Derivative Instruments - Derivatives and Hedges (Details) - USD ($) $ in Millions	3 Months Ended
	Sep. 30, 2020	Jun. 30, 2020	Dec. 31, 2019	Sep. 30, 2019
Commodity forward contracts | Cash Flow Hedges
Derivatives and Hedges
Unrecognized (loss) gain included in Accumulated OCI			$ 1	$ 1
Commodity forward contracts | Cash Flow Hedges | Maximum
Derivatives and Hedges
Unrecognized (loss) gain included in Accumulated OCI	$ 1
Foreign exchange risk | Cash Flow Hedges
Derivatives and Hedges
Unrecognized (loss) gain included in Accumulated OCI	9			(19)
Foreign exchange risk | Cash Flow Hedges | Maximum
Derivatives and Hedges
Unrecognized (loss) gain included in Accumulated OCI			(1)
Cross-currency swaps | Cash Flow Hedges
Derivatives and Hedges
Derivative cash outflow recognized in financing activities section of Consolidated Cash Flows	3	$ 3
Cross-currency swaps | Net investment hedges
Derivatives and Hedges
Derivative cash outflow recognized in financing activities section of Consolidated Cash Flows	5
Interest rate risk | Cash Flow Hedges
Derivatives and Hedges
Unrecognized (loss) gain included in Accumulated OCI			$ (1)	$ (2)
Interest rate risk | Cash Flow Hedges | Maximum
Derivatives and Hedges
Unrecognized (loss) gain included in Accumulated OCI	$ (1)