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Divestitures - Turkey Subsidiary Divestment (Details)
€ in Millions, $ in Millions
3 Months Ended 6 Months Ended
Jun. 30, 2021
USD ($)
Jun. 30, 2020
USD ($)
Jun. 30, 2021
USD ($)
Jun. 30, 2020
USD ($)
May 17, 2021
USD ($)
May 17, 2021
EUR (€)
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]            
(Gain) loss on sale and disposal of businesses $ 120 $ 0 $ 120 $ 0    
Disposed of by Sale | Turkey Subsidiary            
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]            
Disposal group, consideration         $ 93 € 78
(Gain) loss on sale and disposal of businesses $ 120   (164)      
Loss (gain) on write-down of assets     40      
Gain (loss) of cumulative foreign currency translation adjustments     $ (124)