Discontinued Operations Net Income (loss) from Discontinued Operations (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended			3 Months Ended	12 Months Ended			3 Months Ended	12 Months Ended			0 Months Ended	12 Months Ended
	Jul. 31, 2014	Jul. 31, 2013	Jul. 31, 2012	Oct. 31, 2013 Intuit Financial Services [Member]	Jul. 31, 2014 Intuit Financial Services [Member]	Jul. 31, 2013 Intuit Financial Services [Member]	Jul. 31, 2012 Intuit Financial Services [Member]	Oct. 31, 2013 Intuit Health [Member]	Jul. 31, 2014 Intuit Health [Member]	Jul. 31, 2013 Intuit Health [Member]	Jul. 31, 2012 Intuit Health [Member]	Sep. 17, 2012 Intuit Websites [Member]	Jul. 31, 2014 Intuit Websites [Member]	Jul. 31, 2013 Intuit Websites [Member]	Jul. 31, 2012 Intuit Websites [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Net revenue from discontinued operations	$ 1	$ 351	$ 420		$ 0	$ 325	$ 326		$ 1	$ 16	$ 18		$ 0	$ 10	$ 76
Income (loss) from discontinued operations before income taxes	(1)	(19)	(6)		0	52	41		(1)	(71)	(29)		0	0	(18)
Net income (loss) from discontinued operations	46	35	28		0	34	23		0	(57)	(20)		0	0	(11)
Net gain on disposal of business				$ 36	$ 36	$ 8	$ 0	$ 10	$ 10	$ 18	$ 0	$ 32	$ 0	$ 32	$ 36