Financial Instruments, Risk Management and Fair Value Measurements - Fair Value of Derivatives by Balance Sheet Location (Details) - USD ($) $ in Millions	Jun. 30, 2021	Dec. 31, 2020
Derivative Asset [Abstract]
Total Gross Amounts	$ 34.1	$ 21.4
Gross amounts offset in the condensed consolidated balance sheet	(23.0)	(21.1)
Net Amounts	11.1	0.3
Derivative Liability [Abstract]
Derivative Liabilities	(54.1)	(46.7)
Gross amounts offset in the condensed consolidated balance sheet	23.0	21.1
Net Amounts	(31.1)	(25.6)
Net derivative assets (liabilities)	(20.0)	(25.3)
Net amounts of derivative assets (liabilities)	(20.0)	(25.3)
Foreign exchange contracts
Derivative Asset [Abstract]
Total Gross Amounts	30.7	21.3
Gross amounts offset in the condensed consolidated balance sheet	(23.0)	(21.1)
Net Amounts	7.7	0.2
Derivative Liability [Abstract]
Derivative Liabilities	(54.1)	(45.8)
Gross amounts offset in the condensed consolidated balance sheet	23.0	21.1
Net Amounts	(31.1)	(24.7)
Interest rate contracts
Derivative Asset [Abstract]
Total Gross Amounts	3.4	0.1
Gross amounts offset in the condensed consolidated balance sheet	0.0	0.0
Net Amounts	3.4	0.1
Derivative Liability [Abstract]
Derivative Liabilities		(0.9)
Gross amounts offset in the condensed consolidated balance sheet		0.0
Net Amounts		(0.9)
Designated as Cash Flow Hedges
Derivative Asset [Abstract]
Total Gross Amounts	27.0	19.5
Derivative Liability [Abstract]
Derivative Liabilities	(46.7)	(43.6)
Net derivative assets (liabilities)	(19.7)	(24.1)
Designated as Cash Flow Hedges \| Foreign exchange contracts
Derivative Asset [Abstract]
Total Gross Amounts	23.6	19.4
Derivative Liability [Abstract]
Derivative Liabilities	(46.7)	(42.7)
Designated as Cash Flow Hedges \| Interest rate contracts
Derivative Asset [Abstract]
Total Gross Amounts	3.4	0.1
Derivative Liability [Abstract]
Derivative Liabilities		(0.9)
Not Designated as Hedging Instruments
Derivative Asset [Abstract]
Total Gross Amounts	7.1	1.9
Derivative Liability [Abstract]
Derivative Liabilities	(7.4)	(3.1)
Net derivative assets (liabilities)	(0.3)	(1.2)
Not Designated as Hedging Instruments \| Foreign exchange contracts
Derivative Asset [Abstract]
Total Gross Amounts	7.1	1.9
Derivative Liability [Abstract]
Derivative Liabilities	(7.4)	(3.1)
Not Designated as Hedging Instruments \| Interest rate contracts
Derivative Asset [Abstract]
Total Gross Amounts	$ 0.0	0.0
Derivative Liability [Abstract]
Derivative Liabilities		$ 0.0

Fair value of liability associated with 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.

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The net amount as of the balance sheet date of the fair value of derivative assets and derivative liabilities that in accordance with the entity's accounting policy were offset against collateral under a master netting arrangement.

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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, after offset of derivative liability, of 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, before offset against an obligation to return collateral under a master netting arrangement. 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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Fair value of the assets less the liabilities of a derivative or group of derivatives.

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Fair value of asset associated with 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.

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