Business Combinations - Allocation of Purchase Price to Identifiable Tangible and Acquisition of Intangible Assets and Liabilities (Detail) - Enterprise Business $ in Millions	Oct. 27, 2014 USD ($)
Business Acquisition [Line Items]
Intangible Assets, Amount	$ 994
Customer relationships
Business Acquisition [Line Items]
Intangible Assets, Amount	$ 450
Intangible Assets weighted average amortization period	7 years
Unpatented technology
Business Acquisition [Line Items]
Intangible Assets, Amount	$ 270
Intangible Assets weighted average amortization period	3 years 10 months 24 days
Patented technology
Business Acquisition [Line Items]
Intangible Assets, Amount	$ 215
Intangible Assets weighted average amortization period	3 years 6 months
Trade names
Business Acquisition [Line Items]
Intangible Assets, Amount	$ 40
Intangible Assets weighted average amortization period	2 years
Backlog
Business Acquisition [Line Items]
Intangible Assets, Amount	$ 19
Intangible Assets weighted average amortization period	1 year