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. 28, 2014	Sep. 29, 2013
Income Tax Disclosure [Abstract]
Property, plant and equipment	$ 78.5	$ 64.9
Accrued occupancy costs	58.8	69.0
Accrued compensation and related costs	75.3	77.6
Other accrued liabilities	27.6	22.0
Asset retirement obligation asset	18.6	21.0
Deferred revenue	63.4	49.9
Asset impairments	49.5	33.3
Tax credits	20.3	19.1
Stock-based compensation	131.5	120.9
Net operating losses	104.4	99.0
Litigation charge	1,002.0	1,071.9
Other	77.0	62.7
Total	1,706.9	1,711.3
Valuation allowance	(166.8)	(160.5)
Total deferred tax asset, net of valuation allowance	1,540.1	1,550.8
Property, plant and equipment	(148.2)	(182.9)
Intangible assets and goodwill	(92.9)	(81.6)
Other	(89.4)	(53.1)
Total	(330.5)	(317.6)
Net deferred tax asset	1,209.6	1,233.2
Current deferred income tax assets	317.4	277.3
Long-term deferred income tax assets	903.3	967.0
Current deferred income tax liabilities	(4.2)	(1.0)
Long-term deferred income tax liabilities	$ (6.9)	$ (10.1)