Commitments (Details) - USD ($) $ in Millions	3 Months Ended	12 Months Ended
Mar. 31, 2016	Dec. 31, 2015
Capital Investment Commitments [Member]
Long-term Purchase Commitment [Line Items]
Commitments for future capital investments		$ 45.7
Research And Innovation Center Middletown OH [Member]
Long-term Purchase Commitment [Line Items]
Estimated cost of construction projects	$ 36.0	$ 36.0

Minimum amount of purchase arrangement maturing in the next fiscal year following the latest fiscal year. Includes, but not limited to, recorded and unrecorded purchase obligations, long-term purchase commitments, and short-term purchase commitments.

No definition available.

Name:	us-gaap_PurchaseObligationDueInNextTwelveMonths
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant