RESTRUCTURING COSTS - Restructuring Costs Recorded In Consolidated Statements Of Operations And Comprehensive Income (Loss) (Details) - General and administrative - USD ($) $ in Millions	3 Months Ended		9 Months Ended		33 Months Ended
	Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2024
Restructuring Cost and Reserve [Line Items]
Total restructuring costs	$ 0.0	$ 1.9	$ 0.1	$ 9.4	$ 29.9
Employee costs
Restructuring Cost and Reserve [Line Items]
Total restructuring costs	0.0	1.8	0.1	5.9	23.3
Real estate exit costs
Restructuring Cost and Reserve [Line Items]
Total restructuring costs	0.0	0.0	0.0	0.0	2.1
Other costs
Restructuring Cost and Reserve [Line Items]
Total restructuring costs	$ 0.0	$ 0.1	$ 0.0	$ 3.5	$ 4.5