Derivative Instruments - Locations on Balance Sheet and Statement of Comprehensive Income (Loss) (Details) - USD ($) $ in Millions	Sep. 30, 2018	Dec. 31, 2017
Derivatives, Fair Value [Line Items]
Derivative assets	$ 5	$ 2
Derivative liabilities	16	17
Derivatives Not Designated as Hedging Instruments
Derivatives, Fair Value [Line Items]
Derivative assets	0	0
Derivative liabilities	0	0
Derivatives Not Designated as Hedging Instruments | Commodity contracts | Other current assets
Derivatives, Fair Value [Line Items]
Derivative assets	0	0
Derivatives Not Designated as Hedging Instruments | Commodity contracts | Accrued expenses
Derivatives, Fair Value [Line Items]
Derivative liabilities	0	0
Cash flow hedging | Derivatives in Cash Flow Hedging Relationships
Derivatives, Fair Value [Line Items]
Derivative assets	5	2
Derivative liabilities	16	17
Cash flow hedging | Derivatives in Cash Flow Hedging Relationships | Commodity contracts | Other current assets
Derivatives, Fair Value [Line Items]
Derivative assets	2	1
Cash flow hedging | Derivatives in Cash Flow Hedging Relationships | Commodity contracts | Other assets
Derivatives, Fair Value [Line Items]
Derivative assets	1	1
Cash flow hedging | Derivatives in Cash Flow Hedging Relationships | Commodity contracts | Accrued expenses
Derivatives, Fair Value [Line Items]
Derivative liabilities	5	6
Cash flow hedging | Derivatives in Cash Flow Hedging Relationships | Commodity contracts | Other liabilities
Derivatives, Fair Value [Line Items]
Derivative liabilities	11	8
Cash flow hedging | Derivatives in Cash Flow Hedging Relationships | Foreign exchange contracts | Other current assets
Derivatives, Fair Value [Line Items]
Derivative assets	2	0
Cash flow hedging | Derivatives in Cash Flow Hedging Relationships | Foreign exchange contracts | Other assets
Derivatives, Fair Value [Line Items]
Derivative assets	0	0
Cash flow hedging | Derivatives in Cash Flow Hedging Relationships | Foreign exchange contracts | Accrued expenses
Derivatives, Fair Value [Line Items]
Derivative liabilities	0	3
Cash flow hedging | Derivatives in Cash Flow Hedging Relationships | Foreign exchange contracts | Other liabilities
Derivatives, Fair Value [Line Items]
Derivative liabilities	$ 0	$ 0