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Description Of Business And Basis Of Presentation (Policies)
3 Months Ended
Dec. 29, 2017
Organization, Consolidation and Presentation of Financial Statements [Abstract]  
Fiscal Period
The Company’s fiscal year ends on the Friday closest to September 30. Fiscal year 2018 consists of 52 weeks and ends on September 28, 2018. Fiscal year 2017 consisted of 52 weeks and ended on September 29, 2017. The first quarters of fiscal year 2018 and fiscal year 2017 each consisted of 13 weeks and ended on December 29, 2017, and December 30, 2016, respectively.

Recently Adopted Accounting Pronouncements
Recently Adopted Accounting Pronouncements

In March 2016, the Financial Accounting Standards Board ("FASB") issued Accounting Standards Update ("ASU") 2016-09, Improvements to Employee Share-Based Payment Accounting, which is intended to simplify several aspects of the accounting for share-based payment transactions, including the income tax consequences, classification of awards as either equity or liabilities, and classification on the statement of cash flows. The Company adopted ASU 2016-09 at the beginning of the first quarter of fiscal year 2018. As a result of adoption, the Company recognized a discrete income tax benefit of $16.2 million to the income tax provision for excess tax benefits generated by the settlement of share-based awards in the first quarter of fiscal year 2018. The adoption also resulted in an increase in cash flow from operations and a decrease of cash flow from financing of $16.2 million in the first quarter of fiscal year 2018. Prior periods have not been adjusted.  The Company has elected to account for forfeitures as they occur and will no longer estimate future forfeitures.  The change in accounting for forfeitures was applied using a modified retrospective transition method and resulted in a cumulative-effect adjustment to retained earnings as of the beginning of the first quarter of fiscal year 2018 in the amount of $1.9 million.  Forfeitures in the future will now be recorded as a benefit in the period they are realized.