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Financial Derivatives (Narrative) (Details) - USD ($) | 12 Months Ended
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Dec. 31, 2024 | Dec. 31, 2023 | Dec. 31, 2022
Derivative [Line Items] |  |  |
Gain (loss) on net investment hedge derivatives | $ 24,000,000 | $ (53,000,000) | $ 119,000,000
Cash and securities held to collateralize net derivative assets | 2,400,000,000 |  |
Cash and securities pledged to collateralize net derivative liabilities | 2,300,000,000 |  |
Net derivative liabilities with credit-risk contingent features | 3,900,000,000 | 4,200,000,000 |
Collateral posted | 1,100,000,000 | 1,000,000,000.0 |
Maximum additional amount of collateral exposure | 2,800,000,000 | 3,200,000,000 |
Cash Flow Hedging | Interest rate contracts |  |  |
Derivative [Line Items] |  |  |
Cash flow hedge gain (loss) to be reclassified within twelve months | 600,000,000 |  |
Cash flow hedge gain (loss) to be reclassified within twelve months, net of tax | $ 500,000,000 |  |
Maximum length of time over which forecasted loan cash flows are hedged | 10 years |  |
Net Investment Hedging | Foreign exchange contracts |  |  |
Derivative [Line Items] |  |  |
Gain (loss) from components excluded from assessment of net investment hedge effectiveness net | $ 0 | $ 0 | $ 0

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- Definition Represents amount of cash, and if applicable, U.S. government securities and/or mortgage-backed securities, held under master netting and other collateral agreements to collateralize net derivative assets due from counterparties. + References No definition available. + Details
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- Definition Represents amount of cash, and if applicable, U.S. government securities and/or mortgage-backed securities, pledged under master netting and other collateral agreements to collateralize net derivative liabilities owed to counterparties. + References No definition available. + Details
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- Definition Cash Flow Hedge Gain (Loss) to be Reclassified within Twelve Months, Net of Tax + References No definition available. + Details
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- Definition Gain Loss From Components Excluded From Assessment Of Net Investment Hedge Effectiveness Net + References No definition available. + Details
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- Definition The aggregate fair value of additional assets that would be required to be posted as collateral for derivative instruments with credit-risk-related contingent features if the credit-risk-related contingent features were triggered at the end of the reporting period. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 4H -Subparagraph (e) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480434/815-10-50-4H + Details
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- Definition The estimated net amount of existing gains or losses on cash flow hedges at the reporting date expected to be reclassified to earnings within the next 12 months. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Topic 815 -SubTopic 30 -Section 50 -Paragraph 1 -Subparagraph (c) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480870/815-30-50-1 + Details
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- Definition The aggregate fair value of assets that are already posted, at the end of the reporting period, as collateral for derivative instruments with credit-risk-related contingent features. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 4H -Subparagraph (d) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480434/815-10-50-4H + Details
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- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 815 -SubTopic 40 -Name Accounting Standards Codification -Section 50 -Paragraph 5 -Subparagraph (f) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480237/815-40-50-5 + Details
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- Definition The aggregate fair value amounts of derivative instruments that contain credit-risk-related contingent features that are in a net liability position at the end of the reporting period. For nonderivative instruments that are designated and qualify as hedging instruments, the fair value amounts are the carrying value of the nonderivative hedging instrument, including the adjustment for the foreign currency transaction gain (loss) on that instrument. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 4H -Subparagraph (c) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480434/815-10-50-4H + Details
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- Definition Maximum length of time over which the entity is hedging its exposure to the variability in future cash flows for forecasted transactions, excluding those forecasted transactions related to the payment of variable interest on existing financial instruments, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Section 50 -Paragraph 1 -Subparagraph (d) -SubTopic 30 -Topic 815 -Publisher FASB -URI https://asc.fasb.org/1943274/2147480870/815-30-50-1 + Details
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- Definition Amount, before tax and reclassification, of gain (loss) from derivative designated and qualifying as net investment hedge. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 815 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 4CCC -Subparagraph (a) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480434/815-10-50-4CCC + Details
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