Acquisitions Changes in Carry Amount of Goodwill (Details) $ in Millions	3 Months Ended
	Dec. 29, 2018 USD ($)
Goodwill [Line Items]
Beginning balance	$ 31,269
Segment Recast	0	[1]
Other, net	20
Ending balance	31,289
Media Networks
Goodwill [Line Items]
Beginning balance	19,388
Segment Recast	(3,399)	[1]
Other, net	0
Ending balance	15,989
Parks And Resorts
Goodwill [Line Items]
Beginning balance	291
Segment Recast	(291)	[1]
Other, net	0
Ending balance	0
Studio Entertainment
Goodwill [Line Items]
Beginning balance	7,164
Segment Recast	(70)	[1]
Other, net	9
Ending balance	7,103
Consumer Products and Interactive
Goodwill [Line Items]
Beginning balance	4,426
Segment Recast	(4,426)	[1]
Other, net	0
Ending balance	0
Parks Experiences & Consumer Products
Goodwill [Line Items]
Beginning balance	0
Segment Recast	4,487	[1]
Other, net	0
Ending balance	4,487
Direct-to-Consumer & International
Goodwill [Line Items]
Beginning balance	0
Segment Recast	3,699	[1]
Other, net	11
Ending balance	$ 3,710

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