Goodwill and Acquired Intangible Assets (Details) - USD ($)	12 Months Ended
	Jul. 31, 2016	Jul. 31, 2015	Jul. 31, 2014
Goodwill [Roll Forward]
Goodwill, beginning	$ 1,266,000,000	$ 1,323,000,000
Goodwill Acquired/ Adjusted	16,000,000	57,000,000
Goodwill Impairment Charges		(114,000,000)	$ 0
Goodwill, ending	1,282,000,000	1,266,000,000	1,323,000,000
Small Business
Goodwill [Roll Forward]
Goodwill, beginning	1,157,000,000	1,213,000,000
Goodwill Acquired/ Adjusted	16,000,000	58,000,000
Goodwill Impairment Charges		(114,000,000)
Goodwill, ending	1,173,000,000	1,157,000,000	1,213,000,000
Consumer Tax
Goodwill [Roll Forward]
Goodwill, beginning	18,000,000	17,000,000
Goodwill Acquired/ Adjusted	0	1,000,000
Goodwill Impairment Charges		0
Goodwill, ending	18,000,000	18,000,000	17,000,000
ProConnect
Goodwill [Roll Forward]
Goodwill, beginning	91,000,000	93,000,000
Goodwill Acquired/ Adjusted	0	(2,000,000)
Goodwill Impairment Charges		0
Goodwill, ending	$ 91,000,000	$ 91,000,000	$ 93,000,000