Income Taxes (Tax Effect Of Temporary Differences And Carryforwards That Comprise Significant Portions Of Deferred Tax Assets And Liabilities) (Details) (USD $) In Millions	Oct. 02, 2011	Oct. 03, 2010
Income Taxes
Property, plant and equipment	$ 46.4	$ 32.6
Accrued occupancy costs	55.9	55.2
Accrued compensation and related costs	69.6	100.8
Other accrued liabilities	27.8	25.0
Asset retirement obligation asset	19.0	14.9
Deferred revenue	47.8	58.4
Asset impairments	60.0	94.8
Tax credits	23.0	41.0
Stock based compensation	128.8	115.9
Net operating losses	85.5	43.7
Other	58.6	50.6
Total	622.4	632.9
Valuation allowance	(137.4)	(88.1)
Total deferred tax asset, net of valuation allowance	485.0	544.8
Property, plant and equipment	(66.4)	(26.2)
Other	(43.3)	(19.1)
Total	(109.7)	(45.3)
Net deferred tax asset	375.3	499.5
Current deferred income tax assets	230.4	304.2
Long-term deferred income tax assets (included in Other assets)	156.3	195.3
Current deferred income tax liabilities	(4.9)	0
Long-term deferred income tax liabilities	$ (6.5)	$ 0