Fair Value Measurements - Fair Vaue Measurement (Details) - USD ($) $ in Millions	Dec. 31, 2021	Dec. 31, 2020
Assets:
Derivatives	$ 149	$ 145
Separate Account Asset	96,964	87,319
Liabilities:
Derivatives	144	216
Assets measured on recurring basis
Assets:
Fixed maturities including securities pledged, Fair Value	26,412	29,993
Cash, Cash Equivalents, and Short-term Investments	1,244	626
Separate Account Asset	96,964	87,319
Total assets, fair value	$ 124,910	$ 118,199
Percentage of Level to total	100.00%	100.00%
Liabilities:
Financial and Nonfinancial Liabilities, Fair Value Disclosure	$ 173	$ 279
Assets measured on recurring basis | Level 1
Assets:
Fixed maturities including securities pledged, Fair Value	510	548
Cash, Cash Equivalents, and Short-term Investments	1,244	610
Separate Account Asset	91,474	81,096
Total assets, fair value	$ 93,255	$ 82,278
Percentage of Level to total	74.00%	69.00%
Liabilities:
Financial and Nonfinancial Liabilities, Fair Value Disclosure	$ 0	$ 0
Assets measured on recurring basis | Level 2
Assets:
Fixed maturities including securities pledged, Fair Value	24,179	27,737
Cash, Cash Equivalents, and Short-term Investments	0	16
Separate Account Asset	5,174	6,001
Total assets, fair value	$ 29,502	$ 33,892
Percentage of Level to total	24.00%	29.00%
Liabilities:
Financial and Nonfinancial Liabilities, Fair Value Disclosure	$ 144	$ 216
Assets measured on recurring basis | Level 3
Assets:
Fixed maturities including securities pledged, Fair Value	1,723	1,708
Cash, Cash Equivalents, and Short-term Investments	0	0
Separate Account Asset	316	222
Total assets, fair value	$ 2,153	$ 2,029
Percentage of Level to total	2.00%	2.00%
Liabilities:
Financial and Nonfinancial Liabilities, Fair Value Disclosure	$ 29	$ 63
Fixed maturities
Assets:
Fixed maturities including securities pledged, Fair Value	26,412	29,993
U.S. Treasuries
Assets:
Fixed maturities including securities pledged, Fair Value	691	721
U.S. Treasuries | Assets measured on recurring basis
Assets:
Fixed maturities including securities pledged, Fair Value	691	721
U.S. Treasuries | Assets measured on recurring basis | Level 1
Assets:
Fixed maturities including securities pledged, Fair Value	510	548
U.S. Treasuries | Assets measured on recurring basis | Level 2
Assets:
Fixed maturities including securities pledged, Fair Value	181	173
U.S. Treasuries | Assets measured on recurring basis | Level 3
Assets:
Fixed maturities including securities pledged, Fair Value	0	0
U.S. Government agencies and authorities
Assets:
Fixed maturities including securities pledged, Fair Value	20	19
U.S. Government agencies and authorities | Assets measured on recurring basis
Assets:
Fixed maturities including securities pledged, Fair Value	20	19
U.S. Government agencies and authorities | Assets measured on recurring basis | Level 1
Assets:
Fixed maturities including securities pledged, Fair Value	0	0
U.S. Government agencies and authorities | Assets measured on recurring basis | Level 2
Assets:
Fixed maturities including securities pledged, Fair Value	20	19
U.S. Government agencies and authorities | Assets measured on recurring basis | Level 3
Assets:
Fixed maturities including securities pledged, Fair Value	0	0
State, municipalities and political subdivisions
Assets:
Fixed maturities including securities pledged, Fair Value	803	814
State, municipalities and political subdivisions | Assets measured on recurring basis
Assets:
Fixed maturities including securities pledged, Fair Value	803	814
State, municipalities and political subdivisions | Assets measured on recurring basis | Level 1
Assets:
Fixed maturities including securities pledged, Fair Value	0	0
State, municipalities and political subdivisions | Assets measured on recurring basis | Level 2
Assets:
Fixed maturities including securities pledged, Fair Value	803	814
State, municipalities and political subdivisions | Assets measured on recurring basis | Level 3
Assets:
Fixed maturities including securities pledged, Fair Value	0	0
U.S. corporate public securities
Assets:
Fixed maturities including securities pledged, Fair Value	8,269	9,156
U.S. corporate public securities | Assets measured on recurring basis
Assets:
Fixed maturities including securities pledged, Fair Value	8,269	9,156
