Summary of Significant Accounting Policies (Narrative) (Details) $ / shares in Units, $ in Millions		12 Months Ended
	Apr. 09, 2015 USD ($) $ / shares	Sep. 27, 2015 USD ($) $ / shares	Sep. 28, 2014 USD ($) $ / shares	Sep. 29, 2013 USD ($)
Accounting Policies [Abstract]
Number of reportable operating segments		4
Receivables, net of Allowance for Doubtful Accounts
Allowance for doubtful accounts		$ 10.8	$ 6.7
Inventories
Inventory reserves		33.8	31.2
Property, Plant and Equipment [Line Items]
Net disposition charges on property, plant and equipment		(12.5)	(14.7)	$ (17.4)
Net impairment charges on property, plant and equipment		25.8	19.0	12.7
Other Intangible Assets
Other intangible asset impairment charges		0.0	0.0	0.0
Revenue Recognition
Breakage income		39.3	38.3	33.0
Marketing & Advertising
Marketing expenses		351.5	315.5	306.8
Advertising expenses		227.9	198.9	$ 205.8
Asset Retirement Obligations
Net ARO assets included in property, plant and equipment		5.8	4.1
Net ARO liabilities included in other long-term liabilities		$ 60.1	$ 28.4
Class of Stock [Line Items]
Stock split conversion ratio	2
Common stock, par value | $ / shares		$ 0.001	$ 0.001
Equipment [Member] | Maximum [Member]
Property, Plant and Equipment [Line Items]
Estimated useful life of property, plant and equipment, in years		15 years
Equipment [Member] | Minimum [Member]
Property, Plant and Equipment [Line Items]
Estimated useful life of property, plant and equipment, in years		2 years
Buildings [Member] | Maximum [Member]
Property, Plant and Equipment [Line Items]
Estimated useful life of property, plant and equipment, in years		40 years
Buildings [Member] | Minimum [Member]
Property, Plant and Equipment [Line Items]
Estimated useful life of property, plant and equipment, in years		30 years
Leasehold improvements [Member]
Property, Plant and Equipment [Line Items]
Estimated useful life of property, plant and equipment, in years		10 years
Commodity Contract [Member] | Maximum [Member]
Derivative [Line Items]
Derivative instruments maturity, in years		3 years
Common Stock [Member]
Class of Stock [Line Items]
Stock split conversion ratio	2
Common stock, par value | $ / shares	$ 0.001
Impact to shareholders' equity from stock split	$ 0.0