Derivative Financial Instruments and Fair Value Measurements - Fair Value of Derivative and Non-Derivative Assets and Liabilities on the Consolidated Balance Sheets (Details) - USD ($) $ in Millions	Jun. 30, 2019	Dec. 31, 2018
Derivatives, Fair Value [Line Items]
Assets	$ 14.3	$ 0.1
Liabilities	1,083.5	1,032.1
Designated as hedging instrument \| Cross-currency swap \| Prepaid expenses and other assets
Derivatives, Fair Value [Line Items]
Assets	5.1	0.0
Designated as hedging instrument \| Euro Notes \| Long-term debt
Derivatives, Fair Value [Line Items]
Liabilities	1,083.5	1,032.0
Not designated as hedging instrument \| Foreign currency forward contracts \| Accounts receivable, net
Derivatives, Fair Value [Line Items]
Assets	9.2	0.1
Not designated as hedging instrument \| Foreign currency forward contracts \| Accrued liabilities
Derivatives, Fair Value [Line Items]
Liabilities	$ 0.0	$ 0.1

Fair value, before effects of master netting arrangements, of a financial liability or contract with one or more underlyings, notional amount or payment provision or both, and the contract can be net settled by means outside the contract or delivery of an asset. Includes liabilities elected not to be offset. Excludes liabilities not subject to a master netting arrangement.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 860
-SubTopic 20
-Section 50
-Paragraph 4D
-Subparagraph (c)(2)
-URI http://asc.fasb.org/extlink&oid=109247956&loc=SL51823488-111719

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 815
-SubTopic 10
-Section 50
-Paragraph 4B
-Subparagraph (a),(c)
-URI http://asc.fasb.org/extlink&oid=109980867&loc=SL5624163-113959

Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 20
-Section 50
-Paragraph 3
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=51824906&loc=SL20225862-175312

Reference 4: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 20
-Section 55
-Paragraph 7
-URI http://asc.fasb.org/extlink&oid=99393222&loc=SL20226000-175313

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