v3.26.1
Accumulated Other Comprehensive Loss - Schedule of Changes in Accumulated Other Comprehensive Loss (Details) - USD ($)
$ in Millions
 3 Months Ended 6 Months Ended
Jun. 30, 2026
Jun. 30, 2025
Jun. 30, 2026
Jun. 30, 2025
Increase (Decrease) in Stockholders' Equity [Roll Forward]        
Beginning balance $ 8,120 $ 8,153 $ 8,143 $ 8,167
Other comprehensive income (loss) before reclassification, net of tax (19) 16 (58) 109
Amounts reclassified from AOCL to (income)/expense, net of tax 0 (5) 0 (11)
Total other comprehensive (loss) income, net of tax (19) 11 (58) 98
Ending balance 8,140 8,095 8,140 8,095
Total        
Increase (Decrease) in Stockholders' Equity [Roll Forward]        
Beginning balance (528) (553) (489) (640)
Total other comprehensive (loss) income, net of tax (19) 11 (58) 98
Ending balance (547) (542) (547) (542)
Securities AFS        
Increase (Decrease) in Stockholders' Equity [Roll Forward]        
Beginning balance (506) (560) (467) (653)
Other comprehensive income (loss) before reclassification, net of tax (19) 16 (58) 109
Amounts reclassified from AOCL to (income)/expense, net of tax 0 0 0 0
Total other comprehensive (loss) income, net of tax (19) 16 (58) 109
Ending balance (525) (544) (525) (544)
Cash Flow Hedges        
Increase (Decrease) in Stockholders' Equity [Roll Forward]        
Beginning balance 0 40 0 47
Other comprehensive income (loss) before reclassification, net of tax 0 0 0 0
Amounts reclassified from AOCL to (income)/expense, net of tax 0 (5) 0 (12)
Total other comprehensive (loss) income, net of tax 0 (5) 0 (12)
Ending balance 0 35 0 35
Pension and Post-retirement Plans        
Increase (Decrease) in Stockholders' Equity [Roll Forward]        
Beginning balance (22) (33) (22) (34)
Other comprehensive income (loss) before reclassification, net of tax 0 0 0 0
Amounts reclassified from AOCL to (income)/expense, net of tax 0 0 0 1
Total other comprehensive (loss) income, net of tax 0 0 0 1
Ending balance $ (22) $ (33) $ (22) $ (33)