Loans and Related Allowance for Credit Losses (Commercial Lending Asset Quality Indicators) (Details) - USD ($) $ in Millions		Jun. 30, 2022	Dec. 31, 2021
Financing Receivable, Credit Quality Indicator [Line Items]
Total loans, net	[1]	$ 310,800	$ 288,372
Commercial
Financing Receivable, Credit Quality Indicator [Line Items]
Year one		25,987	33,040
Year two		22,331	18,072
Year three		15,771	19,883
Year four		17,577	13,112
Year five		10,625	10,577
Prior		29,438	23,114
Revolving Loans		90,694	75,160
Revolving Loans Converted to Term		100	120
Total loans, net		212,523	193,078
Commercial | Commercial and industrial
Financing Receivable, Credit Quality Indicator [Line Items]
Year one		20,674	27,387
Year two		17,175	12,421
Year three		10,597	11,546
Year four		9,864	7,347
Year five		5,802	6,851
Prior		17,234	12,583
Revolving Loans		90,385	74,678
Revolving Loans Converted to Term		100	120
Total loans, net		171,831	152,933
Commercial | Commercial real estate
Financing Receivable, Credit Quality Indicator [Line Items]
Year one		4,481	4,404
Year two		4,027	4,407
Year three		4,053	7,354
Year four		6,882	5,054
Year five		4,242	3,200
Prior		10,458	9,114
Revolving Loans		309	482
Total loans, net		34,452	34,015
Commercial | Equipment lease financing
Financing Receivable, Credit Quality Indicator [Line Items]
Year one		832	1,249
Year two		1,129	1,244
Year three		1,121	983
Year four		831	711
Year five		581	526
Prior		1,746	1,417
Total loans, net		6,240	6,130
Pass Rated | Commercial | Commercial and industrial
Financing Receivable, Credit Quality Indicator [Line Items]
Year one		20,359	27,104
Year two		16,777	12,053
Year three		10,272	10,731
Year four		9,215	6,698
Year five		5,342	6,355
Prior		16,371	11,759
Revolving Loans		86,988	71,230
Revolving Loans Converted to Term		74	90
Total loans, net		165,398	146,020
Pass Rated | Commercial | Commercial real estate
Financing Receivable, Credit Quality Indicator [Line Items]
Year one		4,241	4,110
Year two		3,869	4,109
Year three		3,793	6,355
Year four		6,134	4,234
Year five		3,359	2,634
Prior		8,553	7,562
Revolving Loans		260	436
Total loans, net		30,209	29,440
Pass Rated | Commercial | Equipment lease financing
Financing Receivable, Credit Quality Indicator [Line Items]
Year one		817	1,212
Year two		1,078	1,190
Year three		1,065	942
Year four		788	682
Year five		556	507
Prior		1,730	1,410
Total loans, net		6,034	5,943
Criticized | Commercial | Commercial and industrial
Financing Receivable, Credit Quality Indicator [Line Items]
Year one		315	283
Year two		398	368
Year three		325	815
Year four		649	649
Year five		460	496
Prior		863	824
Revolving Loans		3,397	3,448
Revolving Loans Converted to Term		26	30
Total loans, net		6,433	6,913
Criticized | Commercial | Commercial real estate
Financing Receivable, Credit Quality Indicator [Line Items]
Year one		240	294
Year two		158	298
Year three		260	999
Year four		748	820
Year five		883	566
Prior		1,905	1,552
Revolving Loans		49	46
Total loans, net		4,243	4,575
Criticized | Commercial | Equipment lease financing
Financing Receivable, Credit Quality Indicator [Line Items]
Year one		15	37
Year two		51	54
Year three		56	41
Year four		43	29
Year five		25	19
Prior		16	7
Total loans, net		$ 206	$ 187

[1] Our consolidated assets included the following for which we have elected the fair value option: Loans held for sale of $1.0 billion, Loans held for investment of $1.3 billion and Other assets of $0.1 billion at June 30, 2022. Comparable amounts at December 31, 2021 were $1.9 billion, $1.5 billion and $0.1 billion, respectively.