v3.26.1
Debt Securities (Narrative) (Details)
$ in Millions
3 Months Ended
Mar. 31, 2026
USD ($)
securities
Mar. 31, 2025
USD ($)
Dec. 31, 2025
USD ($)
securities
Marketable Securities [Line Items]      
Gross realized gains or losses from sales of AFS debt securities $ 0 $ 0  
Number of debt securities in an unrealized loss position | securities 811   592
Financial instruments owned at amortized cost $ 6,600   $ 6,800
Total loans pledged to secure borrowings 6,200   6,500
Debt Securities      
Marketable Securities [Line Items]      
Interest Receivable $ 43   $ 46