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Variable Interest Entities Affordable Housing Tax Credit Investments (Details) - Variable Interest Entity, Not Primary Beneficiary [Member] - Tax Credit Investments [Member] - USD ($) $ in Millions | 3 Months Ended |
--- | --- | ---
Mar. 31, 2024 | Mar. 31, 2023 | Dec. 31, 2023
Variable Interest Entity [Line Items] |  |  |
Tax credit investments included in other assets | $ 1,453 |  | $ 1,415
Unfunded tax credit commitments included in other liabilities | 558 |  | 592
Loans and letters of credit commitments | 719 |  | 730
Funded portion of loans and letters of credit commitments | 414 |  | $ 395
Tax credits and other tax benefits recognized | 55 | $ 51 |
Tax credit amortization expense included in provision for income taxes | $ 46 | $ 41 |

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- Definition Amount of affordable housing tax credits and other tax benefits recognized. + References Reference 1: http://www.xbrl.org/2003/role/recommendedDisclosureRef -Topic 323 -SubTopic 740 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (a) -Publisher FASB -URI https://asc.fasb.org//1943274/2147481543/323-740-50-2 + Details
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- Definition Amount of investment in qualified affordable housing projects. + References Reference 1: http://www.xbrl.org/2003/role/recommendedDisclosureRef -Topic 323 -SubTopic 740 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (b) -Publisher FASB -URI https://asc.fasb.org//1943274/2147481543/323-740-50-2 + Details
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