Annual report [Section 13 and 15(d), not S-K Item 405]

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, 2025
Dec. 31, 2024
Dec. 31, 2023
Accumulated Other Comprehensive Income (Loss) [Roll Forward]      
Balance at beginning of year $ 16,743    
Balance at end of year 16,255 $ 16,743  
AOCI Including Portion Attributable to Noncontrolling Interest      
Accumulated Other Comprehensive Income (Loss) [Roll Forward]      
Balance at beginning of year (4,309) (3,758)  
Balance at end of year (4,208) (4,309) $ (3,758)
Foreign Currency Translation Loss, Net of Tax:      
Accumulated Other Comprehensive Income (Loss) [Roll Forward]      
Balance at beginning of year (1,586) (1,248) (1,446)
Current period changes in fair value 528 (338) 190
Reclassification to earnings 0 0 8
Balance at end of year (1,058) (1,586) (1,248)
Current period changes in fair value, tax effect 9 (7) (15)
Reclassification to earnings, tax effect 0 0 0
Unrealized Loss on Marketable Securities, Net of Tax:      
Accumulated Other Comprehensive Income (Loss) [Roll Forward]      
Balance at beginning of year (1) (2) (11)
Current period changes in fair value 1 1 7
Reclassification to earnings 0 0 2
Balance at end of year 0 (1) (2)
Current period changes in fair value, tax effect 0 0 2
Reclassification to earnings, tax effect 0 0 1
Unrealized (Loss) Gain on Cash Flow Hedges, Net of Tax:      
Accumulated Other Comprehensive Income (Loss) [Roll Forward]      
Balance at beginning of year 91 (76) 167
Current period changes in fair value (330) 296 (89)
Reclassification to earnings (14) (129) (154)
Balance at end of year (253) 91 (76)
Current period changes in fair value, tax effect (104) 93 (28)
Reclassification to earnings, tax effect (5) (41) (48)
Unrecognized Pension and Postretirement Benefit Costs, Net of Tax:      
Accumulated Other Comprehensive Income (Loss) [Roll Forward]      
Balance at beginning of year (2,813) (2,432) (259)
Current period changes in fair value (204) (1,005) (2,530)
Reclassification to earnings 120 624 357
Balance at end of year (2,897) (2,813) (2,432)
Current period changes in fair value, tax effect (65) (315) (793)
Reclassification to earnings, tax effect 38 195 111
Common Stock | Common Class A      
Accumulated Other Comprehensive Income (Loss) [Roll Forward]      
Balance at beginning of year 2 2 2
Balance at end of year $ 1 $ 2 $ 2