Debt (Narrative) (Details) (USD $)	12 Months Ended								3 Months Ended			12 Months Ended				1 Months Ended			1 Months Ended			1 Months Ended			1 Months Ended
	Sep. 28, 2014	Sep. 29, 2013	Sep. 30, 2012	Sep. 28, 2014 Revolving Credit Facility [Member]	Sep. 29, 2013 Revolving Credit Facility [Member]	Sep. 28, 2014 Revolving Credit Facility [Member] Eurocurrency Rate [Member]	Sep. 28, 2014 Revolving Credit Facility [Member] Base Rate [Member]	Sep. 28, 2014 Senior Notes [Member]	Sep. 28, 2014 Commercial Paper [Member]	Dec. 29, 2013 Commercial Paper [Member]	Sep. 29, 2013 Commercial Paper [Member]	Sep. 28, 2014 Commercial Paper [Member] Maximum [Member]	Sep. 28, 2014 Letter of Credit [Member]	Sep. 28, 2014 0.875% Senior Notes [Member]	Sep. 29, 2013 0.875% Senior Notes [Member]	Dec. 29, 2013 0.875% Senior Notes [Member] Senior Notes [Member]	Sep. 28, 2014 2.000% Senior Notes [Member]	Sep. 29, 2013 2.000% Senior Notes [Member]	Dec. 29, 2013 2.000% Senior Notes [Member] Senior Notes [Member]	Sep. 28, 2014 3.850% Senior Notes [Member]	Sep. 29, 2013 3.850% Senior Notes [Member]	Sep. 29, 2013 3.850% Senior Notes [Member] Senior Notes [Member]	Sep. 28, 2014 6.250% Senior Notes [Member]	Sep. 29, 2013 6.250% Senior Notes [Member]	Aug. 31, 2007 6.250% Senior Notes [Member] Senior Notes [Member]
Unsecured revolving credit facility				$ 750,000,000
Amount of credit facility available for issuances of letters of credit				150,000,000
Maturity date of credit facility				Feb. 05, 2018
Maximum increase in commitment amount allowable under the credit facility				750,000,000
Incremental interest rate over variable rate loans						0.795%	0.00%
Line of credit covenant compliance				The credit facility contains provisions requiring us to maintain compliance with certain covenants, including a minimum fixed charge coverage ratio, which measures our ability to cover financing expenses. As a result of the arbitrator’s ruling on the Kraft litigation, the credit facility was amended on November 15, 2013 to exclude the impact of the litigation charge, including the impact on our fixed charge coverage ratio. As of September 28, 2014, we were in compliance with all applicable covenants.
Amount outstanding under credit facility				0	0
Maximum allowable aggregate amount outstanding under Commercial Paper Program									1,000,000,000
Maximum allowable maturity period of credit under Commercial Paper Program												397 days
Combined borrowing limit of Commercial Paper Program and Credit Facility									727,000,000
Letters of credit outstanding													23,000,000
Commercial paper borrowings									25,000,000	225,000,000
Litigation payment	2,763,900,000	0	0
Borrowings outstanding under commercial paper program									0		0
Issuance date of Senior Notes																Dec. 02, 2013			Dec. 02, 2013			Sep. 06, 2013			Aug. 15, 2007
Maturity date of Senior Notes																Dec. 05, 2016			Dec. 05, 2018			Oct. 01, 2023			Aug. 31, 2017
Face amount of Senior Notes														400,000,000	0	400,000,000	350,000,000	0	350,000,000	750,000,000	750,000,000	750,000,000	550,000,000	550,000,000	550,000,000
Stated interest rate of Senior Notes														0.875%		0.875%	2.00%		2.00%	3.85%		3.85%	6.25%		6.25%
Long-term debt, covenant compliance								The indentures under which the above notes were issued also require us to maintain compliance with certain covenants, including limits on future liens and sale and leaseback transactions on certain material properties. As of September 28, 2014, we were in compliance with each of these covenants.
Interest expense, net of interest capitalized	64,100,000	28,100,000	32,700,000
Interest capitalized	$ 6,200,000	$ 10,400,000	$ 3,200,000