RECEIVABLES - Roll-forward of allowance for credit losses (Details) - USD ($) $ in Millions	9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021
Trade receivables
Allowance for credit losses at December 31, 2021	$ 38.1	$ 40.2
Current period provision (release) for expected credit losses	0.0	(0.7)
Recoveries	(2.2)	(1.2)
Allowance for credit losses at September 30, 2022	35.9	38.3
Contract assets
Allowance for credit losses at December 31, 2021	1.1	2.4
Current period provision (release) for expected credit losses	0.1	(0.5)
Recoveries	0.0	(0.7)
Allowance for credit losses at September 30, 2022	1.2	1.2
Loans receivable and other
Allowance for credit losses at December 31, 2021	0.6	7.9
Current period provision (release) for expected credit losses	(0.1)	(0.2)
Recoveries	0.0	0.0
Allowance for credit losses at September 30, 2022	0.5	7.7
Held-to-maturity debt securities
Allowance for credit losses at December 31, 2021	2.7	0.5
Current period provision (release) for expected credit losses	(1.5)	2.2
Recoveries	0.0	0.0
Allowance for credit losses at September 30, 2022	$ 1.2	$ 2.7