RECEIVABLES - Roll-forward of allowance for credit losses (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021
Trade receivables
Allowance for credit losses at December 31, 2021	$ 38.1	$ 40.2
Current period provision (release) for expected credit losses	0.7	3.5
Recoveries	(4.7)	(5.6)
Allowance for credit losses at December 31, 2022	34.1	38.1
Contract assets
Allowance for credit losses at December 31, 2021	1.1	2.4
Current period provision (release) for expected credit losses	0.0	(1.3)
Recoveries	0.0	0.0
Allowance for credit losses at December 31, 2022	1.1	1.1
Loans receivables and other
Allowance for credit losses at December 31, 2021	0.6	7.9
Current period provision (release) for expected credit losses	(0.3)	(7.3)
Recoveries	0.0	0.0
Allowance for credit losses at December 31, 2022	0.3	0.6
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	(2.5)	2.2
Recoveries	0.0	0.0
Allowance for credit losses at December 31, 2022	$ 0.2	$ 2.7