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Fee-Based Revenue from Contracts with Customers - Corporate & Institutional Banking Noninterest Income Disaggregation (Details) - USD ($) $ in Millions | 3 Months Ended
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Mar. 31, 2021 | Mar. 31, 2020
Disaggregation of Revenue [Line Items] |  |
Noninterest income | $ 1,872 | $ 1,825
Corporate & Institutional Banking |  |
Disaggregation of Revenue [Line Items] |  |
Noninterest income | 807 | 694
Corporate & Institutional Banking | In-Scope |  |
Disaggregation of Revenue [Line Items] |  |
Noninterest income | 487 | 437
Corporate & Institutional Banking | Out-of-Scope |  |
Disaggregation of Revenue [Line Items] |  |
Noninterest income | 320 | 257
Corporate & Institutional Banking | Treasury management fees | In-Scope |  |
Disaggregation of Revenue [Line Items] |  |
Noninterest income | 235 | 216
Corporate & Institutional Banking | Capital markets fees | In-Scope |  |
Disaggregation of Revenue [Line Items] |  |
Noninterest income | 192 | 175
Corporate & Institutional Banking | Commercial mortgage banking activities | In-Scope |  |
Disaggregation of Revenue [Line Items] |  |
Noninterest income | 31 | 26
Corporate & Institutional Banking | Other | In-Scope |  |
Disaggregation of Revenue [Line Items] |  |
Noninterest income | $ 29 | $ 20

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- Definition The total amount of noninterest income which may be derived from: (1) fees and commissions; (2) premiums earned; (3) insurance policy charges; (4) the sale or disposal of assets; and (5) other sources not otherwise specified. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 220 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-04.13) -URI http://asc.fasb.org/extlink&oid=120399700&loc=SL114874048-224260 + Details
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