Current Liabilities Other current liabilities (Details) (USD $) In Millions, unless otherwise specified	Oct. 31, 2013	Jul. 31, 2013
Other Liabilities, Current [Abstract]
Reserve for product returns	$ 20	$ 20
Reserve for rebates	19	15
Current portion of license fee payable	10	10
Current portion of deferred rent	8	8
Interest payable	3	10
Executive deferred compensation plan liabilities	72	64
Other	23	29
Total other current liabilities	$ 155	$ 156