Composition Of Certain Financial Statement Captions (Schedule Of Amortized Cost And Estimated Fair Value Of Short-Term And Long-Term Available-For-Sale Investments Based On Stated Maturities) (Details) (USD $) In Thousands | Sep. 30, 2011 | Sep. 24, 2010 |
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| Composition Of Certain Financial Statement Captions [Abstract] | ||
| Amortized Cost, due within 1 year | $ 390,559 | $ 289,082 |
| Amortized Cost, due in 1 to 2 years | 213,487 | 183,130 |
| Amortized Cost, due in 2 to 3 years | 58,947 | 18,301 |
| Amortized Cost, total | 662,993 | 490,513 |
| Fair Value, due within 1 year | 391,281 | 289,755 |
| Fair Value, due in 1 to 2 years | 213,921 | 184,891 |
| Fair Value, due in 2 to 3 years | 58,876 | 18,460 |
| Fair Value, total | $ 664,078 | $ 493,106 |
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- Definition This item represents debt securities, at cost, net of adjustments including accretion, amortization, collection of cash, previous other-than-temporary impairments recognized in earnings (less any cumulative-effect adjustments, as defined), and fair value hedge accounting adjustments, if any, which are expected to mature after one year and through Two years from the balance sheet date and which are categorized neither as held-to-maturity nor trading securities.
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- Definition This item represents the fair value of debt securities which are expected to mature after one year and through two years from the balance sheet date and which are categorized neither as held-to-maturity nor trading securities.
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- Definition This item represents debt securities, at cost, net of adjustments including accretion, amortization, collection of cash, previous other-than-temporary impairments recognized in earnings (less any cumulative-effect adjustments, as defined), and fair value hedge accounting adjustments, if any, which are expected to mature after two year and through three years from the balance sheet date and which are categorized neither as held-to-maturity nor trading securities.
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- Definition This item represents the fair value of debt securities which are expected to mature after two year and through three years from the balance sheet date and which are categorized neither as held-to-maturity nor trading securities.
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- Definition Composition Of Certain Financial Statement Captions [Abstract]
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- Definition This item represents the total of all debt securities grouped by maturity dates, at cost, net of adjustments including accretion, amortization, collection of cash, previous other-than-temporary impairments recognized in earnings (less any cumulative-effect adjustments, as defined), and fair value hedge accounting adjustments, if any, which are classified neither as held-to-maturity nor trading securities. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition This item represents debt securities, at cost, net of adjustments including accretion, amortization, collection of cash, previous other-than-temporary impairments recognized in earnings (less any cumulative-effect adjustments, as defined), and fair value hedge accounting adjustments, if any, which are expected to mature within one year of the balance sheet date and which are categorized neither as held-to-maturity nor trading securities. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition This item represents the fair value of debt securities which are expected to mature within one year of the balance sheet date and which are categorized neither as held-to-maturity nor trading securities. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition For an unclassified balance sheet, total of debt securities categorized neither as held-to-maturity nor trading. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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