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		9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021
Disaggregation of Revenue [Line Items]
Noninterest income	$ 2,074	$ 2,341	$ 6,027	$ 6,299
Total in-scope noninterest income
Disaggregation of Revenue [Line Items]
Noninterest income	1,390	1,606	4,243	4,170
Out-of-Scope
Disaggregation of Revenue [Line Items]
Noninterest income	453	368	1,347	1,311
Other
Disaggregation of Revenue [Line Items]
Noninterest income	317	268	705	907
Retail Banking
Disaggregation of Revenue [Line Items]
Noninterest income	725	662	2,218	2,022
Retail Banking | Asset management and brokerage
Disaggregation of Revenue [Line Items]
Noninterest income	131	123	400	334
Retail Banking | Card and cash management
Disaggregation of Revenue [Line Items]
Noninterest income	317	328	935	888
Retail Banking | Lending and deposit services
Disaggregation of Revenue [Line Items]
Noninterest income	162	173	483	448
Retail Banking | Total in-scope noninterest income
Disaggregation of Revenue [Line Items]
Noninterest income	610	624	1,818	1,670
Retail Banking | Out-of-Scope
Disaggregation of Revenue [Line Items]
Noninterest income	115	38	400	352
Retail Banking | Brokerage fees | Asset management and brokerage
Disaggregation of Revenue [Line Items]
Noninterest income	131	123	400	334
Retail Banking | Treasury management fees | Card and cash management
Disaggregation of Revenue [Line Items]
Noninterest income	11	15	30	33
Retail Banking | Debit card fees | Card and cash management
Disaggregation of Revenue [Line Items]
Noninterest income	175	184	513	486
Retail Banking | Net credit card fees | Card and cash management
Disaggregation of Revenue [Line Items]
Noninterest income	60	53	178	157
Retail Banking | Merchant services | Card and cash management
Disaggregation of Revenue [Line Items]
Noninterest income	48	46	141	125
Retail Banking | Other | Card and cash management
Disaggregation of Revenue [Line Items]
Noninterest income	23	30	73	87
Retail Banking | Deposit account fees | Lending and deposit services
Disaggregation of Revenue [Line Items]
Noninterest income	146	158	433	406
Retail Banking | Other | Lending and deposit services
Disaggregation of Revenue [Line Items]
Noninterest income	16	15	50	42
Retail Banking | Net credit card fees | In-Scope
Disaggregation of Revenue [Line Items]
Interchange fees	169	155	489	421
Credit card reward costs	109	102	311	264
Corporate & Institutional Banking
Disaggregation of Revenue [Line Items]
Noninterest income	887	1,056	2,659	2,730
Corporate & Institutional Banking | Card and cash management
Disaggregation of Revenue [Line Items]
Noninterest income	344	323	1,004	837
Corporate & Institutional Banking | Lending and deposit services
Disaggregation of Revenue [Line Items]
Noninterest income	8	8	25	28
Corporate & Institutional Banking | Total in-scope noninterest income
Disaggregation of Revenue [Line Items]
Noninterest income	554	730	1,726	1,781
Corporate & Institutional Banking | Out-of-Scope
Disaggregation of Revenue [Line Items]
Noninterest income	333	326	933	949
Corporate & Institutional Banking | Treasury management fees | Card and cash management
Disaggregation of Revenue [Line Items]
Noninterest income	328	306	957	793
Corporate & Institutional Banking | Merchant services | Card and cash management
Disaggregation of Revenue [Line Items]
Noninterest income	16	17	47	44
Corporate & Institutional Banking | Other | Lending and deposit services
Disaggregation of Revenue [Line Items]
Noninterest income	8	8	25	28
Corporate & Institutional Banking | Residential and commercial mortgage
Disaggregation of Revenue [Line Items]
Noninterest income	36	36	100	102
Corporate & Institutional Banking | Capital markets related
Disaggregation of Revenue [Line Items]
Noninterest income	155	354	564	778
Corporate & Institutional Banking | Other
Disaggregation of Revenue [Line Items]
Noninterest income	11	9	33	36
Asset Management Group
Disaggregation of Revenue [Line Items]
Noninterest income	231	256	713	729
Asset Management Group | Asset management and brokerage
Disaggregation of Revenue [Line Items]
Noninterest income	226	252	699	719
Asset Management Group | Total in-scope noninterest income
Disaggregation of Revenue [Line Items]
Noninterest income	226	252	699	719
Asset Management Group | Out-of-Scope
Disaggregation of Revenue [Line Items]
Noninterest income	5	4	14	10
Asset Management Group | Asset management fees | Asset management and brokerage
Disaggregation of Revenue [Line Items]
Noninterest income	224	248	693	713
Asset Management Group | Brokerage fees | Asset management and brokerage
Disaggregation of Revenue [Line Items]
Noninterest income	2	4	6	6
Other
Disaggregation of Revenue [Line Items]
Noninterest income	$ 231	$ 367	$ 437	$ 818