Recent Accounting Pronouncements Adoption of ASU 2014-09 - Opening Balance Sheet Cumulative Effect Adjustments (Details) - Accounting Standards Update 2014-09 [Member] - USD ($) $ in Millions	Jan. 01, 2018	Dec. 31, 2017
Accounts Receivable [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Balance as of December 31, 2017 - Prior to Adoption of ASU 2014-09		$ 629.6
New Accounting Pronouncement or Change in Accounting Principle, Effect of Adoption, Quantification	$ (71.9)
Balance as of January 1, 2018 - Subsequent to Adoption of ASU 2014-09	557.7
Inventories [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Balance as of December 31, 2017 - Prior to Adoption of ASU 2014-09		311.9
New Accounting Pronouncement or Change in Accounting Principle, Effect of Adoption, Quantification	66.3
Balance as of January 1, 2018 - Subsequent to Adoption of ASU 2014-09	378.2
Other Current Assets [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Balance as of December 31, 2017 - Prior to Adoption of ASU 2014-09		147.4
New Accounting Pronouncement or Change in Accounting Principle, Effect of Adoption, Quantification	43.2
Balance as of January 1, 2018 - Subsequent to Adoption of ASU 2014-09	190.6
Deferred Tax Assets [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Balance as of December 31, 2017 - Prior to Adoption of ASU 2014-09		149.9
New Accounting Pronouncement or Change in Accounting Principle, Effect of Adoption, Quantification	1.0
Balance as of January 1, 2018 - Subsequent to Adoption of ASU 2014-09	150.9
Accrued Liabilities [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Balance as of December 31, 2017 - Prior to Adoption of ASU 2014-09		384.4
New Accounting Pronouncement or Change in Accounting Principle, Effect of Adoption, Quantification	43.7
Balance as of January 1, 2018 - Subsequent to Adoption of ASU 2014-09	428.1
Other Noncurrent Liabilities [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Balance as of December 31, 2017 - Prior to Adoption of ASU 2014-09		175.6
New Accounting Pronouncement or Change in Accounting Principle, Effect of Adoption, Quantification	(1.0)
Balance as of January 1, 2018 - Subsequent to Adoption of ASU 2014-09	174.6
Retained Earnings [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Balance as of December 31, 2017 - Prior to Adoption of ASU 2014-09		$ 1,856.1
New Accounting Pronouncement or Change in Accounting Principle, Effect of Adoption, Quantification	(4.1)
Balance as of January 1, 2018 - Subsequent to Adoption of ASU 2014-09	$ 1,852.0