GOODWILL AND OTHER INTANGIBLE ASSETS - Carrying Values of Other Intangible Assets (Detail) - USD ($) $ in Millions	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Intangible Assets By Major Class [Line Items]
Gross Carrying Amount	$ 2,184.0	$ 2,133.6
Accumulated Amortization	392.5	271.6
Net Value	1,791.5	1,862.0	$ 1,842.6
Operating permits
Intangible Assets By Major Class [Line Items]
Carrying Amount, Indefinite Lived Intangible Assets	222.3	229.4
Tradenames
Intangible Assets By Major Class [Line Items]
Carrying Amount, Indefinite Lived Intangible Assets	317.4	316.5
Customer relationships
Intangible Assets By Major Class [Line Items]
Gross Carrying Amount	1,613.4	1,553.4
Accumulated Amortization	381.4	261.3
Net Value	1,232.0	1,292.1
Covenants not-to-compete
Intangible Assets By Major Class [Line Items]
Gross Carrying Amount	7.9	9.5
Accumulated Amortization	5.9	6.4
Net Value	2.0	3.1
Tradenames
Intangible Assets By Major Class [Line Items]
Gross Carrying Amount	6.0	5.7
Accumulated Amortization	1.8	1.4
Net Value	4.2	4.3
Other
Intangible Assets By Major Class [Line Items]
Gross Carrying Amount	17.0	19.1
Accumulated Amortization	3.4	2.5
Net Value	$ 13.6	$ 16.6