Income Taxes	6 Months Ended
Feb. 28, 2015
Income Tax Disclosure [Abstract]
Income Taxes	Income Taxes We determine our interim income tax provision by applying our estimated effective income tax rate expected to be applicable for the full fiscal year to our income before income taxes for the period. 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 return for fiscal year 2013 is currently open for review by the Internal Revenue Service (“IRS”) and we are participating in the IRS’s Compliance Assurance Process for fiscal years 2014 and 2015, 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 with various tax years as early as 2007 that remain subject to examination. 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

6 Months Ended

Feb. 28, 2015

We determine our interim income tax provision by applying our estimated effective income tax rate expected to be applicable for the full fiscal year to our income before income taxes for the period. 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 return for fiscal year 2013 is currently open for review by the Internal Revenue Service (“IRS”) and we are participating in the IRS’s Compliance Assurance Process for fiscal years 2014 and 2015, 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 with various tax years as early as 2007 that remain subject to examination. 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.