v3.26.1
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 6 Months Ended
Jun. 30, 2026
Jun. 30, 2025
Jun. 30, 2026
Jun. 30, 2025
Dec. 31, 2025
Derecognized Assets, Securitized or Asset-backed Financing Arrangement Assets and any Other Financial Assets Managed Together [Line Items]          
Total amount $ 4,104   $ 4,104   $ 3,192
Amount 60 days or more past due 193   193   161
Net credit losses 48 $ 24 93 $ 59  
Off-balance-sheet securitization entities | Consumer automotive | Consumer          
Derecognized Assets, Securitized or Asset-backed Financing Arrangement Assets and any Other Financial Assets Managed Together [Line Items]          
Total amount 727   727   1,002
Amount 60 days or more past due 15   15   18
Net credit losses 3 3 7 8  
Whole-loan sales | Consumer automotive | Consumer          
Derecognized Assets, Securitized or Asset-backed Financing Arrangement Assets and any Other Financial Assets Managed Together [Line Items]          
Total amount 3,377   3,377   2,190
Amount 60 days or more past due 178   178   $ 143
Net credit losses 45 21 86 44  
Whole-loan sales | Other | Consumer          
Derecognized Assets, Securitized or Asset-backed Financing Arrangement Assets and any Other Financial Assets Managed Together [Line Items]          
Net credit losses $ 0 $ 0 $ 0 $ 7