Stockholders' Equity (Details) (USD $)	12 Months Ended																																											12 Months Ended											12 Months Ended		0 Months Ended						12 Months Ended
	Jul. 31, 2014 Period_of_time		Jul. 31, 2013		Jul. 31, 2012		Jul. 31, 2014 Sales Revenue, Services, Net [Member]	Jul. 31, 2013 Sales Revenue, Services, Net [Member]	Jul. 31, 2012 Sales Revenue, Services, Net [Member]	Jul. 31, 2014 Selling and Marketing Expense [Member]	Jul. 31, 2013 Selling and Marketing Expense [Member]	Jul. 31, 2012 Selling and Marketing Expense [Member]	Jul. 31, 2014 Research and Development Expense [Member]	Jul. 31, 2013 Research and Development Expense [Member]	Jul. 31, 2012 Research and Development Expense [Member]	Jul. 31, 2014 General and Administrative Expense [Member]	Jul. 31, 2013 General and Administrative Expense [Member]	Jul. 31, 2012 General and Administrative Expense [Member]	Jul. 31, 2014 Segment, Continuing Operations [Member]	Jul. 31, 2013 Segment, Continuing Operations [Member]	Jul. 31, 2012 Segment, Continuing Operations [Member]	Jul. 31, 2014 Stock Options [Member]	Jul. 31, 2013 Stock Options [Member]	Jul. 31, 2012 Stock Options [Member]	Jul. 31, 2014 Restricted Stock Units (RSUs) [Member]	Jul. 31, 2013 Restricted Stock Units (RSUs) [Member]	Jul. 31, 2012 Restricted Stock Units (RSUs) [Member]	Jul. 31, 2014 Stock Options And Espp [Member]	Jul. 31, 2013 Stock Options And Espp [Member]	Jul. 31, 2012 Stock Options And Espp [Member]	Jul. 31, 2014 Employee Stock [Member]	Jul. 31, 2013 Employee Stock [Member]	Jul. 31, 2012 Employee Stock [Member]	Jul. 31, 2014 Share Based Compensation Expense [Member]	Jul. 31, 2013 Share Based Compensation Expense [Member]	Jul. 31, 2012 Share Based Compensation Expense [Member]	Jul. 31, 2014 Minimum [Member] Stock Options [Member]	Jul. 31, 2013 Minimum [Member] Stock Options [Member]	Jul. 31, 2012 Minimum [Member] Stock Options [Member]	Jul. 31, 2014 Minimum [Member] Employee Stock [Member]	Jul. 31, 2013 Minimum [Member] Employee Stock [Member]	Jul. 31, 2012 Minimum [Member] Employee Stock [Member]	Jul. 31, 2014 Maximum [Member]	Jul. 31, 2014 Maximum [Member] Stock Options [Member]	Jul. 31, 2013 Maximum [Member] Stock Options [Member]	Jul. 31, 2012 Maximum [Member] Stock Options [Member]	Jul. 31, 2014 Maximum [Member] Employee Stock [Member]	Jul. 31, 2013 Maximum [Member] Employee Stock [Member]	Jul. 31, 2012 Maximum [Member] Employee Stock [Member]	Jul. 31, 2014 Common Stock [Member]	Jul. 31, 2013 Common Stock [Member]	Jul. 31, 2012 Common Stock [Member]	Jul. 31, 2014 Accumulated Translation Adjustment [Member]	Jul. 31, 2013 Accumulated Translation Adjustment [Member]	Jul. 31, 2013 Intuit Financial Services [Member]	Jul. 31, 2012 Intuit Financial Services [Member]	Dec. 23, 2013 Common Stock [Member] Accelerated Stock Repurchase Agreement [Member]	Aug. 23, 2013 Common Stock [Member] Accelerated Stock Repurchase Agreement [Member]	Jul. 31, 2014 Equity Securities [Member] Accumulated Net Unrealized Investment Gain (Loss) [Member]	Jul. 31, 2013 Equity Securities [Member] Accumulated Net Unrealized Investment Gain (Loss) [Member]	Jul. 31, 2014 Debt Securities [Member] Accumulated Net Unrealized Investment Gain (Loss) [Member]	Jul. 31, 2013 Debt Securities [Member] Accumulated Net Unrealized Investment Gain (Loss) [Member]	Jul. 31, 2013 Current Program [Member]	Jul. 31, 2014 Current Program [Member]	Jul. 31, 2014 Restated 2005 Plan [Member]	Aug. 31, 2014 Subsequent Event [Member]
Stockholders' Equity (Textuals)
Common stock repurchased, share																																																		22,467,000	4,820,000	16,864,000					2,600,000	17,600,000
Common stock repurchased, value	$ 1,577,000,000		$ 292,000,000		$ 900,000,000																																																										$ 292,000,000
Stock repurchase program remaining authorized repurchase amount																																																																1,900,000,000
Stock repurchase program, authorized amount																																																										1,400,000,000
Accelerated Share Repurchases, Settlement (Payment) or Receipt																																																										1,400,000,000
Common Stock, Dividends, Per Share, Cash Paid	$ 0.76
Payments of Dividends	220,000,000		203,000,000		178,000,000
Dividend per share payable																																																																		$ 0.25
Common stock, shares authorized	750,000,000		750,000,000																												20,800,000																																		115,000,000
