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Mortgage Servicing - Narrative (Details) - USD ($)
$ in Millions
3 Months Ended
Mar. 31, 2023
Mar. 31, 2022
Dec. 31, 2022
Transfers and Servicing [Abstract]      
UPB of loans acquired $ 2,000.0 $ 4,100.0  
UPB of MSRs sold 15.8 11,100.0  
Float balances $ 1,900.0 $ 2,100.0 $ 1,500.0