Quarterly report [Sections 13 or 15(d)]

SHAREOWNERS' EQUITY - Activity in Accumulated Other Comprehensive Income (Loss) (Details)

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SHAREOWNERS' EQUITY - Activity in 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) [Roll Forward]        
Balance at beginning of period     $ 16,255  
Balance at end of period $ 15,026   15,026  
Accumulated other comprehensive income (loss)        
Accumulated Other Comprehensive Income (Loss) [Roll Forward]        
Balance at end of period (4,198) $ (4,117) (4,198) $ (4,117)
Unrealized gain (loss) on foreign currency translation        
Accumulated Other Comprehensive Income (Loss) [Roll Forward]        
Balance at beginning of period (1,284) (1,085) (1,058) (1,586)
Translation adjustment (3) (46) (229) 455
Balance at end of period (1,287) (1,131) (1,287) (1,131)
Translation adjustment, tax effect 0 (3) (10) 0
Unrealized gain (loss) on marketable securities        
Accumulated Other Comprehensive Income (Loss) [Roll Forward]        
Balance at beginning of period 0 0 0 (1)
Current period changes in fair value 0 (1) 0 0
Unrealized gain (loss) on cash flow hedges        
Accumulated Other Comprehensive Income (Loss) [Roll Forward]        
Balance at beginning of period (129) (337) (253) 91
Current period changes in fair value 25 61 116 (323)
Reclassification to earnings 5 14 38 (30)
Balance at end of period (99) (262) (99) (262)
Current period changes in fair value, tax effect 9 19 37 (102)
Reclassification to earnings, tax effect 2 5 12 (9)
Unrecognized pension and postretirement benefit costs        
Accumulated Other Comprehensive Income (Loss) [Roll Forward]        
Balance at beginning of period (2,841) (2,753) (2,897) (2,813)
Reclassification to earnings 29 30 85 90
Balance at end of period (2,812) (2,723) (2,812) (2,723)
Reclassification to earnings, tax effect $ 8 $ 9 $ 26 $ 28