Income Taxes (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended		6 Months Ended
	Mar. 28, 2014	Mar. 29, 2013	Mar. 28, 2014	Mar. 29, 2013	Sep. 27, 2013
2012 Tax Sharing Agreement
Tax Sharing Agreement [Line Items]
Prepaid expenses and other current assets	$ 0		$ 0		$ 0
Other assets	0		0		0
Net receivable	0		0		0
Accrued and other current liabilities	(33)		(33)		(33)
Other liabilities	(37)		(37)		(36)
Tax sharing agreement related liabilities	(70)		(70)		(69)
Net liability	(70)		(70)		(69)
(Expense)	(3)	(20)	(5)	(30)
2007 Tax Sharing Agreement
Tax Sharing Agreement [Line Items]
Prepaid expenses and other current assets	32		32		0
Other assets	35		35		67
Net receivable	67		67		67
Accrued and other current liabilities	(191)		(191)		(130)
Other liabilities	(190)		(190)		(254)
Tax sharing agreement related liabilities	(381)		(381)		(384)
Net liability	(314)		(314)		(317)
(Expense)	$ 1	$ 0	$ 1	$ 0