Fair Value of Derivative Instruments (Detail) (USD $) In Millions, unless otherwise specified	Sep. 30, 2014	Dec. 31, 2013
Derivatives Fair Value [Line Items]
Derivatives assets	$ 24.8	$ 20.5
Derivatives liabilities	8.5	1.7
Designated As Hedging Instrument [Member]
Derivatives Fair Value [Line Items]
Derivatives assets	20.2	19.6
Designated As Hedging Instrument [Member] | Interest Rate Swap [Member] | Other Assets [Member]
Derivatives Fair Value [Line Items]
Derivatives assets		10.3
Designated As Hedging Instrument [Member] | Foreign Exchange Contract [Member] | Net Investment Hedging [Member] | Other Current Assets [Member]
Derivatives Fair Value [Line Items]
Derivatives assets	20.2	9.3
Designated As Hedging Instrument [Member] | Foreign Exchange Contract [Member] | Net Investment Hedging [Member] | Accounts Payable And Accrued Liabilities [Member]
Derivatives Fair Value [Line Items]
Derivatives liabilities	0	1.0
Nondesignated [Member] | Foreign Exchange Contract [Member] | Other Current Assets [Member]
Derivatives Fair Value [Line Items]
Derivatives assets	4.6	0.9
Nondesignated [Member] | Foreign Exchange Contract [Member] | Accounts Payable And Accrued Liabilities [Member]
Derivatives Fair Value [Line Items]
Derivatives liabilities	$ 5.1	$ 0.7