Income Taxes (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Jul. 31, 2013		Jul. 31, 2012		Jul. 31, 2011
Current:
Federal	$ 307		$ 363		$ 273
State	28		28		46
Foreign	5		2		5
Total current	340		393		324
Deferred:
Federal	34		(23)		16
State	2		(4)		8
Foreign	11		8		6
Total deferred	47		(19)		30
Total provision for income taxes from continuing operations	387		374		354
Income Statement [Abstract]
United States	1,165		1,096		995
Foreign	45		42		47
Income from continuing operations before income taxes	1,210		1,138		1,042
Income Tax Expense (Benefit), Continuing Operations, Income Tax Reconciliation [Abstract]
Income from continuing operations before income taxes	1,210		1,138		1,042
Statutory federal income tax	424		398		365
State income tax, net of federal benefit	17		16		36
Federal research and experimentation credits	(24)		(8)		(23)
Domestic production activities deduction	(29)		(27)		(25)
Share-based compensation	7		8		6
Effects of non-U.S. operations	(2)		(5)		(4)
Other, net	(6)		(8)		(1)
Total provision for income taxes from continuing operations	387		374		354
Deferred Tax Assets, Tax Deferred Expense, Reserves and Accruals [Abstract]
Accruals and reserves not currently deductible	51		46
Deferred rent	11		11
Accrued and deferred compensation	50		48
Loss and tax credit carryforwards	36		41
Property and equipment	12		15
Share-based compensation	97		97
Net basis difference in investments held for sale	41		38
Total deferred tax assets	298		296
Deferred tax liabilities:
Intangible assets	93		92
Other, net	10		11
Total deferred tax liabilities	103		103
Total net deferred tax assets	195		193
Valuation allowance	(25)		(10)
Total net deferred tax assets, net of valuation allowance	170		183
Deferred Tax Assets, Net [Abstract]
Current deferred income taxes	166		183
Long-term deferred income taxes included in other assets	10		0
Long-term deferred income taxes included in other long-term obligations	(6)		0
Reconciliation of Unrecognized Tax Benefits, Excluding Amounts Pertaining to Examined Tax Returns [Roll Forward]
Gross unrecognized tax benefits, beginning balance	38		41		35
Increases related to tax positions from prior fiscal years, including acquisitions	5		3		2
Decreases related to tax positions from prior fiscal years	(12)		(9)		0
Increases related to tax positions taken during current fiscal year	9		3		4
Settlements with tax authorities	(1)		0		0
Gross unrecognized tax benefits, ending balance	39		38		41
Income Taxes (Textuals)
Income tax effects allocated directly to equity, employee stock options	69		71		81
Federal statutory income tax rate	35.00%
Discrete tax benefit due to changes in federal tax law	8		9
Earnings from foreign subsidiaries intended to be indefinitely reinvested	57
Deferred tax liabilities, undistributed foreign earnings	14
Pre-tax gain on sale of discontinued operations	53	[1]	0	[1]	0	[1]
Operating loss carryforwards, expiration dates	2029
Excess foreign tax credits	6
Federal foreign tax credits carried back	5
Deferred tax assets, operating loss carryforwards, foreign	1
Total net deferred tax assets, net of valuation allowance	170		183
Unrecognized tax benefits net of related deferred tax assets	27
Favorable net impact to income tax expense due to recognition of tax benefits	27
Domestic Country [Member]
Income Taxes (Textuals)
Operating loss carryforwards	12
State and Local Jurisdiction [Member]
Deferred tax liabilities:
Total net deferred tax assets, net of valuation allowance	7
Income Taxes (Textuals)
Operating loss carryforwards	128
Total net deferred tax assets, net of valuation allowance	7
Financial Services [Member]
Deferred Tax Assets, Tax Deferred Expense, Reserves and Accruals [Abstract]
Net basis difference in investments held for sale	9
Income Taxes (Textuals)
Pre-tax gain on sale of discontinued operations	8
Intuit Health [Member]
Deferred Tax Assets, Tax Deferred Expense, Reserves and Accruals [Abstract]
Net basis difference in investments held for sale	32
Income Taxes (Textuals)
Pre-tax gain on sale of discontinued operations	18
Intuit Websites [Member]
Deferred Tax Assets, Tax Deferred Expense, Reserves and Accruals [Abstract]
Net basis difference in investments held for sale			38
Income Taxes (Textuals)
Deferred tax assets, capital loss carryforwards	16
Deferred tax assets, capital loss carryforwards, net	41
Capital Loss Carryforward [Member] | Intuit Websites [Member]
Deferred tax liabilities:
Valuation allowance	(2)
Valuation Allowance, Investments Held For Sale [Member] | Financial Services [Member]
Deferred tax liabilities:
Valuation allowance	(1)
Valuation Allowance, Investments Held For Sale [Member] | Intuit Health [Member]
Deferred tax liabilities:
Valuation allowance	(14)
Valuation Allowance, Investments Held For Sale [Member] | Intuit Websites [Member]
Deferred tax liabilities:
Valuation allowance			(2)
Research Tax Credit Carryforward [Member] | State and Local Jurisdiction [Member]
Income Taxes (Textuals)
Research carryforward	14
Amount of Carryforward, if Realized, to be Recognized as Additional Paid in Capital	$ 4

[1] Because the cash flows of our Intuit Websites, Intuit Financial Services, and Intuit Health 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 gain on disposal of our Intuit Websites discontinued operations on the fiscal 2013 statement of cash flows. See Note 8, “Discontinued Operations,” for more information.