Financial Information by Operating Segments- Intersegment Eliminations (Details) - USD ($) $ in Millions		3 Months Ended
		Dec. 29, 2018	Dec. 30, 2017
Segment Reporting Information
Revenues		$ 15,303	$ 15,351
Studio Entertainment
Segment Reporting Information
Revenues	[1]	1,824	2,509
Parks Experiences & Consumer Products
Segment Reporting Information
Revenues	[1]	6,824	6,527
Intersegment Eliminations | Studio Entertainment
Segment Reporting Information
Revenues		154	171
Intersegment Eliminations | Parks Experiences & Consumer Products
Segment Reporting Information
Revenues		$ (154)	$ (171)

[1] Studio Entertainment revenues and operating income include an allocation of Parks, Experiences & Consumer Products 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 Parks, Experiences & Consumer Products revenues and operating income was $154 million and $171 million for the quarters ended December 29, 2018 and December 30, 2017, respectively.