Description of the Business and Segment Information - Equity in Income of Investees by Segment (Detail) - USD ($) $ in Millions	12 Months Ended
	Oct. 03, 2015	Sep. 27, 2014	Sep. 28, 2013
Schedule of Equity Method Investments [Line Items]
Equity in the income of investees included in segment operating income	$ 814	$ 854	$ 688
Media Networks | Cable
Schedule of Equity Method Investments [Line Items]
Equity in the income of investees included in segment operating income	896	895	788
Media Networks | Broadcasting
Schedule of Equity Method Investments [Line Items]
Equity in the income of investees included in segment operating income	(82)	(39)	(46)
Parks and Resorts
Schedule of Equity Method Investments [Line Items]
Equity in the income of investees included in segment operating income	0	(2)	0
Total Segments
Schedule of Equity Method Investments [Line Items]
Equity in the income of investees included in segment operating income	$ 814	$ 854	$ 742