 50-99 bps above Guaranteed Minimum      
Policyholder Account Balance [Line Items]      
Policyholder account balances 253 255  
1% - 1.99% | Total | 100-150 bps above Guaranteed Minimum      
Policyholder Account Balance [Line Items]      
Policyholder account balances 147 123  
1% - 1.99% | Total | Greater than 150 bps above Guaranteed Minimum      
Policyholder Account Balance [Line Items]      
Policyholder account balances 36 26  
1% - 1.99% | Fixed accounts of variable annuities      
Policyholder Account Balance [Line Items]      
Policyholder account balances $ 220 $ 243  
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 $ 29 $ 43  
1% - 1.99% | Fixed accounts of variable annuities | 1-49 bps above Guaranteed Minimum      
Policyholder Account Balance [Line Items]      
Policyholder account balances 108 131  
1% - 1.99% | Fixed accounts of variable annuities | 50-99 bps above Guaranteed Minimum      
Policyholder Account Balance [Line Items]      
Policyholder account balances 64 52  
1% - 1.99% | Fixed accounts of variable annuities | 100-150 bps above Guaranteed Minimum      
Policyholder Account Balance [Line Items]      
Policyholder account balances 17 15  
1% - 1.99% | Fixed accounts of variable annuities | Greater than 150 bps above Guaranteed Minimum      
Policyholder Account Balance [Line Items]      
Policyholder account balances 2 2  
1% - 1.99% | Fixed accounts of structured variable annuities      
Policyholder Account Balance [Line Items]      
Policyholder account balances $ 31 $ 28  
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 $ 2 $ 1  
1% - 1.99% | Fixed accounts of structured variable annuities | 1-49 bps above Guaranteed Minimum      
Policyholder Account Balance [Line Items]      
Policyholder account balances 23 18  
1% - 1.99% | Fixed accounts of structured variable annuities | 50-99 bps above Guaranteed Minimum      
Policyholder Account Balance [Line Items]      
Policyholder account balances 4 7  
1% - 1.99% | Fixed accounts of structured variable annuities | 100-150 bps above Guaranteed Minimum      
Policyholder Account Balance [Line Items]      
Policyholder account balances 2 2  
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 $ 660 $ 760  
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 $ 93 $ 107  
1% - 1.99% | Fixed annuities | 1-49 bps above Guaranteed Minimum      
Policyholder Account Balance [Line Items]      
Policyholder account balances 280 377  
1% - 1.99% | Fixed annuities | 50-99 bps above Guaranteed Minimum      
Policyholder Account Balance [Line Items]      
Policyholder account balances 174 183  
1% - 1.99% | Fixed annuities | 100-150 bps above Guaranteed Minimum      
Policyholder Account Balance [Line Items]      
Policyholder account balances 113 93  
1% - 1.99% | Fixed annuities | Greater than 150 bps above Guaranteed Minimum      
Policyholder Account Balance [Line Items]      
Policyholder account balances 0 0  
1% - 1.99% | Non-indexed accounts of fixed indexed annuities      
Policyholder Account Balance [Line Items]      
Policyholder account balances $ 21 $ 22  
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 $ 0  
1% - 1.99% | Non-indexed accounts of fixed indexed annuities | 1-49 bps above Guaranteed Minimum      
Policyholder Account Balance [Line Items]      
Policyholder account balances 2 2  
1% - 1.99% | Non-indexed accounts of fixed indexed annuities | 50-99 bps above Guaranteed Minimum      
Policyholder Account Balance [Line Items]      
Policyholder account balances 6 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 13  
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 $ 40 $ 30  
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 $ 0  
1% - 1.99% | Fixed accounts of variable universal life insurance | 1-49 bps above Guaranteed Minimum      
Policyholder Account Balance [Line Items]      
Policyholder account balances 1 2  
1% - 1.99% | Fixed accounts of variable universal life insurance | 50-99 bps above Guaranteed Minimum      
Policyholder Account Balance [Line Items]      
Policyholder account balances 5 4  
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 34 24  
1% - 1.99% | Non-indexed accounts of indexed universal life insurance      
Policyholder Account Balance [Line Items]      
Policyholder account balances $ 2 $ 2  
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 0 2  
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 2 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 $ 407 $ 425  
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 $ 224 $ 376  
2% - 2.99% | Total | 1-49 bps above Guaranteed Minimum      
Policyholder Account Balance [Line Items]      
Policyholder account balances 159 30  
2% - 2.99% | Total | 50-99 bps above Guaranteed Minimum      
Policyholder Account Balance [Line Items]      
Policyholder account balances 13 10  
2% - 2.99% | Total | 100-150 bps above Guaranteed Minimum      
Policyholder Account Balance [Line Items]      
Policyholder account balances 1 1  
2% - 2.99% | Total | Greater than 150 bps above Guaranteed Minimum      
Policyholder Account Balance [Line Items]      
Policyholder account balances 10 8  
2% - 2.99% | Fixed accounts of variable annuities      
Policyholder Account Balance [Line Items]      
Policyholder account balances $ 125 $ 138  
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 $ 125 $ 137  
2% - 2.99% | Fixed accounts of variable annuities | 1-49 bps above Guaranteed Minimum      
Policyholder Account Balance [Line Items]      
Policyholder account balances 0 1  
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 $ 11 $ 11  
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 $ 11 $ 11  
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 $ 44 $ 51  
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 $ 27 $ 36  
2% - 2.99% | Fixed annuities | 1-49 bps above Guaranteed Minimum      
