ACCOUNTING POLICIES - Allowances (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020
Allowances
Allowance for credit losses on trade accounts receivable	$ 8.8	$ 3.6
Increase in amount of allowance for credit losses, including allowance assumed in business acquisition	8.0
Amount of allowance for credit losses assumed in acquisition	6.5
Write-offs, net of recoveries	$ 2.8