Annual report pursuant to Section 13 and 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
 12 Months Ended
Dec. 31, 2023
Dec. 31, 2022
Dec. 31, 2021
Accumulated Other Comprehensive Income (Loss) [Roll Forward]      
Balance at beginning of year $ 19,803    
Balance at end of year 17,314 $ 19,803  
AOCI Attributable to Parent      
Accumulated Other Comprehensive Income (Loss) [Roll Forward]      
Balance at beginning of year (1,549) (3,278)  
Balance at end of year (3,758) (1,549) $ (3,278)
Foreign currency translation gain (loss)      
Accumulated Other Comprehensive Income (Loss) [Roll Forward]      
Balance at beginning of year (1,446) (1,162) (981)
Current period changes in fair value 190 (315) (181)
Reclassification to earnings 8 31 0
Balance at end of year (1,248) (1,446) (1,162)
Current period changes in fair value, tax effect (15) (17) 42
Reclassification to earnings, tax effect 0 2 0
Unrealized gain (loss) on marketable securities      
Accumulated Other Comprehensive Income (Loss) [Roll Forward]      
Balance at beginning of year (11) (1) 6
Current period changes in fair value 7 (12) (2)
Reclassification to earnings 2 2 (5)
Balance at end of year (2) (11) (1)
Current period changes in fair value, tax effect 2 (3) 0
Reclassification to earnings, tax effect 1 1 0
Unrealized gain (loss) on cash flow hedges      
Accumulated Other Comprehensive Income (Loss) [Roll Forward]      
Balance at beginning of year 167 (17) (223)
Current period changes in fair value (89) 407 261
Reclassification to earnings (154) (223) (55)
Balance at end of year (76) 167 (17)
Current period changes in fair value, tax effect (28) 128 82
Reclassification to earnings, tax effect (48) (70) (17)
Unrecognized pension and postretirement benefit costs      
Accumulated Other Comprehensive Income (Loss) [Roll Forward]      
Balance at beginning of year (259) (2,098) (5,915)
Current period changes in fair value (2,530) 2,576 6,195
Reclassification to earnings 357 (737) (2,378)
Balance at end of year (2,432) (259) (2,098)
Current period changes in fair value, tax effect (793) 810 1,956
Reclassification to earnings, tax effect $ 111 $ (230) $ (749)