Unaudited Interim Financial Information - Additional Information (Detail) - USD ($) $ / shares in Units, $ in Millions	3 Months Ended								12 Months Ended
	Dec. 31, 2016	Sep. 30, 2016	Jun. 30, 2016	Mar. 31, 2016	Dec. 31, 2015	Sep. 30, 2015	Jun. 30, 2015	Mar. 31, 2015	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Quarterly Financial Data [Line Items]
Litigation charges, net	$ 45.7	$ 110.6		$ 48.9		$ 241.1	$ 343.7	$ 10.3
Acquisition-related items	6.8	5.0	$ 3.9	4.5	$ 33.9	2.5	4.5	9.2
Acquisition related item, purchased accounting adjustment	3.7			5.8	(24.3)			10.2
Restructuring and productivity initiative costs	4.1	4.6	11.9	9.8	14.5	14.6	8.5	3.9	$ 30.4	$ 41.5	$ 11.8
Increase (decrease) in net income (loss) attributable to common share holders	$ (27.6)	$ (81.5)	$ (11.3)	$ (39.4)	$ (28.3)	$ (240.5)	$ (209.0)	$ (2.6)
Increase (decrease) in diluted earnings per share available to common shareholders	$ (0.37)	$ (1.08)	$ (0.15)	$ (0.52)	$ (0.37)	$ (3.14)	$ (2.73)	$ (0.03)
Reduction in income tax provision		$ (2.6)							(2.6)		(10.9)
Acquisition costs, benefits related to integration costs	$ 3.8
Other income (expense), net, Gore Proceeds							$ 210.5		0.0	210.5	0.0
Acquisition costs, integration costs					$ 5.4
Prepaid Asset | Cost of Goods Sold
Quarterly Financial Data [Line Items]
Other asset impairment charges			$ 1.2						$ 1.2
In-Process Research And Development | Research and Development Expense
Quarterly Financial Data [Line Items]
Impairment of Intangible Assets, Indefinite-lived (Excluding Goodwill)					$ 4.5					$ 4.5	$ 6.8