Restructuring and Other Expense - Components of Restructuring and Other Expense (Details) - USD ($) $ in Millions		3 Months Ended		6 Months Ended
		Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014
Restructuring and Related Activities [Abstract]
Severance and related		$ 0.4	$ 2.4	$ 0.9	$ 2.8
Lease termination costs		0.0	0.0	0.0	0.1
Other		0.1	0.8	0.4	0.9
Total restructuring		0.5	3.2	1.3	3.8
Pension settlement/curtailment (Note 9)		0.0	0.6	0.0	(0.1)
Other	[1]	1.0	1.4	1.4	3.6
Total		$ 1.5	$ 5.2	$ 2.7	$ 7.3

[1] Other includes consulting fees and certain employee costs.