v3.26.3
ACCUMULATED OTHER COMPREHENSIVE INCOME / (LOSS) (Details) - USD ($)
$ in Millions
 3 Months Ended 9 Months Ended
Sep. 30, 2026
Sep. 30, 2025
Sep. 30, 2026
Sep. 30, 2025
Accumulated Other Comprehensive Income (Loss) [Line Items]        
Total other comprehensive income/(loss), pre-tax activity $ (338) $ 83 $ (441) $ 163
Total other comprehensive income/(loss), tax effect (19) (21) 9 (42)
TOTAL OTHER COMPREHENSIVE (LOSS) / INCOME, NET OF TAX (357) 62 (432) 121
AOCI Attributable to Parent, Net of Tax [Roll Forward]        
Beginning Balance 16,500 16,488 15,945 15,676
Net Activity (357) 62 (432) 121
Ending Balance 29,089 16,962 29,089 16,962
Accumulated other comprehensive loss, net of tax        
AOCI Attributable to Parent, Net of Tax [Roll Forward]        
Beginning Balance (608) (659) (533) (718)
Ending Balance (965) (597) (965) (597)
Net unrealized (losses)/gains on cash flow hedge derivative financial instruments        
Accumulated Other Comprehensive Income (Loss) [Line Items]        
Other comprehensive income/(loss), pre-tax activity (126) 31 (228) 128
Other comprehensive income (loss), tax effect (29) (8) (1) (31)
Other comprehensive income/(loss), net activity (155) 23 (229) 97
Reclassification adjustment, pre-tax activity (2) (4) (8) (11)
Reclassification adjustment, tax effect 0 1 2 3
Reclassification adjustment, net activity (2) (3) (6) (8)
Total other comprehensive income/(loss), pre-tax activity (128) 27 (236) 117
Total other comprehensive income/(loss), tax effect (29) (7) 1 (28)
TOTAL OTHER COMPREHENSIVE (LOSS) / INCOME, NET OF TAX (157) 20 (235) 89
AOCI Attributable to Parent, Net of Tax [Roll Forward]        
Beginning Balance (42) (3) 36 (72)
Net Activity (157) 20 (235) 89
Ending Balance (199) 17 (199) 17
Net unrealized gains/(losses) on investments in debt securities (2)        
Accumulated Other Comprehensive Income (Loss) [Line Items]        
Other comprehensive income/(loss), pre-tax activity (357)   (350)  
Other comprehensive income (loss), tax effect 43   41  
Other comprehensive income/(loss), net activity (314)   (309)  
Reclassification adjustment, pre-tax activity 147   145  
Reclassification adjustment, tax effect (33)   (33)  
Reclassification adjustment, net activity 114   112  
Total other comprehensive income/(loss), pre-tax activity (210) 56 (205) 25
Total other comprehensive income/(loss), tax effect 10 (14) 8 (9)
TOTAL OTHER COMPREHENSIVE (LOSS) / INCOME, NET OF TAX (200) 42 (197) 16
AOCI Attributable to Parent, Net of Tax [Roll Forward]        
Beginning Balance (566) (656) (569) (630)
Net Activity (200) 42 (197) 16
Ending Balance $ (766) (614) $ (766) (614)
Other        
Accumulated Other Comprehensive Income (Loss) [Line Items]        
Total other comprehensive income/(loss), pre-tax activity       21
Total other comprehensive income/(loss), tax effect       (5)
TOTAL OTHER COMPREHENSIVE (LOSS) / INCOME, NET OF TAX       16
AOCI Attributable to Parent, Net of Tax [Roll Forward]        
Beginning Balance       (16)
Net Activity       16
Ending Balance   $ 0   $ 0