Schedule II - Valuation and Qualifying Accounts (Details) - USD ($) $ in Millions		12 Months Ended
		Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Allowance for Doubtful Accounts [Member]
Movement in Valuation Allowances and Reserves
Balance at beginning of period		$ 10.2	$ 7.0	$ 6.5
Additions - Charged to costs and expenses		1.2	4.7	1.6
Deductions	[1]	(1.2)	(1.3)	(0.9)
Translations		(0.6)	0.2	0.2
Balance at end of period		10.8	10.2	7.0
Inventory Valuation Reserve [Member]
Movement in Valuation Allowances and Reserves
Balance at beginning of period		10.1	11.3	5.2
Additions - Charged to costs and expenses		2.4	3.8	14.8
Deductions	[2]	(4.9)	(4.7)	(8.3)
Translations		(0.9)	0.3	(0.4)
Balance at end of period		8.5	10.1	11.3
Valuation Allowance of Deferred Tax Assets [Member]
Movement in Valuation Allowances and Reserves
Balance at beginning of period		15.1	8.8	1.9
Additions - Charged to costs and expenses		11.1	7.0	7.2
Deductions	[3]	0.0	(0.1)	(0.1)
Translations		(1.0)	0.6	0.2
Balance at end of period		$ 27.2	$ 15.1	$ 8.8

[1] Reversal of amounts previously recorded as bad debt and uncollectible accounts written off.

[2] Inventory items written off against the allowance.

[3] Deductions to the deferred tax assets valuation allowance relate to decreased deferred tax assets and the release of the valuation allowance.