SEGMENT REPORTING - Reconciliation of Company's Primary Measure of Segment Profitability (EBITDA) to (Loss) Income from Operations (Detail) - USD ($) $ in Millions	12 Months Ended
Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Segment Reporting [Abstract]
Total reportable segment Adjusted EBITDA	$ 744.6	$ 812.0	$ 850.8
Depreciation	(125.6)	(131.1)	(123.2)
Business Transformation	(82.6)	(31.3)
Intangible Amortization	(130.3)	(118.4)	(129.3)
Acquisition and Integration	(9.8)	(40.7)	(60.9)
Operational Optimization	(29.4)	(71.1)	(59.1)
Divestitures	(20.5)	(9.5)	(27.1)
Litigation, Settlements and Regulatory Compliance	(93.2)	(327.7)	(7.2)
Impairment	(385.2)	(65.0)
Impairment			(1.4)
Other	(29.1)	(24.8)	(8.8)
(Loss) Income from operations	$ (161.1)	$ (7.6)	$ 433.8

Adjusted earnings before interest taxes depreciation and amortization (EBITDA).

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Business combination acquisition and integration related costs.

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Expenses (Income) related to divestitures.

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Litigation settlement and regulatory compliance.

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Amount of expenses associated with operational optimization.

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The aggregate expense charged against earnings to allocate the cost of intangible assets (nonphysical assets not used in production) in a systematic and rational manner to the periods expected to benefit from such assets. As a noncash expense, this element is added back to net income when calculating cash provided by or used in operations using the indirect method.

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Amount of expenses associated with exit or disposal activities pursuant to an authorized plan. Includes, but is not limited to, one-time termination benefits, termination of an operating lease or other contract, consolidating or closing facilities, and relocating employees, and termination benefits associated with an ongoing benefit arrangement. Excludes expenses associated with special or contractual termination benefits, a discontinued operation or an asset retirement obligation.

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The amount of expense recognized in the current period that reflects the allocation of the cost of tangible assets over the assets' useful lives. Includes production and non-production related depreciation.

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Total loss recognized during the period from the impairment of goodwill plus the loss recognized in the period resulting from the impairment of the carrying amount of intangible assets, other than goodwill.

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Amount of impairment loss resulting from write-down of assets, excluding financial assets and goodwill, lacking physical substance and having a projected indefinite period of benefit to fair value.

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The net result for the period of deducting operating expenses from operating revenues.

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Amount of expense classified as other.

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