GOODWILL AND OTHER INTANGIBLE ASSETS - Intangible Assets (Detail) - USD ($) $ in Millions	Jun. 30, 2019	Dec. 31, 2018
Intangible Assets By Major Class [Line Items]
Gross Carrying Amount	$ 2,135.5	$ 2,137.6
Accumulated Amortization	572.7	499.9
Net Value	1,562.8	1,637.7
Operating permits
Intangible Assets By Major Class [Line Items]
Carrying Amount, Indefinite Lived Intangible Assets	211.5	212.5
Tradenames
Intangible Assets By Major Class [Line Items]
Carrying Amount, Indefinite Lived Intangible Assets	313.0	312.3
Customer relationships
Intangible Assets By Major Class [Line Items]
Gross Carrying Amount	1,589.5	1,591.5
Accumulated Amortization	563.9	492.0
Net Value	1,025.6	1,099.5
Covenants not-to-compete
Intangible Assets By Major Class [Line Items]
Gross Carrying Amount	5.1	5.1
Accumulated Amortization	3.6	3.2
Net Value	1.5	1.9
Tradenames
Intangible Assets By Major Class [Line Items]
Gross Carrying Amount	4.1	3.9
Accumulated Amortization	1.2	1.2
Net Value	2.9	2.7
Other
Intangible Assets By Major Class [Line Items]
Gross Carrying Amount	12.3	12.3
Accumulated Amortization	4.0	3.5
Net Value	$ 8.3	$ 8.8