GOODWILL AND OTHER INTANGIBLE ASSETS - Intangible Assets (Detail) - USD ($) $ in Millions	Jun. 30, 2020	Dec. 31, 2019
Intangible Assets By Major Class [Line Items]
Gross Carrying Amount	$ 1,744.7	$ 2,007.3
Accumulated Amortization	584.0	584.9
Net Value	1,160.7	1,422.4
Operating permits
Intangible Assets By Major Class [Line Items]
Carrying Amount, Indefinite Lived Intangible Assets	86.8	211.1
Tradenames
Intangible Assets By Major Class [Line Items]
Carrying Amount, Indefinite Lived Intangible Assets	310.3	314.2
Customer relationships
Intangible Assets By Major Class [Line Items]
Gross Carrying Amount	1,326.0	1,460.8
Accumulated Amortization	572.7	575.8
Net Value	753.3	885.0
Covenants not-to-compete
Intangible Assets By Major Class [Line Items]
Gross Carrying Amount	3.5	4.9
Accumulated Amortization	2.8	3.8
Net Value	0.7	1.1
Tradenames
Intangible Assets By Major Class [Line Items]
Gross Carrying Amount	3.5	4.1
Accumulated Amortization	1.1	1.6
Net Value	2.4	2.5
Operating permits
Intangible Assets By Major Class [Line Items]
Gross Carrying Amount	5.9	3.6
Accumulated Amortization	4.4	1.1
Net Value	1.5	2.5
Other
Intangible Assets By Major Class [Line Items]
Gross Carrying Amount	8.7	8.6
Accumulated Amortization	3.0	2.6
Net Value	$ 5.7	$ 6.0