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Fee-Based Revenue from Contracts with Customers - Corporate & Institutional Banking Noninterest Income Disaggregation (Details) - USD ($) $ in Millions | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2021 | Sep. 30, 2020 | Sep. 30, 2021 | Sep. 30, 2020
Disaggregation of Revenue [Line Items] |  |  |  |
Noninterest income | $ 2,341 | $ 1,797 | $ 6,299 | $ 5,171
Corporate & Institutional Banking |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Noninterest income | 1,056 | 723 | 2,730 | 2,143
Corporate & Institutional Banking | In-Scope |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Noninterest income | 730 | 412 | 1,781 | 1,295
Corporate & Institutional Banking | Out-of-Scope |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Noninterest income | 326 | 311 | 949 | 848
Corporate & Institutional Banking | Treasury management fees | In-Scope |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Noninterest income | 323 | 231 | 837 | 665
Corporate & Institutional Banking | Capital markets fees | In-Scope |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Noninterest income | 354 | 132 | 778 | 494
Corporate & Institutional Banking | Commercial mortgage banking activities | In-Scope |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Noninterest income | 36 | 31 | 102 | 81
Corporate & Institutional Banking | Other | In-Scope |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Noninterest income | $ 17 | $ 18 | $ 64 | $ 55

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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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