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ACCUMULATED OTHER COMPREHENSIVE LOSS (Details) - USD ($)
$ in Millions
 6 Months Ended
Jun. 30, 2023
Jun. 30, 2022
AOCI Attributable to Parent, Net of Tax    
Beginning balance, tax effect $ 782 $ 1,184
Beginning balance 6,582 3,887
Reclassifications into earnings, tax effect (28) (37)
Reclassification into earnings (net of tax effect) 94 122
Changes in value, tax effect 1  
Changes in value (net of tax effect) (2)  
Ending balance, tax effect 755 1,147
Ending balance 8,100 3,811
Accumulated Other Comprehensive Loss    
AOCI Attributable to Parent, Net of Tax    
Beginning balance (5,801) (7,130)
Ending balance (5,709) (7,008)
Pension and Other Benefits Liabilities    
AOCI Attributable to Parent, Net of Tax    
Beginning balance, AOCI before tax (6,624) (8,355)
Reclassifications into earnings 122 159
Changes in value 0  
Ending balance, AOCI before tax (6,502) (8,196)
Other    
AOCI Attributable to Parent, Net of Tax    
Beginning balance, AOCI before tax 41 41
Reclassifications into earnings 0 0
Changes in value (3)  
Ending balance, AOCI before tax $ 38 $ 41