Other Intangible Assets (Detail) - USD ($) $ in Millions	Dec. 31, 2016	Dec. 31, 2015
Finite Lived and Indefinite Lived Intangible Assets Excluding Goodwill [Line Items]
Gross Carrying Amount	$ 1,681.6	$ 1,612.3
Accumulated amortization	(671.6)	(593.2)
In-Process Research And Development
Finite Lived and Indefinite Lived Intangible Assets Excluding Goodwill [Line Items]
Gross Carrying Amount	121.5	115.7
Core and developed technologies
Finite Lived and Indefinite Lived Intangible Assets Excluding Goodwill [Line Items]
Gross Carrying Amount	1,197.7	1,161.6
Accumulated amortization	(511.3)	(417.3)
Customer relationships
Finite Lived and Indefinite Lived Intangible Assets Excluding Goodwill [Line Items]
Gross Carrying Amount	171.6	150.1
Accumulated amortization	(53.2)	(70.3)
Other Intangible Assets
Finite Lived and Indefinite Lived Intangible Assets Excluding Goodwill [Line Items]
Gross Carrying Amount	190.8	184.9
Accumulated amortization	$ (107.1)	$ (105.6)