Details about AOCI Components Reclassified to Net Income (Details) - USD ($) $ in Millions	3 Months Ended	9 Months Ended
Jun. 30, 2018	Jul. 01, 2017	Jun. 30, 2018	Jul. 01, 2017
Details about AOCI Components Reclassified to Net Income
Interest expense, net	$ (143)	$ (117)	$ (415)	$ (300)
Primarily revenue	15,228	14,238	45,127	42,358
Income taxes	(795)	(1,144)	(880)	(3,593)
Net income attributable to The Walt Disney Company (Disney)	2,916	2,366	10,276	7,233
Reclassification out of Accumulated Other Comprehensive Income
Details about AOCI Components Reclassified to Net Income
Net income attributable to The Walt Disney Company (Disney)	(92)	(42)	(266)	(98)
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	0	0	6
Income taxes	0	0	0	(2)
Net income attributable to The Walt Disney Company (Disney)	0	0	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	(26)	41	(83)	162
Income taxes	6	(15)	23	(60)
Net income attributable to The Walt Disney Company (Disney)	(20)	26	(60)	102
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)	(288)	(324)
Income taxes	24	40	82	120
Net income attributable to The Walt Disney Company (Disney)	$ (72)	$ (68)	$ (206)	$ (204)

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

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