Income Taxes (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended									12 Months Ended	3 Months Ended	12 Months Ended
	Jul. 31, 2014		Jul. 31, 2013		Jul. 31, 2012		Jul. 31, 2014 Domestic Country [Member]	Jul. 31, 2014 State and Local Jurisdiction [Member]	Jul. 31, 2014 Foreign Tax Authority [Member]	Jul. 31, 2014 Financial Services [Member]	Oct. 31, 2013 Intuit Health [Member]	Jul. 31, 2014 Intuit Health [Member]	Jul. 31, 2013 Intuit Websites [Member]	Jul. 31, 2012 Intuit Websites [Member]	Jul. 31, 2014 Valuation Allowance, Investments Held For Sale [Member] Financial Services [Member]	Jul. 31, 2014 Valuation Allowance, Investments Held For Sale [Member] Intuit Health [Member]	Jul. 31, 2013 Valuation Allowance, Investments Held For Sale [Member] Intuit Websites [Member]	Jul. 31, 2014 Research Tax Credit Carryforward [Member] State and Local Jurisdiction [Member]	Jul. 31, 2014 Capital Loss Carryforward [Member] Intuit Websites [Member]
Current:
Federal	$ 324		$ 307		$ 363
State	20		28		28
Foreign	10		5		2
Total current	354		340		393
Deferred:
Federal	91		34		(23)
State	6		2		(4)
Foreign	2		11		8
Total deferred	99		47		(19)
Total provision for income taxes from continuing operations	453		387		374
Income Statement [Abstract]
United States	1,290		1,165		1,096
Foreign	24		45		42
Income from continuing operations before income taxes	1,314		1,210		1,138
Effective Income Tax Rate Reconciliation, Amount [Abstract]
Income from continuing operations before income taxes	1,314		1,210		1,138
Statutory federal income tax	460		424		398
State income tax, net of federal benefit	17		17		16
Federal research and experimentation credits	(8)		(24)		(8)
Domestic production activities deduction	(25)		(29)		(27)
Share-based compensation	9		7		8
Effects of non-U.S. operations	1		(2)		(5)
Other, net	(1)		(6)		(8)
Total provision for income taxes from continuing operations	453		387		374
Deferred Tax Assets, Tax Deferred Expense, Reserves and Accruals [Abstract]
Accruals and reserves not currently deductible	60		51
Deferred rent	11		11
Accrued and deferred compensation	50		50
Loss and tax credit carryforwards	47		36
Property and equipment	0		12
Share-based compensation	50		97
Net basis difference in investments held for sale	0		41							9		32		38
Other, net	2		0
Total deferred tax assets	220		298
Deferred tax liabilities:
Intangible assets	120		93
Property and equipment	4		0
Other, net	0		10
Total deferred tax liabilities	124		103
Total net deferred tax assets	96		195
Valuation allowance	(24)		(25)					(9)							(1)	(14)	(2)		(2)
Total net deferred tax assets, net of valuation allowance	72		170					11
Deferred Tax Assets, Net [Abstract]
Current deferred income taxes	133		166
Long-term deferred income taxes included in other assets	0		10
Long-term deferred income taxes included in other long-term obligations	(61)		(6)
Reconciliation of Unrecognized Tax Benefits, Excluding Amounts Pertaining to Examined Tax Returns [Roll Forward]
Gross unrecognized tax benefits, beginning balance	39		38		41
Increases related to tax positions from prior fiscal years, including acquisitions	4		5		3
Decreases related to tax positions from prior fiscal years	(8)		(12)		(9)
Increases related to tax positions taken during current fiscal year	5		9		3
Settlements with tax authorities	0		(1)		0
Gross unrecognized tax benefits, ending balance	40		39		38
Income Taxes (Textuals)
Income tax effects allocated directly to equity, employee stock options	82		69		71
Federal statutory income tax rate	35.00%
Discrete tax benefit due to changes in federal tax law			8
Earnings from foreign subsidiaries intended to be indefinitely reinvested	48
Deferred tax liabilities, undistributed foreign earnings	7
Pre-tax gain on sale of discontinued operations	40	[1]	53	[1]	0	[1]				8	(4)	18
Deferred tax assets, capital loss carryforwards													16
Operating loss carryforwards							61	183
Total net deferred tax assets, net of valuation allowance	72		170					11
Deferred Tax Assets, Operating Loss Carryforwards, Foreign									18
Deferred Tax Assets, Tax Credit Carryforwards																		27
Amount of Carryforward, if Realized, to be Recognized as Additional Paid in Capital																		7
Unrecognized tax benefits net of related deferred tax assets	26
Favorable net impact to income tax expense due to recognition of tax benefits	$ 26

[1] Because the cash flows of our Intuit Financial Services, Intuit Health, and Intuit Websites 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.