Quarterly report [Sections 13 or 15(d)]

SHAREOWNERS' EQUITY - Gains (Losses) Reclassified from AOCI (Details)

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SHAREOWNERS' EQUITY - Gains (Losses) Reclassified from AOCI (Details) - USD ($)
$ in Millions
 3 Months Ended
Mar. 31, 2026
Mar. 31, 2025
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]    
Interest expense $ (266) $ (222)
Revenue 21,202 21,546
Income tax (expense) benefit (260) (336)
Net Income 864 1,187
Investment income and other 123 79
Reclassification out of Accumulated Other Comprehensive Income    
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]    
Net Income (47) 13
Unrealized gain (loss) on cash flow hedges | Reclassification out of Accumulated Other Comprehensive Income    
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]    
Interest expense (1) (1)
Revenue (24) 57
Income tax (expense) benefit 6 (13)
Net Income (19) 43
Unrecognized pension and postretirement benefit costs | Reclassification out of Accumulated Other Comprehensive Income    
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]    
Income tax (expense) benefit 9 9
Net Income (28) (30)
Prior service costs | Reclassification out of Accumulated Other Comprehensive Income    
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]    
Investment income and other $ (37) $ (39)