Income Taxes	9 Months Ended
Apr. 30, 2011
Income Taxes [Abstract]
Income Taxes	9. 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. Our effective tax rate for the three months ended April 30, 2011 was approximately 35% and did not differ significantly from the statutory rate. State income taxes were substantially offset by the benefit we received from the domestic production activities deduction and the federal research and experimentation credit. Our effective tax rate for the three months ended April 30, 2010 was approximately 34%. In that quarter we recorded discrete tax benefits that were primarily related to foreign tax credit benefits associated with the distribution of profits from our non-U.S. subsidiaries and our plans to indefinitely reinvest substantially all remaining non-U.S. earnings in support of our international expansion plans. Excluding those discrete benefits, our effective tax rate for that period was approximately 37%. This differed from the federal statutory rate of 35% primarily due to state income taxes, which were partially offset by the benefit we received from the domestic production activities deduction and the federal research and experimentation credit. Our effective tax rate for the nine months ended April 30, 2011 was approximately 34%. Excluding discrete tax benefits primarily related to the retroactive reinstatement of the federal research and experimentation credit as described below, our effective tax rate for that period was approximately 35% and did not differ significantly from the statutory rate. State income taxes were substantially offset by the benefit we received from the domestic production activities deduction and the federal research and experimentation credit. Our effective tax rate for the nine months ended April 30, 2010 was approximately 34%. In that period we recorded discrete tax benefits as described above. Excluding those discrete tax benefits, our effective tax rate for that period was approximately 37%. This differed from the federal statutory rate of 35% primarily due to state income taxes, which were partially offset by the benefit we received from the domestic production activities deduction and the federal research and experimentation credit. In December 2010 the Tax Relief, Unemployment Insurance Reauthorization, and Jobs Creation Act of 2010 was signed into law. The Act includes a reinstatement of the federal research and experimentation credit through December 31, 2011 that was retroactive to January 1, 2010. We recorded a discrete tax benefit of approximately $9 million for the retroactive amount related to fiscal 2010 and the first quarter of fiscal 2011 during the second quarter of fiscal 2011. Unrecognized Tax Benefits and Other Considerations The total amount of our unrecognized tax benefits at July 31, 2010 was $35 million. Net of related deferred tax assets, unrecognized tax benefits were $30 million at that date. If we were to recognize these net benefits, our income tax expense would reflect a favorable net impact of $30 million. There were no material changes to these amounts during the nine months ended April 30, 2011. 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.

9. 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. Our effective tax rate for the three months ended April 30, 2011 was approximately 35% and did not differ significantly from the statutory rate. State income taxes were substantially offset by the benefit we received from the domestic production activities deduction and the federal research and experimentation credit. Our effective tax rate for the three months ended April 30, 2010 was approximately 34%. In that quarter we recorded discrete tax benefits that were primarily related to foreign tax credit benefits associated with the distribution of profits from our non-U.S. subsidiaries and our plans to indefinitely reinvest substantially all remaining non-U.S. earnings in support of our international expansion plans. Excluding those discrete benefits, our effective tax rate for that period was approximately 37%. This differed from the federal statutory rate of 35% primarily due to state income taxes, which were partially offset by the benefit we received from the domestic production activities deduction and the federal research and experimentation credit.

Our effective tax rate for the nine months ended April 30, 2011 was approximately 34%. Excluding discrete tax benefits primarily related to the retroactive reinstatement of the federal research and experimentation credit as described below, our effective tax rate for that period was approximately 35% and did not differ significantly from the statutory rate. State income taxes were substantially offset by the benefit we received from the domestic production activities deduction and the federal research and experimentation credit. Our effective tax rate for the nine months ended April 30, 2010 was approximately 34%. In that period we recorded discrete tax benefits as described above. Excluding those discrete tax benefits, our effective tax rate for that period was approximately 37%. This differed from the federal statutory rate of 35% primarily due to state income taxes, which were partially offset by the benefit we received from the domestic production activities deduction and the federal research and experimentation credit.

In December 2010 the Tax Relief, Unemployment Insurance Reauthorization, and Jobs Creation Act of 2010 was signed into law. The Act includes a reinstatement of the federal research and experimentation credit through December 31, 2011 that was retroactive to January 1, 2010. We recorded a discrete tax benefit of approximately $9 million for the retroactive amount related to fiscal 2010 and the first quarter of fiscal 2011 during the second quarter of fiscal 2011.

Unrecognized Tax Benefits and Other Considerations

The total amount of our unrecognized tax benefits at July 31, 2010 was $35 million. Net of related deferred tax assets, unrecognized tax benefits were $30 million at that date. If we were to recognize these net benefits, our income tax expense would reflect a favorable net impact of $30 million. There were no material changes to these amounts during the nine months ended April 30, 2011. 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.