Fair Value Assets and Liabilities (Details) - USD ($) $ in Millions	Dec. 31, 2020	Dec. 31, 2019
Assets:
Foreign exchange forward contracts	$ 2.8	$ 5.6
Liabilities, Fair Value Disclosure [Abstract]
Foreign exchange forward contracts	6.0	3.8
Fair Value
Assets:
Available-for-sale securities	4.2	4.3
Foreign exchange forward contracts	2.8	5.6
Total	7.0	9.9
Liabilities, Fair Value Disclosure [Abstract]
Foreign exchange forward contracts	6.0	3.8
Total	6.0	3.8
Fair Value \| Level 1
Assets:
Available-for-sale securities	4.2	4.3
Foreign exchange forward contracts	0.0	0.0
Total	4.2	4.3
Liabilities, Fair Value Disclosure [Abstract]
Foreign exchange forward contracts	0.0	0.0
Total	0.0	0.0
Fair Value \| Level 2
Assets:
Available-for-sale securities	0.0	0.0
Foreign exchange forward contracts	2.8	5.6
Total	2.8	5.6
Liabilities, Fair Value Disclosure [Abstract]
Foreign exchange forward contracts	6.0	3.8
Total	$ 6.0	$ 3.8

Fair value portion of probable future economic benefits obtained or controlled by an entity as a result of past transactions or events.

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Amount of investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale).

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Fair value, after the 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 not subject to a master netting arrangement and not elected to be offset.

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Fair value, after the 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 not subject to a master netting arrangement and not elected to be offset.

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Fair value of financial obligations, including, but not limited to, debt instruments, derivative liabilities, federal funds purchased and sold under agreements to repurchase, securities loaned or sold under agreements to repurchase, financial instruments sold not yet purchased, guarantees, line of credit, loans and notes payable, servicing liability, and trading liabilities.

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