Business Segment Information - Net Sales to External Customers and Long-lived Assets, by Geographic Region (Details) - USD ($) $ in Millions	3 Months Ended								12 Months Ended
	Dec. 31, 2015	Sep. 30, 2015	Jun. 30, 2015	Mar. 31, 2015	Dec. 31, 2014	Sep. 30, 2014	Jun. 30, 2014	Mar. 31, 2014	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Revenues from External Customers and Long-Lived Assets [Line Items]
Total net sales to external customers	$ 306.3	$ 292.7	$ 301.3	$ 279.2	$ 320.5	$ 314.6	$ 295.9	$ 280.3	$ 1,179.5	$ 1,211.3	$ 1,028.8
Total long-lived assets	221.8				216.9				221.8	216.9
United States [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Total net sales to external customers									576.0	541.6	456.4
Total long-lived assets	78.3				72.8				78.3	72.8
Rest of World [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Total net sales to external customers									603.5	669.7	$ 572.4
Total long-lived assets	$ 143.5				$ 144.1				$ 143.5	$ 144.1