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Derivatives and Hedging Activities (Details Textual) - USD ($) $ in Millions | 3 Months Ended | 9 Months Ended |
--- | --- | --- | ---
Sep. 30, 2024 | Sep. 30, 2023 | Sep. 30, 2024 | Sep. 30, 2023 | Dec. 31, 2023
Derivatives, Fair Value [Line Items] |  |  |  |  |
Margin on interest rate swaps | $ 405 |  | $ 405 |  | $ 175
Carrying values of hedged liabilities | 20,000 |  | 20,000 |  | 11,700
Cumulative amount of fair value hedging adjustment | 534 |  | 534 |  | 53
Net increase in interest expense on long term debt and other | 82 | $ 47 | 214 | $ 130 |
Credit Valuation Adjustment |  |  |  |  |
Derivatives, Fair Value [Line Items] |  |  |  |  |
Derivative, amount of hedged item | 0 |  | 0 |  | 0
Fair Value Hedges | Fixed-Rate Debt Obligations |  |  |  |  |
Derivatives, Fair Value [Line Items] |  |  |  |  |
Derivative, amount of hedged item | 19,600 |  | 19,600 |  | 11,700
Net Investment Hedges |  |  |  |  |
Derivatives, Fair Value [Line Items] |  |  |  |  |
Notional amount of derivatives | 14,500 |  | 14,500 |  | 14,100
Gains (losses) on net investment hedges, net of taxes | (96) | 244 | 187 | (261) |
Reclassifications out of AOCI |  |  | 0 | 0 |
Foreign Exchange Contract | Not Designated as Hedging Instrument |  |  |  |  |
Derivatives, Fair Value [Line Items] |  |  |  |  |
Notional amount of derivatives | 28,400 |  | 28,400 |  | 25,300
Foreign Exchange Contract | Not Designated as Hedging Instrument | Other Expense |  |  |  |  |
Derivatives, Fair Value [Line Items] |  |  |  |  |
Gains in changes in fair value of derivatives not designated as hedges | 24 | 26 | 67 | 56 |
Embedded Derivative | Not Designated as Hedging Instrument |  |  |  |  |
Derivatives, Fair Value [Line Items] |  |  |  |  |
Notional amount of derivatives | 78 |  | 78 |  | $ 78
Embedded Derivative | Not Designated as Hedging Instrument | Noninterest Income |  |  |  |  |
Derivatives, Fair Value [Line Items] |  |  |  |  |
Gains (losses) on embedded derivative | $ 5 | $ (12) | $ 4 | $ (12) |

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- Definition Amount posted as initial margin for centrally cleared interest rate swaps which is not netted against the derivative balances. + References No definition available. + Details
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- Definition Nominal or face amount used to calculate payment on derivative. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 815 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 1B -Publisher FASB -URI https://asc.fasb.org/1943274/2147480434/815-10-50-1B Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 815 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 1A -Subparagraph (d) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480434/815-10-50-1A + Details
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