Securitizations and Variable Interest Entities, Transactions with Consolidated VIEs (Details) - USD ($) $ in Millions	Jun. 30, 2023		Dec. 31, 2022		Jun. 30, 2022
Variable Interest Entity [Line Items]
Assets	$ 1,876,320	[1]	$ 1,881,020	[1]	$ 1,881,141
Total loans	947,960		955,871		$ 943,734
Total Commercial [Member]
Variable Interest Entity [Line Items]
Total loans	555,621		557,516
VIEs that we consolidate [Member]
Variable Interest Entity [Line Items]
Assets	7,417		7,220
VIEs that we consolidate [Member] | Other [Member]
Variable Interest Entity [Line Items]
Assets	72		72
VIEs that we consolidate [Member] | Total Commercial [Member] | Commercial and industrial loans and leases [Member]
Variable Interest Entity [Line Items]
Assets	7,345		7,148
VIEs that we consolidate [Member] | Carrying value [Member]
Variable Interest Entity [Line Items]
Assets	5,200		5,100
Total loans	4,947		4,802
Debt securities	71		71
All other assets	205		191
Liabilities	(208)		(201)
VIEs that we consolidate [Member] | Carrying value [Member] | Other [Member]
Variable Interest Entity [Line Items]
Total loans	0		0
Debt securities	71		71
All other assets	1		1
Liabilities	(72)		(72)
VIEs that we consolidate [Member] | Carrying value [Member] | Total Commercial [Member] | Commercial and industrial loans and leases [Member]
Variable Interest Entity [Line Items]
Total loans	4,947		4,802
Debt securities	0		0
All other assets	204		190
Liabilities	$ (136)		$ (129)

[1] Our consolidated assets at June 30, 2023, and December 31, 2022, include the following assets of certain variable interest entities (VIEs) that can only be used to settle the liabilities of those VIEs: Debt securities, $71 million and $71 million; Loans, $4.9 billion and $4.8 billion; All other assets, $205 million and $191 million; and Total assets, $5.2 billion and $5.1 billion, respectively.