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Accumulated Other Comprehensive Loss (Reclassification out of AOCI) (Details) - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]      
Tax benefit $ (108) $ (26) $ (59)
Foreign currency hedge and interest rate swap settlements (5) 1 5
Net income (loss) 26 (51) $ 209
Reclassification out of Accumulated Other Comprehensive Income | Accumulated foreign currency adjustments      
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]      
Reclassification of foreign currency adjustments (6) 12  
Tax benefit 0 0  
Net income (loss) (6) 12  
Reclassification out of Accumulated Other Comprehensive Income | Accumulated pension liability adjustments      
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]      
Amortization of actuarial loss (32) (24)  
Tax benefit 17 4  
Net income (loss) (15) (20)  
Reclassification out of Accumulated Other Comprehensive Income | Changes in fair value for derivatives      
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]      
Tax benefit 4 2  
Foreign currency hedge and interest rate swap settlements (16) (13)  
Net income (loss) $ (12) $ (11)