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SPECIAL CHARGES - Components of Special Charges (Details) - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2024
Dec. 31, 2023
Dec. 31, 2022
Restructuring and Related Activities [Abstract]      
(Gains) losses on sale of assets and other special charges $ 112 $ 135 $ 140
Labor contract ratification bonuses 0 814 0
Total operating special charges 112 949 140
Nonoperating unrealized (gains) losses on investments, net 199 (27) (20)
Nonoperating debt extinguishment and modification fees 128 11 7
Total nonoperating special charges and unrealized (gains) losses on investments, net 327 (16) (13)
Total operating and nonoperating special charges and unrealized (gains) losses on investments, net 439 933 127
Income tax benefit, net of valuation allowance (54) (214) (33)
Total operating and nonoperating special charges and unrealized (gains) losses on investments, net of income taxes $ 385 $ 719 $ 94