Income Taxes (Changes in Unrecognized Tax Benefit) (Details) $ in Millions	12 Months Ended
Sep. 29, 2017 USD ($)
Income Tax Disclosure [Abstract]
Balance at September 30, 2016	$ 79.7
Decreases based on positions related to prior years	(0.9)
Increases based on positions related to current year	14.5
Decreases relating to settlements with taxing authorities	(2.6)
Decreases relating to lapses of applicable statues of limitations	(0.3)
Balance at September 29, 2017	$ 90.4

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- Definition

Amount of unrecognized tax benefits.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 740
-SubTopic 10
-Section 50
-Paragraph 15A
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=65882285&loc=SL6600010-109319

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Glossary Unrecognized Tax Benefit
-URI http://asc.fasb.org/extlink&oid=6527854

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Amount of decrease in unrecognized tax benefits resulting from tax positions taken in prior period tax returns.

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Amount of decrease in unrecognized tax benefits resulting from settlements with taxing authorities.

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Amount of increase in unrecognized tax benefits resulting from tax positions that have been or will be taken in current period tax return.

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Amount of decrease in unrecognized tax benefits resulting from lapses of applicable statutes of limitations.

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