Derivatives and Hedging Activities - Carrying and Estimated Fair Value (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Commodity contracts | Cash Flow Hedging
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Other comprehensive income (loss), cash flow hedge, gain (loss), before reclassification and tax	$ 4	$ 1	$ 0
Commodity contracts | Cash Flow Hedging | Carrying Amount | Prepayments and other current assets
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Derivative assets (liabilities), at fair value, net	3	0
Foreign exchange contracts | Net Investment Hedging
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Other comprehensive income (loss), cash flow hedge, gain (loss), before reclassification and tax	(74)	20	$ (3)
Foreign exchange contracts | Net Investment Hedging | Carrying Amount | Long-term debt
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Derivative assets (liabilities), at fair value, net	$ 420	$ 850