Description of Business and Segment Information Financial Information by Operating Segments (Parenthetical) (Details) - USD ($) $ in Millions	3 Months Ended			9 Months Ended
	Jun. 29, 2019	Jun. 30, 2018		Jun. 29, 2019	Jun. 30, 2018
Segment Reporting Information
Revenues	$ 20,245	$ 15,229	[1]	$ 50,470	$ 45,128	[2]
Segment operating income	3,961	4,189		11,432	12,412
Media Networks
Segment Reporting Information
Revenues	6,713	5,534	[1]	18,317	16,597	[2]
Segment operating income	2,136	1,995		5,696	5,496
Direct-to-Consumer & International
Segment Reporting Information
Revenues	3,858	827	[1]	5,921	2,589	[2]
Segment operating income	(553)	(168)		(1,074)	(398)
Studio Entertainment intersegment content transactions | Media Networks
Segment Reporting Information
Revenues	(41)	(25)		(75)	(120)
Segment operating income	(16)	7		(11)	(2)
Studio Entertainment intersegment content transactions | Direct-to-Consumer & International
Segment Reporting Information
Revenues	(82)	(8)		(182)	(24)
Segment operating income	(35)	0		(79)	0
Media Networks intersegment content transactions | Direct-to-Consumer & International
Segment Reporting Information
Revenues	(614)	(115)		(898)	(368)
Segment operating income	(82)	(1)		(84)	(2)
Intersegment transactions
Segment Reporting Information
Revenues	(737)	(148)		(1,155)	(512)
Segment operating income	$ (133)	$ 6		$ (174)	$ (4)

[1] Amounts reflect our historical accounting prior to the adoption of the new revenue guidance.

[2] Amounts reflect our historical accounting prior to the adoption of the new revenue guidance.