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Goodwill (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Change in the carrying amount of goodwill
Balance at the beginning of the period	$ 1,935.2	$ 2,003.8	$ 1,870.8
Acquisitions	172.0	6.9	131.8
Purchase price allocation adjustments		(77.2)	(1.9)
Foreign currency translation gain	0.4	1.7	3.1
Balance at the end of the period	2,107.6	1,935.2	$ 2,003.8
Accumulated impairment losses	$ 0.0	$ 0.0

X

- Definition

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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Amount of foreign currency translation gain (loss) which increases (decreases) an asset representing future economic benefits from other assets acquired in a business combination that are not individually identified and separately recognized.

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Amount of accumulated impairment loss for 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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Amount of increase (decrease) from adjustments after acquisition date under purchase accounting of an asset representing the future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized.

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