Restructuring (Details) $ in Millions	12 Months Ended
	Dec. 31, 2016 USD ($)
Restructuring Cost and Reserve [Line Items]
Restructuring charges	$ 2.4
Operating Income (Loss) [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring charges	3.4
Minimum [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring, expected cost remaining	7.0
Minimum [Member] | Operating Income (Loss) [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring, expected cost remaining	10.0
Maximum [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring, expected cost remaining	10.0
Maximum [Member] | Operating Income (Loss) [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring, expected cost remaining	$ 15.0