Income Taxes	3 Months Ended
Nov. 30, 2013
Income Tax Disclosure [Abstract]
Income Taxes	Income Taxes We determine our interim income tax provision by estimating our effective income tax rate expected to be applicable for the full fiscal year. Our effective income tax rate is dependent upon several factors, such as tax rates in state and foreign jurisdictions and the relative amount of income we earn in such jurisdictions. In determining our full year estimate, we do not include the estimated impact of unusual and/or infrequent items, which may cause significant variations in the customary relationship between income tax expense and income before income taxes. We exercise significant judgment in determining our income tax provision due to transactions, credits and calculations where the ultimate tax determination is uncertain. Our U.S. federal income tax returns for fiscal year 2012 and 2011 are currently under review by the Internal Revenue Service (“IRS”). In addition, we are participating in the IRS’s Compliance Assurance Process for fiscal year 2014, which is a voluntary program in which taxpayers seek to resolve all or most issues with the IRS prior to or soon after filing their U.S. federal income tax returns. We are also subject to numerous ongoing audits by state, local and foreign tax authorities. Although we believe our tax accruals are reasonable, the final determination of tax returns under review or returns that may be reviewed in the future and any related litigation could result in tax liabilities that materially differ from our historical income tax provisions and accruals.

Income Taxes

3 Months Ended

Nov. 30, 2013

We determine our interim income tax provision by estimating our effective income tax rate expected to be applicable for the full fiscal year. Our effective income tax rate is dependent upon several factors, such as tax rates in state and foreign jurisdictions and the relative amount of income we earn in such jurisdictions. In determining our full year estimate, we do not include the estimated impact of unusual and/or infrequent items, which may cause significant variations in the customary relationship between income tax expense and income before income taxes. We exercise significant judgment in determining our income tax provision due to transactions, credits and calculations where the ultimate tax determination is uncertain.

Our U.S. federal income tax returns for fiscal year 2012 and 2011 are currently under review by the Internal Revenue Service (“IRS”). In addition, we are participating in the IRS’s Compliance Assurance Process for fiscal year 2014, which is a voluntary program in which taxpayers seek to resolve all or most issues with the IRS prior to or soon after filing their U.S. federal income tax returns. We are also subject to numerous ongoing audits by state, local and foreign tax authorities. Although we believe our tax accruals are reasonable, the final determination of tax returns under review or returns that may be reviewed in the future and any related litigation could result in tax liabilities that materially differ from our historical income tax provisions and accruals.