INCOME TAXES - Provision for (benefit from) income taxes (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
(Benefit from) provision for income taxes from continuing operations
Tax at statutory U.S. federal income tax rate	$ 121.7	$ 77.0	$ 55.4
State taxes	0.8	2.4	2.7
Change in valuation allowance	(2.6)	(21.0)	(9.0)
Foreign tax differential on income/losses of foreign subsidiaries	(25.7)	(10.2)	(12.0)
U.S. tax on multi-national operations	12.8	10.1	8.1
Change in foreign tax rates	0.4	0.0	(0.6)
Swiss cantonal tax attribute	(42.3)	0.0	0.0
Research and development	(1.7)	(1.0)	(0.8)
Provision to return adjustments	(2.7)	6.8	0.5
Compensation	2.9	2.1	1.8
Other	(0.6)	0.2	0.2
Total provision for (benefit from) income taxes	$ 63.0	$ 66.4	$ 46.3