v3.26.1
LONG-TERM DEBT AND SHAREHOLDERS' EQUITY (Changes In Accumulated Other Comprehensive Income (Loss)) (Details) - USD ($)
$ in Millions
 3 Months Ended
Mar. 31, 2026
Mar. 31, 2025
AOCI Attributable to Parent, Net of Tax [Roll Forward]    
Balance at beginning of period $ 7,180 $ 6,124
Other comprehensive income before reclassifications, net of tax (43) 73
Amounts reclassified from AOCI, net of tax 49 57
Other comprehensive income, net of tax 6 130
Balance at end of period 7,296 6,327
Income tax expense included in other comprehensive income 2 42
Total    
AOCI Attributable to Parent, Net of Tax [Roll Forward]    
Balance at beginning of period (1,941) (2,380)
Balance at end of period (1,935) (2,250)
Net unrealized gains (losses) on investment securities    
AOCI Attributable to Parent, Net of Tax [Roll Forward]    
Balance at beginning of period (1,917) (2,301)
Other comprehensive income before reclassifications, net of tax (21) 68
Amounts reclassified from AOCI, net of tax 40 43
Other comprehensive income, net of tax 19 111
Balance at end of period (1,898) (2,190)
Income tax expense included in other comprehensive income 6 36
Net unrealized gains (losses) on derivatives and other    
AOCI Attributable to Parent, Net of Tax [Roll Forward]    
Balance at beginning of period (23) (78)
Other comprehensive income before reclassifications, net of tax (22) 5
Amounts reclassified from AOCI, net of tax 9 14
Other comprehensive income, net of tax (13) 19
Balance at end of period (36) (59)
Income tax expense included in other comprehensive income (4) 6
Pension and post-retirement    
AOCI Attributable to Parent, Net of Tax [Roll Forward]    
Balance at beginning of period (1) (1)
Other comprehensive income before reclassifications, net of tax 0 0
Amounts reclassified from AOCI, net of tax 0 0
Other comprehensive income, net of tax 0 0
Balance at end of period (1) (1)
Income tax expense included in other comprehensive income $ 0 $ 0