Income Taxes	6 Months Ended
Feb. 24, 2018
Income Tax Disclosure [Abstract]
Income Taxes	Income Taxes In accordance with ASC 740, Income Taxes (“ASC 740”), each interim period is considered integral to the annual period, and tax expense is measured using an estimated annual effective tax rate. An entity is required to record income tax expense each quarter based on its annual effective tax rate estimated for the full fiscal year and use that rate to provide for income taxes on a current year-to-date basis, adjusted for discrete taxable events that occur during the interim period. The Company’s effective tax rate for the thirteen weeks ended February 24, 2018 was (34.0)% compared to a provision of 39.8% for the corresponding period in the prior year. The Company’s effective tax rate for the twenty-six weeks ended February 24, 2018 was 4.2% compared to 39.2% for the corresponding period in the prior year. The reduction in the effective tax rates in the thirteen and twenty-six weeks ended February 24, 2018 as compared to the corresponding periods in the prior year was due primarily to the impact of the Act enacted on December 22, 2017. As a result of this law, U.S. corporations will be subject to lower income tax rates, which also caused the Company to remeasure its U.S. net deferred tax liabilities at the lower rates. The remeasurement of the Company's net deferred tax assets and liabilities resulted in an estimated net benefit of $22.7 million recorded to the Company’s provision for income taxes. Also because of this law, the Company will be subject to a one-time transition tax for the deemed repatriation of its foreign earnings. The Company recorded an estimated charge of $2.5 million for this transition tax which partially offset the benefit mentioned above. For the thirteen and twenty-six weeks ended February 24, 2018, the Company’s effective tax rates also were lower than the statutory tax rate due to the tax benefit from restricted stock units upon vesting. U.S. Tax Reform The Act reduces the U.S. federal corporate income tax rate from 35% to 21%, requires companies to pay a one-time transition tax on earnings of certain foreign subsidiaries that were previously tax deferred, and creates new taxes on certain foreign sourced earnings. As of February 24, 2018, the Company had not completed its accounting for the tax effects of enactment of the Act; however, as described below, the Company has made a reasonable estimate of the effects on its existing deferred tax balances and the one-time transition tax, and recognized a provisional net benefit of $20.2 million, which is included in income tax expense for the thirteen and twenty-six weeks ended February 24, 2018. On December 22, 2017, the SEC issued Staff Accounting Bulletin No. 118, Income Tax Accounting Implications of the Act (“SAB 118”) directing SEC registrants to consider the impact of the U.S. legislation as “provisional” when they do not have the necessary information available, prepared or analyzed (including computations) in reasonable detail to complete their accounting for the change in tax law. In accordance with SAB 118, the amounts recorded related to accounting for the Act represent the Company’s best estimate based on its interpretation of the U.S. legislation as the Company is still accumulating data to finalize the underlying calculations, or in certain cases, the U.S. Treasury is expected to issue further guidance on the application of certain provisions of the U.S. legislation. In addition, we also used assumptions and estimates that may change as a result of future guidance and interpretation from the Internal Revenue Service, the SEC, the FASB and various other taxing jurisdictions. In particular, we anticipate that the U.S. state jurisdictions will continue to determine and announce their conformity or decoupling from the Act, either in its entirety or with respect to specific provisions. All of these potential legislative and interpretive actions could result in adjustments to our provisional estimates when the accounting for the income tax effects of the Act is completed. In the thirteen and twenty-six weeks ended February 24, 2018, the Company revised its estimated annual effective rate to reflect a change in the federal statutory income tax rate from 35% to 21%. The rate change is administratively effective at the beginning of the Company’s fiscal year, using a blended rate for the annual period. The Company's blended federal statutory income tax rate for fiscal 2018 is 25.9%. The Company re-measured certain deferred tax assets and liabilities based on the rates at which they are expected to reverse in the future, which is 25.9% for fiscal 2018 reversals and 21% for post-fiscal 2018 reversals. However, the Company is still analyzing certain aspects of the Act and refining its calculations, which could potentially affect the measurement of these balances or potentially give rise to new deferred tax amounts. The provisional net benefit amount recorded related to the re-measurement of the Company’s deferred tax balance was $22.7 million. The one-time transition tax is based on the Company’s total post-1986 earnings and profits (“E&P”) which were previously deferred from U.S. income taxes. The Company recorded a provisional amount for its one-time transition tax liability related to the deemed repatriation of the earnings of its foreign subsidiaries, resulting in an increase in income tax expense of $2.5 million in the thirteen and twenty-six weeks ended February 24, 2018. The Company has not yet finalized its calculation of the total post-1986 foreign E&P for these foreign subsidiaries. Further, the transition tax is based in part on the amount of those earnings held in cash and other specified assets. This amount may change when the Company finalizes the calculation of its post-1986 foreign E&P previously deferred from U.S. federal taxation and finalizes the amounts held in cash or other specified assets. No additional income taxes have been provided for any remaining undistributed foreign earnings not subject to the transition tax and any additional outside basis difference inherent in these entities as these amounts continue to be indefinitely reinvested in foreign operations. The Company continues to evaluate this assertion in its ongoing analysis of the effects of tax reform on the Company's strategic initiatives. The Company believes that determining the amount of unrecognized deferred tax liability related to any remaining undistributed foreign earnings not subject to the transition tax and additional outside basis difference in these entities (i.e., basis difference in excess of that subject to the one-time transition tax) is not practicable. Uncertain tax positions The Company recognizes interest and penalties related to uncertain tax positions as a component of income tax expense which is consistent with the recognition of these items in prior reporting periods. During the thirteen and twenty-six weeks ended February 24, 2018, there were no material changes in the amount of unrecognized tax benefits or the amount accrued for interest and penalties. All U.S. and Canadian federal income tax statutes have lapsed for filings up to and including fiscal years 2012 and 2009, respectively, and the Company has concluded an audit of U.S. federal income taxes for 2010 and 2011. With a few exceptions, the Company is no longer subject to state and local income tax examinations for periods prior to fiscal 2013. The Company is not aware of any tax positions for which it is reasonably possible that the total amounts of unrecognized tax benefits will change significantly in the next 12 months.

