v3.26.1
Regulatory Requirements - Narrative (Details) - USD ($)
$ in Millions
Jun. 30, 2026
Mar. 31, 2026
Dec. 31, 2025
Jun. 30, 2025
Mar. 31, 2025
Dec. 31, 2024
Public Utilities, General Disclosures [Line Items]            
HMBS-related borrowings, at fair value $ (3,610.9) $ (9,437.4) $ (9,611.7) $ (10,253.1) $ (10,587.6) $ (10,872.1)
Restrictive liquidity requirements 65.0          
Cash and cash equivalents 196.6   180.5      
Assets serviced 205,300.0   191,100.0      
Owned MSRs            
Public Utilities, General Disclosures [Line Items]            
Assets serviced $ 174,300.0   $ 152,500.0