Acquisitions Changes in Carrying Amount of Goodwill (Detail) - USD ($) $ in Millions		12 Months Ended
		Oct. 02, 2021	Oct. 03, 2020
Goodwill [Roll Forward]
Beginning balance		$ 77,689	$ 80,293
Acquisitions	[1]		732
Goodwill, Impairment Loss			(3,074)
Other, net		382	(262)
Segment Recast		0
Ending balance		78,071	77,689
Media Networks
Goodwill [Roll Forward]
Beginning balance		33,991	33,423
Acquisitions	[1]		568
Goodwill, Impairment Loss			0
Other, net		0	0
Segment Recast	[2]	(33,991)
Ending balance		0	33,991
Disney Parks, Experiences and Products
Goodwill [Roll Forward]
Beginning balance		5,550	5,535
Acquisitions	[1]		15
Goodwill, Impairment Loss			0
Other, net		0	0
Segment Recast		0
Ending balance		5,550	5,550
Studio Entertainment
Goodwill [Roll Forward]
Beginning balance		17,795	17,797
Acquisitions	[1]		98
Goodwill, Impairment Loss			0
Other, net		0	(100)
Segment Recast	[2]	(17,795)
Ending balance		0	17,795
Direct-to-Consumer & International
Goodwill [Roll Forward]
Beginning balance		20,353	23,538
Acquisitions	[1]		51
Goodwill, Impairment Loss			(3,074)
Other, net		0	(162)
Segment Recast	[2]	(20,353)
Ending balance		0	20,353
Disney Media and Entertainment Distribution
Goodwill [Roll Forward]
Beginning balance		0	0
Acquisitions			0
Goodwill, Impairment Loss			0
Other, net		382	0
Segment Recast	[2]	72,139
Ending balance		$ 72,521	$ 0

[1] Reflects updates to allocation of purchase price for the acquisition of TFCF.

[2] Reflects the reallocation of goodwill as a result of the Company recasting its segments.