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Variable Interest Entities - Schedule of Options to Repurchase Delinquent Loans (Details) - Nonconsolidated entities - USD ($)
$ in Millions
Mar. 31, 2024
Dec. 31, 2023
Variable Interest Entity [Line Items]    
Loans repurchased or option to repurchase $ 519 $ 597
Real estate acquired through foreclosure 8 8
Residential mortgage    
Variable Interest Entity [Line Items]    
Real estate acquired through foreclosure $ 15 $ 22