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Commitments and Contingencies - Narrative (Details) - USD ($)
$ in Millions
Sep. 30, 2023
Dec. 31, 2022
Loss Contingencies [Line Items]    
Valuation allowances and reserves, balance $ 4.2 $ 6.0
Residential Mortgage    
Loss Contingencies [Line Items]    
Valuation allowances and reserves, balance $ 1.8 $ 1.4