Fee-Based Revenue from Contracts with Customers (Noninterest Income by Business Segment and Reconciliation to Consolidated Noninterest Income) (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2023	Mar. 31, 2022
Disaggregation of Revenue [Line Items]
Noninterest income	$ 2,018	$ 1,888
Total in-scope noninterest income
Disaggregation of Revenue [Line Items]
Noninterest income	1,386	1,333
Out-of-Scope
Disaggregation of Revenue [Line Items]
Noninterest income	473	464
Other
Disaggregation of Revenue [Line Items]
Noninterest income	258	211
Retail Banking
Disaggregation of Revenue [Line Items]
Noninterest income	743	745
Retail Banking | Asset management and brokerage
Disaggregation of Revenue [Line Items]
Noninterest income	130	134
Retail Banking | Card and cash management
Disaggregation of Revenue [Line Items]
Noninterest income	296	289
Retail Banking | Lending and deposit services
Disaggregation of Revenue [Line Items]
Noninterest income	173	159
Retail Banking | Total in-scope noninterest income
Disaggregation of Revenue [Line Items]
Noninterest income	599	582
Retail Banking | Out-of-Scope
Disaggregation of Revenue [Line Items]
Noninterest income	144	163
Retail Banking | Brokerage fees | Asset management and brokerage
Disaggregation of Revenue [Line Items]
Noninterest income	130	134
Retail Banking | Treasury management fees | Card and cash management
Disaggregation of Revenue [Line Items]
Noninterest income	10	9
Retail Banking | Debit card fees | Card and cash management
Disaggregation of Revenue [Line Items]
Noninterest income	165	161
Retail Banking | Net credit card fees | Card and cash management
Disaggregation of Revenue [Line Items]
Noninterest income	58	55
Retail Banking | Merchant services | Card and cash management
Disaggregation of Revenue [Line Items]
Noninterest income	39	41
Retail Banking | Other | Card and cash management
Disaggregation of Revenue [Line Items]
Noninterest income	24	23
Retail Banking | Deposit account fees | Lending and deposit services
Disaggregation of Revenue [Line Items]
Noninterest income	155	142
Retail Banking | Other | Lending and deposit services
Disaggregation of Revenue [Line Items]
Noninterest income	18	17
Retail Banking | Net credit card fees | In-Scope
Disaggregation of Revenue [Line Items]
Interchange fees	160	148
Credit card reward costs	102	93
Corporate & Institutional Banking
Disaggregation of Revenue [Line Items]
Noninterest income	886	804
Corporate & Institutional Banking | Card and cash management
Disaggregation of Revenue [Line Items]
Noninterest income	347	319
Corporate & Institutional Banking | Lending and deposit services
Disaggregation of Revenue [Line Items]
Noninterest income	8	8
Corporate & Institutional Banking | Total in-scope noninterest income
Disaggregation of Revenue [Line Items]
Noninterest income	561	508
Corporate & Institutional Banking | Out-of-Scope
Disaggregation of Revenue [Line Items]
Noninterest income	325	296
Corporate & Institutional Banking | Treasury management fees | Card and cash management
Disaggregation of Revenue [Line Items]
Noninterest income	328	302
Corporate & Institutional Banking | Merchant services | Card and cash management
Disaggregation of Revenue [Line Items]
Noninterest income	19	17
Corporate & Institutional Banking | Other | Lending and deposit services
Disaggregation of Revenue [Line Items]
Noninterest income	8	8
Corporate & Institutional Banking | Residential and commercial mortgage
Disaggregation of Revenue [Line Items]
Noninterest income	42	31
Corporate & Institutional Banking | Capital markets and advisory
Disaggregation of Revenue [Line Items]
Noninterest income	156	137
Corporate & Institutional Banking | Other
Disaggregation of Revenue [Line Items]
Noninterest income	8	13
Asset Management Group
Disaggregation of Revenue [Line Items]
Noninterest income	230	248
Asset Management Group | Asset management and brokerage
Disaggregation of Revenue [Line Items]
Noninterest income	226	243
Asset Management Group | Total in-scope noninterest income
Disaggregation of Revenue [Line Items]
Noninterest income	226	243
Asset Management Group | Out-of-Scope
Disaggregation of Revenue [Line Items]
Noninterest income	4	5
Asset Management Group | Asset management fees | Asset management and brokerage
Disaggregation of Revenue [Line Items]
Noninterest income	224	241
Asset Management Group | Brokerage fees | Asset management and brokerage
Disaggregation of Revenue [Line Items]
Noninterest income	2	2
Other
Disaggregation of Revenue [Line Items]
Noninterest income	$ 159	$ 91