Income Taxes

In accordance with ASC 740, Income Taxes (“ASC 740”), each interim period is considered integral to the annual period, and tax expense is measured using an estimated annual effective tax rate. An entity is required to record income tax expense each quarter based on its annual effective tax rate estimated for the full fiscal year and use that rate to provide for income taxes on a current year-to-date basis, adjusted for discrete taxable events that occur during the interim period.

The Company’s effective tax rate for the thirteen weeks ended February 24, 2018 was (34.0)% compared to a provision of 39.8% for the corresponding period in the prior year. The Company’s effective tax rate for the twenty-six weeks ended February 24, 2018 was 4.2% compared to 39.2% for the corresponding period in the prior year. The reduction in the effective tax rates in the thirteen and twenty-six weeks ended February 24, 2018 as compared to the corresponding periods in the prior year was due primarily to the impact of the Act enacted on December 22, 2017. As a result of this law, U.S. corporations will be subject to lower income tax rates, which also caused the Company to remeasure its U.S. net deferred tax liabilities at the lower rates. The remeasurement of the Company's net deferred tax assets and liabilities resulted in an estimated net benefit of $22.7 million recorded to the Company’s provision for income taxes. Also because of this law, the Company will be subject to a one-time transition tax for the deemed repatriation of its foreign earnings. The Company recorded an estimated charge of $2.5 million for this transition tax which partially offset the benefit mentioned above. For the thirteen and twenty-six weeks ended February 24, 2018, the Company’s effective tax rates also were lower than the statutory tax rate due to the tax benefit from restricted stock units upon vesting.

U.S. Tax Reform

The Act reduces the U.S. federal corporate income tax rate from 35% to 21%, requires companies to pay a one-time transition tax on earnings of certain foreign subsidiaries that were previously tax deferred, and creates new taxes on certain foreign sourced earnings.

