Deferred Tax Assets Liabilities (Detail) - USD ($) $ in Millions	Dec. 31, 2015	Dec. 31, 2014
Deferred Tax Assets And Liabilities [Line Items]
Intangibles	$ (1,476.9)	$ (906.4)
Goodwill	(169.3)	(159.7)
Financial reporting amount of a subsidiary in excess of tax basis	(71.2)	(70.4)
Foreign earnings not permanently reinvested	(6.9)	(5.6)
Property and equipment	(78.7)	(11.5)
Convertible debt	(97.1)	(110.4)
Other	(0.7)	(9.0)
Gross deferred tax liabilities	(1,900.8)	(1,273.0)
Net operating loss	66.4	50.9
Accounts receivable allowances	23.1	13.8
Inventory valuation	54.9	58.9
Pension and postretirement	49.5	17.0
Stock-based compensation	39.4	12.6
Other compensation and benefits	26.9	21.3
Operating reserves	52.7	55.4
Other	47.1	38.1
Gross deferred tax assets	360.0	268.0
Valuation allowance	(37.7)	(40.8)
Net deferred tax liability	$ (1,578.5)	$ (1,045.8)