Deferred Policy Acquisition Costs (Movement Analysis Of Deferred Policy Acquisition Costs) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Movement Analysis of Deferred Policy Acquisition Costs [Roll Forward]
Deferred Policy Acquisition Cost	$ 3,690	$ 3,616	$ 3,512
Deferred Policy Acquisition Cost, Capitalization	632	541	478
Deferred Policy Acquisition Costs, Amortization Expense	(547)	(496)	(405)
Deferred Policy Acquisition Cost, Amortization Expense, Other	93	(36)	22
Deferred Policy Acquisition Cost, Amortization Expense, Unrealized Investment Gains (Losses)	171	33	(26)
Deferred Policy Acquisition Cost, Foreign Currency Translation Adjustment	(65)	32	35
Deferred Policy Acquisition Cost	$ 3,974	$ 3,690	$ 3,616