Derivatives and Fair Value Measurements (Details) - USD ($)	3 Months Ended	12 Months Ended
	Mar. 31, 2017	Dec. 31, 2017
Company's foreign currency and commodity positions by Year of Maturity and Account Classification
Derivative Assets (Liabilities), at Fair Value, Net	$ 0
Derivative, Foreign Currency Option, Aggregate Amount	1.3
Timing differences between the hedge settlement and the purchase transaction	Less than a day and up to a maximum of 30 days
Scenario, Forecast [Member] | Foreign currency forward contract [Member]
Company's foreign currency and commodity positions by Year of Maturity and Account Classification
Net loss to be reclassified from accumulated other comprehensive loss to earnings over the next 12 months		$ 65,000,000