Fair Value of Financial Instruments - Hierarchy (Details) - USD ($) $ in Millions	Dec. 31, 2020	Dec. 31, 2019
Significant Other Observable Inputs (Level 2)
Liabilities:
Fair value of long-term fixed interest rate debt	$ 549.8	$ 517.4
Recurring basis
Assets:
Time deposits and money market funds	183.2	9.0
Short-term investments	50.0	6.6
Interest rate and cross currency swap agreements	7.6	10.1
Foreign exchange contracts	2.1	0.9
Embedded derivatives in purchase and delivery contracts	0.1	0.1
Fixed price commodity contracts	3.1	0.3
Debt securities available for sale	1.2
Total assets recorded at fair value	247.3	27.0
Liabilities:
Contingent consideration	4.3	15.8
Hybrid instrument liability	13.9	10.6
Interest rate and cross currency swap agreements	61.5	16.9
Foreign exchange contracts	0.4	0.4
Embedded derivatives in purchase and delivery contracts		0.6
Total liabilities recorded at fair value	80.1	44.3
Recurring basis \| Significant Other Observable Inputs (Level 2)
Assets:
Time deposits and money market funds	183.2	9.0
Short-term investments	50.0	6.6
Interest rate and cross currency swap agreements	7.6	10.1
Foreign exchange contracts	2.1	0.9
Embedded derivatives in purchase and delivery contracts	0.1	0.1
Fixed price commodity contracts	3.1	0.3
Total assets recorded at fair value	246.1	27.0
Liabilities:
Interest rate and cross currency swap agreements	61.5	16.9
Foreign exchange contracts	0.4	0.4
Embedded derivatives in purchase and delivery contracts		0.6
Total liabilities recorded at fair value	61.9	17.9
Recurring basis \| Significant Unobservable Inputs (Level 3)
Assets:
Debt securities available for sale	1.2
Total assets recorded at fair value	1.2
Liabilities:
Contingent consideration	4.3	15.8
Hybrid instrument liability	13.9	10.6
Total liabilities recorded at fair value	$ 18.2	$ 26.4

Fair value portion of liability related to hybrid instrument liability.

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Fair value portion of short term investments accounted for under equity method.

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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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Amount of liability recognized arising from contingent consideration in a business combination.

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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 as of the balance sheet date of the embedded derivative or group of embedded derivatives classified as an asset.

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Fair value as of the balance sheet date of the embedded derivative or group of embedded derivatives classified as a liability.

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Fair value portion of asset contracts related to the exchange of different currencies, including, but not limited to, foreign currency options, forward contracts, and swaps.

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Fair value portion of liability contracts related to the exchange of different currencies, including, but not limited to, foreign currency options, forward (delivery or nondelivery) contracts, and swaps entered into.

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Fair value portion of investment securities, including, but not limited to, marketable securities, derivative financial instruments, and investments accounted for under the equity method.

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Fair value of financial and nonfinancial obligations.

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The fair value amount of long-term debt whether such amount is presented as a separate caption or as a parenthetical disclosure. Additionally, this element may be used in connection with the fair value disclosures required in the footnote disclosures to the financial statements. The element may be used in both the balance sheet and disclosure in the same submission.

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Fair value as of the balance sheet date of price risk derivative assets, which includes all such derivative instruments in hedging and nonhedging relationships that are recognized as assets on the balance sheet.

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