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Variable Interest Entities - Schedule of Options to Repurchase Delinquent Loans (Details) - Nonconsolidated entities - USD ($)
$ in Millions
Sep. 30, 2024
Dec. 31, 2023
Variable Interest Entity [Line Items]    
Loans repurchased or option to repurchase $ 715 $ 597
Real estate owned/ foreclosed 7 8
Residential mortgage loans    
Variable Interest Entity [Line Items]    
Real estate owned/ foreclosed $ 7 $ 22