Fair Value of Derivative Instruments (Detail) - USD ($) $ in Millions	Mar. 31, 2016	Dec. 31, 2015
Derivatives Fair Value [Line Items]
Derivatives assets	$ 34.4	$ 12.6
Derivatives liabilities	469.3	446.9
Net Investment Hedging [Member] | Long Term Debt [Member]
Derivatives Fair Value [Line Items]
Derivatives liabilities	455.8	434.5
Derivatives Designated as Accounting Hedges [Member]
Derivatives Fair Value [Line Items]
Derivatives assets	32.6	12.5
Derivatives liabilities	12.5	1.5
Derivatives Designated as Accounting Hedges [Member] | Interest Rate Swap [Member] | Other Assets [Member]
Derivatives Fair Value [Line Items]
Derivatives assets	32.3	12.1
Derivatives Designated as Accounting Hedges [Member] | Interest Rate Swap [Member] | Other Noncurrent Liabilities [Member]
Derivatives Fair Value [Line Items]
Derivatives liabilities		0.3
Derivatives Designated as Accounting Hedges [Member] | Cross-Currency Swap [Member] | Other Noncurrent Liabilities [Member]
Derivatives Fair Value [Line Items]
Derivatives liabilities	0.4
Derivatives Designated as Accounting Hedges [Member] | Net Investment Hedging [Member] | Foreign Exchange Contract [Member] | Other Current Assets [Member]
Derivatives Fair Value [Line Items]
Derivatives assets	0.3	0.4
Derivatives Designated as Accounting Hedges [Member] | Net Investment Hedging [Member] | Foreign Exchange Contract [Member] | Accounts Payable And Accrued Liabilities [Member]
Derivatives Fair Value [Line Items]
Derivatives liabilities	12.1	1.2
Derivatives Not Designated as Accounting Hedges [Member] | Foreign Exchange Contract [Member] | Other Current Assets [Member]
Derivatives Fair Value [Line Items]
Derivatives assets	1.8	0.1
Derivatives Not Designated as Accounting Hedges [Member] | Foreign Exchange Contract [Member] | Accounts Payable And Accrued Liabilities [Member]
Derivatives Fair Value [Line Items]
Derivatives liabilities	$ 1.0	1.9
Derivatives Not Designated as Accounting Hedges [Member] | Cross-Currency Swap [Member] | Other Noncurrent Liabilities [Member]
Derivatives Fair Value [Line Items]
Derivatives liabilities		$ 9.0