Quarterly Financial Summary (Detail) - USD ($) $ / shares in Units, $ in Millions	3 Months Ended																12 Months Ended
	Sep. 30, 2017		Jul. 01, 2017		Apr. 01, 2017		Dec. 31, 2016		Oct. 01, 2016		Jul. 02, 2016		Apr. 02, 2016		Jan. 02, 2016		Sep. 30, 2017	Oct. 01, 2016	Oct. 03, 2015
Quarterly Financial Information [Line Items]
Revenues	$ 12,779		$ 14,238		$ 13,336		$ 14,784		$ 13,142		$ 14,277		$ 12,969		$ 15,244		$ 55,137	$ 55,632	$ 52,465
Segment operating income	2,812	[1]	4,011	[1]	3,996	[1]	3,956	[1]	3,176	[1]	4,456	[1]	3,822	[1]	4,267	[1]	14,775	15,721	14,681
Net Income	1,865		2,474		2,539		2,488		1,892		2,712		2,276		2,910		9,366	9,790	8,852
Net income attributable to Disney	$ 1,747		$ 2,366		$ 2,388		$ 2,479		$ 1,771		$ 2,597		$ 2,143		$ 2,880		$ 8,980	$ 9,391	$ 8,382
Earnings Per Share, Diluted (usd per share)	$ 1.13	[2]	$ 1.51	[3]	$ 1.50		$ 1.55		$ 1.10	[2]	$ 1.59	[3]	$ 1.30	[4]	$ 1.73	[5]	$ 5.69	$ 5.73	$ 4.90
Earnings Per Share, Basic (usd per share)	$ 1.14		$ 1.51		$ 1.51		$ 1.56		$ 1.10		$ 1.60		$ 1.31		$ 1.74		$ 5.73	$ 5.76	$ 4.95

[1] Segment operating results reflect earnings before the Infinity Charge, corporate and unallocated shared expenses, restructuring and impairment charges, other expense, interest income/(expense), income taxes and noncontrolling interests. Segment operating income includes equity in the income of investees except for the Vice Gain.

[2] Results for the fourth quarter of fiscal 2017 included a non-cash net gain in connection with the acquisition of a controlling interest in BAMTech, which had a favorable impact of $0.10 per diluted earnings per share (see Note 3 to the Consolidated Financial Statements), partially offset by restructuring and impairment charges, which had an adverse impact of $0.04 per diluted earnings per share. Results for the fourth quarter of fiscal 2016 included an adjustment to the Infinity Charge taken in the second quarter, which had a favorable impact of $0.01 per diluted earnings per share, partially offset by restructuring and impairment charges, which had an adverse impact of $0.01 per diluted earnings per share.

[3] Results for the third quarter of fiscal 2017 included a charge, net of committed insurance recoveries, incurred in connection with the settlement of litigation, which had an adverse impact of $0.07 on diluted earnings per share. Results for the third quarter of fiscal 2016 included restructuring and impairment charges, which had an adverse impact of $0.03 on diluted earnings per share.

[4] Results for the second quarter of fiscal 2016 included the Infinity Charge, which had an adverse impact of $0.06 on diluted earnings per share (See Note 1 to the Consolidated Financial Statements).

[5] Results for the first quarter of fiscal 2016 included the Vice Gain, which had a favorable impact of $0.13 on earnings per diluted share (see Note 1 to the Consolidated Financial Statements), partially offset by restructuring and impairment charges, which had an adverse impact of $0.03 on diluted earnings per share.