Deferred Policy Acquisition Costs (Movement Analysis Of Deferred Policy Acquisition Costs) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Movement Analysis of Deferred Policy Acquisition Costs [Roll Forward]
Deferred Policy Acquisition Cost	$ 3,616	$ 3,512	$ 3,398
Deferred Policy Acquisition Cost, Capitalization	541	478	526
Deferred Policy Acquisition Costs, Amortization Expense	(496)	(405)	(315)
Deferred Policy Acquisition Cost, Amortization Expense, Other	(36)	22	(15)
Deferred Policy Acquisition Cost, Amortization Expense, Unrealized Investment Gains (Losses)	33	(26)	(97)
Deferred Policy Acquisition Cost, Foreign Currency Translation Adjustment	32	35	15
Deferred Policy Acquisition Cost	$ 3,690	$ 3,616	$ 3,512