Derivative Instruments - Derivatives and Hedges (Details) - USD ($) $ in Millions	3 Months Ended	12 Months Ended
	Jun. 30, 2019	Dec. 31, 2019	Dec. 31, 2018
Derivatives and Hedges
Proceeds for hedging activity		$ (28)
Net investment hedges
Derivatives and Hedges
Unrecognized (loss) gain included in Accumulated OCI		8	$ 4
Commodity forward contracts | Cash Flow Hedges
Derivatives and Hedges
Unrecognized (loss) gain included in Accumulated OCI		1	1
Foreign exchange risk | Cash Flow Hedges
Derivatives and Hedges
Proceeds for hedging activity	$ 15
Unrecognized (loss) gain included in Accumulated OCI			(9)
Foreign exchange risk | Cash Flow Hedges | Maximum
Derivatives and Hedges
Unrecognized (loss) gain included in Accumulated OCI		(1)
Interest rate swaps | Fair Value Hedges
Derivatives and Hedges
Proceeds for hedging activity	$ 13
Interest rate risk | Cash Flow Hedges
Derivatives and Hedges
Unrecognized (loss) gain included in Accumulated OCI		$ (1)
Interest rate risk | Cash Flow Hedges | Maximum
Derivatives and Hedges
Unrecognized (loss) gain included in Accumulated OCI			$ (1)