Description of the Business and Segment Information - Equity in Income of Investees by Segment (Detail) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Sep. 28, 2013	Sep. 29, 2012	Oct. 01, 2011
Schedule of Equity Method Investments [Line Items]
Equity in income of investees	$ 688	$ 627	$ 585
Media Networks
Schedule of Equity Method Investments [Line Items]
Equity in income of investees	742	627	584
Media Networks | Cable
Schedule of Equity Method Investments [Line Items]
Equity in income of investees	788	664	578
Media Networks | Broadcasting
Schedule of Equity Method Investments [Line Items]
Equity in income of investees	$ (46)	$ (37)	$ 6