Quarterly report pursuant to Section 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, 2023
Sep. 30, 2022
Sep. 30, 2023
Sep. 30, 2022
Accumulated Other Comprehensive Income (Loss) [Roll Forward]        
Balance at beginning of period     $ 19,803  
Balance at end of period $ 19,180   19,180  
Accumulated other comprehensive income (loss)        
Accumulated Other Comprehensive Income (Loss) [Roll Forward]        
Balance at end of period (1,540) $ (3,218) (1,540) $ (3,218)
Foreign currency translation gain (loss)        
Accumulated Other Comprehensive Income (Loss) [Roll Forward]        
Balance at beginning of period (1,346) (1,447) (1,446) (1,162)
Translation adjustment (96) (263) 1 (548)
Reclassification to earnings     3 0
Balance at end of period (1,442) (1,710) (1,442) (1,710)
Translation adjustment, tax effect 0 4 (13) 11
Reclassification to earnings, tax effect     0 0
Unrealized gain (loss) on marketable securities        
Accumulated Other Comprehensive Income (Loss) [Roll Forward]        
Balance at beginning of period (20) (8) (11) (1)
Current period changes in fair value (2) (4) (13) (11)
Reclassification to earnings 0 1 2 1
Balance at end of period (22) (11) (22) (11)
Current period changes in fair value, tax effect (1) (1) (5) (3)
Reclassification to earnings, tax effect 0 0 1 0
Unrealized gain (loss) on cash flow hedges        
Accumulated Other Comprehensive Income (Loss) [Roll Forward]        
Balance at beginning of period 10 260 167 (17)
Current period changes in fair value 138 350 69 705
Reclassification to earnings (27) (69) (115) (147)
Balance at end of period 121 541 121 541
Current period changes in fair value, tax effect 44 110 22 222
Reclassification to earnings, tax effect (8) (21) (36) (46)
Unrecognized pension and postretirement benefit costs        
Accumulated Other Comprehensive Income (Loss) [Roll Forward]        
Balance at beginning of period (218) (2,056) (259) (2,098)
Current period changes in fair value     0 31
Reclassification to earnings 21 18 62 29
Balance at end of period (197) (2,038) (197) (2,038)
Current period changes in fair value, tax effect     0 11
Reclassification to earnings, tax effect $ 7 $ 5 $ 20 $ 8