Derivatives and Hedging Activities - Carrying and Estimated Fair Value (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 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)	$ 1	$ (1)	$ 3	$ 0
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)	(38)	$ 38	(40)	$ 45
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)	2		2		$ 0
Long-term debt | Foreign Currency | Net investment hedging | Carrying Amount
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Derivative asset (liabilities)	$ 913		$ 913		$ 850