Equity in the Income of Investees included in Segment Operating Results (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Mar. 31, 2018	Apr. 01, 2017	Mar. 31, 2018	Apr. 01, 2017
Schedule of Equity Method Investments
Equity in the income of investees	$ 6	$ 85	$ 49	$ 203
Media Networks
Schedule of Equity Method Investments
Equity in the income of investees	13	88	63	207
Parks and Resorts
Schedule of Equity Method Investments
Equity in the income of investees	(7)	(3)	(14)	(5)
Consumer Products and Interactive
Schedule of Equity Method Investments
Equity in the income of investees	0	0	0	1
Total Segments
Schedule of Equity Method Investments
Equity in the income of investees	$ 6	$ 85	$ 49	$ 203