v3.26.1
DERIVATIVES - Fair Value Hedges (Details) - USD ($)
$ in Millions
 3 Months Ended 6 Months Ended
Jun. 30, 2026
Jun. 30, 2025
Jun. 30, 2026
Jun. 30, 2025
Gain (loss) on fair value hedges        
Gain (loss) under mark-to-market approach $ 71 $ 139    
Gain (loss) under amortization approach (1) 15    
Excluded component of fair value hedges | Excluded component of fair value hedges        
Gain (loss) on fair value hedges        
Other comprehensive income (loss), pretax 2 (2) $ 21 $ 8
Income Statement Location [Axis]: us-gaap:InterestIncomeExpenseNet        
Gain (loss) on fair value hedges        
Gain (loss) on the hedging derivatives included in assessment of the effectiveness of fair value hedges (360) (9) (961) (423)
Gain (loss) on the hedged item in designated and qualifying fair value hedges 362 9 965 428
Net gain (loss) on the hedging derivatives excluded from assessment of the effectiveness of fair value hedges 0 0 0 0
Income Statement Location [Axis]: us-gaap:OtherIncome        
Gain (loss) on fair value hedges        
Gain (loss) on the hedging derivatives included in assessment of the effectiveness of fair value hedges (405) (188) 111 (453)
Gain (loss) on the hedged item in designated and qualifying fair value hedges 405 188 (111) 453
Net gain (loss) on the hedging derivatives excluded from assessment of the effectiveness of fair value hedges 161 248 235 477
Interest rate contracts (gross) | Income Statement Location [Axis]: us-gaap:InterestIncomeExpenseNet        
Gain (loss) on fair value hedges        
Gain (loss) on the hedging derivatives included in assessment of the effectiveness of fair value hedges (360) (9) (961) (423)
Gain (loss) on the hedged item in designated and qualifying fair value hedges 362 9 965 428
Net gain (loss) on the hedging derivatives excluded from assessment of the effectiveness of fair value hedges 0 0 0 0
Interest rate contracts (gross) | Income Statement Location [Axis]: us-gaap:OtherIncome        
Gain (loss) on fair value hedges        
Gain (loss) on the hedging derivatives included in assessment of the effectiveness of fair value hedges 0 0 0 0
Gain (loss) on the hedged item in designated and qualifying fair value hedges 0 0 0 0
Net gain (loss) on the hedging derivatives excluded from assessment of the effectiveness of fair value hedges 0 0 0 0
Foreign exchange contracts (gross) | Income Statement Location [Axis]: us-gaap:InterestIncomeExpenseNet        
Gain (loss) on fair value hedges        
Gain (loss) on the hedging derivatives included in assessment of the effectiveness of fair value hedges 0 0 0 0
Gain (loss) on the hedged item in designated and qualifying fair value hedges 0 0 0 0
Net gain (loss) on the hedging derivatives excluded from assessment of the effectiveness of fair value hedges 0 0 0 0
Foreign exchange contracts (gross) | Income Statement Location [Axis]: us-gaap:OtherIncome        
Gain (loss) on fair value hedges        
Gain (loss) on the hedging derivatives included in assessment of the effectiveness of fair value hedges 158 308 31 317
Gain (loss) on the hedged item in designated and qualifying fair value hedges (158) (308) (31) (317)
Net gain (loss) on the hedging derivatives excluded from assessment of the effectiveness of fair value hedges 90 94 80 121
Commodity hedges | Income Statement Location [Axis]: us-gaap:InterestIncomeExpenseNet        
Gain (loss) on fair value hedges        
Gain (loss) on the hedging derivatives included in assessment of the effectiveness of fair value hedges 0 0 0 0
Gain (loss) on the hedged item in designated and qualifying fair value hedges 0 0 0 0
Net gain (loss) on the hedging derivatives excluded from assessment of the effectiveness of fair value hedges 0 0 0 0
Commodity hedges | Income Statement Location [Axis]: us-gaap:OtherIncome        
Gain (loss) on fair value hedges        
Gain (loss) on the hedging derivatives included in assessment of the effectiveness of fair value hedges (563) (496) 80 (770)
Gain (loss) on the hedged item in designated and qualifying fair value hedges 563 496 (80) 770
Net gain (loss) on the hedging derivatives excluded from assessment of the effectiveness of fair value hedges $ 71 $ 154 $ 155 $ 356