U.S. corporate public securities | Assets measured on recurring basis | Level 1
Assets:
Fixed maturities including securities pledged, Fair Value	0	0
U.S. corporate public securities | Assets measured on recurring basis | Level 2
Assets:
Fixed maturities including securities pledged, Fair Value	8,264	9,099
U.S. corporate public securities | Assets measured on recurring basis | Level 3
Assets:
Fixed maturities including securities pledged, Fair Value	5	57
U.S. corporate private securities
Assets:
Fixed maturities including securities pledged, Fair Value	3,939	4,379
U.S. corporate private securities | Assets measured on recurring basis
Assets:
Fixed maturities including securities pledged, Fair Value	3,939	4,379
U.S. corporate private securities | Assets measured on recurring basis | Level 1
Assets:
Fixed maturities including securities pledged, Fair Value	0	0
U.S. corporate private securities | Assets measured on recurring basis | Level 2
Assets:
Fixed maturities including securities pledged, Fair Value	2,560	3,093
U.S. corporate private securities | Assets measured on recurring basis | Level 3
Assets:
Fixed maturities including securities pledged, Fair Value	1,379	1,286
Foreign corporate public securities and foreign governments
Assets:
Fixed maturities including securities pledged, Fair Value	2,591	2,951
Foreign corporate public securities and foreign governments | Assets measured on recurring basis
Assets:
Fixed maturities including securities pledged, Fair Value	2,591	2,951
Foreign corporate public securities and foreign governments | Assets measured on recurring basis | Level 1
Assets:
Fixed maturities including securities pledged, Fair Value	0	0
Foreign corporate public securities and foreign governments | Assets measured on recurring basis | Level 2
Assets:
Fixed maturities including securities pledged, Fair Value	2,591	2,951
Foreign corporate public securities and foreign governments | Assets measured on recurring basis | Level 3
Assets:
Fixed maturities including securities pledged, Fair Value	0	0
Foreign corporate private securities
Assets:
Fixed maturities including securities pledged, Fair Value	2,703	3,303
Foreign corporate private securities | Assets measured on recurring basis
Assets:
Fixed maturities including securities pledged, Fair Value	2,703	3,303
Foreign corporate private securities | Assets measured on recurring basis | Level 1
Assets:
Fixed maturities including securities pledged, Fair Value	0	0
Foreign corporate private securities | Assets measured on recurring basis | Level 2
Assets:
Fixed maturities including securities pledged, Fair Value	2,431	3,008
Foreign corporate private securities | Assets measured on recurring basis | Level 3
Assets:
Fixed maturities including securities pledged, Fair Value	272	295
Residential mortgage-backed securities
Assets:
Fixed maturities including securities pledged, Fair Value	3,164	4,237
Residential mortgage-backed securities | Assets measured on recurring basis
Assets:
Fixed maturities including securities pledged, Fair Value	3,164	4,237
Residential mortgage-backed securities | Assets measured on recurring basis | Level 1
Assets:
Fixed maturities including securities pledged, Fair Value	0	0
Residential mortgage-backed securities | Assets measured on recurring basis | Level 2
Assets:
Fixed maturities including securities pledged, Fair Value	3,130	4,204
Residential mortgage-backed securities | Assets measured on recurring basis | Level 3
Assets:
Fixed maturities including securities pledged, Fair Value	34	33
Commercial mortgage-backed securities
Assets:
Fixed maturities including securities pledged, Fair Value	2,881	2,893
Commercial mortgage-backed securities | Assets measured on recurring basis
Assets:
Fixed maturities including securities pledged, Fair Value	2,881	2,893
Commercial mortgage-backed securities | Assets measured on recurring basis | Level 1
Assets:
Fixed maturities including securities pledged, Fair Value	0	0
Commercial mortgage-backed securities | Assets measured on recurring basis | Level 2
Assets:
Fixed maturities including securities pledged, Fair Value	2,881	2,893
Commercial mortgage-backed securities | Assets measured on recurring basis | Level 3
Assets:
