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INCOME TAXES - Reconciliation of uncertain tax positions (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
INCOME TAXES
Uncertain tax positions, beginning balance	$ 138.6	$ 116.7	$ 102.3
Gross increases on tax positions in prior period	3.4	3.3	3.1
Gross decreases on tax positions in prior period	(0.2)		(6.3)
Gross increases on tax positions in current period	26.5	24.3	18.5
Lapse of statute of limitations	(6.2)	(5.7)	(0.9)
Uncertain tax positions, ending balance	$ 162.1	$ 138.6	$ 116.7

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Amount of unrecognized tax benefits.

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-Publisher FASB
-Name Accounting Standards Codification
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Amount of increase in unrecognized tax benefits resulting from tax positions that have been or will be taken in current period tax return.

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