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Geographic and Segment Information - Reconciliation of Segment Adjusted EBITDA from Segments to Consolidated Income (Loss) Before Income Taxes (Details) - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2020
Dec. 31, 2019
Dec. 31, 2018
Segment Reporting [Abstract]      
Segment Adjusted EBITDA $ 1,063 $ 1,163 $ 1,902
Corporate and Other expenses (excluding items below) (184) (143) (162)
Interest expense, net (210) (208) (195)
Depreciation and amortization (320) (311) (284)
Non-operating pension and other post-retirement employee benefit income (cost) 1 (368) 27
Exchange (losses) gains, net (26) (2) 1
Restructuring, asset-related, and other charges (80) (87) (49)
Loss on extinguishment of debt (22) 0 (38)
Gain on sales of assets and businesses 8 10 45
Transaction costs (2) (3) (9)
Legal and environmental charges (49) (175) (82)
Other charges     (1)
Income (loss) before income taxes $ 179 $ (124) $ 1,155