Valuation and Qualifying Accounts (Details) (USD $) In Millions	12 Months Ended
	Sep. 25, 2011	Sep. 26, 2010	Sep. 27, 2009
Changes in Valuation Allowances [Roll Forward]
Balance at beginning of period	$ (54)	$ (87)	$ (190)
(Charged) Credited to costs and expenses	(36)	33	(219)
Deductions	4	3	44
Other	(17)	(3)	278
Balance at end of period	(103)	(54)	(87)
Valuation and Qualifying Accounts [Abstract]
Adjustment to allowances and reserves from an acquisition	12
Adjustment charged to other comprehensive income (loss)	5
Allowances - Trade Receivables [Member]
Changes in Valuation Allowances [Roll Forward]
Balance at beginning of period	(3)	(4)	(38)
(Charged) Credited to costs and expenses	0	(1)	(4)
Deductions	1	2	38
Other	0	0	0
Balance at end of period	(2)	(3)	(4)
Allowances - Notes Receivable [Member]
Changes in Valuation Allowances [Roll Forward]
Balance at beginning of period	(3)	(1)	(3)
(Charged) Credited to costs and expenses	0	(2)	(4)
Deductions	0	0	6
Other	0	0	0
Balance at end of period	(3)	(3)	(1)
Allowances - Investment Receivables [Member]
Changes in Valuation Allowances [Roll Forward]
Balance at beginning of period	(9)	(10)	0
(Charged) Credited to costs and expenses	6	0	(10)
Deductions	3	1	0
Other	0	0	0
Balance at end of period	0	(9)	(10)
Valuation Allowance on Deferred Tax Assets [Member]
Changes in Valuation Allowances [Roll Forward]
Balance at beginning of period	(39)	(72)	(149)
(Charged) Credited to costs and expenses	(42)	36	(201)
Deductions	0	0	0
Other	(17)	(3)	278
Balance at end of period	$ (98)	$ (39)	$ (72)