Income Taxes	9 Months Ended
Apr. 30, 2015
Income Tax Disclosure [Abstract]
Income Taxes	Income Taxes Effective Tax Rate We compute our provision for or benefit from income taxes by applying the estimated annual effective tax rate to income or loss from recurring operations and adding the effects of any discrete income tax items specific to the period. In December 2014 the Tax Increase Prevention Act of 2014 was signed into law. The Act includes a reinstatement of the federal research and experimentation credit through December 31, 2014 that was retroactive to January 1, 2014. We recorded a discrete tax benefit of approximately $11 million for the retroactive effect during the second quarter of fiscal 2015. Our effective tax rates for the three and nine months ended April 30, 2015 were approximately 44% and 48%. Excluding discrete tax items primarily related to the goodwill impairment charge, our effective tax rate for the three months ended April 30, 2015 was approximately 36% and did not differ significantly from the federal statutory rate of 35%. Excluding discrete tax items primarily related to the goodwill impairment charge and the reinstatement of the federal research and experimentation credit, our effective tax rate for the nine months ended April 30, 2015 was approximately 36% and did not differ significantly from the federal statutory rate of 35%. Tax expense related to share based compensation, state income taxes, and the effects of losses in certain jurisdictions where we do not recognize a tax benefit were partially offset by the benefit we received from the domestic production activities deduction and the federal research and experimentation credit in both periods. Our effective tax rate for the three and nine months ended April 30, 2014 was approximately 34% and did not differ significantly from the federal statutory rate of 35%. The benefits we received from the domestic production activities deduction and the federal research and experimentation credit were substantially offset by state income taxes in both periods. Unrecognized Tax Benefits and Other Considerations The total amount of our unrecognized tax benefits at July 31, 2014 was $40 million. Net of related deferred tax assets, unrecognized tax benefits were $26 million at that date. If we were to recognize these net benefits, our income tax expense would reflect a favorable net impact of $26 million. There were no material changes to these amounts during the nine months ended April 30, 2015. We do not believe that it is reasonably possible that there will be a significant increase or decrease in our unrecognized tax benefits over the next 12 months.

Income Taxes

Effective Tax Rate

We compute our provision for or benefit from income taxes by applying the estimated annual effective tax rate to income or loss from recurring operations and adding the effects of any discrete income tax items specific to the period.

In December 2014 the Tax Increase Prevention Act of 2014 was signed into law. The Act includes a reinstatement of the federal research and experimentation credit through December 31, 2014 that was retroactive to January 1, 2014. We recorded a discrete tax benefit of approximately $11 million for the retroactive effect during the second quarter of fiscal 2015.

Our effective tax rates for the three and nine months ended April 30, 2015 were approximately 44% and 48%. Excluding discrete tax items primarily related to the goodwill impairment charge, our effective tax rate for the three months ended April 30, 2015 was approximately 36% and did not differ significantly from the federal statutory rate of 35%. Excluding discrete tax items primarily related to the goodwill impairment charge and the reinstatement of the federal research and experimentation credit, our effective tax rate for the nine months ended April 30, 2015 was approximately 36% and did not differ significantly from the federal statutory rate of 35%. Tax expense related to share based compensation, state income taxes, and the effects of losses in certain jurisdictions where we do not recognize a tax benefit were partially offset by the benefit we received from the domestic production activities deduction and the federal research and experimentation credit in both periods.

Our effective tax rate for the three and nine months ended April 30, 2014 was approximately 34% and did not differ significantly from the federal statutory rate of 35%. The benefits we received from the domestic production activities deduction and the federal research and experimentation credit were substantially offset by state income taxes in both periods.

Unrecognized Tax Benefits and Other Considerations

The total amount of our unrecognized tax benefits at July 31, 2014 was $40 million. Net of related deferred tax assets, unrecognized tax benefits were $26 million at that date. If we were to recognize these net benefits, our income tax expense would reflect a favorable net impact of $26 million. There were no material changes to these amounts during the nine months ended April 30, 2015. We do not believe that it is reasonably possible that there will be a significant increase or decrease in our unrecognized tax benefits over the next 12 months.