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Intangible Assets, Goodwill and Other (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020	Dec. 31, 2020
Business Acquisition [Line Items]
Deferred payments and contingent consideration related to business combinations and asset acquisitions			$ 7.8	$ 4.1
Goodwill	$ 344.3		344.3		$ 336.7
Amortization of intangible assets	$ 7.5	$ 12.4	$ 14.5	$ 24.7

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- Definition

Business Combination, Consideration Transferred, Present Value of Future Cash Payments

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The aggregate expense charged against earnings to allocate the cost of intangible assets (nonphysical assets not used in production) in a systematic and rational manner to the periods expected to benefit from such assets. As a noncash expense, this element is added back to net income when calculating cash provided by or used in operations using the indirect method.

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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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Amount after accumulated impairment loss of an asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized.

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