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Derivative Financial Instruments - Net Gains (Losses) Recorded in the Condensed Consolidated Statements of Income Relating to Free-Standing Derivative Instruments Used for Risk Management and Other Business Purposes (Details) - USD ($) $ in Millions | 3 Months Ended
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Mar. 31, 2025 | Mar. 31, 2024
Interest rate contracts | Mortgage banking net revenue | MSR portfolio |  |
Derivative Instruments, Gain (Loss) |  |
Net gains (losses) recorded in earnings | $ 19 | $ (46)
Forward contracts related to residential mortgage loans measured at fair value | Mortgage banking net revenue |  |
Derivative Instruments, Gain (Loss) |  |
Net gains (losses) recorded in earnings | (9) | 5
Foreign exchange contracts | Other noninterest income |  |
Derivative Instruments, Gain (Loss) |  |
Net gains (losses) recorded in earnings | 0 | 5
Equity contracts | Other noninterest income | Swap |  |
Derivative Instruments, Gain (Loss) |  |
Net gains (losses) recorded in earnings | $ (18) | $ (17)

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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 10 -Name Accounting Standards Codification -Section 50 -Paragraph 4E -Publisher FASB -URI https://asc.fasb.org/1943274/2147480434/815-10-50-4E + Details
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- Definition Amount of realized and unrealized gain (loss) of derivative instruments not designated or qualifying as hedging instruments. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 4C -Subparagraph (e) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480434/815-10-50-4C Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef -Name Accounting Standards Codification -Section 50 -Paragraph 4CC -SubTopic 10 -Topic 815 -Publisher FASB -URI https://asc.fasb.org/1943274/2147480434/815-10-50-4CC + Details
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