Details about AOCI Components Reclassified to Net Income (Details) - USD ($) $ in Millions	3 Months Ended	6 Months Ended
Mar. 31, 2018	Apr. 01, 2017	Mar. 31, 2018	Apr. 01, 2017
Details about AOCI Components Reclassified to Net Income
Interest expense, net	$ (143)	$ (84)	$ (272)	$ (183)
Primarily revenue	14,548	13,336	29,899	28,120
Income taxes	(813)	(1,212)	(85)	(2,449)
Net income attributable to The Walt Disney Company (Disney)	2,937	2,388	7,360	4,867
Reclassification out of Accumulated Other Comprehensive Income
Details about AOCI Components Reclassified to Net Income
Net income attributable to The Walt Disney Company (Disney)	(101)	(32)	(174)	(56)
Gain/(loss) in net income from Investments, net \| Reclassification out of Accumulated Other Comprehensive Income
Details about AOCI Components Reclassified to Net Income
Interest expense, net	0	6	0	6
Income taxes	0	(2)	0	(2)
Net income attributable to The Walt Disney Company (Disney)	0	4	0	4
Gain/(loss) in net income from Cash flow hedges \| Reclassification out of Accumulated Other Comprehensive Income
Details about AOCI Components Reclassified to Net Income
Primarily revenue	(37)	51	(57)	121
Income taxes	9	(19)	17	(45)
Net income attributable to The Walt Disney Company (Disney)	(28)	32	(40)	76
Gain/(loss) in net income from Pension and postretirement medical expense \| Reclassification out of Accumulated Other Comprehensive Income
Details about AOCI Components Reclassified to Net Income
Primarily included in the computation of net periodic benefit cost	(96)	(108)	(192)	(216)
Income taxes	23	40	58	80
Net income attributable to The Walt Disney Company (Disney)	$ (73)	$ (68)	$ (134)	$ (136)

Amount of net periodic benefit cost (credit) for defined benefit plan.

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Amount of current income tax expense (benefit) and deferred income tax expense (benefit) pertaining to continuing operations.

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