Income Taxes (Details 3)	12 Months Ended
Jul. 31, 2012	Jul. 31, 2011	Jul. 31, 2010
Reconciliation of Effective Income Tax Rate
Tax at statutory rate	35.00%	35.00%	35.00%
Goodwill impairment	178.00%	0.00%	0.00%
State income taxes, net of federal tax benefit	0.70%	0.00%	0.60%
International rate differential	(43.30%)	(6.30%)	(9.80%)
Non-creditable withholding taxes	14.30%	0.80%	1.80%
Rate variances arising from foreign subsidiary distributions	(39.90%)	(6.50%)	(2.60%)
Adjustments to tax accruals and reserves	58.50%	3.80%	(0.50%)
Research and development tax credits and section 199 manufacturer's deduction	(6.40%)	(1.10%)	(0.30%)
Foreign tax credit carryforward adjustments	21.10%	0.00%	0.00%
Other, net	2.90%	(1.10%)	0.90%
Effective tax rate	178.70%	24.60%	25.10%

Effective income tax rate reconciliation adjustments to tax accruals and reserves.

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Effective income tax rate reconciliation goodwill impairment.

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Effective income tax rate reconciliation non creditable withholding taxes.

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Income tax reconciliation rate variances arising from foreign subsidiary distributions.

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- Definition

A ratio calculated by dividing the reported amount of income tax expense attributable to continuing operations for the period by GAAP-basis pretax income from continuing operations.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 08

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-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 109

-Paragraph 47

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

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-Publisher FASB

-Name Accounting Standards Codification

-Topic 740

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-Name Accounting Standards Codification

-Topic 235

-SubTopic 10

-Section S99

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-Subparagraph (SX 210.4-08.(h)(2))

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- Definition

The domestic federal statutory tax rate applicable under enacted tax laws to the Company's pretax income from continuing operations for the period. The "statutory" tax rate is the regular tax rate if there are alternative tax systems.

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Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 109

-Paragraph 47

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The portion of the difference between the effective income tax rate and domestic federal statutory income tax rate that can be explained by the difference between statutory income tax rates in foreign jurisdictions and the domestic federal statutory income tax rate recorded during the period.

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Reference 1: http://www.xbrl.org/2003/role/presentationRef

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The portion of the difference between the effective income tax rate and domestic federal statutory income tax rate attributable to all other items not otherwise listed in the existing taxonomy.

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The portion of the difference between the effective income tax rate and domestic federal statutory income tax rate that can be explained by the state and local income tax expense or benefit, net of the federal tax benefit (expense) thereon, recorded during the period.

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The portion of the difference between the effective income tax rate and domestic federal statutory income tax rate that can be explained by foreign tax credits generated or utilized under enacted tax laws during the period.

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The portion of the difference between the effective income tax rate and domestic federal statutory income tax rate that can be explained by research tax credits generated or utilized under enacted tax laws during the period.

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