Disaggregation of Revenue by Major Source (Details) - USD ($) $ in Millions		3 Months Ended		6 Months Ended
		Mar. 30, 2019	Mar. 31, 2018	Mar. 30, 2019	Mar. 31, 2018
Disaggregation of Revenue [Line Items]
Revenues		$ 14,922	$ 14,548	$ 30,225	$ 29,899
Affiliate fees
Disaggregation of Revenue [Line Items]
Revenues		3,634	3,397	7,032	6,602
Advertising
Disaggregation of Revenue [Line Items]
Revenues		2,072	1,946	4,514	4,322
Theme park admissions
Disaggregation of Revenue [Line Items]
Revenues		1,768	1,690	3,701	3,522
Resort and vacations
Disaggregation of Revenue [Line Items]
Revenues		1,502	1,461	3,033	2,924
Retail and wholesale sales of merchandise, food and beverage
Disaggregation of Revenue [Line Items]
Revenues		1,768	1,707	3,890	3,766
TV/SVOD distribution licensing
Disaggregation of Revenue [Line Items]
Revenues		1,280	1,215	2,457	2,212
Theatrical distribution licensing
Disaggregation of Revenue [Line Items]
Revenues		752	956	1,125	2,125
Merchandise licensing
Disaggregation of Revenue [Line Items]
Revenues		773	783	1,683	1,748
Home entertainment
Disaggregation of Revenue [Line Items]
Revenues		294	495	747	886
Other
Disaggregation of Revenue [Line Items]
Revenues		1,079	898	2,043	1,792
Media Networks
Disaggregation of Revenue [Line Items]
Revenues		5,525	5,508	11,446	11,063
Media Networks | Affiliate fees
Disaggregation of Revenue [Line Items]
Revenues		3,177	3,043	6,252	5,910
Media Networks | Advertising
Disaggregation of Revenue [Line Items]
Revenues		1,596	1,643	3,619	3,606
Media Networks | Theme park admissions
Disaggregation of Revenue [Line Items]
Revenues		0	0	0	0
Media Networks | Resort and vacations
Disaggregation of Revenue [Line Items]
Revenues		0	0	0	0
Media Networks | TV/SVOD distribution licensing
Disaggregation of Revenue [Line Items]
Revenues		678	761	1,400	1,385
Media Networks | Theatrical distribution licensing
Disaggregation of Revenue [Line Items]
Revenues		0	0	0	0
Media Networks | Merchandise licensing
Disaggregation of Revenue [Line Items]
Revenues		0	0	0	0
Media Networks | Home entertainment
Disaggregation of Revenue [Line Items]
Revenues		0	0	0	0
Media Networks | Other
Disaggregation of Revenue [Line Items]
Revenues		74	61	175	162
Parks, Experiences and Products
Disaggregation of Revenue [Line Items]
Revenues	[1]	6,169	5,903	12,993	12,430
Parks, Experiences and Products | Affiliate fees
Disaggregation of Revenue [Line Items]
Revenues		0	0	0	0
Parks, Experiences and Products | Advertising
Disaggregation of Revenue [Line Items]
Revenues		1	2	3	4
Parks, Experiences and Products | Theme park admissions
Disaggregation of Revenue [Line Items]
Revenues		1,768	1,690	3,701	3,522
Parks, Experiences and Products | Resort and vacations
Disaggregation of Revenue [Line Items]
Revenues		1,502	1,461	3,033	2,924
Parks, Experiences and Products | Retail and wholesale sales of merchandise, food and beverage
Disaggregation of Revenue [Line Items]
Revenues		1,768	1,707	3,890	3,766
Parks, Experiences and Products | TV/SVOD distribution licensing
Disaggregation of Revenue [Line Items]
Revenues		0	0	0	0
Parks, Experiences and Products | Theatrical distribution licensing
Disaggregation of Revenue [Line Items]
Revenues		0	0	0	0
Parks, Experiences and Products | Merchandise licensing
Disaggregation of Revenue [Line Items]
Revenues		635	625	1,376	1,401
Parks, Experiences and Products | Home entertainment
Disaggregation of Revenue [Line Items]
Revenues		0	0	0	0
Parks, Experiences and Products | Other
Disaggregation of Revenue [Line Items]
Revenues		495	418	990	813
Studio Entertainment
Disaggregation of Revenue [Line Items]
Revenues	[1]	2,134	2,499	3,958	5,008
Studio Entertainment | Affiliate fees
Disaggregation of Revenue [Line Items]
Revenues		0	0	0	0
Studio Entertainment | Advertising
Disaggregation of Revenue [Line Items]
Revenues		0	0	0	0
Studio Entertainment | Theme park admissions
Disaggregation of Revenue [Line Items]
Revenues		0	0	0	0
Studio Entertainment | Resort and vacations
Disaggregation of Revenue [Line Items]
Revenues		0	0	0	0
Studio Entertainment | TV/SVOD distribution licensing
