Income Taxes - Summary of Changes in Gross Unrecognized Tax Benefits (Details) - USD ($) $ in Millions	12 Months Ended
Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Gross Unrecognized Tax Benefits
Balance at beginning of period	$ 36.4	$ 31.6	$ 36.7
Additions (reductions) based on tax positions related to current year	7.7	4.9
Additions (reductions) based on tax positions related to current year			(0.3)
Additions (reductions) based on tax positions related to prior years	(4.0)
Additions (reductions) based on tax positions related to prior years		3.6	2.0
Settlements	(0.3)	(1.2)	(3.7)
Statute expirations	(5.2)	(4.7)	(2.8)
Foreign currency translation	0.3	2.2
Foreign currency translation			(0.3)
Balance at end of period	$ 34.9	$ 36.4	$ 31.6

A roll forward is a reconciliation of a concept from the beginning of a period to the end of a period.

No definition available.

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Amount of unrecognized tax benefits.

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Amount of decrease in unrecognized tax benefits resulting from tax positions that have been or will be taken in current period tax return.

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