v3.26.1
Mortgage Servicing Rights and Related Liabilities - Narrative (Details) - USD ($)
$ in Millions
 6 Months Ended
Jun. 30, 2026
Dec. 31, 2025
Debt Securities, Held-to-Maturity, Allowance for Credit Loss [Line Items]    
UPB of mortgage loans serviced $ 1,213,607 $ 1,290,325
Delinquent loans as a percentage of total portfolio (in percent) 1.37% 1.50%
Excess spread financing, at fair value $ 322 $ 337
Excess spread financing UPB, fair value disclosure 56,611 $ 59,695
Mr. Cooper Group Inc    
Debt Securities, Held-to-Maturity, Allowance for Credit Loss [Line Items]    
Unpaid principal balance sold 92,522  
Unpaid principal balance retained $ 62,974