Segment Information (Reconciliation Of Revenue From Reportable Segments To The Consolidated Statements Of Income) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Segment Reporting [Abstract]
Reportable segments operating revenues	$ 155,660	$ 136,943	$ 120,808
Net investment income	1,485	1,378	877
Net (losses) gains on financial instruments	(550)	318	182
Total revenues	$ 156,595	$ 138,639	$ 121,867