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Securitizations and Variable Interest Entities - Schedule of Quantitative Information and Net Credit Losses about Securitized and Other Financial Assets Managed Together (Details) - Off-balance sheet variable interest entities - USD ($) $ in Millions | 3 Months Ended |
--- | --- | ---
Mar. 31, 2025 | Mar. 31, 2024 | Dec. 31, 2024
Derecognized Assets, Securitized or Asset-backed Financing Arrangement Assets and any Other Financial Assets Managed Together [Line Items] |  |  |
Total amount | $ 2,867 |  | $ 2,971
Amount 60 days or more past due | 107 |  | 115
Net credit losses | 35 | $ 32 |
Off-balance-sheet securitization entities | Automotive | Consumer |  |  |
Derecognized Assets, Securitized or Asset-backed Financing Arrangement Assets and any Other Financial Assets Managed Together [Line Items] |  |  |
Total amount | 1,525 |  | 1,730
Amount 60 days or more past due | 20 |  | 22
Net credit losses | 5 | 4 |
Whole-loan sales | Automotive | Consumer |  |  |
Derecognized Assets, Securitized or Asset-backed Financing Arrangement Assets and any Other Financial Assets Managed Together [Line Items] |  |  |
Total amount | 1,265 |  | 1,155
Amount 60 days or more past due | 78 |  | 83
Net credit losses | 23 | 16 |
Whole-loan sales | Consumer other | Consumer |  |  |
Derecognized Assets, Securitized or Asset-backed Financing Arrangement Assets and any Other Financial Assets Managed Together [Line Items] |  |  |
Total amount | 77 |  | 86
Amount 60 days or more past due | 9 |  | $ 10
Net credit losses | $ 7 | $ 12 |

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- Definition Amount of credit loss after recoveries for transferred financial assets that continue to be recognized in the statement of financial position. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Section 50 -Paragraph 4 -Subparagraph (e)(5) -SubTopic 20 -Topic 860 -Publisher FASB -URI https://asc.fasb.org/1943274/2147481326/860-20-50-4 + Details
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- Definition This is the sum of principal amount outstanding for both securitized and unsecuritized loans of all types. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Section 50 -Subparagraph (a) -Paragraph 4 -SubTopic 20 -Topic 860 -Publisher FASB -URI https://asc.fasb.org/1943274/2147481326/860-20-50-4 + Details
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