Quarterly Financial Summary (Detail) - USD ($) $ / shares in Units, $ in Millions	3 Months Ended																12 Months Ended
	Sep. 28, 2019		Jun. 29, 2019		Mar. 30, 2019		Dec. 29, 2018		Sep. 29, 2018		Jun. 30, 2018		Mar. 31, 2018		Dec. 30, 2017		Sep. 28, 2019		Sep. 29, 2018		Sep. 30, 2017
Quarterly Financial Information [Line Items]
Revenues	$ 19,100	[1]	$ 20,245	[1]	$ 14,922		$ 15,303		$ 14,306		$ 15,229		$ 14,548		$ 15,351		$ 69,570		$ 59,434		$ 55,137
Income from continuing operations before income taxes	1,258		2,018		7,237		3,431										13,944		14,729		13,788
Segment operating income	3,436	[2]	3,961	[2]	3,816	[2]	3,655	[2]	3,277	[2]	4,189	[2]	4,237	[2]	3,986	[2]	14,868	[3]	15,689	[3]	14,775	[3]
Net income from continuing operations	914		1,623		5,590		2,786		2,419		3,059		3,115		4,473		10,913		13,066		9,366
Net income attributable to Disney	1,054		1,760		5,452		2,788		$ 2,322		$ 2,916		$ 2,937		$ 4,423		11,054		12,598		8,980
Income (loss) from discontinued operations	$ 291		$ 359		$ 21		$ 0										$ 671		$ 0		$ 0
Earnings Per Share from Continuing Operations, Diluted (usd per share)	$ 0.43	[4]	$ 0.79	[5]	$ 3.53	[6]	$ 1.86										$ 6.27		$ 8.36		$ 5.69
Earnings Per Share, Diluted (usd per share)	0.58		0.97		3.55		1.86		$ 1.55	[7]	$ 1.95	[8]	$ 1.95	[9]	$ 2.91	[10]	6.64	[11]	8.36	[11]	5.69	[11]
Earnings Per Share from Continuing Operations, Basic (usd per share)	0.44		0.80		3.55		1.87										6.30		8.40		5.73
Earnings Per Share, Basic (usd per share)	$ 0.58		$ 0.98		$ 3.56		$ 1.87		$ 1.56		$ 1.96		$ 1.95		$ 2.93		$ 6.68	[11]	$ 8.40	[11]	$ 5.73	[11]

[1] On March 20, 2019, the Company began consolidating the results of TFCF and Hulu (see Note 4 to the Consolidated Financial Statements). As a result, revenues and operating results in the third and fourth quarter of fiscal 2019 reflected the impact of this transaction.

[2] Segment operating results reflect earnings before the corporate and unallocated shared expenses, restructuring and impairment charges, other income, net, interest expense, net, income taxes and noncontrolling interests.

[3] Equity in the income/(loss) of investees included in segment operating income is as follows:   2019   2018   2017 Media Networks $ 703
  $ 711
  $ 766
Parks, Experiences and Products (13 )   (23 )   (25 ) Direct-to-Consumer & International (240 )   (580 )   (421 ) Equity in the income of investees included in segment operating income 450
  108
  320
Impairment of equity investments (538 )   (210 )   —
Amortization of TFCF intangible assets related to equity investees (15 )   —
  —
Equity in the income (loss) of investees, net $ (103 )   $ (102 )   $ 320

[4] Results for the fourth quarter of fiscal 2019 included amortization related to TFCF and Hulu intangible assets and fair value step-up on film and television costs, which had an adverse impact of $0.30 on diluted earnings per share, a charge for the settlement of a portion of the debt originally assumed in the TFCF acquisition, which had an adverse impact of $0.22 on diluted earnings per share, and restructuring and impairment charges, which had an adverse impact of $0.13 on diluted earnings per share.

[5] Results for the third quarter of fiscal 2019 included amortization related to TFCF and Hulu intangible assets and fair value step-up on film and television costs, which had an adverse impact of $0.34 on diluted earnings per share, restructuring and impairment charges, which had a net adverse impact of $0.09 on diluted earnings per share, equity investment impairments, which had an adverse impact of $0.08 on diluted earnings per share, and an adjustment to the Hulu Gain, which had an adverse impact of $0.05 on diluted earnings per share.

[6] Results for the second quarter of fiscal 2019 included a non-cash gain in connection with the acquisition of Hulu (Hulu Gain), which had a favorable impact of $2.46 on diluted earnings per share. This favorable impact was partially offset by restructuring and impairment charges, which had an adverse impact of $0.33 on diluted earnings per share, an impairment in our investment in Vice, which had an adverse impact of $0.18 on diluted earnings per share, and amortization related to TFCF and Hulu intangible assets and fair value step-up on film and television costs, which had an adverse impact of $0.05 on diluted earnings per share.

[7] Results for the fourth quarter of fiscal 2018 included a gain in connection with the sale of real estate, which had a favorable impact of $0.25 on diluted earnings per share, partially offset by equity investment impairments, which had an adverse impact of $0.11 on diluted earnings per share, and the impact of updating the Tax Act Estimate, which had an adverse impact of $0.06 on diluted earnings per share.

[8] Results for the third quarter of fiscal 2018 included a net benefit from updating the Tax Act Estimate, which had a favorable impact of $0.07 on diluted earnings per share.

[9] Results for the second quarter of fiscal 2018 included a net benefit from updating the Tax Act Estimate, which had a favorable impact of $0.09 on diluted earnings per share.

[10] Results for the first quarter of fiscal 2018 included an estimated net benefit from the Deferred Remeasurement, partially offset by the Deemed Repatriation Tax as a result of the Tax Act (Tax Act Estimate), which had a favorable impact of $1.00 on diluted earnings per share, and a gain from the sale of property rights, which had a favorable impact of $0.03 on diluted earnings per share.

[11] Total may not equal the sum of the column due to rounding.