Changes in LFPBs, ASU 2018-12 Transition (Details) - USD ($) $ in Millions	Mar. 31, 2023	Dec. 31, 2022	Mar. 31, 2022	Jan. 01, 2022	Dec. 31, 2021	Jan. 01, 2021	Dec. 31, 2020
Liability for Future Policy Benefit, Activity [Line Items]
Accumulated other comprehensive income (loss)	$ (5,138)	$ (5,931)	$ (2,586)		$ (199)
Future policy benefits	31,970	31,146			39,830
Previously Reported
Liability for Future Policy Benefit, Activity [Line Items]
Accumulated other comprehensive income (loss)		(5,282)			3,901
Future policy benefits		41,105			43,589
Accounting Standards Update 2018-12 | Revision of Prior Period, Accounting Standards Update, Adjustment
Liability for Future Policy Benefit, Activity [Line Items]
Accumulated other comprehensive income (loss)		(649)			(4,100)
Future policy benefits		(9,959)			(3,759)
Term and Whole Life Insurance
Liability for Future Policy Benefit, Activity [Line Items]
Liability for Future Policy Benefit, Expected Future Policy Benefit, Undiscounted, before Reinsurance	7,937		7,974
Liability for Future Policy Benefit, Expected Future Policy Benefit, Cumulative Increase (Decrease) from Cash Flow Change		0		$ 179	0	$ 100
Liability for Future Policy Benefit, Expected Future Policy Benefit, before Reinsurance, after Discount Rate Change	5,254	5,172	5,837		6,253		$ 6,606
Liability for Future Policy Benefit, Reinsurance Recoverable, after Allowance	31	32	40		42
Future policy benefits	$ 2,394	$ 2,336	$ 2,685		$ 2,999
Term and Whole Life Insurance | Accounting Standards Update 2018-12
Liability for Future Policy Benefit, Activity [Line Items]
Liability for Future Policy Benefit, Expected Future Policy Benefit, Undiscounted, before Reinsurance						3,332
Liability for Future Policy Benefit, Reinsurance Recoverable, after Allowance						59
Future policy benefits						3,273
Term and Whole Life Insurance | Accounting Standards Update 2018-12 | Previously Reported
Liability for Future Policy Benefit, Activity [Line Items]
Liability for Future Policy Benefit, Expected Future Policy Benefit, Undiscounted, before Reinsurance							2,797
Term and Whole Life Insurance | Accounting Standards Update 2018-12 | Revision of Prior Period, Accounting Standards Update, Adjustment
Liability for Future Policy Benefit, Activity [Line Items]
Accumulated other comprehensive income (loss)						0
Liability for Future Policy Benefit, Expected Future Policy Benefit, Cumulative Increase (Decrease) from Cash Flow Change						13
Deferred Profit Liabilities						0
Liability for Future Policy Benefit, Expected Future Policy Benefit, before Reinsurance, after Discount Rate Change						522
Income Annuity [Domain] | Accounting Standards Update 2018-12
Liability for Future Policy Benefit, Activity [Line Items]
Liability for Future Policy Benefit, Expected Future Policy Benefit, Undiscounted, before Reinsurance						4,809
Liability for Future Policy Benefit, Reinsurance Recoverable, after Allowance						29
Future policy benefits						4,780
Income Annuity [Domain] | Accounting Standards Update 2018-12 | Previously Reported
Liability for Future Policy Benefit, Activity [Line Items]
Liability for Future Policy Benefit, Expected Future Policy Benefit, Undiscounted, before Reinsurance							4,260
Income Annuity [Domain] | Accounting Standards Update 2018-12 | Revision of Prior Period, Accounting Standards Update, Adjustment
Liability for Future Policy Benefit, Activity [Line Items]
Accumulated other comprehensive income (loss)						(203)
Liability for Future Policy Benefit, Expected Future Policy Benefit, Cumulative Increase (Decrease) from Cash Flow Change						(168)
Deferred Profit Liabilities						172
Liability for Future Policy Benefit, Expected Future Policy Benefit, before Reinsurance, after Discount Rate Change						748
Structured Settlement and Pension Risk Transfer Annuities [Domain] | Accounting Standards Update 2018-12
Liability for Future Policy Benefit, Activity [Line Items]
Liability for Future Policy Benefit, Expected Future Policy Benefit, Undiscounted, before Reinsurance						11,518
Liability for Future Policy Benefit, Reinsurance Recoverable, after Allowance						102
Future policy benefits						11,416
Structured Settlement and Pension Risk Transfer Annuities [Domain] | Accounting Standards Update 2018-12 | Previously Reported
Liability for Future Policy Benefit, Activity [Line Items]
Liability for Future Policy Benefit, Expected Future Policy Benefit, Undiscounted, before Reinsurance							$ 10,115
Structured Settlement and Pension Risk Transfer Annuities [Domain] | Accounting Standards Update 2018-12 | Revision of Prior Period, Accounting Standards Update, Adjustment
Liability for Future Policy Benefit, Activity [Line Items]
Accumulated other comprehensive income (loss)						(1,784)
Liability for Future Policy Benefit, Expected Future Policy Benefit, Cumulative Increase (Decrease) from Cash Flow Change						200
Deferred Profit Liabilities						217
Liability for Future Policy Benefit, Expected Future Policy Benefit, before Reinsurance, after Discount Rate Change						$ 2,770