v3.26.1
Debt - Schedule of Long-term Debt (Details) - USD ($)
$ in Millions
Jun. 30, 2026
Dec. 31, 2025
Debt Instrument [Line Items]    
Long-term debt, due within one year $ 3,144 $ 2,659
Long-term debt, due after one year 13,909 14,411
Total long-term debt 17,053 17,070
Unsecured    
Debt Instrument [Line Items]    
Long-term debt, due within one year 771 0
Long-term debt, due after one year 9,033 10,012
Total long-term debt 9,804 10,012
Secured debt    
Debt Instrument [Line Items]    
Long-term debt, due within one year 2,373 2,659
Long-term debt, due after one year 4,876 4,399
Total long-term debt 7,249 7,058
Federal Home Loan Bank Advances | Federal Home Loan Bank of Pittsburgh    
Debt Instrument [Line Items]    
Total long-term debt $ 4,000 $ 4,200