Fair Value of Derivative Instruments (Detail) - USD ($) $ in Millions	Sep. 30, 2015	Dec. 31, 2014
Derivatives Fair Value [Line Items]
Derivatives assets	$ 44.9	$ 41.8
Derivatives liabilities	453.1	2.1
Designated As Hedging Instrument [Member]
Derivatives Fair Value [Line Items]
Derivatives assets	43.2	36.2
Designated As Hedging Instrument [Member] | Net Investment Hedging [Member] | Long Term Debt [Member]
Derivatives Fair Value [Line Items]
Derivatives liabilities	446.5
Designated As Hedging Instrument [Member] | Interest Rate Swap [Member] | Other Assets [Member]
Derivatives Fair Value [Line Items]
Derivatives assets	25.5	17.4
Designated As Hedging Instrument [Member] | Foreign Exchange Contract [Member] | Net Investment Hedging [Member] | Other Current Assets [Member]
Derivatives Fair Value [Line Items]
Derivatives assets	17.7	18.8
Nondesignated [Member] | Foreign Exchange Contract [Member] | Other Current Assets [Member]
Derivatives Fair Value [Line Items]
Derivatives assets	1.7	5.6
Nondesignated [Member] | Foreign Exchange Contract [Member] | Accounts Payable And Accrued Liabilities [Member]
Derivatives Fair Value [Line Items]
Derivatives liabilities	1.0	$ 2.1
Nondesignated [Member] | Cross-Currency Swap [Member] | Other Noncurrent Liabilities [Member]
Derivatives Fair Value [Line Items]
Derivatives liabilities	$ 5.6