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		6 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020
Segment Reporting [Abstract]
Reportable segments operating gain	$ 2,081	$ 3,360	$ 4,242	$ 5,554
Net investment income	400	57	691	311
Net realized gains (losses) on financial instruments	172	29	168	(52)
Interest expense	(205)	(201)	(397)	(395)
Amortization of other intangible assets	(90)	(93)	(170)	(176)
(Loss) gain on extinguishment of debt	(5)	(3)	(5)	(4)
Income before income tax expense	$ 2,353	$ 3,149	$ 4,529	$ 5,238