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SUBSEQUENT EVENTS - Narrative (Details) - USD ($) $ in Millions		3 Months Ended
	Jan. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Subsequent Event [Line Items]
Amount of remaining performance obligation		$ 723.5
Shares of common stock repurchased (in shares)		2,500,000	0
Aggregate cost of repurchased shares		$ 60.4
International Solutions
Subsequent Event [Line Items]
Amount of remaining performance obligation		$ 22.0
Subsequent Event
Subsequent Event [Line Items]
Shares of common stock repurchased (in shares)	600,000
Aggregate cost of repurchased shares	$ 16.4
Number of common shares authorized to be repurchased (up to) (in shares)	4,000,000

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