Other Expense (Income), net (Details) - USD ($) $ in Millions	3 Months Ended			6 Months Ended
	Jun. 30, 2016	Jun. 30, 2015	Mar. 31, 2015	Jun. 30, 2016	Jun. 30, 2015
Other Income and Expenses [Abstract]
Provision for environmental remediation, net	$ 5.3	$ 0.7		$ 7.5	$ (2.6)
Third-party acquisition-related costs	2.5	0.0		2.5	0.0
Chapter 11 expenses, net	0.8	1.6		2.0	3.2
Interest income	(0.2)	1.4		0.3	(1.7)
Currency transaction effects	(0.4)	0.0		(0.6)	(0.2)
Net (gain) loss on sales of investments and disposals of assets	(0.3)	0.0		0.2	0.4
Bankruptcy-related charges, net	0.0	0.0		0.0	(8.7)
Other miscellaneous expense (income)	0.7	1.3		(1.7)	0.8
Total other expense (income), net	$ 8.4	$ 5.0		$ 10.2	$ (8.8)
Gain related to release of bankruptcy liabilities			$ 9.0