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Marketable Securities Additional Information (Details) - Equity securities - USD ($) $ in Millions | 3 Months Ended |  |
--- | --- | --- | ---
Dec. 26, 2015 | Mar. 26, 2016 | Sep. 26, 2015
Schedule of Available-for-sale Securities [Line Items] |  |  |
Realized Gain (Loss) on Marketable Securities, Cost Method Investments, and Other Investments | $ (25.1) |  |
Other than temporary impairment |  | $ 0.0 | $ 7.8

X
- Definition Other than temporary impairment + References No definition available. + Details
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X
- Definition This item represents the total realized gain (loss) included in earnings for the period as a result of selling marketable securities categorized as trading, available-for-sale, or held-to-maturity and any gains or losses realized during the period from the sale of investments accounted for under the cost method of accounting and/or investments that are separately or otherwise not categorized as trading, available-for-sale, or held-to-maturity. Additionally, this item would include any losses recognized for other than temporary impairments (OTTI) of the subject investments in debt and equity securities. + References No definition available. + Details
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- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References No definition available. + Details
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- Details
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