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Significant Accounting Policies (Pass-Through Costs Included In Revenues) (Details) (USD $) In Millions | 12 Months Ended
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Sep. 30, 2011 | Oct. 01, 2010 | Oct. 02, 2009
Significant Accounting Policies |  |  |
Pass-through costs included in revenues | $ 2,118.5 | $ 2,723.3 | $ 4,017.0

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- Definition Pass Through Costs Included In Revenues + Details
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Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

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- Details
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Namespace Prefix: | us-gaap
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration