Borrowing Activity (Details) $ in Millions	9 Months Ended
	Jun. 29, 2019 USD ($)
Borrowings [Roll Forward]
Borrowings beginning balance	$ 20,874
Borrowings	36,327
Payments	(21,013)
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Financial Liabilities	22,792
Other Activity	355
Borrowings ending balance	59,335
Commercial paper with original maturities less than three months
Borrowings [Roll Forward]
Borrowings beginning balance	50
Borrowings	819	[1]
Payments	0	[1]
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Financial Liabilities	0	[1]
Other Activity	19
Borrowings ending balance	888
Commercial paper with original maturities greater than three months
Borrowings [Roll Forward]
Borrowings beginning balance	955
Borrowings	4,110
Payments	(1,956)
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Financial Liabilities	0
Other Activity	17
Borrowings ending balance	3,126
U.S. and European notes
Borrowings [Roll Forward]
Borrowings beginning balance	17,942
Borrowings	0
Payments	(2,250)
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Financial Liabilities	21,174
Other Activity	(66)
Borrowings ending balance	36,800
Bridge Loan
Borrowings [Roll Forward]
Borrowings beginning balance	0
Borrowings	31,100
Payments	(16,100)
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Financial Liabilities	0
Other Activity	0
Borrowings ending balance	15,000
Asia International Theme Parks borrowings
Borrowings [Roll Forward]
Borrowings beginning balance	1,145
Borrowings	0
Payments	(48)
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Financial Liabilities	0
Other Activity	44
Borrowings ending balance	1,141
Foreign currency denominated debt and other
Borrowings [Roll Forward]
Borrowings beginning balance	782
Borrowings	248
Payments	(641)
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Financial Liabilities	549
Other Activity	341	[2]
Borrowings ending balance	1,279
Continuing Operations
Borrowings [Roll Forward]
Borrowings beginning balance	20,874
Borrowings	36,277
Payments	(20,995)
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Financial Liabilities	21,723
Other Activity	355
Borrowings ending balance	58,234
Discontinued Operations, Held-for-sale
Borrowings [Roll Forward]
Borrowings beginning balance	0
Borrowings	50
Payments	(18)
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Financial Liabilities	1,069
Other Activity	0
Borrowings ending balance	$ 1,101

[1] Borrowings and reductions of borrowings are reported net.

[2] The other activity is due to market value adjustments for debt with qualifying hedges, partially offset by the impact of changes in foreign currency exchange rates.