Restructuring - Restructuring Charges for All Ongoing Activities (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Restructuring and Related Activities [Abstract]
Severance and related expense	$ (1.5)	$ 11.1	$ 1.6
Asset write-offs	0.0	0.5	0.0
Other	1.5	2.9	0.0
Total Restructuring charges	$ 0.0	$ 14.5	$ 1.6