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Derivative Instruments and Hedging Activities (Statement of Gains and Losses on Derivative Instruments Reported in Statement of Comprehensive Income) (Details) - Total derivatives not designated as accounting hedges - USD ($) $ in Millions | 3 Months Ended
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Mar. 31, 2024 | Mar. 31, 2023
Derivative Instruments, Gain (Loss) [Line Items] |  |
Total gain (loss) recognized in earnings | $ 6 | $ (3)
Interest rate contracts |  |
Derivative Instruments, Gain (Loss) [Line Items] |  |
Total gain (loss) recognized in earnings | 5 | 5
Foreign exchange contracts |  |
Derivative Instruments, Gain (Loss) [Line Items] |  |
Total gain (loss) recognized in earnings | 1 | 1
Other credit derivatives |  |
Derivative Instruments, Gain (Loss) [Line Items] |  |
Total gain (loss) recognized in earnings | 0 | (5)
Equity contracts |  |
Derivative Instruments, Gain (Loss) [Line Items] |  |
Total gain (loss) recognized in earnings | 0 | (4)
Gain on mortgage and automotive loans, net | Interest rate contracts |  |
Derivative Instruments, Gain (Loss) [Line Items] |  |
Total gain (loss) recognized in earnings | 5 | 5
Other operating expenses | Foreign exchange contracts |  |
Derivative Instruments, Gain (Loss) [Line Items] |  |
Total gain (loss) recognized in earnings | 1 | 1
Other income, net of losses | Other credit derivatives |  |
Derivative Instruments, Gain (Loss) [Line Items] |  |
Total gain (loss) recognized in earnings | 0 | (5)
Other income, net of losses | Equity contracts |  |
Derivative Instruments, Gain (Loss) [Line Items] |  |
Total gain (loss) recognized in earnings | $ 0 | $ (4)

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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 Aggregate net gain (loss) on all derivative instruments recognized in earnings during the period, before tax effects. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 4A -Subparagraph (b) -Publisher FASB -URI https://asc.fasb.org//1943274/2147480434/815-10-50-4A + Details
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