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Related Party Transactions (Details) (USD $) In Millions, unless otherwise specified | 12 Months Ended
--- | ---
Sep. 27, 2014 | Sep. 28, 2013
Equity, Class of Treasury Stock [Line Items] |  |
Short-term non-interest bearing loans to investment/profit sharing plan | $ 0.4 us-gaap_LoansAndLeasesReceivableRelatedParties |
Shares authorized for repurchase |  | 4.0 us-gaap_StockRepurchaseProgramNumberOfSharesAuthorizedToBeRepurchased
Class B Common Stock [Member] |  |
Equity, Class of Treasury Stock [Line Items] |  |
Shares authorized for repurchase | 2.5 us-gaap_StockRepurchaseProgramNumberOfSharesAuthorizedToBeRepurchased / us-gaap_StatementClassOfStockAxis = us-gaap_CommonClassBMember | 1.5 us-gaap_StockRepurchaseProgramNumberOfSharesAuthorizedToBeRepurchased / us-gaap_StatementClassOfStockAxis = us-gaap_CommonClassBMember
Purchase price of shares | $ 65.0 us-gaap_StockRepurchaseProgramAuthorizedAmount / us-gaap_StatementClassOfStockAxis = us-gaap_CommonClassBMember | $ 37.1 us-gaap_StockRepurchaseProgramAuthorizedAmount / us-gaap_StatementClassOfStockAxis = us-gaap_CommonClassBMember

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- Definition For an unclassified balance sheet, reflects the carrying amount of unpaid loan amounts due from related parties at the balance sheet date. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 850 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (d) -URI http://asc.fasb.org/extlink&oid=6457730&loc=d3e39549-107864 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-03.7(e)) -URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 03 -Paragraph 7 -Subparagraph e -Article 9 + Details
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- Definition The number of shares authorized to be repurchased by an entity's Board of Directors under a stock repurchase plan. + References No definition available. + Details
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