Segment Information (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended	9 Months Ended
Apr. 30, 2012 segments	Apr. 30, 2011	Apr. 30, 2012 segments	Apr. 30, 2011
Financial results by reportable segment
Total net revenue	$ 1,945	$ 1,848	$ 3,558	$ 3,258
Operating income	1,107	1,061	1,205	1,068
Unallocated corporate items:
Amortization of acquired technology	(4)	(4)	(12)	(13)
Amortization of other acquired intangible assets	(2)	(11)	(33)	(33)
Number of Reportable Segments	7		7
Reportable Segments [Member]
Financial results by reportable segment
Operating income	1,289	1,253	1,797	1,629
Financial Management Solutions [Member]
Financial results by reportable segment
Net revenue	197	183	564	524
Operating income	72	61	181	154
Employee Management Solutions [Member]
Financial results by reportable segment
Net revenue	129	115	378	338
Operating income	81	70	228	197
Payment Solutions [Member]
Financial results by reportable segment
Net revenue	107	93	300	258
Operating income	25	20	72	44
Consumer Tax [Member]
Financial results by reportable segment
Net revenue	1,072	1,036	1,408	1,270
Operating income	845	853	931	877
Accounting Professionals [Member]
Financial results by reportable segment
Net revenue	236	225	394	372
Operating income	194	187	261	241
Financial Services [Member]
Financial results by reportable segment
Net revenue	91	89	272	254
Operating income	23	20	66	57
Other Businesses [Member]
Financial results by reportable segment
Net revenue	113	107	242	242
Operating income	49	42	58	59
Unallocated Amount to Segment [Member]
Unallocated corporate items:
Share-based compensation expense	(37)	(39)	(120)	(112)
Other common expenses	(139)	(138)	(427)	(403)
Amortization of acquired technology	(4)	(4)	(12)	(13)
Amortization of other acquired intangible assets	(2)	(11)	(33)	(33)
Total unallocated corporate items	$ (182)	$ (192)	$ (592)	$ (561)
Maximum [Member] \| Segment, Geographical, Groups of Countries, Group One [Member]
Unallocated corporate items:
International Total Net Revenue As A Percentage Of Total	5.00%	5.00%	5.00%	5.00%

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Number of Reportable Segments

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Total unallocated corporate items.

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Represents the expense recognized during the period arising from equity-based compensation arrangements (for example, shares of stock, unit, stock options or other equity instruments) with employees, directors and certain consultants qualifying for treatment as employees.

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The aggregate expense charged against earnings to allocate the cost of acquired intangible assets. As a noncash expense, this element is added back to net income when calculating cash provided by (used in) operations using the indirect method.

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The net result for the period of deducting operating expenses from operating revenues.

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Total revenue from sale of goods and services rendered during the reporting period, in the normal course of business, reduced by sales returns and allowances, and sales discounts.

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Amount of total revenue for the reportable segments, including revenue from external customers, transactions with other operating segments of the same entity, and (gross) interest revenue. All considered to be "operating revenue" for purposes of the taxonomy.

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