Fair Value of Derivative Instruments (Detail) - USD ($) $ in Millions	Dec. 31, 2015	Dec. 31, 2014
Derivatives Fair Value [Line Items]
Derivatives assets	$ 12.6	$ 41.8
Derivatives liabilities	444.8	2.1
Derivatives Designated as Accounting Hedges [Member]
Derivatives Fair Value [Line Items]
Derivatives assets	12.5	36.2
Derivatives liabilities	1.5
Derivatives Designated as Accounting Hedges [Member] | Interest Rate Swap [Member] | Other Assets [Member]
Derivatives Fair Value [Line Items]
Derivatives assets	12.1	17.4
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] | Foreign Exchange Contract [Member] | Other Current Assets [Member]
Derivatives Fair Value [Line Items]
Derivatives assets		18.8
Derivatives Not Designated as Accounting Hedges [Member] | Foreign Exchange Contract [Member] | Other Current Assets [Member]
Derivatives Fair Value [Line Items]
Derivatives assets	0.1	5.6
Derivatives Not Designated as Accounting Hedges [Member] | Foreign Exchange Contract [Member] | Accounts Payable and Accrued Liabilities [Member]
Derivatives Fair Value [Line Items]
Derivatives liabilities	1.9	$ 2.1
Derivatives Not Designated as Accounting Hedges [Member] | Cross-Currency Swap [Member] | Other Noncurrent Liabilities [Member]
Derivatives Fair Value [Line Items]
Derivatives liabilities	9.0
Net Investment Hedging [Member] | Derivatives Designated as Accounting Hedges [Member] | Long-Term Debt [Member]
Derivatives Fair Value [Line Items]
Derivatives liabilities	434.5
Net Investment Hedging [Member] | Derivatives Designated as Accounting Hedges [Member] | Foreign Exchange Contract [Member] | Other Current Assets [Member]
Derivatives Fair Value [Line Items]
Derivatives assets	0.4
Net Investment Hedging [Member] | Derivatives Designated as Accounting Hedges [Member] | Foreign Exchange Contract [Member] | Accounts Payable and Accrued Liabilities [Member]
Derivatives Fair Value [Line Items]
Derivatives liabilities	$ 1.2