Acquisitions Acquisition Fair Value of Assets Acquired and Liabilities Assumed (Details) - USD ($) $ in Millions		Sep. 28, 2019	Mar. 20, 2019	Sep. 29, 2018	Sep. 30, 2017
Business Acquisition [Line Items]
Goodwill		$ 80,293		$ 31,269	$ 31,426
TFCF | Initial Allocation
Business Acquisition [Line Items]
Cash and cash equivalents	[1]		$ 25,666
Receivables	[1]		4,746
Film and television costs	[1]		20,120
Investments	[1]		1,471
Intangible assets	[1]		20,385
Net assets held for sale	[1]		11,704
Accounts payable and other liabilities	[1]		(10,753)
Borrowings	[1]		(21,723)
Deferred income taxes	[1]		(6,497)
Other net liabilities acquired	[1]		(3,865)
Noncontrolling interests	[1]		(10,638)
Goodwill	[1]		43,751
Fair value of net assets acquired	[1]		74,367
Parents Previously Held Equity Interest in Investee Now Consolidated	[1]		(4,860)
Total purchase price	[1]		69,507
TFCF | Valuation Adjustments
Business Acquisition [Line Items]
Cash and cash equivalents			35
Receivables			484
Film and television costs			(2,322)
Investments			(507)
Intangible assets			(2,504)
Net assets held for sale			(338)
Accounts payable and other liabilities			(1,606)
Borrowings			0
Deferred income taxes			1,164
Other net liabilities acquired			(93)
Noncontrolling interests			230
Goodwill			5,334
Fair value of net assets acquired			(123)
Parents Previously Held Equity Interest in Investee Now Consolidated			123
Total purchase price			0
TFCF | Updated Allocation
Business Acquisition [Line Items]
Cash and cash equivalents			25,701
Receivables			5,230
Film and television costs			17,798
Investments			964
Intangible assets			17,881
Net assets held for sale			11,366
Accounts payable and other liabilities			(12,359)
Borrowings			(21,723)
Deferred income taxes			(5,333)
Other net liabilities acquired			(3,958)
Noncontrolling interests			(10,408)
Goodwill			49,085
Fair value of net assets acquired			74,244
Parents Previously Held Equity Interest in Investee Now Consolidated			(4,737)
Total purchase price			$ 69,507

[1] As reported in our March 30, 2019 Form 10-Q.