Accumulated Other Comprehensive Loss, Net of Tax Reclassification of Accumulated Other Comprehensive Loss (Details) - USD ($) $ in Millions		3 Months Ended		6 Months Ended
		Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2016	Jun. 30, 2015
Accumulated Other Comprehensive Income (Loss), Net of Tax [Abstract]
Foreign currency translation adjustments	[1]	$ 7.5	$ (0.7)	$ 6.5	$ (1.2)
Gains on available-for-sale securities		(1.2)	0.0	(1.2)	0.0
Losses on derivative instruments		0.5	0.5	1.0	1.0
Amortization of defined benefit pension and postretirement plans items	[2]	0.0	3.4	2.7	6.4
Tax effect		0.0	(1.3)	(0.9)	(2.7)
Total amount reclassified from accumulated other comprehensive loss, net of tax		$ 6.8	$ 1.9	$ 8.1	$ 3.5

[1] These foreign currency translation adjustments are primarily a result of write-offs from the sales of businesses

[2] These accumulated other comprehensive loss components are included in the computation of net periodic cost. See Note 9 for further information.