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Derivatives - Narrative (Details) - USD ($) $ in Millions | 1 Months Ended | 12 Months Ended |
--- | --- | --- | ---
Nov. 30, 2020 | Dec. 31, 2021 | Dec. 31, 2020 | Dec. 31, 2019 | Oct. 31, 2020
Derivative Instruments, Gain (Loss) [Line Items] |  |  |  |  |
Collateral cash payables |  | $ 184 | $ 347 |  |
Total trading revenues |  | 360 | 371 | $ 228 |
Term borrowings |  | 1,590 | 1,670 |  |
Hedged amount of foreign currency denominated loans |  | 7 | 12 |  |
Derivative asset |  | 323 | 765 |  |
Derivative liabilities, other |  | 103 | 125 |  |
Visa Class B Shares |  |  |  |  |
Derivative Instruments, Gain (Loss) [Line Items] |  |  |  |  |
Derivative liabilities related to sale |  | 23 | 13 |  |
Derivative valuation adjustment |  | 19 |  |  |
Additional Derivative Agreements | Derivative Instruments With Adjustable Collateral Posting Thresholds |  |  |  |  |
Derivative Instruments, Gain (Loss) [Line Items] |  |  |  |  |
Net fair value of derivative assets with adjustable posting thresholds |  | 67 | 200 |  |
Net fair value of derivative liabilities with adjustable posting thresholds |  | 26 | 5 |  |
Collateral received |  | 205 | 320 |  |
Securities posted collateral |  | 14 | 34 |  |
Additional Derivative Agreements | Derivative Instruments With Accelerated Termination Provisions |  |  |  |  |
Derivative Instruments, Gain (Loss) [Line Items] |  |  |  |  |
Net fair value of derivative assets with adjustable posting thresholds |  | 74 | 216 |  |
Net fair value of derivative liabilities with adjustable posting thresholds |  | 30 | 17 |  |
Collateral received |  | 213 | 343 |  |
Securities posted collateral |  | 18 | 53 |  |
Interest Rate Contract |  |  |  |  |
Derivative Instruments, Gain (Loss) [Line Items] |  |  |  |  |
Collateral cash payables |  | 181 | 327 |  |
Derivative asset |  | 311 | 702 |  |
Derivative liabilities, other |  | 93 | 60 |  |
Credit Risk Contract |  |  |  |  |
Derivative Instruments, Gain (Loss) [Line Items] |  |  |  |  |
Derivative asset, notional amount |  | 257 | 233 |  |
Derivative liability, notional amount |  | 500 | 464 |  |
Embedded Derivative Financial Instruments |  |  |  |  |
Derivative Instruments, Gain (Loss) [Line Items] |  |  |  |  |
Derivative asset |  | 1 | 1 |  |
Derivative liabilities, other |  | 1 | 1 |  |
Counterparties |  |  |  |  |
Derivative Instruments, Gain (Loss) [Line Items] |  |  |  |  |
Collateral cash receivables |  | 181 | 280 |  |
Collateral cash payables |  | $ 102 | $ 166 |  |
Senior Subordinated Notes | Senior Debt Maturing In December 2020 | Long Term Debt Hedged With Fair Value Interest Rate Derivatives Using Long Haul Method |  |  |  |  |
Derivative Instruments, Gain (Loss) [Line Items] |  |  |  |  |
Term borrowings |  |  |  |  | $ 500
Debt redeemed | $ 500 |  |  |  |

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