Segment Information (Reconciliation Of Reportable Segments Operating Gain To Income Before Income Tax Expense Included In The Consolidated Statements Of Income) (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Segment Reporting [Abstract]
Reportable segments operating gain	$ 2,059	$ 201	$ 6,301	$ 5,755
Net investment income	335	280	1,026	591
Net realized (losses) gains on financial instruments	(61)	229	107	177
Interest expense	(201)	(198)	(598)	(593)
Amortization of other intangible assets	(136)	(93)	(306)	(269)
(Loss) gain on extinguishment of debt	0	(30)	(5)	(34)
Income before income tax expense	$ 1,996	$ 389	$ 6,525	$ 5,627