As of February 24, 2018, the Company had not completed its accounting for the tax effects of enactment of the Act; however, as described below, the Company has made a reasonable estimate of the effects on its existing deferred tax balances and the one-time transition tax, and recognized a provisional net benefit of $20.2 million, which is included in income tax expense for the thirteen and twenty-six weeks ended February 24, 2018.

On December 22, 2017, the SEC issued Staff Accounting Bulletin No. 118, Income Tax Accounting Implications of the Act (“SAB 118”) directing SEC registrants to consider the impact of the U.S. legislation as “provisional” when they do not have the necessary information available, prepared or analyzed (including computations) in reasonable detail to complete their accounting for the change in tax law. In accordance with SAB 118, the amounts recorded related to accounting for the Act represent the Company’s best estimate based on its interpretation of the U.S. legislation as the Company is still accumulating data to finalize the underlying calculations, or in certain cases, the U.S. Treasury is expected to issue further guidance on the application of certain provisions of the U.S. legislation. In addition, we also used assumptions and estimates that may change as a result of future guidance and interpretation from the Internal Revenue Service, the SEC, the FASB and various other taxing jurisdictions. In particular, we anticipate that the U.S. state jurisdictions will continue to determine and announce their conformity or decoupling from the Act, either in its entirety or with respect to specific provisions. All of these potential legislative and interpretive actions could result in adjustments to our provisional estimates when the accounting for the income tax effects of the Act is completed.

In the thirteen and twenty-six weeks ended February 24, 2018, the Company revised its estimated annual effective rate to reflect a change in the federal statutory income tax rate from 35% to 21%. The rate change is administratively effective at the beginning of the Company’s fiscal year, using a blended rate for the annual period. The Company's blended federal statutory income tax rate for fiscal 2018 is 25.9%.

The Company re-measured certain deferred tax assets and liabilities based on the rates at which they are expected to reverse in the future, which is 25.9% for fiscal 2018 reversals and 21% for post-fiscal 2018 reversals. However, the Company is still analyzing certain aspects of the Act and refining its calculations, which could potentially affect the measurement of these balances or potentially give rise to new deferred tax amounts. The provisional net benefit amount recorded related to the re-measurement of the Company’s deferred tax balance was $22.7 million.

The one-time transition tax is based on the Company’s total post-1986 earnings and profits (“E&P”) which were previously deferred from U.S. income taxes. The Company recorded a provisional amount for its one-time transition tax liability related to the deemed repatriation of the earnings of its foreign subsidiaries, resulting in an increase in income tax expense of $2.5 million in the thirteen and twenty-six weeks ended February 24, 2018. The Company has not yet finalized its calculation of the total post-1986 foreign E&P for these foreign subsidiaries. Further, the transition tax is based in part on the amount of those earnings held in cash and other specified assets. This amount may change when the Company finalizes the calculation of its post-1986 foreign E&P previously deferred from U.S. federal taxation and finalizes the amounts held in cash or other specified assets. No additional income taxes have been provided for any remaining undistributed foreign earnings not subject to the transition tax and any additional outside basis difference inherent in these entities as these amounts continue to be indefinitely reinvested in foreign operations. The Company continues to evaluate this assertion in its ongoing analysis of the effects of tax reform on the Company's strategic initiatives. The Company believes that determining the amount of unrecognized deferred tax liability related to any remaining undistributed foreign earnings not subject to the transition tax and additional outside basis difference in these entities (i.e., basis difference in excess of that subject to the one-time transition tax) is not practicable.

Uncertain tax positions

The Company recognizes interest and penalties related to uncertain tax positions as a component of income tax expense which is consistent with the recognition of these items in prior reporting periods. During the thirteen and twenty-six weeks ended February 24, 2018, there were no material changes in the amount of unrecognized tax benefits or the amount accrued for interest and penalties.

All U.S. and Canadian federal income tax statutes have lapsed for filings up to and including fiscal years 2012 and 2009, respectively, and the Company has concluded an audit of U.S. federal income taxes for 2010 and 2011. With a few exceptions, the Company is no longer subject to state and local income tax examinations for periods prior to fiscal 2013. The Company is not aware of any tax positions for which it is reasonably possible that the total amounts of unrecognized tax benefits will change significantly in the next 12 months.