Acquisitions Changes in Carrying Amount of Goodwill (Detail) - USD ($) $ in Millions	12 Months Ended
	Oct. 01, 2016	Oct. 03, 2015
Goodwill [Roll Forward]
Beginning balance	$ 27,826	$ 27,881
Acquisitions	2	5
Dispositions	0	(1)
Other, net	(18)	(59)
Ending balance	27,810	27,826
Media Networks
Goodwill [Roll Forward]
Beginning balance	16,354	16,378
Acquisitions	1	3
Dispositions	0	0
Other, net	(10)	(27)
Ending balance	16,345	16,354
Parks and Resorts
Goodwill [Roll Forward]
Beginning balance	291	291
Acquisitions	0	0
Dispositions	0	0
Other, net	0	0
Ending balance	291	291
Studio Entertainment
Goodwill [Roll Forward]
Beginning balance	6,836	6,856
Acquisitions	1	2
Dispositions	0	0
Other, net	(7)	(22)
Ending balance	6,830	6,836
Consumer Products and Interactive
Goodwill [Roll Forward]
Beginning balance	4,345	4,356
Acquisitions	0	0
Dispositions	0	(1)
Other, net	(1)	(10)
Ending balance	$ 4,344	$ 4,345