Variable Interest Entities (VIEs) (Impact Of VIEs On The Consolidated Statements Of Comprehensive Income) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Variable Interest Entity [Line Items]
Other noninterest income	$ 83	$ 31	$ 88
Provision for income taxes	263	325	322
Variable Interest Entity
Variable Interest Entity [Line Items]
Other noninterest income	(4)	0	1
Provision for income taxes	(17)	(14)	(14)
Low income housing tax credits | Variable Interest Entity
Variable Interest Entity [Line Items]
Provision for income taxes, amortization of LIHTC investments	69	72	71
Provision for income taxes, affordable housing tax credits and other tax benefits	(65)	(68)	(68)
Other tax benefits related to tax credit entities | Variable Interest Entity
Variable Interest Entity [Line Items]
Provision for income taxes, affordable housing tax credits and other tax benefits	$ (21)	$ (18)	$ (17)