Financial Instruments - Balance Sheet (Details) - USD ($) $ in Millions	12 Months Ended
Dec. 31, 2018	Dec. 31, 2017
Derivatives, Fair Value [Line Items]
Accumulated other comprehensive income (loss), cumulative changes in net gain (loss) from hedges, before tax	$ (14.1)	$ (56.5)
Cash Flow Hedge Gain (Loss) to be Reclassified within Twelve Months	(0.2)
Foreign currency contracts [Member]
Derivatives, Fair Value [Line Items]
Accumulated other comprehensive income (loss), cumulative changes in net gain (loss) from hedges, before tax	0.1	(2.3)
Cash Flow Hedge Gain (Loss) to be Reclassified within Twelve Months	0.0
Commodity Contract [Member]
Derivatives, Fair Value [Line Items]
Accumulated other comprehensive income (loss), cumulative changes in net gain (loss) from hedges, before tax	(0.2)	0.0
Cash Flow Hedge Gain (Loss) to be Reclassified within Twelve Months	(0.2)
Net investment hedge contracts [Member] \| Foreign currency contracts [Member]
Derivatives, Fair Value [Line Items]
Accumulated other comprehensive income (loss), cumulative changes in net gain (loss) from hedges, before tax	4.5	2.9
Net investment hedge contracts [Member] \| Cross Currency Interest Rate Contract [Member]
Derivatives, Fair Value [Line Items]
Accumulated other comprehensive income (loss), cumulative changes in net gain (loss) from hedges, before tax	11.9	0.0
Net investment hedge contracts [Member] \| Foreign currency denominated debt designated as a net investment hedge [Member]
Derivatives, Fair Value [Line Items]
Accumulated other comprehensive income (loss), cumulative changes in net gain (loss) from hedges, before tax	(30.4)	(57.1)
Designated as Hedging Instrument [Member] \| Foreign currency contracts [Member] \| Prepaid Expenses and Other Current Assets [Member]
Derivatives, Fair Value [Line Items]
Derivative assets	1.9	0.9
Designated as Hedging Instrument [Member] \| Foreign currency contracts [Member] \| Accounts Payable and Accrued Liabilities [Member]
Derivatives, Fair Value [Line Items]
Derivative liabilities	1.6	3.9
Designated as Hedging Instrument [Member] \| Foreign currency contracts [Member] \| Other non-current assets
Derivatives, Fair Value [Line Items]
Derivative assets	0.0	0.8
Designated as Hedging Instrument [Member] \| Foreign currency contracts [Member] \| Other non-current liabilities
Derivatives, Fair Value [Line Items]
Derivative liabilities	0.1	0.0
Designated as Hedging Instrument [Member] \| Commodity Contract [Member] \| Prepaid Expenses and Other Current Assets [Member]
Derivatives, Fair Value [Line Items]
Derivative assets	0.0	0.0
Designated as Hedging Instrument [Member] \| Commodity Contract [Member] \| Accounts Payable and Accrued Liabilities [Member]
Derivatives, Fair Value [Line Items]
Derivative liabilities	0.2	0.0
Designated as Hedging Instrument [Member] \| Cross Currency Interest Rate Contract [Member] \| Other Current Assets [Member]
Derivatives, Fair Value [Line Items]
Derivative assets	0.0	0.0
Designated as Hedging Instrument [Member] \| Cross Currency Interest Rate Contract [Member] \| Other non-current assets
Derivatives, Fair Value [Line Items]
Derivative assets	11.9	0.0
Designated as Hedging Instrument [Member] \| Cross Currency Interest Rate Contract [Member] \| Other non-current liabilities
Derivatives, Fair Value [Line Items]
Derivative liabilities	0.0	0.0
Designated as Hedging Instrument [Member] \| Cross Currency Interest Rate Contract [Member] \| Accounts payable and accrued expenses
Derivatives, Fair Value [Line Items]
Derivative liabilities	0.0	0.0
Not Designated as Hedging Instrument [Member] \| Foreign currency contracts [Member] \| Prepaid Expenses and Other Current Assets [Member]
Derivatives, Fair Value [Line Items]
Derivative assets	1.1	0.0
Not Designated as Hedging Instrument [Member] \| Foreign currency contracts [Member] \| Accounts Payable and Accrued Liabilities [Member]
Derivatives, Fair Value [Line Items]
Derivative liabilities	$ 0.0	$ 1.1

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- Definition

The estimated net amount of existing gains or losses on cash flow hedges at the reporting date expected to be reclassified to earnings within the next 12 months.

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- Definition

Fair value, before effects of master netting arrangements, of a financial asset or other 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 assets elected not to be offset. Excludes assets not subject to a master netting arrangement.

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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.

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- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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No definition available.

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