Segment Information (Reconciliation Of Income Before Income Tax Expense To Reportable Segments Operating Gain Included 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]
Income before income tax expense	$ 2,441	$ 2,122	$ 5,060	$ 4,428
Net investment income	(416)	(381)	(803)	(741)
Net losses (gains) on financial instruments	121	231	234	382
Interest expense	261	208	512	409
Amortization of other intangible assets	221	166	456	295
Reportable segments operating gain	$ 2,628	$ 2,346	$ 5,459	$ 4,773