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Debt outstanding (Detail) $ in Millions	3 Months Ended	6 Months Ended
	Jun. 30, 2016 USD ($)	Jun. 30, 2016 USD ($)	May 31, 2016 USD ($)	Mar. 31, 2016 USD ($)	Dec. 31, 2015 USD ($)	Jul. 15, 2015 USD ($)
Debt Instrument [Line Items]
Total debt	$ 2,401.1	$ 2,401.1			$ 2,204.6
Less short-term debt and current portion of long-term debt	(50.8)	(50.8)			(43.9)
Total long-term debt	$ 2,350.3	$ 2,350.3			2,160.7
Incremental Borrowings Net Leverage Ratio	4.25	4.25
Senior secured term loan
Debt Instrument [Line Items]
Total debt	$ 1,993.6	$ 1,993.6			1,855.6
Senior Secured Term Loan A [Member]
Debt Instrument [Line Items]
Debt Instrument, Face Amount			$ 55.0			$ 350.0
Total debt	385.7	385.7			340.4
Senior Secured Revolving Line Of Credit [Member]
Debt Instrument [Line Items]
Total debt	0.0	0.0
Line of Credit Facility, Maximum Borrowing Capacity	210.0	210.0
Notes Payable, Other Payables [Member]
Debt Instrument [Line Items]
Total debt	20.1	20.1			6.2
Capital lease obligations
Debt Instrument [Line Items]
Total debt	1.7	1.7			$ 2.4
Credit Facility [Member]
Debt Instrument [Line Items]
Debt Instrument, Face Amount				$ 150.0
Debt Instrument, Unused Borrowing Capacity, Amount	450.0	450.0
Interest Rate Cap [Member]
Debt Instrument [Line Items]
Other Comprehensive Income (Loss), Derivatives Qualifying as Hedges, Net of Tax	7.1	21.9
Derivative, Net Hedge Ineffectiveness Gain (Loss)	$ 0.3	$ 1.0

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Sum of the carrying values as of the balance sheet date of all debt, including all short-term borrowings, long-term debt, and capital lease obligations.

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