Accounting Changes and Error Corrections (Impact at Adoption) (Details) - USD ($) $ in Millions	Mar. 31, 2023	Dec. 31, 2022	Mar. 31, 2022	Dec. 31, 2021	Jan. 01, 2021	Dec. 31, 2020
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Reinsurance Recoverables, Including Reinsurance Premium Paid	$ 2,723	$ 2,671
Future policy benefits	38,222	35,689	$ 42,406
Market Risk Benefit, Net Amount at Risk	261	247
Deferred policy acquisition costs	4,257	4,128	3,906
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest	$ 7,716	7,171	$ 8,037	$ 8,180
Accounting Standards Update 2018-12
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Reinsurance Recoverables, Including Reinsurance Premium Paid		2,671		3,165
Future policy benefits		35,689		47,449
Market Risk Benefit, Net Amount at Risk		247		262
Deferred policy acquisition costs		4,128		3,860
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest		$ 7,171		$ 8,180		$ 6,839
Accounting Standards Update 2018-12 | Revision of Prior Period, Accounting Standards Update, Adjustment | Retained Earnings [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Reinsurance Recoverables, Including Reinsurance Premium Paid					$ 254
Future policy benefits					(1,746)
Market Risk Benefit, Net Amount at Risk					(72)
Deferred policy acquisition costs					0
Deferred Tax Assets, Other					8
Deferred Tax Liabilities, Tax Deferred Income					311
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest					(1,245)
Accounting Standards Update 2018-12 | Revision of Prior Period, Accounting Standards Update, Adjustment | AOCI Attributable to Parent [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Reinsurance Recoverables, Including Reinsurance Premium Paid					388
Future policy benefits					(8,593)
Market Risk Benefit, Net Amount at Risk					45
Deferred policy acquisition costs					114
Deferred Tax Assets, Other					0
Deferred Tax Liabilities, Tax Deferred Income					1,778
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest					$ (6,268)