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CONSOLIDATED STATEMENTS OF COMPREHENSIVE LOSS (UNAUDITED) (Parenthetical) - USD ($)
$ in Millions
3 Months Ended 9 Months Ended
Sep. 30, 2024
Sep. 30, 2023
Sep. 30, 2024
Sep. 30, 2023
Statement of Comprehensive Income [Abstract]        
Change in net actuarial loss, tax $ (6) $ (6) $ (17) $ (16)
Change in net prior service cost, tax 1 1 3 3
Foreign currency translation adjustment and other, tax $ 0 $ 5 $ 0 $ (3)