Discontinued Operations (Details)			3 Months Ended		12 Months Ended
		Aug. 01, 2013 USD ($)	Oct. 31, 2013 USD ($)	Jul. 31, 2013 USD ($)	Jul. 31, 2016 USD ($) business	Jul. 31, 2015 USD ($)	Jul. 31, 2014 USD ($)
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Proceeds from divestiture of businesses					$ 463,000,000	$ 0	$ 1,025,000,000
Discontinued Operations (Textuals)
Pre-tax gain (loss) on sale of discontinued operations	[1]				354,000,000	0	40,000,000
Demandforce, QuickBase, and Quicken
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Proceeds from divestiture of businesses					463,000,000
Discontinued Operations (Textuals)
Pre-tax gain (loss) on sale of discontinued operations	[1]				$ 354,000,000
Number of businesses disposed | business					3
Income tax expense (benefit) from discontinued operations					$ 179,000,000
Net gain (loss) on disposal of business					(173,000,000)	(124,000,000)	0
Intuit Financial Services
Discontinued Operations (Textuals)
Gross proceeds from sale of business		$ 1,025,000,000
Pre-tax gain (loss) on sale of discontinued operations			$ 44,000,000
Income tax expense (benefit) from discontinued operations			8,000,000
Net gain (loss) on disposal of business			36,000,000		0	0	36,000,000
Impairment of long-lived assets to be disposed of				$ 0
Intuit Health
Discontinued Operations (Textuals)
Pre-tax gain (loss) on sale of discontinued operations			(4,000,000)
Income tax expense (benefit) from discontinued operations			(14,000,000)
Net gain (loss) on disposal of business			$ 10,000,000		$ 0	$ 0	$ 10,000,000
Impairment of long-lived assets to be disposed of				$ 0

[1] Because the cash flows of our discontinued operations were not material for any period presented, we have not segregated the cash flows of those businesses on these statements of cash flows. We have presented the effect of the pre-tax gains on the disposals on these statements of cash flows. See Note 7, “Discontinued Operations,” for more information.