INCOME TAXES - Additional Information (Detail) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017		Dec. 31, 2016
Income Tax Disclosure [Line Items]
Provision (benefit) for income taxes	$ 2.2	$ 21.8	[1]
Change in benefit from income taxes	(19.6)
Non-cash charge from change in statutory rate		47.9
Tax benefit from decrease in deferred tax liabilities	7.7
Deferred tax valuation allowance increase (decrease)	75.0	9.3
Tax loss carryforwards	835.3
Tax loss carryforwards - expiring 2019	1.2
Tax loss carryforwards - expiring 2020	1.0
Tax loss carryforwards - expiring 2021	0.2
Tax loss carryforwards - expiring 2022 and beyond	564.7
Tax loss carryforwards - unlimited	268.2
Unrecognized tax benefits	74.7	84.9		$ 93.3
Income tax penalties and interest accrued	9.8	9.0		$ 10.6
Unrecognized tax benefits that would impact effective tax rate	33.5
Tax deferred expense	41.2
Income tax benefit from unrecognized tax benefits	(0.8)	(1.6)
Decrease in unrecognized tax benefits is reasonably possible	5.7
Foreign
Income Tax Disclosure [Line Items]
Tax loss carryforwards	284.3
United States
Income Tax Disclosure [Line Items]
Tax loss carryforwards	551.0
Tax Payment
Income Tax Disclosure [Line Items]
Due to related parties, current	1.1
Due to related parties, noncurrent	$ 0.7
Tax Years Before 2017
Income Tax Disclosure [Line Items]
Non-cash charge from change in statutory rate		30.3
Tax Year 2017
Income Tax Disclosure [Line Items]
Non-cash charge from change in statutory rate		$ 17.6

[1] Adjusted as a result of the adoption of certain accounting pronouncements during 2018. See Note 1, "Description of Business and Summary of Significant Accounting Policies - Recently Adopted Accounting Pronouncements," for details of these adjustments.