Financial Instruments Carried at Fair Value on Recurring Basis (Detail) (USD $) In Millions, unless otherwise specified	Mar. 31, 2014	Dec. 31, 2013
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Derivative Contracts	$ 11.9	$ 20.5
Total, Assets	11.9	20.5
Derivatives, Liabilities	1.5	1.7
Contingent consideration arising from acquisitions, liabilities	17.2	17.5
Total, Liabilities	18.7	19.2
Fair Value Inputs Level 2 [Member]
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Derivative Contracts	11.9	20.5
Total, Assets	11.9	20.5
Derivatives, Liabilities	1.5	1.7
Contingent consideration arising from acquisitions, liabilities	0	0
Total, Liabilities	1.5	1.7
Fair Value Inputs Level 3 [Member]
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Derivative Contracts	0	0
Total, Assets	0	0
Derivatives, Liabilities	0	0
Contingent consideration arising from acquisitions, liabilities	17.2	17.5
Total, Liabilities	17.2	17.5
Fair Value Inputs Level 1 [Member]
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Derivative Contracts	0	0
Total, Assets	0	0
Derivatives, Liabilities	0	0
Contingent consideration arising from acquisitions, liabilities	0	0
Total, Liabilities	$ 0	$ 0