Restructuring - Narrative (Details) - USD ($) $ in Millions	3 Months Ended			6 Months Ended
	Jun. 30, 2016	Mar. 31, 2016	Jun. 30, 2015	Jun. 30, 2016	Jun. 30, 2015
Restructuring Cost and Reserve [Line Items]
Restructuring expense	$ 1.9		$ 0.0	$ 9.1	$ 0.0
Restructuring Plan, 2014
Restructuring Cost and Reserve [Line Items]
Reduction of restructuring reserve	0.1	$ 0.3
Restructuring Plan, 2016
Restructuring Cost and Reserve [Line Items]
Restructuring expense	2.0	$ 7.5
Minimum | Restructuring Plan, 2016
Restructuring Cost and Reserve [Line Items]
Total expected restructuring cost under plan	11.0			11.0
Expected remaining restructuring costs	1.0			1.0
Maximum | Restructuring Plan, 2016
Restructuring Cost and Reserve [Line Items]
Total expected restructuring cost under plan	13.0			13.0
Expected remaining restructuring costs	$ 2.0			$ 2.0