Derivatives and Financial Instruments - Assets and Liabilities Measured at Fair Value (Detail) - USD ($) $ in Millions	Jun. 30, 2016	Dec. 31, 2015
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Goodwill	$ 5,231.5	$ 5,255.4
Fair Value, Measurements, Recurring
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Foreign currency contract assets	2.1	0.1
Foreign Currency Contracts, Liability, Fair Value Disclosure	(16.8)	(7.6)
Deferred compensation plan	46.1	50.8
Total recurring fair value measurements	31.4	43.3
Goodwill		996.4
Indefinite-Lived Trade Names		138.1
Assets, Fair Value Disclosure, Nonrecurring		1,134.5
Fair Value, Inputs, Level 1 | Fair Value, Measurements, Recurring
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Foreign currency contract assets	0.0	0.0
Foreign Currency Contracts, Liability, Fair Value Disclosure	0.0	0.0
Deferred compensation plan	39.7	43.8
Total recurring fair value measurements	39.7	43.8
Goodwill		0.0
Indefinite-Lived Trade Names		0.0
Assets, Fair Value Disclosure, Nonrecurring		0.0
Fair Value, Inputs, Level 2 | Fair Value, Measurements, Recurring
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Foreign currency contract assets	2.1	0.1
Foreign Currency Contracts, Liability, Fair Value Disclosure	(16.8)	(7.6)
Deferred compensation plan	6.4	7.0
Total recurring fair value measurements	(8.3)	(0.5)
Goodwill		0.0
Indefinite-Lived Trade Names		0.0
Assets, Fair Value Disclosure, Nonrecurring		0.0
Fair Value, Inputs, Level 3 [Member] | Fair Value, Measurements, Recurring
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Foreign currency contract assets	0.0	0.0
Foreign Currency Contracts, Liability, Fair Value Disclosure	0.0	0.0
Deferred compensation plan	0.0	0.0
Total recurring fair value measurements	$ 0.0	0.0
Goodwill		996.4
Indefinite-Lived Trade Names		138.1
Assets, Fair Value Disclosure, Nonrecurring		$ 1,134.5