Borrowing Activity (Details) $ in Millions	3 Months Ended
	Dec. 31, 2016 USD ($)
Borrowings [Roll Forward]
Borrowings beginning balance	$ 20,170
Borrowings	1,636
Payments	(1,056)
Other Activity	(260)
Borrowings ending balance	20,490
Commercial paper with original maturities less than three months
Borrowings [Roll Forward]
Borrowings beginning balance	777
Borrowings	0	[1]
Payments	(117)	[1]
Other Activity	1
Borrowings ending balance	661
Commercial paper with original maturities greater than three months
Borrowings [Roll Forward]
Borrowings beginning balance	744
Borrowings	1,594
Payments	(745)
Other Activity	2
Borrowings ending balance	1,595
U.S. medium-term notes
Borrowings [Roll Forward]
Borrowings beginning balance	16,827
Borrowings	0
Payments	0
Other Activity	5
Borrowings ending balance	16,832
International Theme Parks borrowings
Borrowings [Roll Forward]
Borrowings beginning balance	1,087
Borrowings	13
Payments	0
Other Activity	(27)
Borrowings ending balance	1,073
Foreign currency denominated debt and other
Borrowings [Roll Forward]
Borrowings beginning balance	735
Borrowings	29
Payments	(194)
Other Activity	(241)	[2]
Borrowings ending balance	$ 329

[1] Borrowings and payments are reported net.

[2] The other activity is primarily market value adjustments for debt with qualifying hedges.