RESTRUCTURING, DIVESTITURES, AND ASSETS HELD FOR SALE - Additional Information (Detail) $ in Millions	3 Months Ended								12 Months Ended
	Dec. 31, 2017 USD ($)	Sep. 30, 2017 USD ($)	Jun. 30, 2017 USD ($)	Mar. 31, 2017 USD ($)	Dec. 31, 2016 USD ($)	Sep. 30, 2016 USD ($)	Jun. 30, 2016 USD ($)	Mar. 31, 2016 USD ($)	Dec. 31, 2017 USD ($)	Dec. 31, 2016 USD ($)	Dec. 31, 2015 USD ($) Divestiture
Restructuring Cost And Reserve [Line Items]
Restructuring expenses									$ 13.9
Non-cash impairment charges									21.0	$ 1.4	$ 4.2
Proceeds from sale of certain assets									2.5	2.1
Number of divestitures | Divestiture											0
Non-cash impairment of long lived assets held for sale					$ 0.0				7.3		$ 3.9
South Africa | Disposal Group, Disposed of by Sale, Not Discontinued Operations
Restructuring Cost And Reserve [Line Items]
Proceeds from sale of certain assets	$ 7.3
United Kingdom | Disposal Group, Disposed of by Sale, Not Discontinued Operations
Restructuring Cost And Reserve [Line Items]
Proceeds from sale of certain assets			$ 1.2		0.8
Business Transformation
Restructuring Cost And Reserve [Line Items]
Restructuring expenses	27.1	$ 4.2	0.0	$ 0.0		$ 0.0	$ 0.0	$ 0.0	31.3
Current restructuring liability	2.2								2.2
Selling, General and Administrative Expenses
Restructuring Cost And Reserve [Line Items]
Employee termination									11.5
Non-cash impairment charges									2.4
Selling, General and Administrative Expenses | Assets and Liabilities Held for Sale, Not Discontinued Operations
Restructuring Cost And Reserve [Line Items]
Non-cash impairment of long lived assets held for sale									$ 6.8	$ 25.5
Selling, General and Administrative Expenses | South Africa | Disposal Group, Disposed of by Sale, Not Discontinued Operations
Restructuring Cost And Reserve [Line Items]
Non-taxable gain from sale	$ 3.0
Selling, General and Administrative Expenses | United Kingdom | Disposal Group, Disposed of by Sale, Not Discontinued Operations
Restructuring Cost And Reserve [Line Items]
Pretax loss from sale			5.7		1.6
Loss from sale, net of tax			$ 4.6		$ 1.3