v3.26.1
Components of Other Comprehensive Income (Loss) - Schedule of Reclassification from AOCI (Details) - USD ($)
$ in Millions
 3 Months Ended 6 Months Ended
Jun. 30, 2026
Mar. 31, 2026
Jun. 30, 2025
Mar. 31, 2025
Jun. 30, 2026
Jun. 30, 2025
Accumulated Other Comprehensive Income (Loss) [Line Items]            
Interest and fees on loans and leases $ (912)   $ (921)   $ (1,797) $ (1,816)
Income tax expense 66   64   142 127
Other expense 60   54   119 114
Total reclassification from AOCI (274) $ (266) (245) $ (222) (541) (467)
Reclassification out of Accumulated Other Comprehensive Income            
Accumulated Other Comprehensive Income (Loss) [Line Items]            
Total reclassification from AOCI 8   11   17 22
Reclassification out of Accumulated Other Comprehensive Income | Cash Flow Hedges            
Accumulated Other Comprehensive Income (Loss) [Line Items]            
Interest and fees on loans and leases 8   12   17 24
Income tax expense (2)   (3)   (4) (6)
Total reclassification from AOCI 6   9   13 18
Reclassification out of Accumulated Other Comprehensive Income | Pension and Postretirement Plans            
Accumulated Other Comprehensive Income (Loss) [Line Items]            
Income tax expense 0   (1)   (1) (2)
Other expense 2   3   5 6
Total reclassification from AOCI $ 2   $ 2   $ 4 $ 4