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 6 Months Ended
Jun. 30, 2026
Jun. 30, 2025
Jun. 30, 2026
Jun. 30, 2025
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]        
Revenue $ 22,834 $ 21,221 $ 44,036 $ 42,767
Interest expense (272) (238) (538) (460)
Income tax (expense) benefit (157) (379) (417) (715)
Net Income 604 1,283 1,468 2,470
Investment income and other 103 78 226 157
Reclassification out of Accumulated Other Comprehensive Income        
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]        
Net Income (42) (29) (89) (16)
Unrealized gain (loss) on cash flow hedges | Reclassification out of Accumulated Other Comprehensive Income        
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]        
Revenue (16) 4 (40) 61
Interest expense (2) (2) (3) (3)
Income tax (expense) benefit 4 (1) 10 (14)
Net Income (14) 1 (33) 44
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 10 18 19
Net Income (28) (30) (56) (60)
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) $ (40) $ (74) $ (79)