International Theme Park Investments - Impact of Consolidating Cash Flow Statements of International Theme Parks (Detail) - USD ($) $ in Millions	12 Months Ended
	Oct. 03, 2015	Sep. 27, 2014	Sep. 28, 2013
Schedule of Condensed Consolidating Statement of Cash Flows [Line Items]
Cash provided by operations	$ 10,909	$ 9,780	$ 9,452
Investments in parks, resorts and other property	(4,265)	(3,311)	(2,796)
Cash (used in)/provided by other investing activities	20
Cash (used in)/provided by financing activities	(5,514)	(6,710)	(4,214)
Impact of exchange rates on cash and cash equivalents	(302)	(235)	(18)
Change in cash and cash equivalents	848	(510)	544
Cash and cash equivalents, beginning of year	3,421	3,931	3,387
Cash and cash equivalents, end of year	4,269	3,421	$ 3,931
Before International Theme Parks Consolidation
Schedule of Condensed Consolidating Statement of Cash Flows [Line Items]
Cash provided by operations	10,742
Investments in parks, resorts and other property	(2,118)
Cash (used in)/provided by other investing activities	(855)
Cash (used in)/provided by financing activities	(6,642)
Impact of exchange rates on cash and cash equivalents	(284)
Change in cash and cash equivalents	843
Cash and cash equivalents, beginning of year	2,645
Cash and cash equivalents, end of year	3,488	2,645
International Theme Parks and Adjustments
Schedule of Condensed Consolidating Statement of Cash Flows [Line Items]
Cash provided by operations	167
Investments in parks, resorts and other property	(2,147)
Cash (used in)/provided by other investing activities	875
Cash (used in)/provided by financing activities	1,128
Impact of exchange rates on cash and cash equivalents	(18)
Change in cash and cash equivalents	5
Cash and cash equivalents, beginning of year	776
Cash and cash equivalents, end of year	$ 781	$ 776