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Contingencies - Narrative (Details)
$ in Millions
Apr. 20, 2017
States
Mar. 31, 2022
USD ($)
Loan
Mar. 31, 2021
USD ($)
Loan
Loss Contingencies [Line Items]      
Accrued penalty   $ 46.0  
Number of states charging with regulatory action | States 29    
Warranty repurchase demands unpaid principal balance   $ 49.8 $ 53.6
Warranty repurchase demands number of loans | Loan   270 275