Income Taxes (Tax Effect of Temporary Differences and Carryforwards That Comprise Significant Portions of Deferred Tax Assets and Liabilities) (Details) - USD ($) $ in Millions	Sep. 27, 2015	Sep. 28, 2014
Income Tax Disclosure [Abstract]
Property, plant and equipment	$ 121.4	$ 78.5
Accrued occupancy costs	98.4	58.8
Accrued compensation and related costs	81.7	75.3
Other accrued liabilities	49.0	27.6
Asset retirement obligation asset	29.0	18.6
Stored value card liability	99.1	63.4
Asset impairments	26.2	49.5
Tax credits	20.8	20.3
Stock-based compensation	135.5	131.5
Net operating losses	93.4	104.4
Litigation charge	931.0	1,002.0
Other	104.5	77.0
Total	1,790.0	1,706.9
Valuation allowance	(143.7)	(166.8)
Total deferred tax asset, net of valuation allowance	1,646.3	1,540.1
Property, plant and equipment	(217.5)	(148.2)
Intangible assets and goodwill	(177.3)	(92.9)
Other	(114.1)	(89.4)
Total	(508.9)	(330.5)
Net deferred tax asset	1,137.4	1,209.6
Current deferred income tax assets	381.7	317.4
Long-term deferred income tax assets	828.9	903.3
Current deferred income tax liabilities	(5.4)	(4.2)
Long-term deferred income tax liabilities	$ (67.8)	$ (6.9)