Goodwill (Details) - USD ($) $ in Millions	3 Months Ended	9 Months Ended
	Dec. 31, 2021	Sep. 30, 2022
Goodwill [Roll Forward]
Beginning balance	$ 2,673	$ 2,693
Goodwill acquired	20	58
XUP acquisition measurement period adjustment		1
Ending balance	2,693	2,752
Consumer Bank
Goodwill [Roll Forward]
Beginning balance	1,761	1,761
Goodwill acquired	0	58
XUP acquisition measurement period adjustment		0
Ending balance	1,761	1,819
Commercial Bank
Goodwill [Roll Forward]
Beginning balance	912	932
Goodwill acquired	20	0
XUP acquisition measurement period adjustment		1
Ending balance	$ 932	$ 933