Equity Details about AOCI Components Reclassified to Net Income (Details) - USD ($) $ in Millions	12 Months Ended
	Oct. 02, 2021	Oct. 03, 2020	Sep. 28, 2019
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Revenues	$ 67,418	$ 65,388	$ 69,607
Income Tax Expense (Benefit)	(25)	(699)	(3,026)
Net income attributable to The Walt Disney Company (Disney)	1,995	(2,864)	11,054
Reclassification out of Accumulated Other Comprehensive Income
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Net income attributable to The Walt Disney Company (Disney)	(605)	(218)	(72)
Reclassification out of Accumulated Other Comprehensive Income | Gain/(loss) in net income from Cash flow hedges
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Revenues	31	263	185
Income Tax Expense (Benefit)	(10)	(61)	(43)
Net income attributable to The Walt Disney Company (Disney)	21	202	142
Reclassification out of Accumulated Other Comprehensive Income | Gain/(loss) in net income from Pension and postretirement medical expense
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Net periodic benefit cost other than service cost included in interest expense, net	(816)	(547)	(278)
Income Tax Expense (Benefit)	190	127	64
Net income attributable to The Walt Disney Company (Disney)	$ (626)	$ (420)	$ (214)