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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
Reconciliation of Unrecognized Tax Benefits, Excluding Amounts Pertaining to Examined Tax Returns
Uncertain gross tax positions, beginning balance	$ 281.8	$ 203.1	$ 150.7
Current year tax positions	82.1	86.4	55.4
Increase in prior year tax positions	2.3	6.0	0.8
Decrease in prior year tax positions	(4.8)	(10.0)	(3.8)
Settlements	(0.3)	(3.7)	0.0
Lapse of statutes of limitations	(2.7)	0.0	0.0
Uncertain gross tax positions, ending balance	$ 358.4	$ 281.8	$ 203.1

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- Definition

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

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Amount of unrecognized tax benefits.

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-Publisher FASB
-Name Accounting Standards Codification
-Topic 740
-SubTopic 10
-Section 45
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Amount of decrease in unrecognized tax benefits resulting from tax positions taken in prior period tax returns.

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Amount of decrease in unrecognized tax benefits resulting from settlements with taxing authorities.

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Amount of decrease in unrecognized tax benefits resulting from lapses of applicable statutes of limitations.

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