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Interest Expense (Tables)
12 Months Ended
Dec. 31, 2023
Other Income and Expenses [Abstract]  
Schedule of Components of Interest Expense
Years Ended December 31,
 202320222021
OFC Senior Secured Notes (1)$43.8 $42.1 $31.7 
PHH senior notes
30.8 31.8 31.9 
Mortgage loan financing facilities
77.8 37.8 30.6 
MSR financing facilities70.6 47.0 26.0 
Advance match funded liabilities41.4 19.8 14.2 
SSTL— — 3.0 
Escrow9.3 7.5 6.5 
 $273.6 $186.0 $144.0