Financial Information by Operating Segments- Intersegment Eliminations (Details) - USD ($) $ in Millions		3 Months Ended
		Dec. 30, 2017	Dec. 31, 2016
Segment Reporting Information
Revenues:		$ 15,351	$ 14,784
Studio Entertainment
Segment Reporting Information
Revenues:	[1]	2,504	2,520
Consumer Products and Interactive
Segment Reporting Information
Revenues:	[1]	1,450	1,476
Intersegment Eliminations | Studio Entertainment
Segment Reporting Information
Revenues:		171	181
Intersegment Eliminations | Consumer Products and Interactive
Segment Reporting Information
Revenues:		$ (171)	$ (181)

[1] Studio Entertainment revenues and operating income include an allocation of Consumer Products & Interactive Media revenues, which is meant to reflect royalties on sales of merchandise based on film properties. The increase to Studio Entertainment revenues and operating income and corresponding decrease to Consumer Products & Interactive Media revenues and operating income was $171 million and $181 million for the quarters ended December 30, 2017 and December 31, 2016, respectively