v3.26.1
Shareholders' Equity and Other Comprehensive Income (Loss) - Schedule of Changes in Accumulated Other Comprehensive Income (Loss) by Component (Net of Income Taxes) (Details) - USD ($)
$ in Millions
 3 Months Ended 6 Months Ended
Jun. 30, 2026
Jun. 30, 2025
Jun. 30, 2026
Jun. 30, 2025
AOCI Attributable to Parent, Net of Tax [Roll Forward]        
Beginning balance $ 14,594 $ 6,543 $ 7,044 $ 6,432
Other comprehensive income (loss) before reclassifications (42) (50) (141) (56)
Amounts reclassified from AOCI 20 (2) 17 6
Total other comprehensive income (loss) (22) (52) (124) (50)
Ending balance 14,828 6,637 14,828 6,637
Unrealized losses on investment securities available for sale related to residual tax effects remaining in OCI     5 5
Total        
AOCI Attributable to Parent, Net of Tax [Roll Forward]        
Beginning balance (225) (166) (123) (168)
Total other comprehensive income (loss) (22) (52) (124) (50)
Ending balance (247) (218) (247) (218)
Net unamortized holding (losses) gains on AFS securities transferred to HTM        
AOCI Attributable to Parent, Net of Tax [Roll Forward]        
Beginning balance 11 16 12 18
Other comprehensive income (loss) before reclassifications 0 0 0 0
Amounts reclassified from AOCI (2) (2) (3) (4)
Total other comprehensive income (loss) (2) (2) (3) (4)
Ending balance 9 14 9 14
Net unrealized gains (losses) on securities AFS        
AOCI Attributable to Parent, Net of Tax [Roll Forward]        
Beginning balance (205) (164) (105) (160)
Other comprehensive income (loss) before reclassifications (25) (52) (123) (66)
Amounts reclassified from AOCI 22 0 20 10
Total other comprehensive income (loss) (3) (52) (103) (56)
Ending balance (208) (216) (208) (216)
Net unrealized gains (losses) on cash flow hedges        
AOCI Attributable to Parent, Net of Tax [Roll Forward]        
Beginning balance (31) (18) (30) (26)
Other comprehensive income (loss) before reclassifications (17) 2 (18) 10
Amounts reclassified from AOCI 0 0 0 0
Total other comprehensive income (loss) (17) 2 (18) 10
Ending balance $ (48) $ (16) $ (48) $ (16)