Derivatives and Hedging Activities - Carrying and Estimated Fair Value (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019	Dec. 31, 2019
Commodity contracts | Cash flow hedging
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Amount of gain (loss) recognized in accumulated OCI or OCL (effective portion)	$ 5	$ (3)	$ 2	$ 1
Foreign Currency | Net investment hedging
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Amount of gain (loss) recognized in accumulated OCI or OCL (effective portion)	(16)	$ (12)	(2)	$ 7
Prepayments and other current assets | Commodity contracts | Cash flow hedging | Carrying Amount
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Derivative asset (liabilities)	1		1		$ 0
Long-term debt | Foreign Currency | Net investment hedging | Carrying Amount
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Derivative asset (liabilities)	$ 878		$ 878		$ 850