v3.26.1
OTHER COMPREHENSIVE INCOME - Activity/Roll Forward (Details) - USD ($)
$ in Millions
 3 Months Ended
Mar. 31, 2026
Mar. 31, 2025
After-tax    
Unrealized gains (losses) on available-for-sale securities arising during the period, net of hedges $ (137) $ 409
Reclassification from Accumulated Other Comprehensive Income, Current Period, Net of Tax (14) 24
Other comprehensive income (loss), net of tax (151) 433
AOCI    
Pretax    
Other comprehensive income (loss), pretax (198) 562
Tax (expense) benefit    
Total other comprehensive income (loss), tax (expense) benefit 47 (129)
After-tax    
Other comprehensive income (loss), net of tax (151) 433
Unrealized gains and (losses) on debt securities    
Pretax    
Other comprehensive income (loss) before reclassifications (74) 329
Reclassification adjustment for cash flow hedges included in net income (25) 2
Tax (expense) benefit    
OCI before reclassification, tax (expense) benefit 17 (76)
Reclassification from AOCI, Current Period, Tax 6 0
After-tax    
Unrealized gains (losses) on available-for-sale securities arising during the period, net of hedges (57) 253
Reclassification from Accumulated Other Comprehensive Income, Current Period, Net of Tax (19) 2
Other comprehensive income (loss), net of tax (76) 255
Net change related to cash flow hedges on loans    
Pretax    
Other comprehensive income (loss) before reclassifications (106) 202
Reclassification adjustment for cash flow hedges included in net income 6 28
Tax (expense) benefit    
OCI before reclassification, tax (expense) benefit 25 (47)
Reclassification from AOCI, Current Period, Tax (1) (6)
After-tax    
Unrealized gains (losses) on available-for-sale securities arising during the period, net of hedges (81) 155
Reclassification from Accumulated Other Comprehensive Income, Current Period, Net of Tax 5 22
Other comprehensive income (loss), net of tax (76) 177
Net change related to cash flow hedges on loans | Cash Flow Hedges    
Pretax    
Other comprehensive income (loss), pretax (100) 230
Tax (expense) benefit    
Total other comprehensive income (loss), tax (expense) benefit 24 (53)
After-tax    
Other comprehensive income (loss), net of tax (76) 177
Translation adjustments, net of hedges    
Pretax    
Other comprehensive income (loss), pretax (1) 1
Tax (expense) benefit    
Total other comprehensive income (loss), tax (expense) benefit 1 0
After-tax    
Unrealized gains (losses) on available-for-sale securities arising during the period, net of hedges 0 1
Reclassification from Accumulated Other Comprehensive Income, Current Period, Net of Tax 0 0
Other comprehensive income (loss), net of tax 0 1
Unrealized losses for pension and other post-retirement obligations    
Pretax    
Other comprehensive income (loss) before reclassifications 2  
Tax (expense) benefit    
OCI before reclassification, tax (expense) benefit (1)  
After-tax    
Unrealized gains (losses) on available-for-sale securities arising during the period, net of hedges 1 0
Reclassification from Accumulated Other Comprehensive Income, Current Period, Net of Tax 0 0
Other comprehensive income (loss), net of tax 1 0
Debt securities | Unrealized gains and (losses) on debt securities    
Pretax    
Other comprehensive income (loss), pretax (99) 331
Tax (expense) benefit    
Total other comprehensive income (loss), tax (expense) benefit 23 (76)
After-tax    
Other comprehensive income (loss), net of tax $ (76) $ 255