Fair Value Measurements (Assets And Liabilities Measured At Fair Value On A Recurring Basis) (Details) (USD $) In Millions	Jul. 03, 2011	Oct. 03, 2010
Short-term investments - available-for-sale securities	$ 173.6	$ 236.5
Short-term investments - trading securities	58.1	49.2
Total short-term investments	231.7	285.7
Long-term investments - available-for-sale securities	89.6	191.8
Total	321.3	477.5
Derivatives	25.9	34.7
Agency Obligations [Member]
Short-term investments - available-for-sale securities	10.0	30.0
Long-term investments - available-for-sale securities		27.0
Agency Obligations [Member] \| Quoted Prices in Active Markets for Identical Assets (Level 1) [Member]
Short-term investments - available-for-sale securities	0	0
Long-term investments - available-for-sale securities		0
Agency Obligations [Member] \| Significant Other Observable Inputs (Level 2) [Member]
Short-term investments - available-for-sale securities	10.0	30.0
Long-term investments - available-for-sale securities		27.0
Agency Obligations [Member] \| Significant Unobservable Inputs (Level 3) [Member]
Short-term investments - available-for-sale securities	0	0
Long-term investments - available-for-sale securities		0
Commercial Paper [Member]
Short-term investments - available-for-sale securities	50.0
Commercial Paper [Member] \| Quoted Prices in Active Markets for Identical Assets (Level 1) [Member]
Short-term investments - available-for-sale securities	0
Commercial Paper [Member] \| Significant Other Observable Inputs (Level 2) [Member]
Short-term investments - available-for-sale securities	50.0
Commercial Paper [Member] \| Significant Unobservable Inputs (Level 3) [Member]
Short-term investments - available-for-sale securities	0
Corporate Debt Securities [Member]
Short-term investments - available-for-sale securities	73.6	15.0
Long-term investments - available-for-sale securities	61.7	123.5
Corporate Debt Securities [Member] \| Quoted Prices in Active Markets for Identical Assets (Level 1) [Member]
Short-term investments - available-for-sale securities	0	0
Long-term investments - available-for-sale securities	0	0
Corporate Debt Securities [Member] \| Significant Other Observable Inputs (Level 2) [Member]
Short-term investments - available-for-sale securities	73.6	15.0
Long-term investments - available-for-sale securities	61.7	123.5
Corporate Debt Securities [Member] \| Significant Unobservable Inputs (Level 3) [Member]
Short-term investments - available-for-sale securities	0	0
Long-term investments - available-for-sale securities	0	0
Government Treasury Securities [Member]
Short-term investments - available-for-sale securities	40.0	190.8
Government Treasury Securities [Member] \| Quoted Prices in Active Markets for Identical Assets (Level 1) [Member]
Short-term investments - available-for-sale securities	40.0	190.8
Government Treasury Securities [Member] \| Significant Other Observable Inputs (Level 2) [Member]
Short-term investments - available-for-sale securities	0	0
Government Treasury Securities [Member] \| Significant Unobservable Inputs (Level 3) [Member]
Short-term investments - available-for-sale securities	0	0
State and Local Government Obligations [Member]
Short-term investments - available-for-sale securities		0.7
Long-term investments - available-for-sale securities	27.9	41.3
State and Local Government Obligations [Member] \| Quoted Prices in Active Markets for Identical Assets (Level 1) [Member]
Short-term investments - available-for-sale securities		0
Long-term investments - available-for-sale securities	0	0
State and Local Government Obligations [Member] \| Significant Other Observable Inputs (Level 2) [Member]
Short-term investments - available-for-sale securities		0.7
Long-term investments - available-for-sale securities	0	0
State and Local Government Obligations [Member] \| Significant Unobservable Inputs (Level 3) [Member]
Short-term investments - available-for-sale securities		0
Long-term investments - available-for-sale securities	27.9	41.3
Quoted Prices in Active Markets for Identical Assets (Level 1) [Member]
Short-term investments - available-for-sale securities	40.0	190.8
Short-term investments - trading securities	58.1	49.2
Total short-term investments	98.1	240.0
Long-term investments - available-for-sale securities	0	0
Total	98.1	240.0
Derivatives	0	0
Significant Other Observable Inputs (Level 2) [Member]
Short-term investments - available-for-sale securities	133.6	45.7
Short-term investments - trading securities	0	0
Total short-term investments	133.6	45.7
Long-term investments - available-for-sale securities	61.7	150.5
Total	195.3	196.2
Derivatives	25.9	34.7
Significant Unobservable Inputs (Level 3) [Member]
Short-term investments - available-for-sale securities	0	0
Short-term investments - trading securities	0	0
Total short-term investments	0	0
Long-term investments - available-for-sale securities	27.9	41.3
Total	27.9	41.3
Derivatives	$ 0	$ 0