Pool Shares Reduced For Each Share Granted	2.3
Pool Shares Increased For Each Share Forfeited	2.3
Award vesting period																						3 years			3 years
Number of years until options vest																						7 years
Stock Offering Period, Months, Employee Stock Purchase Plans	6 months
Stock Accrual Period, Employee Stock Purchase Plans, Number of Accrual Periods	2
Stock Offering Period, Number of Months in Accrual Period	3 months
Percentage of lower of the closing price for stock on the first day last day of the offering period	85.00%
Shares issued during period for Employee Stock Purchase Plans	1,044,961		1,172,822		1,031,483
Shares available for issuance under Employee Stock Purchase Plan	2,531,405
Market price of common stock used to define in money options exercise price																																											$ 81.97
Unrecognized compensation cost related to non-vested share based compensation expense																						71,000,000			384,000,000
Expected weighted average vesting period to recognize compensation cost related to share based compensation expense, in years																						2 years 5 months 15 days			2 years 5 months
Share-based Compensation [Abstract]
Share-based compensation expense	204,000,000		195,000,000		169,000,000		8,000,000	6,000,000	4,000,000	59,000,000	64,000,000	56,000,000	66,000,000	55,000,000	49,000,000	71,000,000	59,000,000	50,000,000	204,000,000	184,000,000	159,000,000																																		11,000,000	10,000,000
Total tax benefit for stock option, restricted stock and ESPP share-based compensation	(66,000,000)		(61,000,000)		(51,000,000)																				(54,000,000)	(46,000,000)	(37,000,000)	(12,000,000)	(15,000,000)	(14,000,000)
Allocated share-based compensation expense, net of tax	138,000,000		123,000,000		108,000,000
Decrease in net income per share:
Basic																																		$ 0.48	$ 0.41	$ 0.36
Diluted																																		$ 0.47	$ 0.41	$ 0.35
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions and Methodology [Abstract]
Expected volatility (range)																																					22.00%	22.00%	27.00%	19.00%	20.00%	24.00%		24.00%	27.00%	33.00%	22.00%	24.00%	33.00%
Weighted average expected volatility																						23.00%	23.00%	29.00%							21.00%	22.00%	29.00%
Risk-free interest rate (range)																																					1.01%	0.49%	0.43%	0.02%	0.05%	0.00%		1.40%	1.05%	0.85%	0.08%	0.11%	0.10%
Expected dividend yield																																					0.92%	1.02%	1.02%	0.94%	1.04%	1.00%		1.06%	1.18%	1.20%	1.15%	1.17%	1.20%
Share-Based Awards Available for Grant [Roll Forward]
Shares available for Grant, Beginning	12,120,000		21,760,000		30,716,000
Additional shares authorized	19,000,000
Options granted	(2,206,000)		(2,607,000)		(3,167,000)
Restricted stock units granted	(8,959,000)	[1]	(9,310,000)	[1]	(7,902,000)	[1]
Share-based awards canceled/forfeited/expired	4,248,000	[1],[2]	2,277,000	[1],[2]	2,113,000	[1],[2]
Shares available for Grant, Ending	24,203,000		12,120,000		21,760,000																	24,200,000
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding [Roll Forward]
Number of shares, Beginning Balance	14,206,000		18,061,000		22,679,000
Options granted	2,206,000		2,607,000		3,167,000
Options assumed and converted in connection with acquisitions	261,000				282,000
Options exercised, number of shares	(5,041,000)		(5,826,000)		(7,513,000)
Options canceled or expired, number of shares	(694,000)		(636,000)		(554,000)
Number of shares, Ending Balance	10,938,000		14,206,000		18,061,000
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Exercise Price [Roll Forward]
Weighted average exercise price per share, Beginning Balance	$ 43.77		$ 37.49		$ 32.38
Options granted, weighted average exercise price per share	$ 82.15		$ 62.93		$ 51.36
Share-based Compensation Arrangements by Share-based Payment Award, Options, Other Share Increase (Decrease) in Period, Weighted Average Exercise Price	$ 5.16				$ 54.51
Options exercised, weighted average exercise price per share	$ 37.74		$ 32.79		$ 28.41
Options canceled or expired, weighted average exercise price per share	$ 54.77		$ 44.60		$ 39.43
Weighted average exercise price per share, Ending Balance	$ 52.67		$ 43.77		$ 37.49
Share-based Compensation Arrangement by Share-based Payment Award, Options, Additional Disclosures [Abstract]
Number of shares (in thousands), options outstanding	10,938,000		14,206,000		18,061,000