Disaggregation of Revenue [Line Items]
Revenues		709	619	1,314	1,138
Studio Entertainment | Theatrical distribution licensing
Disaggregation of Revenue [Line Items]
Revenues		745	956	1,118	2,125
Studio Entertainment | Merchandise licensing
Disaggregation of Revenue [Line Items]
Revenues		126	139	280	310
Studio Entertainment | Home entertainment
Disaggregation of Revenue [Line Items]
Revenues		263	471	688	832
Studio Entertainment | Other
Disaggregation of Revenue [Line Items]
Revenues		291	314	558	603
Direct-to-Consumer & International
Disaggregation of Revenue [Line Items]
Revenues		955	831	1,873	1,762
Direct-to-Consumer & International | Affiliate fees
Disaggregation of Revenue [Line Items]
Revenues		335	354	658	692
Direct-to-Consumer & International | Advertising
Disaggregation of Revenue [Line Items]
Revenues		357	301	774	712
Direct-to-Consumer & International | Theme park admissions
Disaggregation of Revenue [Line Items]
Revenues		0	0	0	0
Direct-to-Consumer & International | Resort and vacations
Disaggregation of Revenue [Line Items]
Revenues		0	0	0	0
Direct-to-Consumer & International | TV/SVOD distribution licensing
Disaggregation of Revenue [Line Items]
Revenues		24	28	58	53
Direct-to-Consumer & International | Theatrical distribution licensing
Disaggregation of Revenue [Line Items]
Revenues		0	0	0	0
Direct-to-Consumer & International | Merchandise licensing
Disaggregation of Revenue [Line Items]
Revenues		12	19	27	37
Direct-to-Consumer & International | Home entertainment
Disaggregation of Revenue [Line Items]
Revenues		21	24	49	54
Direct-to-Consumer & International | Other
Disaggregation of Revenue [Line Items]
Revenues		206	105	307	214
21CF
Disaggregation of Revenue [Line Items]
Revenues		373	0	373	0
21CF | Affiliate fees
Disaggregation of Revenue [Line Items]
Revenues		134	0	134	0
21CF | Advertising
Disaggregation of Revenue [Line Items]
Revenues		118	0	118	0
21CF | Theme park admissions
Disaggregation of Revenue [Line Items]
Revenues		0	0	0	0
21CF | Resort and vacations
Disaggregation of Revenue [Line Items]
Revenues		0	0	0	0
21CF | TV/SVOD distribution licensing
Disaggregation of Revenue [Line Items]
Revenues		91	0	91	0
21CF | Theatrical distribution licensing
Disaggregation of Revenue [Line Items]
Revenues		7	0	7	0
21CF | Merchandise licensing
Disaggregation of Revenue [Line Items]
Revenues		0	0	0	0
21CF | Home entertainment
Disaggregation of Revenue [Line Items]
Revenues		10	0	10	0
21CF | Other
Disaggregation of Revenue [Line Items]
Revenues		13	0	13	0
Eliminations
Disaggregation of Revenue [Line Items]
Revenues		(234)	(193)	(418)	(364)
Eliminations | Affiliate fees
Disaggregation of Revenue [Line Items]
Revenues		(12)	0	(12)	0
Eliminations | Advertising
Disaggregation of Revenue [Line Items]
Revenues		0	0	0	0
Eliminations | Theme park admissions
Disaggregation of Revenue [Line Items]
Revenues		0	0	0	0
Eliminations | Resort and vacations
Disaggregation of Revenue [Line Items]
Revenues		0	0	0	0
Eliminations | TV/SVOD distribution licensing
Disaggregation of Revenue [Line Items]
Revenues		(222)	(193)	(406)	(364)
Eliminations | Theatrical distribution licensing
Disaggregation of Revenue [Line Items]
Revenues		0	0	0	0
Eliminations | Merchandise licensing
Disaggregation of Revenue [Line Items]
Revenues		0	0	0	0
Eliminations | Home entertainment
Disaggregation of Revenue [Line Items]
Revenues		0	0	0	0
Eliminations | Other
Disaggregation of Revenue [Line Items]
Revenues		$ 0	$ 0	$ 0	$ 0

[1] Studio Entertainment revenues and operating income include an allocation of Parks, Experiences and Products revenues, which is meant to reflect royalties on sales of merchandise based on film properties. The increase to Studio Entertainment revenues and operating income and corresponding decrease to Parks, Experiences and Products revenues and operating income was $126 million and $136 million for the quarters ended March 30, 2019 and March 31, 2018, respectively, and $280 million and $307 million for the six months ended March 30, 2019 and March 31, 2018, respectively.