GOODWILL AND OTHER INTANGIBLE ASSETS - Additional Information (Detail) - USD ($) $ in Millions	3 Months Ended		12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Intangible Assets By Major Class [Line Items]
Goodwill impairment	$ 358.7	$ 65.0	$ 358.7	$ 65.0
Goodwill	$ 3,222.2	$ 3,604.0	3,222.2	3,604.0	$ 3,591.0
Assets impairment charges			16.0	21.0	1.4
Aggregate intangible amortization expense			130.3	118.4	$ 129.3
Customer Relationship and Permit Intangibles
Intangible Assets By Major Class [Line Items]
Assets impairment charges			10.3
Customer relationships | Minimum
Intangible Assets By Major Class [Line Items]
Percentage of increase in annual amortization expense	5.00%
Customer relationships | Maximum
Intangible Assets By Major Class [Line Items]
Percentage of increase in annual amortization expense	10.00%
Domestic CRS [Membe]
Intangible Assets By Major Class [Line Items]
Goodwill impairment			286.3
Latin America [Member]
Intangible Assets By Major Class [Line Items]
Goodwill impairment			72.4	$ 65.0
Goodwill	$ 20.0		$ 20.0