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ACCUMULATED OTHER COMPREHENSIVE LOSS (Details) - USD ($)
$ in Millions
 6 Months Ended
Jun. 30, 2025
Jun. 30, 2024
AOCI Attributable to Parent, Net of Tax    
Beginning balance, tax effect $ 536 $ 796
Beginning balance 15,293 11,105
Changes in value, tax effect 0 0
Changes in value, net (1) 3
Reclassifications into earnings, tax effect (24) (31)
Reclassifications into earnings, net 81 102
Ending balance, tax effect 512 765
Ending balance 17,440 12,386
Accumulated Other Comprehensive Loss    
AOCI Attributable to Parent, Net of Tax    
Beginning balance (4,979) (5,845)
Ending balance (4,899) (5,740)
Pension and Other Benefit Liabilities    
AOCI Attributable to Parent, Net of Tax    
Beginning balance, AOCI before tax (5,557) (6,681)
Changes in value 0 0
Reclassifications into earnings 105 133
Ending balance, AOCI before tax (5,452) (6,548)
Other    
AOCI Attributable to Parent, Net of Tax    
Beginning balance, AOCI before tax 42 40
Changes in value (1) 3
Reclassifications into earnings 0 0
Ending balance, AOCI before tax $ 41 $ 43