Long-Term Obligations (Details) (USD $) In Millions, unless otherwise specified	9 Months Ended
	Apr. 30, 2013	Apr. 30, 2012	Jul. 31, 2012	Mar. 12, 2007
Long Term Obligations (Textuals)
Senior notes				$ 1,000
Cash paid for interest on the Notes	29	56
Other long-term obligations
Deferred Rent Credit	55		53
Total license fee payable	47		54
Long-term deferred revenue	43		42
Long-term income tax liabilities	36		41
Long-term deferred income tax liabilities	16		0
Other	7		5
Total long-term obligations	204		195
Less current portion (included in other current liabilities)	(9)		(19)
Long-term obligations due after one year	195		176
5.40 percent fixed-rate notes due 2012 [Member]
Long Term Obligations (Textuals)
Senior notes				500
Senior notes, rate				5.40%
5.75 percent fixed-rate notes due 2017 [Member]
Long Term Obligations (Textuals)
Senior notes				$ 500
Senior notes, rate				5.75%