Fixed maturities including securities pledged, Fair Value	0	0
Asset-backed Securities [Member]
Assets:
Fixed maturities including securities pledged, Fair Value	1,351	1,520
Asset-backed Securities [Member] | Assets measured on recurring basis
Assets:
Fixed maturities including securities pledged, Fair Value	1,351	1,520
Asset-backed Securities [Member] | Assets measured on recurring basis | Level 1
Assets:
Fixed maturities including securities pledged, Fair Value	0	0
Asset-backed Securities [Member] | Assets measured on recurring basis | Level 2
Assets:
Fixed maturities including securities pledged, Fair Value	1,318	1,483
Asset-backed Securities [Member] | Assets measured on recurring basis | Level 3
Assets:
Fixed maturities including securities pledged, Fair Value	33	37
Equity Securities [Member] | Assets measured on recurring basis
Assets:
Equity Securities, FV-NI	141	116
Equity Securities [Member] | Assets measured on recurring basis | Level 1
Assets:
Equity Securities, FV-NI	27	17
Equity Securities [Member] | Assets measured on recurring basis | Level 2
Assets:
Equity Securities, FV-NI	0	0
Equity Securities [Member] | Assets measured on recurring basis | Level 3
Assets:
Equity Securities, FV-NI	114	99
FIA | Assets measured on recurring basis
Liabilities:
Guaranteed benefit derivatives	9	10
FIA | Assets measured on recurring basis | Level 1
Liabilities:
Guaranteed benefit derivatives	0	0
FIA | Assets measured on recurring basis | Level 2
Liabilities:
Guaranteed benefit derivatives	0	0
FIA | Assets measured on recurring basis | Level 3
Liabilities:
Guaranteed benefit derivatives	9	10
Stabilizer and MCGs | Assets measured on recurring basis
Liabilities:
Guaranteed benefit derivatives	20	53
Stabilizer and MCGs | Assets measured on recurring basis | Level 1
Liabilities:
Guaranteed benefit derivatives	0	0
Stabilizer and MCGs | Assets measured on recurring basis | Level 2
Liabilities:
Guaranteed benefit derivatives	0	0
Stabilizer and MCGs | Assets measured on recurring basis | Level 3
Liabilities:
Guaranteed benefit derivatives	20	53
Interest rate contracts | Assets measured on recurring basis
Assets:
Derivatives	135	137
Liabilities:
Derivatives	129	171
Interest rate contracts | Assets measured on recurring basis | Level 1
Assets:
Derivatives	0	7
Liabilities:
Derivatives	0	0
Interest rate contracts | Assets measured on recurring basis | Level 2
Assets:
Derivatives	135	130
Liabilities:
Derivatives	129	171
Interest rate contracts | Assets measured on recurring basis | Level 3
Assets:
Derivatives	0	0
Liabilities:
Derivatives	0	0
Foreign exchange contracts | Assets measured on recurring basis
Assets:
Derivatives	14	3
Liabilities:
Derivatives	15	39
Foreign exchange contracts | Assets measured on recurring basis | Level 1
Assets:
Derivatives	0	0
Liabilities:
Derivatives	0	0
Foreign exchange contracts | Assets measured on recurring basis | Level 2
Assets:
Derivatives	14	3
Liabilities:
Derivatives	15	39
Foreign exchange contracts | Assets measured on recurring basis | Level 3
Assets:
Derivatives	0	0
Liabilities:
Derivatives	0	0
Equity contracts | Assets measured on recurring basis
Assets:
Derivatives	0	5
Liabilities:
Derivatives	0	5
Equity contracts | Assets measured on recurring basis | Level 1
Assets:
Derivatives	0	0
Liabilities:
Derivatives	0	0
Equity contracts | Assets measured on recurring basis | Level 2
Assets:
Derivatives	0	5
Liabilities:
Derivatives	0	5
Equity contracts | Assets measured on recurring basis | Level 3
Assets:
Derivatives	0	0
Liabilities:
Derivatives	0	0
Credit contracts | Assets measured on recurring basis
Assets:
Derivatives	0
Credit contracts | Assets measured on recurring basis | Level 1
Assets:
Derivatives	0
Credit contracts | Assets measured on recurring basis | Level 2
Assets:
Derivatives	0
Credit contracts | Assets measured on recurring basis | Level 3
Assets:
Derivatives	0
Credit contracts | Assets measured on recurring basis
Liabilities:
Derivatives	0	1
Credit contracts | Assets measured on recurring basis | Level 1
Liabilities:
Derivatives	0	0
Credit contracts | Assets measured on recurring basis | Level 2
Liabilities:
Derivatives	0	1
Credit contracts | Assets measured on recurring basis | Level 3
Liabilities:
Derivatives	$ 0	$ 0