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Fair Value Measurements - Narrative (Details) - USD ($) $ in Millions	Dec. 31, 2020	Dec. 31, 2019
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Acquisition-related future consideration liabilities	$ 12.9
Acquisition-related future consideration liabilities recorded in other current liabilities	8.4
Acquisition-related future consideration liabilities recorded in other long-term liabilities	4.5
Mutual Fund | NAV
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Other financial assets	6.9	$ 3.7
Money Market
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Cash and cash equivalents	$ 244.3	$ 222.1

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

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