Loans and Related Allowance for Credit Losses (Commercial Lending Asset Quality Indicators) (Details) - USD ($) $ in Millions		6 Months Ended
		Jun. 30, 2023	Dec. 31, 2022
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss, by Origination Year [Abstract]
Total loans, net	[1]	$ 321,761	$ 326,025
Commercial
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss, by Origination Year [Abstract]
Year one		19,137	53,984
Year two		45,499	18,123
Year three		13,805	12,997
Year four		10,329	13,538
Year five		11,365	8,745
Prior		27,079	24,043
Revolving Loans		92,647	93,519
Revolving Loans Converted to Term		96	100
Total loans, net		219,957	225,049
Gross charge-offs
Year one		10
Year two		10
Year three		28
Year four		9
Year five		14
Prior		102
Revolving Loans		74
Revolving Loans Converted to Term		8
Total		255
Commercial | Commercial and industrial
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss, by Origination Year [Abstract]
Year one		15,801	42,944
Year two		34,040	12,916
Year three		8,884	8,411
Year four		6,623	6,560
Year five		4,962	4,506
Prior		14,933	13,716
Revolving Loans		92,290	93,066
Revolving Loans Converted to Term		96	100
Total loans, net		177,629	182,219
Gross charge-offs
Year one		10
Year two		9
Year three		27
Year four		6
Year five		1
Prior		14
Revolving Loans		74
Revolving Loans Converted to Term		8
Total		149
Commercial | Commercial real estate
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss, by Origination Year [Abstract]
Year one		2,648	9,183
Year two		9,722	4,190
Year three		4,026	3,588
Year four		2,834	6,269
Year five		5,807	3,812
Prior		10,534	8,821
Revolving Loans		357	453
Total loans, net		35,928	36,316
Gross charge-offs
Year five		12
Prior		87
Total		99
Commercial | Equipment lease financing
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss, by Origination Year [Abstract]
Year one		688	1,857
Year two		1,737	1,017
Year three		895	998
Year four		872	709
Year five		596	427
Prior		1,612	1,506
Total loans, net		6,400	6,514
Gross charge-offs
Year two		1
Year three		1
Year four		3
Year five		1
Prior		1
Total		7
Pass Rated | Commercial | Commercial and industrial
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss, by Origination Year [Abstract]
Year one		15,699	41,685
Year two		32,220	12,493
Year three		8,328	8,134
Year four		6,279	6,261
Year five		4,694	4,209
Prior		14,114	13,165
Revolving Loans		88,198	89,384
Revolving Loans Converted to Term		61	69
Total loans, net		169,593	175,400
Pass Rated | Commercial | Commercial real estate
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss, by Origination Year [Abstract]
Year one		2,589	8,835
Year two		9,428	4,153
Year three		3,773	3,266
Year four		2,513	5,511
Year five		5,139	3,005
Prior		8,571	7,454
Revolving Loans		339	450
Total loans, net		32,352	32,674
Pass Rated | Commercial | Equipment lease financing
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss, by Origination Year [Abstract]
Year one		658	1,797
Year two		1,673	962
Year three		845	942
Year four		819	670
Year five		559	410
Prior		1,567	1,495
Total loans, net		6,121	6,276
Criticized | Commercial | Commercial and industrial
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss, by Origination Year [Abstract]
Year one		102	1,259
Year two		1,820	423
Year three		556	277
Year four		344	299
Year five		268	297
Prior		819	551
Revolving Loans		4,092	3,682
Revolving Loans Converted to Term		35	31
Total loans, net		8,036	6,819
Criticized | Commercial | Commercial real estate
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss, by Origination Year [Abstract]
Year one		59	348
Year two		294	37
Year three		253	322
Year four		321	758
Year five		668	807
Prior		1,963	1,367
Revolving Loans		18	3
Total loans, net		3,576	3,642
Criticized | Commercial | Equipment lease financing
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss, by Origination Year [Abstract]
Year one		30	60
Year two		64	55
Year three		50	56
Year four		53	39
Year five		37	17
Prior		45	11
Total loans, net		$ 279	$ 238

[1] Our consolidated assets included the following for which we have elected the fair value option: Loans held for sale of $0.8 billion, Loans held for investment of $1.3 billion and Other assets of $0.1 billion at June 30, 2023. Comparable amounts at December 31, 2022 were $0.9 billion, $1.3 billion and $0.1 billion, respectively.