Schedule II - Valuation and Qualifying Accounts 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 [Roll Forward]
Valuation allowances and reserves, balance	$ 3.1	$ 4.3	$ 4.6
Additions, charged to costs and expenses	4.6	0.4	2.5
Acquisitions and other	2.1	0.0	0.0
Valuation Allowances and Reserves, Additions for Adjustments	0.0	0.0	0.0
Deductions	2.8	1.6	2.8
Valuation allowances and reserves, balance	7.0	3.1	4.3
Valuation Allowance of Deferred Tax Assets [Member]
Movement in Valuation Allowances and Reserves [Roll Forward]
Valuation allowances and reserves, balance	164.8	167.3	156.9
Additions, charged to costs and expenses	26.6	18.4	31.9
Acquisitions and other	13.7	0.0	0.0
Valuation Allowances and Reserves, Additions for Adjustments	0.0	0.0	0.0
Deductions	24.7	20.9	21.5
Valuation allowances and reserves, balance	180.4	164.8	167.3
Inventory Valuation Reserve [Member]
Movement in Valuation Allowances and Reserves [Roll Forward]
Valuation allowances and reserves, balance	14.8	17.1	27.9
Additions, charged to costs and expenses	39.1	7.5	11.1
Acquisitions and other	9.2	0.0	0.0
Valuation Allowances and Reserves, Additions for Adjustments	0.0	0.0	(12.2)
Deductions	45.8	9.8	9.7
Valuation allowances and reserves, balance	$ 17.3	$ 14.8	$ 17.1

A roll forward is a reconciliation of a concept from the beginning of a period to the end of a period.

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- Definition

Amount of increase (decrease) in the allowances and reserves, which consist of the valuation and qualifying accounts that are either netted against the cost of an asset or that reflect a liability established to represent expected future costs, from adjustments.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 235
-SubTopic 10
-Section S99
-Paragraph 4
-Subparagraph (SX 210.12-09)
-URI http://asc.fasb.org/extlink&oid=26873400&loc=d3e24092-122690

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Total of allowances and reserves, the valuation and qualifying accounts that are either netted against the cost of an asset (in order to value it at its carrying value) or that reflect a liability established to represent expected future costs.

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Amount of increase in the allowances and reserves, which consist of the valuation and qualifying accounts that are either netted against the cost of an asset or that reflect a liability established to represent expected future costs, from charges to costs and expenses.

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- Definition

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