Policyholder Account Balance [Line Items]      
Policyholder account balances 16 14  
2% - 2.99% | Fixed annuities | 50-99 bps above Guaranteed Minimum      
Policyholder Account Balance [Line Items]      
Policyholder account balances 1 1  
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 $ 66 $ 63  
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 $ 50 $ 51  
2% - 2.99% | Universal life insurance | 1-49 bps above Guaranteed Minimum      
Policyholder Account Balance [Line Items]      
Policyholder account balances 3 3  
2% - 2.99% | Universal life insurance | 50-99 bps above Guaranteed Minimum      
Policyholder Account Balance [Line Items]      
Policyholder account balances 12 9  
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 1 0  
2% - 2.99% | Fixed accounts of variable universal life insurance      
Policyholder Account Balance [Line Items]      
Policyholder account balances $ 33 $ 34  
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 $ 11 $ 13  
2% - 2.99% | Fixed accounts of variable universal life insurance | 1-49 bps above Guaranteed Minimum      
Policyholder Account Balance [Line Items]      
Policyholder account balances 12 12  
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 0  
2% - 2.99% | Fixed accounts of variable universal life insurance | 100-150 bps above Guaranteed Minimum      
Policyholder Account Balance [Line Items]      
Policyholder account balances 1 1  
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 9 8  
2% - 2.99% | Non-indexed accounts of indexed universal life insurance      
Policyholder Account Balance [Line Items]      
Policyholder account balances $ 128 $ 128  
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 $ 0 $ 128  
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 128 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 $ 5,626 $ 6,058  
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 $ 5,599 $ 6,036  
3% - 3.99% | Total | 1-49 bps above Guaranteed Minimum      
Policyholder Account Balance [Line Items]      
Policyholder account balances 6 4  
3% - 3.99% | Total | 50-99 bps above Guaranteed Minimum      
Policyholder Account Balance [Line Items]      
Policyholder account balances 6 7  
3% - 3.99% | Total | 100-150 bps above Guaranteed Minimum      
Policyholder Account Balance [Line Items]      
Policyholder account balances 15 11  
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 $ 2,035 $ 2,215  
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 $ 2,030 $ 2,214  
3% - 3.99% | Fixed accounts of variable annuities | 1-49 bps above Guaranteed Minimum      
Policyholder Account Balance [Line Items]      
Policyholder account balances 4 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 $ 2,585 $ 2,817  
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 $ 2,585 $ 2,816  
3% - 3.99% | Fixed annuities | 1-49 bps above Guaranteed Minimum      
Policyholder Account Balance [Line Items]      
Policyholder account balances 0 1  
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 $ 848 $ 863  
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 $ 839 $ 854  
3% - 3.99% | Universal life insurance | 1-49 bps above Guaranteed Minimum      
Policyholder Account Balance [Line Items]      
Policyholder account balances 0 1  
3% - 3.99% | Universal life insurance | 50-99 bps above Guaranteed Minimum      
Policyholder Account Balance [Line Items]      
Policyholder account balances 4 4  
3% - 3.99% | Universal life insurance | 100-150 bps above Guaranteed Minimum      
Policyholder Account Balance [Line Items]      
Policyholder account balances 5 4  
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 $ 128 $ 133  
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 $ 115 $ 122  
3% - 3.99% | Fixed accounts of variable universal life insurance | 1-49 bps above Guaranteed Minimum      
Policyholder Account Balance [Line Items]      
Policyholder account balances 2 2  
3% - 3.99% | Fixed accounts of variable universal life insurance | 50-99 bps above Guaranteed Minimum      
Policyholder Account Balance [Line Items]      
Policyholder account balances 2 3  
3% - 3.99% | Fixed accounts of variable universal life insurance | 100-150 bps above Guaranteed Minimum      
Policyholder Account Balance [Line Items]      
Policyholder account balances 9 6  
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 $ 30 $ 30  
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 $ 30 $ 30  
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 $ 5,165 $ 5,280  
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 $ 5,148 $ 5,273  
4% - 5.00% | Total | 1-49 bps above Guaranteed Minimum      
Policyholder Account Balance [Line Items]      
Policyholder account balances 17 7  
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 $ 1,459 $ 1,514  
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 $ 1,459 $ 1,514  
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 $ 2,328 $ 2,339  
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 $ 2,328 $ 2,339  
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 $ 497 $ 519  
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 $ 494 $ 518  
4% - 5.00% | Universal life insurance | 1-49 bps above Guaranteed Minimum      
Policyholder Account Balance [Line Items]      
Policyholder account balances 3 1  
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 $ 598 $ 613  
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 $ 584 $ 607  
4% - 5.00% | Fixed accounts of variable universal life insurance | 1-49 bps above Guaranteed Minimum      
Policyholder Account Balance [Line Items]      
Policyholder account balances 14 6  
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 $ 283 $ 295  
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 $ 283 $ 295  
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