Business Segments - Additional Information (Details) - USD ($) $ in Millions	3 Months Ended			6 Months Ended
	Jun. 30, 2017	Jun. 30, 2016	Mar. 31, 2016	Jun. 30, 2017	Jun. 30, 2016	Dec. 31, 2016
Restructuring Cost and Reserve [Line Items]
Restructuring charges	$ 0.0	$ (1.0)	$ (9.0)	$ 0.0	$ (10.0)
Restructuring reserve	13.4			13.4		$ 33.1
Facility Closing [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring reserve	6.8			6.8
Employee benefit costs [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring reserve	$ 6.6			$ 6.6