Income Taxes	3 Months Ended
Oct. 31, 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. Our effective tax rate for the three months ended October 31, 2015 was approximately 22%. Excluding discrete tax items primarily related to share-based compensation as well as including the effects of losses in certain jurisdictions where we do not recognize a tax benefit, our effective tax rate for the three months ended October 31, 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. Our effective tax rate for the three months ended October 31, 2014 was approximately 31%. Excluding discrete tax items primarily related to share-based compensation and a state tax law change as well as including the effects of losses in certain jurisdictions where we do not recognize a tax benefit, our effective tax rate for the period was approximately 37% 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. Unrecognized Tax Benefits and Other Considerations The total amount of our unrecognized tax benefits at July 31, 2015 was $56 million. Net of related deferred tax assets, unrecognized tax benefits were $37 million at that date. If we were to recognize these net benefits, our income tax expense would reflect a favorable net impact of $37 million. There were no material changes to these amounts during the three months ended October 31, 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.

Our effective tax rate for the three months ended October 31, 2015 was approximately 22%. Excluding discrete tax items primarily related to share-based compensation as well as including the effects of losses in certain jurisdictions where we do not recognize a tax benefit, our effective tax rate for the three months ended October 31, 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.

Our effective tax rate for the three months ended October 31, 2014 was approximately 31%. Excluding discrete tax items primarily related to share-based compensation and a state tax law change as well as including the effects of losses in certain jurisdictions where we do not recognize a tax benefit, our effective tax rate for the period was approximately 37% 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.

Unrecognized Tax Benefits and Other Considerations

The total amount of our unrecognized tax benefits at July 31, 2015 was $56 million. Net of related deferred tax assets, unrecognized tax benefits were $37 million at that date. If we were to recognize these net benefits, our income tax expense would reflect a favorable net impact of $37 million. There were no material changes to these amounts during the three months ended October 31, 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.