Financial Instruments Carried at Fair Value on Recurring Basis (Detail) (USD $) In Millions, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Derivatives, assets	$ 20.5	$ 15.2
Total, assets	20.5	15.2
Derivatives, liabilities	1.7	2.4
Contingent consideration arising from acquisitions, liabilities	17.5	9.0
Total, liabilities	19.2	11.4
Level 2
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Derivatives, assets	20.5	15.2
Total, assets	20.5	15.2
Derivatives, liabilities	1.7	2.4
Contingent consideration arising from acquisitions, liabilities	0	0
Total, liabilities	1.7	2.4
Level 3
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Derivatives, assets	0	0
Total, assets	0	0
Derivatives, liabilities	0	0
Contingent consideration arising from acquisitions, liabilities	17.5	9.0
Total, liabilities	17.5	9.0
Level 1
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Derivatives, assets	0	0
Total, assets	0	0
Derivatives, liabilities	0	0
Contingent consideration arising from acquisitions, liabilities	0	0
Total, liabilities	$ 0	$ 0