v3.26.1
Mortgage Servicing Assets - OMSR (Details) - Originated Mortgage Servicing Rights
$ in Millions
3 Months Ended
Mar. 31, 2026
USD ($)
Sensitivity Analysis of Fair Value of Interests Continued to be Held by Transferor, Servicing Assets or Liabilities, Impact of Adverse Change in Assumption [Line Items]  
Unpaid principal balance of loans sold during the period $ 1,685
Pretax gains related to the sale of mortgage loans $ 30
Weighted average servicing fee rate 0.17%
Escrow earn rate assumption 4.26%
Discount rate assumption 10.34%
Default rate assumption 1.02%
Prepayment rate assumption 12.26%