Acquisitions Changes in Carry Amount of Goodwill (Details) $ in Millions	9 Months Ended
	Jun. 29, 2019 USD ($)
Goodwill [Line Items]
Beginning balance	$ 31,269
Segment Recast	0	[1]
Acquisitions	46,521	[2]
Other, net	11
Ending balance	77,801
Media Networks
Goodwill [Line Items]
Beginning balance	19,388
Segment Recast	(3,399)	[1]
Acquisitions	0	[2]
Other, net	0
Ending balance	15,989
Parks And Resorts
Goodwill [Line Items]
Beginning balance	291
Segment Recast	(291)	[1]
Acquisitions	0	[2]
Other, net	0
Ending balance	0
Studio Entertainment
Goodwill [Line Items]
Beginning balance	7,164
Segment Recast	(70)	[1]
Acquisitions	0	[2]
Other, net	4
Ending balance	7,098
Consumer Products and Interactive
Goodwill [Line Items]
Beginning balance	4,426
Segment Recast	(4,426)	[1]
Acquisitions	0	[2]
Other, net	0
Ending balance	0
Parks, Experiences and Products
Goodwill [Line Items]
Beginning balance	0
Segment Recast	4,487	[1]
Acquisitions	0	[2]
Other, net	0
Ending balance	4,487
Direct-to-Consumer & International
Goodwill [Line Items]
Beginning balance	0
Segment Recast	3,699	[1]
Acquisitions	0	[2]
Other, net	7
Ending balance	3,706
Unallocated
Goodwill [Line Items]
Beginning balance	0
Segment Recast	0
Acquisitions	46,521
Other, net	0
Ending balance	$ 46,521

[1] Represents the reallocation of goodwill as a result of the Company recasting its segments (see Note 2).

[2] Represents the acquisition of 21CF and consolidation of Hulu.