SHARE-BASED COMPENSATION - Schedule of Compensation Expense (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Time-based restricted stock
Share-based Payment Arrangement, Expensed and Capitalized, Amount [Line Items]
Allocated share-based compensation expense	$ 9.2
Selling, general and administrative expenses
Share-based Payment Arrangement, Expensed and Capitalized, Amount [Line Items]
Allocated share-based compensation expense	31.2	$ 34.4	$ 22.2
Selling, general and administrative expenses | Time-based stock options
Share-based Payment Arrangement, Expensed and Capitalized, Amount [Line Items]
Allocated share-based compensation expense	0.4	1.1	1.4
Selling, general and administrative expenses | Time-based restricted stock
Share-based Payment Arrangement, Expensed and Capitalized, Amount [Line Items]
Allocated share-based compensation expense	30.4	33.0	20.6
Selling, general and administrative expenses | ESPP
Share-based Payment Arrangement, Expensed and Capitalized, Amount [Line Items]
Allocated share-based compensation expense	$ 0.4	$ 0.3	$ 0.2