PENSION AND NON-PENSION POST-EMPLOYMENT BENEFIT PLANS - Schedule of Benefit Plan Balance (Details) - USD ($) $ in Millions	Dec. 31, 2024	Dec. 31, 2023
Defined Benefit Plan Disclosure [Line Items]
Pension and non-pension post-employment benefit obligations	$ (83.8)	$ (83.9)
Current other post-employment benefit obligations	(4.0)	(4.2)
Non-current net pension assets (note 9)	10.0	7.9
Defined benefit plan, asset (liability) recognized on consolidated balance sheets	(77.8)	(80.2)
Pension Plans
Defined Benefit Plan Disclosure [Line Items]
Pension and non-pension post-employment benefit obligations	(17.6)	(16.0)
Non-current net pension assets (note 9)	10.0	7.9
Defined benefit plan, asset (liability) recognized on consolidated balance sheets	(7.6)	(8.1)
Other Benefits Plans
Defined Benefit Plan Disclosure [Line Items]
Pension and non-pension post-employment benefit obligations	(66.2)	(67.9)
Current other post-employment benefit obligations	(4.0)	(4.2)
Defined benefit plan, asset (liability) recognized on consolidated balance sheets	$ (70.2)	$ (72.1)