Weighted average remaining contractual life (in years), options outstanding	5 years 2 months 16 days
Weighted average exercise price per share, options outstanding	$ 52.67		$ 43.77		$ 37.49
Aggregate intrinsic value (in millions), options outstanding	322,000,000
Number of shares (in thousands), options exercisable and expected to vest	10,496,000
Weighted average remaining contractual life (in years), options exercisable and expected to vest	5 years 29 days
Weighted Average Exercise Price per Share. options exercisable and expected to vest	$ 51.96
Aggregate Intrinsic Value (in millions), options exercisable and expected to vest	317,000,000
Number of Shares (in thousands), options exercisable	5,177,000
Weighted Average Remaining Contractual Life (in Years), options exercisable	2 years 10 months 2 days
Weighted Average Exercise Price per Share, options exercisable	$ 38.18
Aggregate Intrinsic Value (in millions), options exercisable	227,000,000
Additional information regarding stock options, restricted stock and ESPP
Weighted average fair value of options granted	$ 21.34		$ 11.24		$ 15.22
Total fair value of options vested	20,000,000		41,000,000		39,000,000
Aggregate intrinsic value of options exercised	177,000,000		166,000,000		202,000,000
Share based compensation expense for stock options, restricted stock and ESPP																									156,000,000	135,000,000	106,000,000	48,000,000	49,000,000	53,000,000
Total tax benefit related to RSU share-based compensation expense	66,000,000		61,000,000		51,000,000																				54,000,000	46,000,000	37,000,000	12,000,000	15,000,000	14,000,000
Cash received from option exercises	190,000,000		191,000,000		213,000,000
Cash tax benefits realized related to tax deductions for non-qualified option exercises and disqualifying dispositions under all share-based payment arrangements	63,000,000		60,000,000		72,000,000
Summary of restricted stock unit activity
Nonvested, Number of shares, Beginning Balance	9,184,000		9,607,000		11,055,000
Number of shares granted	3,896,000		4,048,000		3,436,000
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Assumed in Connection with Business Acquisitions	782,000				575,000
Vested, Number of Shares	(2,820,000)		(3,670,000)		(4,763,000)
Forfeited, Number of Shares	(1,587,000)		(801,000)		(696,000)
Nonvested, Number of shares, Ending Balance	9,455,000		9,184,000		9,607,000
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date Fair Value [Roll Forward]
Nonvested, Weighted Average Grant Date Fair Value, Beginning Balance	$ 55.23		$ 46.79		$ 37.92
Granted, Weighted Average Grant Date Fair Value	$ 71.37		$ 62.76		$ 55.02
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Assumed in Connection with Business Acquisitions, Weighted Average Grant Date Fair Value	$ 71.00				$ 54.51
Vested, Weighted Average Grant Date Fair Value	$ 53.98		$ 43.00		$ 34.13
Forfeited, Weighted Average Grant Date Fair Value	$ 61.76		$ 48.16		$ 39.56
Nonvested, Weighted Average Grant Date Fair Value, Ending Balance	$ 62.46		$ 55.23		$ 46.79
Additional information regarding RSUs
Total fair value of RSUs vested																									204,000,000	224,000,000	258,000,000
Share-based compensation for RSUs																									156,000,000	135,000,000	106,000,000	48,000,000	49,000,000	53,000,000
Total tax benefit related to RSU share-based compensation expense	66,000,000		61,000,000		51,000,000																				54,000,000	46,000,000	37,000,000	12,000,000	15,000,000	14,000,000
Cash tax benefits realized for tax deductions for RSUs																									134,000,000	77,000,000	46,000,000
Accumulated Other Comprehensive Income (Loss), Net of Tax [Abstract]
Accumulated Other Comprehensive Income (Loss), Net of Tax	$ (2,000,000)		$ 20,000,000																																																		$ (3,000,000)	$ 2,000,000					$ 0	$ 18,000,000	$ 1,000,000	$ 0

[1] RSUs granted from the pool of shares available for grant under our 2005 Equity Incentive Plan reduce the pool by 2.3 shares for each share granted. RSUs forfeited and returned to the pool of shares available for grant increase the pool by 2.3 shares for each share forfeited.

[2] Stock options and restricted stock units canceled, expired or forfeited under our 2005 Equity Incentive Plan are returned to the pool of shares available for grant. Stock options and restricted stock units canceled, expired or forfeited under older expired plans are not returned to the pool of shares available for grant.