Income Taxes (Tax Effect of Temporary Differences and Carryforwards That Comprise Significant Portions of Deferred Tax Assets and Liabilities) (Details) (USD $) In Millions, unless otherwise specified	Sep. 29, 2013	Sep. 30, 2012
Income Tax Disclosure [Abstract]
Property, plant and equipment	$ 64.9	$ 62.7
Accrued occupancy costs	69.0	72.0
Accrued compensation and related costs	77.6	66.9
Other accrued liabilities	22.0	15.7
Asset retirement obligation asset	21.0	20.1
Deferred revenue	49.9	43.7
Asset impairments	33.3	38.5
Tax credits	19.1	14.6
Stock based compensation	120.9	131.8
Net operating losses	99.0	99.2
Litigation charge	1,071.9	0
Other	62.7	80.9
Total	1,711.3	646.1
Valuation allowance	(160.5)	(154.2)
Total deferred tax asset, net of valuation allowance	1,550.8	491.9
Property, plant and equipment	(182.9)	(89.0)
Intangible assets and goodwill	(81.6)	(34.0)
Other	(53.1)	(44.8)
Total	(317.6)	(167.8)
Net deferred tax asset	1,233.2	324.1
Current deferred income tax assets	277.3	238.7
Long-term deferred income tax assets (included in Other assets)	967.0	97.3
Current deferred income tax liabilities	(1.0)	(1.3)
Long-term deferred income tax liabilities	$ (10.1)	$ (10.6)