Discontinued Operations Net Income (loss) from Discontinued Operations (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Jul. 31, 2013	Jul. 31, 2012	Jul. 31, 2011
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Net revenue from discontinued operations	$ 351	$ 420	$ 402
Income (loss) from discontinued operations before income taxes	(19)	(6)	(76)
Net income (loss) from discontinued operations	35	28	(54)
Intuit Financial Services [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Net revenue from discontinued operations	325	326	311
Income (loss) from discontinued operations before income taxes	52	41	21
Net income (loss) from discontinued operations	34	23	14
Net gain on disposal of business	8	0	0
Intuit Health [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Net revenue from discontinued operations	16	18	12
Income (loss) from discontinued operations before income taxes	(71)	(29)	(67)
Net income (loss) from discontinued operations	(57)	(20)	(50)
Net gain on disposal of business	18	0	0
Intuit Websites [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Net revenue from discontinued operations	10	76	79
Income (loss) from discontinued operations before income taxes	0	(18)	(30)
Net income (loss) from discontinued operations	0	(11)	(18)
Net gain on disposal of business	$ 32	$ 36	$ 0