Restructuring - Narrative (Details) - USD ($) $ in Millions	3 Months Ended				6 Months Ended		18 Months Ended
	Jun. 30, 2017	Mar. 31, 2017	Dec. 31, 2016	Jun. 30, 2016	Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2017
Restructuring Cost and Reserve [Line Items]
Restructuring expense	$ 0.6			$ 1.9	$ 1.0	$ 9.1
Restructuring Plan, 2016
Restructuring Cost and Reserve [Line Items]
Total expected restructuring cost under plan	12.0				12.0		$ 12.0
Restructuring expense	0.7						11.1
Reduction of restructuring reserve	0.1				0.4
Restructuring reserve, period increase (decrease)	0.6
Restructuring Plan, Tipper Tie
Restructuring Cost and Reserve [Line Items]
Total expected restructuring cost under plan	0.5				$ 0.5		$ 0.5
Restructuring and related costs, incurred cost	$ 0.1	$ 0.5	$ 4.0