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Summary of Significant Accounting Policies - Schedule of Intangible Assets (Detail) - USD ($) $ in Millions	Sep. 26, 2015	Sep. 27, 2014
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Value	$ 5,322.8	$ 5,325.0
Accumulated Amortization	2,299.6	1,891.4
Developed Technology [Member]
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Value	3,979.1	3,965.6
Accumulated Amortization	1,698.5	1,399.4
In-process Research and Development [Member]
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Value	3.7	17.9
Accumulated Amortization	0.0	0.0
Customer Relationships and Contracts [Member]
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Value	1,101.1	1,102.4
Accumulated Amortization	467.5	384.7
Trade Names [Member]
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Value	236.4	236.5
Accumulated Amortization	131.5	105.3
Business Licenses [Member]
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Value	2.5	2.6
Accumulated Amortization	$ 2.1	$ 2.0

X

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Accumulated amount of amortization of assets, excluding financial assets and goodwill, lacking physical substance with a finite life.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef



-Publisher FASB



-Name Accounting Standards Codification



-Topic 350



-SubTopic 30



-Section 50



-Paragraph 2



-Subparagraph (a)(1)



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-Publisher FASB



-Name Accounting Standards Codification



-Topic 350



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