RECEIVABLES - Roll-forward of allowance for credit losses (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022
Trade receivables
Allowance for credit losses at December 31, 2022	$ 34.1	$ 38.1
Current period provision (release) for expected credit losses	1.3	0.7
Recoveries	(1.0)	(4.7)
Allowance for credit losses at December 31, 2023	34.4	34.1
Contract assets
Allowance for credit losses at December 31, 2022	1.1	1.1
Current period provision (release) for expected credit losses	0.3	0.0
Recoveries	0.0	0.0
Allowance for credit losses at December 31, 2023	1.4	1.1
Loans receivables and other
Allowance for credit losses at December 31, 2022	0.3	0.6
Current period provision (release) for expected credit losses	2.0	(0.3)
Recoveries	0.0	0.0
Allowance for credit losses at December 31, 2023	2.3	0.3
Held-to-maturity debt securities
Allowance for credit losses at December 31, 2022	0.2	2.7
Current period provision (release) for expected credit losses	(0.2)	(2.5)
Recoveries	0.0	0.0
Allowance for credit losses at December 31, 2023	$ 0.0	$ 0.2