Segment Information (Reconciliation Of Reportable Segments Operating Revenues To Total Revenues Reported In The Consolidated Statements Of Income) (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2023	Jun. 30, 2022
Segment Reporting [Abstract]
Total operating revenue	$ 43,377	$ 38,482	$ 85,275	$ 76,368
Net investment income	416	381	803	741
Net losses on financial instruments	(121)	(231)	(234)	(382)
Total revenues	$ 43,672	$ 38,632	$ 85,844	$ 76,727