BUSINESS COMBINATIONS - HydroChemPSC (Details) - HydroChemPSC		3 Months Ended
	Oct. 08, 2021 USD ($) employee service_location	Dec. 31, 2021 USD ($)
Business Acquisition [Line Items]
Annual revenues reported by acquired entity in 2020	$ 715,300,000
Purchase price	1,230,000,000
Integration related costs		$ 6,000,000
Other intangibles	289,000,000
Revenue of acquiree since acquisition date, actual		166,100,000
Operation expenses of acquiree since acquisition date, actual		166,400,000
Depreciation and amortization		$ 12,300,000
Customer Relationships
Business Acquisition [Line Items]
Finite-lived intangible assets acquired	$ 215,000,000
Finite-lived intangible asset, useful life (in years)	25 years
Developed Technology
Business Acquisition [Line Items]
Finite-lived intangible assets acquired	$ 65,000,000
Finite-lived intangible asset, useful life (in years)	10 years
Trademarks and Trade Names
Business Acquisition [Line Items]
Finite-lived intangible assets acquired	$ 9,000,000
Finite-lived intangible asset, useful life (in years)	2 years
Secured senior term loans due October 8, 2028 ("2028 Term Loans") | Secured debt
Business Acquisition [Line Items]
Aggregate principal amount	$ 1,000,000,000
HydroChemPSC
Business Acquisition [Line Items]
Entity number of employees | employee	4,500
Number of service locations (more than) | service_location	240