v3.26.3
Debt Securities (Narrative) (Details)
$ in Millions
3 Months Ended 9 Months Ended
Sep. 30, 2026
USD ($)
securities
Sep. 30, 2025
USD ($)
Sep. 30, 2026
USD ($)
securities
Sep. 30, 2025
USD ($)
Dec. 31, 2025
USD ($)
securities
Marketable Securities [Line Items]          
Gross realized gains or losses from sales of AFS debt securities $ 0 $ 0 $ 0 $ 0  
Number of debt securities in an unrealized loss position | securities 1,573   1,573   592
Financial instruments owned at amortized cost $ 6,700   $ 6,700   $ 6,800
Total loans pledged to secure borrowings 6,100   6,100   6,500
Debt Securities          
Marketable Securities [Line Items]          
Interest Receivable $ 46   $ 46   $ 46