Derivative Instruments - Textuals (Details) MMBTU in Millions		12 Months Ended
	Dec. 22, 2015 USD ($)	Dec. 31, 2016 USD ($) MMBTU	Dec. 31, 2015 USD ($)	Dec. 31, 2014 USD ($)	Sep. 30, 2015 USD ($)
Derivative Instruments, Gain (Loss) [Line Items]
Net liability position of derivatives		$ (3,000,000)
Collateral provided to counterparties related to derivatives		$ 10,000,000
Commodity contracts
Derivative Instruments, Gain (Loss) [Line Items]
Aggregate notional amount | MMBTU		36
Ineffectiveness recorded on contracts			$ 0	$ 0
Unrealized loss		$ 1,000,000	2,000,000
Commodity contracts | Derivatives Designated as Hedging Instruments
Derivative Instruments, Gain (Loss) [Line Items]
Ineffectiveness recorded on contracts		0
Commodity contracts | Derivatives | Derivatives Designated as Hedging Instruments
Derivative Instruments, Gain (Loss) [Line Items]
Unrealized gain (loss) remaining in AOCI		(2,000,000)	(19,000,000)
Foreign exchange contracts
Derivative Instruments, Gain (Loss) [Line Items]
Gain reclassified from AOCI to earnings	$ 1,000,000
Foreign exchange contracts | Derivatives Designated as Hedging Instruments
Derivative Instruments, Gain (Loss) [Line Items]
Ineffectiveness recorded on contracts		0	0	$ 0
Notional amounts of foreign exchange forward contracts		80,000,000
Foreign exchange contracts | Derivatives in Net Investment Hedging Relationships
Derivative Instruments, Gain (Loss) [Line Items]
Notional amounts of foreign exchange forward contracts					$ 35,000,000
Foreign exchange contracts | Derivatives | Derivatives Designated as Hedging Instruments
Derivative Instruments, Gain (Loss) [Line Items]
Unrealized gain (loss) remaining in AOCI		$ 0	$ 8,000,000