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CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME - USD ($)
$ in Millions
3 Months Ended
Mar. 31, 2026
Mar. 31, 2025
Statement of Comprehensive Income [Abstract]    
Net income (loss) $ 150 $ 140
Unamortized holding gains on securities transferred to held to maturity, net of tax    
Reclassification adjustment for accretion of unrealized holding gains on HTM securities, net of tax (1) (1)
Net change (1) (1)
Unrealized gains (losses) on securities available for sale, net of tax    
Change in net unrealized gains (losses) on AFS securities arising during the period, net of tax (98) (15)
Reclassification adjustment for realized (gains) losses on sale of AFS securities included in net income, net of tax (2) 9
Net change (100) (5)
Unrealized gains (losses) on derivative instruments designated as cash flow hedges, net of tax    
Change in net unrealized gains (losses) on cash flow hedges arising during the period, net of tax (1) 9
Net change (1) 9
Total other comprehensive income (102) 2
Comprehensive income $ 48 $ 142