Business Combinations (Details) (USD $) In Millions, unless otherwise specified				0 Months Ended	12 Months Ended		0 Months Ended	12 Months Ended
	Jul. 31, 2014	Jul. 31, 2013	Jul. 31, 2012	Jun. 16, 2014 Check Inc. [Member]	Jul. 31, 2014 Check Inc. [Member]	Jun. 16, 2014 Check Inc. [Member]	May 18, 2012 Demandforce, Inc. [Member]	Jul. 31, 2014 Demandforce, Inc. [Member]	May 18, 2012 Demandforce, Inc. [Member]
Business Combinations (Textuals)
Cost of acquired entity				$ 369			$ 449
Purchase consideration				342
Fair value of assumed equity awards						27
Net tangible assets acquired						14
Intangible assets acquired						35
Goodwill	1,635	1,246	1,286			293			316
Fair value of assumed equity awards and cash retention bonuses that will be charged to expense over the service period									44
Fair value of assumed equity awards, expected service period, in years					4 years			4 years
Business Acquisition Purchase Price Allocation Net Tangible Liabilities									4
Allocation of consideration to identified intangible assets									$ 93
Amortization of identified intangible assets over weighted average life, in years					5 years			6 years