Income Taxes (Summary of Activity Related to Unrecognized Tax Benefits) (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended
Sep. 28, 2014	Sep. 29, 2013	Sep. 30, 2012
Income Tax Disclosure [Abstract]
Beginning balance	$ 88.8	$ 75.3	$ 52.9
Increase related to prior year tax positions	1.4	8.9	8.8
Decrease related to prior year tax positions	(2.2)	(9.3)	0
Increase related to current year tax positions	26.7	19.3	20.0
Decrease related to current year tax positions	(1.9)	(0.4)	(1.1)
Decreases related to settlements with taxing authorities	(0.1)	0	(0.5)
Decreases related to lapsing of statute of limitations	0	(5.0)	(4.8)
Ending balance	$ 112.7	$ 88.8	$ 75.3

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Amount of unrecognized tax benefits pertaining to uncertain tax positions taken in tax returns.

+ References

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-Publisher FASB

-Name Accounting Standards Codification

-Glossary Unrecognized Tax Benefit

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Amount of decrease 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 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 increase 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 lapses of applicable statutes of limitations.

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