Restructuring and Other Expense - Schedule of Restructuring Reserve Activity (Details) - USD ($) $ in Millions	3 Months Ended				9 Months Ended
	Sep. 30, 2017	Jun. 30, 2017	Mar. 31, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016
Restructuring Reserve [Roll Forward]
Charges	$ 0.4			$ 0.4	$ 0.4	$ 0.4
Restructuring Plan | Severance and Related
Restructuring Reserve [Roll Forward]
Accrued balance, beginning balance	0.3	$ 0.2	$ 0.0		0.0
Charges		0.3	0.6
Usage and payments	(0.3)	(0.2)	(0.4)
Accrued balance, ending balance	$ 0.0	$ 0.3	$ 0.2		$ 0.0