Investments in debt and equity securities which are categorized neither as trading securities nor held-to-maturity securities and which are intended be sold or mature within one year from the balance sheet date or the normal operating cycle, whichever is longer. Such securities are reported at fair value; unrealized gains (losses) related to Available-for-sale Securities are excluded from earnings and reported in a separate component of shareholders' equity (other comprehensive income), unless the Available-for-sale security is designated as a hedge or is determined to have had an other than temporary decline in fair value below its amortized cost basis. All or a portion of the unrealized holding gain (loss) of an Available-for-sale security that is designated as being hedged in a fair value hedge is recognized in earnings during the period of the hedge, as are other than temporary declines in fair value below the cost basis for investments in equity securities and debt securities that an entity intends to sell or it is more likely than not that it will be required to sell before the recovery of its amortized cost basis. Other than temporary declines in fair value below the cost basis for debt securities categorized as Available-for-sale that an entity does not intend to sell and for which it is not more likely than not that the entity will be required to sell before the recovery of its amortized cost basis are bifurcated into credit losses and losses related to all other factors. Other than temporary declines in fair value below cost basis related to credit losses are recognized in earnings, and losses related to all other factors are recognized in other comprehensive income.

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
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Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
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Reference 5: http://www.xbrl.org/2003/role/presentationRef
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Reference 7: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
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-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 8: http://www.xbrl.org/2003/role/presentationRef
-Publisher AICPA
-Name Accounting Research Bulletin (ARB)
-Number 43
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-Section A
-Paragraph 4, 5
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Reference 9: http://www.xbrl.org/2003/role/presentationRef
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-Section 25
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+ Details

- Definition

Investments in debt and equity securities which are categorized neither as held-to-maturity nor trading and which are intended to be sold or mature more than one year from the balance sheet date or operating cycle, if longer. Such securities are reported at fair value; unrealized gains (losses) related to Available-for-sale Securities are excluded from earnings and reported in a separate component of shareholders' equity (other comprehensive income), unless the Available-for-sale security is designated as a hedge or is determined to have had an other than temporary decline in fair value below its amortized cost basis. All or a portion of the unrealized holding gain (loss) of an Available-for-sale security that is designated as being hedged in a fair value hedge is recognized in earnings during the period of the hedge, as are other than temporary declines in fair value below the cost basis for investments in equity securities and debt securities that an entity intends to sell or it is more likely than not that it will be required to sell before the recovery of its amortized cost basis. Other than temporary declines in fair value below the cost basis for debt securities categorized as Available-for-sale that an entity does not intend to sell and for which it is not more likely than not that the entity will be required to sell before the recovery of its amortized cost basis are bifurcated into credit losses and losses related to all other factors. Other than temporary declines in fair value below cost basis related to credit losses are recognized in earnings, and losses related to all other factors are recognized in other comprehensive income.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
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Reference 3: http://www.xbrl.org/2003/role/presentationRef
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Reference 5: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
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Reference 6: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Glossary Available-for-Sale Securities
-URI http://asc.fasb.org/extlink&oid=6505594

Reference 7: http://www.xbrl.org/2003/role/presentationRef
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+ Details

- Definition

Derivative instrument obligations meeting the definition of a liability which the Company is a party to as of the balance sheet date.

+ References+ Details

- Definition

Financial instruments that are bought and held principally for the purpose of selling them in the near term (thus held for only a short period of time, usually less than one year or the normal operating cycle, whichever is longer) or for debt and equity securities formerly categorized as available-for-sale or held-to-maturity which the entity held as of the date it opted to account for such securities at fair value. An enterprise may also categorize such a security as trading without the intent to sell it in the near term assuming the decision to categorize the security as trading occurred at acquisition.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
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Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
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-Number 159
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Reference 5: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Glossary Trading Securities
-URI http://asc.fasb.org/extlink&oid=6526789

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+ Details