Description of the Business and Segment Information - Equity in Income of Investees by Segment (Detail) - USD ($) $ in Millions	12 Months Ended
	Sep. 30, 2017	Oct. 01, 2016	Oct. 03, 2015
Schedule of Equity Method Investments [Line Items]
Equity in the income of investees	$ 320	$ 926	$ 814
Vice Media
Schedule of Equity Method Investments [Line Items]
Equity in the income of investees	0	332	0
Media Networks
Schedule of Equity Method Investments [Line Items]
Equity in the income of investees	344	597	814
Parks and Resorts
Schedule of Equity Method Investments [Line Items]
Equity in the income of investees	(25)	(3)	0
Consumer Products and Interactive
Schedule of Equity Method Investments [Line Items]
Equity in the income of investees	1	0	0
Total Segments
Schedule of Equity Method Investments [Line Items]
Equity in the income of investees	$ 320	$ 594	$ 814