Adoption of ASC 606 (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017	Jan. 01, 2018	Dec. 31, 2017
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Accounts receivable, net	$ 290.4		$ 278.2	$ 253.2
Inventories	215.7		194.4	215.2
Other current assets	37.6		30.8	39.2
Other current liabilities	69.6		63.3	77.0
Deferred income taxes	12.3		13.4	10.4
Other long-term liabilities	35.6		37.7	42.6
Retained earnings	1,222.8		1,189.6	$ 1,178.2
Net sales	415.7	$ 387.7
Cost of goods and services sold	281.3	253.5
Other expense	3.1	0.9
Income tax expense	(12.5)	(2.2)
Net income	(43.6)	$ (60.9)
Difference between Revenue Guidance in Effect before and after Topic 606 [Member] | Accounting Standards Update 2014-09 [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Accounts receivable, net	22.8		25.0
Inventories	(19.0)		(20.8)
Other current assets	(8.9)		(8.4)
Other current liabilities	(13.4)		(13.7)
Deferred income taxes	2.6		3.0
Other long-term liabilities	(4.8)		(4.9)
Retained earnings	10.5		$ 11.4
Net sales	(2.6)
Cost of goods and services sold	(1.4)
Other expense	0.1
Income tax expense	0.4
Net income	0.9
Calculated under Revenue Guidance in Effect before Topic 606 [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Accounts receivable, net	267.6
Inventories	234.7
Other current assets	46.5
Other current liabilities	83.0
Deferred income taxes	9.7
Other long-term liabilities	40.4
Retained earnings	1,212.3
Net sales	418.3
Cost of goods and services sold	282.7
Other expense	3.0
Income tax expense	(12.9)
Net income	$ (44.5)