Income Tax (Tax Effects of Temporary Differences that Give Rise to Significant Portions of the Deferred Income Tax Asset and Liabilities) (Details) - USD ($) $ in Millions	Dec. 31, 2021	Dec. 31, 2020
Deferred Tax Assets, Net [Abstract]
Deferred Tax Assets, Tax Deferred Expense, Reserves and Accruals	$ 85	$ 92
Deferred Tax Assets, Operating Loss Carryforwards	251	254
Deferred Tax Assets, Tax Credit Carryforwards	50	0
Deferred Tax Assets, Other Tax Carryforwards	3	0
Deferred Tax Assets, Gross	389	346
Deferred Tax Assets, Valuation Allowance	(218)	(251)
Deferred Tax Assets, Net	171	95
Deferred Tax Liabilities [Abstract]
Deferred Tax Liabilities, Deferred Expense, Deferred Policy Acquisition Cost	754	775
Deferred Tax Liabilities Reinsurance Transactions	1,085	1,105
Deferred Tax Liabilities, Investments	793	1,043
Deferred Tax Liabilities, Undistributed Foreign Earnings	260	354
Deferred Tax Liabilities, Unrealized Currency Transaction Gains	66	40
Deferred Tax Liabilities, Prepaid Expenses	58	20
Total Deferred Income Tax Liabilities	3,016	3,339
Deferred Tax Liabilities, Net	2,845	3,244
Balance Sheet Presentation Of Deferred Tax Liabilities [Abstract]
Deferred Tax Assets, Other	41	19
Deferred income taxes	2,886	3,263
Deferred Tax Liabilities, Net	2,845	3,244
Deferred Tax Liabilities, Other	$ 0	$ 2