Variable Interest Entities (VIEs) (Impact Of VIEs On The Consolidated Statements Of Comprehensive Income) (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2024	Jun. 30, 2023	Jun. 30, 2024	Jun. 30, 2023
Provision for income taxes:
Total provision for income taxes	$ 63	$ 83	$ 92	$ 168
Other noninterest income	17	25	40	41
Variable Interest Entity
Provision for income taxes:
Total provision for income taxes	(4)	(4)	(7)	(8)
Low income housing tax credits | Variable Interest Entity
Provision for income taxes:
Amortization of investments	20	17	39	34
Low income housing tax credits and other tax benefits related to tax credit entities	(21)	(16)	(38)	(32)
Other tax benefits related to tax credit entities | Variable Interest Entity
Provision for income taxes:
Low income housing tax credits and other tax benefits related to tax credit entities	$ (3)	$ (5)	$ (8)	$ (10)