Fee-based Revenue from Contracts with Customers (Noninterest Income Disaggregation By Business Segment) (Details) $ in Millions	12 Months Ended
	Dec. 31, 2022 USD ($) segment	Dec. 31, 2021 USD ($)	Dec. 31, 2020 USD ($)
Revenue from Contract with Customer [Abstract]
Number of reportable segments | segment	3
Disaggregation of Revenue [Line Items]
Noninterest income	$ 8,106	$ 8,564	$ 6,955
Operating Segments
Disaggregation of Revenue [Line Items]
Total in-scope noninterest income	5,710	5,758	4,596
Out-of-scope noninterest income	1,814	1,808	1,839
Other Segments
Disaggregation of Revenue [Line Items]
Noninterest income	582	998	520
Retail Banking | Operating Segments
Disaggregation of Revenue [Line Items]
Total in-scope noninterest income	2,422	2,285	1,910
Out-of-scope noninterest income	545	511	609
Noninterest income	2,967	2,796	2,519
Retail Banking | Asset management and brokerage | Operating Segments
Disaggregation of Revenue [Line Items]
Total in-scope noninterest income	528	464	367
Retail Banking | Asset management fees | Operating Segments
Disaggregation of Revenue [Line Items]
Total in-scope noninterest income
Retail Banking | Brokerage fees | Operating Segments
Disaggregation of Revenue [Line Items]
Total in-scope noninterest income	528	464	367
Retail Banking | Card and cash management | Operating Segments
Disaggregation of Revenue [Line Items]
Total in-scope noninterest income	1,244	1,221	993
Retail Banking | Treasury management fees | Operating Segments
Disaggregation of Revenue [Line Items]
Total in-scope noninterest income	40	46	33
Retail Banking | Debit card fees | Operating Segments
Disaggregation of Revenue [Line Items]
Total in-scope noninterest income	684	665	522
Retail Banking | Net credit card fees | In-Scope Retail Banking Noninterest Income
Disaggregation of Revenue [Line Items]
Interchange fees	662	582	469
Credit card reward costs	425	361	290
Retail Banking | Net credit card fees | Operating Segments
Disaggregation of Revenue [Line Items]
Total in-scope noninterest income	237	221	179
Retail Banking | Merchant services | Operating Segments
Disaggregation of Revenue [Line Items]
Total in-scope noninterest income	186	174	154
Retail Banking | Other | Operating Segments
Disaggregation of Revenue [Line Items]
Total in-scope noninterest income	97	115	105
Retail Banking | Lending and deposit services | Operating Segments
Disaggregation of Revenue [Line Items]
Total in-scope noninterest income	650	600	550
Retail Banking | Deposit account fees | Operating Segments
Disaggregation of Revenue [Line Items]
Total in-scope noninterest income	583	542	497
Retail Banking | Other | Operating Segments
Disaggregation of Revenue [Line Items]
Total in-scope noninterest income	67	58	53
Corporate & Institutional Banking | Operating Segments
Disaggregation of Revenue [Line Items]
Total in-scope noninterest income	2,372	2,500	1,850
Out-of-scope noninterest income	1,249	1,283	1,212
Noninterest income	3,621	3,783	3,062
Corporate & Institutional Banking | Asset management and brokerage | Operating Segments
Disaggregation of Revenue [Line Items]
Total in-scope noninterest income
Corporate & Institutional Banking | Asset management fees | Operating Segments
Disaggregation of Revenue [Line Items]
Total in-scope noninterest income
Corporate & Institutional Banking | Brokerage fees | Operating Segments
Disaggregation of Revenue [Line Items]
Total in-scope noninterest income
Corporate & Institutional Banking | Card and cash management | Operating Segments
Disaggregation of Revenue [Line Items]
Total in-scope noninterest income	1,350	1,159	897
Corporate & Institutional Banking | Treasury management fees | Operating Segments
Disaggregation of Revenue [Line Items]
Total in-scope noninterest income	1,284	1,097	863
Corporate & Institutional Banking | Debit card fees | Operating Segments
Disaggregation of Revenue [Line Items]
Total in-scope noninterest income
Corporate & Institutional Banking | Net credit card fees | Operating Segments
Disaggregation of Revenue [Line Items]
Total in-scope noninterest income
Corporate & Institutional Banking | Merchant services | Operating Segments
Disaggregation of Revenue [Line Items]
Total in-scope noninterest income	66	62	34
Corporate & Institutional Banking | Other | Operating Segments
Disaggregation of Revenue [Line Items]
Total in-scope noninterest income
Corporate & Institutional Banking | Lending and deposit services | Operating Segments
Disaggregation of Revenue [Line Items]
Total in-scope noninterest income	33	40	42
Corporate & Institutional Banking | Deposit account fees | Operating Segments
Disaggregation of Revenue [Line Items]
Total in-scope noninterest income
Corporate & Institutional Banking | Other | Operating Segments
Disaggregation of Revenue [Line Items]
Total in-scope noninterest income	33	40	42
Corporate & Institutional Banking | Residential and commerical mortgage | Operating Segments
Disaggregation of Revenue [Line Items]
Total in-scope noninterest income	140	141	111
Corporate & Institutional Banking | Capital markets and advisory | Operating Segments
Disaggregation of Revenue [Line Items]
Total in-scope noninterest income	790	1,110	759
Corporate & Institutional Banking | Other | Operating Segments
Disaggregation of Revenue [Line Items]
Total in-scope noninterest income	59	50	41
Asset Management Group | Operating Segments
Disaggregation of Revenue [Line Items]
Total in-scope noninterest income	916	973	836
Out-of-scope noninterest income	20	14	18
Noninterest income	936	987	854
Asset Management Group | Asset management and brokerage | Operating Segments
Disaggregation of Revenue [Line Items]
Total in-scope noninterest income	916	973	836
Asset Management Group | Asset management fees | Operating Segments
Disaggregation of Revenue [Line Items]
Total in-scope noninterest income	908	964	836
Asset Management Group | Brokerage fees | Operating Segments
Disaggregation of Revenue [Line Items]
Total in-scope noninterest income	8	9
Asset Management Group | Card and cash management | Operating Segments
Disaggregation of Revenue [Line Items]
Total in-scope noninterest income
Asset Management Group | Treasury management fees | Operating Segments
Disaggregation of Revenue [Line Items]
Total in-scope noninterest income
Asset Management Group | Debit card fees | Operating Segments
Disaggregation of Revenue [Line Items]
Total in-scope noninterest income
Asset Management Group | Net credit card fees | Operating Segments
Disaggregation of Revenue [Line Items]
Total in-scope noninterest income
Asset Management Group | Merchant services | Operating Segments
Disaggregation of Revenue [Line Items]
Total in-scope noninterest income
Asset Management Group | Other | Operating Segments
Disaggregation of Revenue [Line Items]
Total in-scope noninterest income
Asset Management Group | Lending and deposit services | Operating Segments
Disaggregation of Revenue [Line Items]
Total in-scope noninterest income
Asset Management Group | Deposit account fees | Operating Segments
Disaggregation of Revenue [Line Items]
Total in-scope noninterest income
Asset Management Group | Other | Operating Segments
Disaggregation of Revenue [Line Items]
Total in-scope noninterest income