Loans and Related Allowance for Credit Losses (Commercial Quality Indicators) (Details) - USD ($) $ in Millions		12 Months Ended
		Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss, by Origination Year [Abstract]
Total loans, net	[1]	$ 316,467	$ 321,508
Gross charge-offs
Total		1,435	1,092	$ 985
Commercial
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss, by Origination Year [Abstract]
Year one		27,243	29,806
Year two		21,946	39,814
Year three		28,948	12,512
Year four		9,106	9,535
Year five		6,922	10,387
Prior		24,723	23,271
Revolving Loans		96,705	93,609
Revolving Loans Converted to Term		571	624
Total loans, net		216,164	219,558
Gross charge-offs
Year One		51	29
Year Two		43	36
Year Three		63	37
Year Four		32	24
Year Five		10	35
Prior		335	164
Revolving Loans		133	105
Revolving Loans Converted to Term		53	12
Total		720	442	$ 307
Commercial | Commercial and industrial
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss, by Origination Year [Abstract]
Year one		22,906	23,857
Year two		14,693	28,438
Year three		18,899	8,301
Year four		5,876	6,114
Year five		4,738	4,391
Prior		11,850	12,680
Revolving Loans		96,257	93,175
Revolving Loans Converted to Term		571	624
Total loans, net		175,790	177,580
Gross charge-offs
Year One		22	25
Year Two		32	32
Year Three		51	33
Year Four		25	8
Year Five		5	3
Prior		7	26
Revolving Loans		133	105
Revolving Loans Converted to Term		53	12
Total		328	244
Commercial | Commercial real estate
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss, by Origination Year [Abstract]
Year one		2,472	4,337
Year two		5,910	9,871
Year three		8,849	3,441
Year four		2,717	2,680
Year five		1,685	5,509
Prior		11,538	9,164
Revolving Loans		448	434
Total loans, net		33,619	35,436
Gross charge-offs
Year One		28
Year Two		5
Year Three
Year Four		2	12
Year Five		1	31
Prior		322	137
Total		358	180
Commercial | Equipment lease financing
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss, by Origination Year [Abstract]
Year one		1,865	1,612
Year two		1,343	1,505
Year three		1,200	770
Year four		513	741
Year five		499	487
Prior		1,335	1,427
Total loans, net		6,755	6,542
Gross charge-offs
Year One		1	4
Year Two		6	4
Year Three		12	4
Year Four		5	4
Year Five		4	1
Prior		6	1
Total		34	18
Pass Rated | Commercial | Commercial and industrial
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss, by Origination Year [Abstract]
Year one		22,145	23,019
Year two		13,815	26,657
Year three		17,043	7,562
Year four		5,275	5,783
Year five		4,594	4,110
Prior		11,270	11,982
Revolving Loans		91,389	88,467
Revolving Loans Converted to Term		522	573
Total loans, net		166,053	168,153
Pass Rated | Commercial | Commercial real estate
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss, by Origination Year [Abstract]
Year one		2,331	4,182
Year two		5,575	8,571
Year three		6,875	2,986
Year four		2,232	2,190
Year five		1,220	4,887
Prior		9,685	7,411
Revolving Loans		423	383
Total loans, net		28,341	30,610
Pass Rated | Commercial | Equipment lease financing
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss, by Origination Year [Abstract]
Year one		1,814	1,522
Year two		1,264	1,424
Year three		1,112	689
Year four		478	690
Year five		478	452
Prior		1,305	1,378
Total loans, net		6,451	6,155
Criticized | Commercial | Commercial and industrial
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss, by Origination Year [Abstract]
Year one		761	838
Year two		878	1,781
Year three		1,856	739
Year four		601	331
Year five		144	281
Prior		580	698
Revolving Loans		4,868	4,708
Revolving Loans Converted to Term		49	51
Total loans, net		9,737	9,427
Criticized | Commercial | Commercial real estate
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss, by Origination Year [Abstract]
Year one		141	155
Year two		335	1,300
Year three		1,974	455
Year four		485	490
Year five		465	622
Prior		1,853	1,753
Revolving Loans		25	51
Total loans, net		5,278	4,826
Criticized | Commercial | Equipment lease financing
Financing Receivable, Excluding Accrued Interest, before Allowance for Credit Loss, by Origination Year [Abstract]
Year one		51	90
Year two		79	81
Year three		88	81
Year four		35	51
Year five		21	35
Prior		30	49
Total loans, net		$ 304	$ 387

[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 of $1.2 billion and Other assets of $0.1 billion at December 31, 2024. Comparable amounts at December 31, 2023 were $0.7 billion, $1.2 billion and $0.1 billion, respectively.