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Composition Of Certain Financial Statement Captions (Schedule Of Other Non-Current Liabilities) (Details) (USD $) In Thousands, unless otherwise specified | Mar. 27, 2015 | Sep. 26, 2014
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Composition Of Certain Financial Statement Captions [Abstract] |  |
Supplemental retirement plan obligations | $ 2,400 us-gaap_OtherPostretirementBenefitsPayableNoncurrent | $ 2,409 us-gaap_OtherPostretirementBenefitsPayableNoncurrent
Non-current tax liabilities | 49,180 dlb_NonCurrentTaxLiabilities | 30,715 dlb_NonCurrentTaxLiabilities
Other liabilities | 13,135 us-gaap_OtherLiabilities | 10,591 us-gaap_OtherLiabilities
Other non-current liabilities | $ 64,715 us-gaap_OtherLiabilitiesNoncurrent | $ 43,715 us-gaap_OtherLiabilitiesNoncurrent

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- Definition Non-Current Tax Liabilities + References No definition available. + Details
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- Definition The aggregate carrying amount, as of the balance sheet date, of liabilities not separately disclosed in the balance sheet. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 03 -Paragraph 15 -Article 9 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 210.9-03.15) -URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878 + Details
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- Definition Aggregate carrying amount, as of the balance sheet date, of noncurrent obligations not separately disclosed in the balance sheet. Noncurrent liabilities are expected to be paid after one year (or the normal operating cycle, if longer). + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.24) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 24 -Article 5 + Details
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- Definition The total amount of the entity's noncurrent obligation as of the balance sheet date under any other retirement plan(s), such as one or more defined contribution plans. + References No definition available. + Details
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