Reconciliation of Segment Operating Income to Income before Income Taxes (Detail) (USD $) In Millions, unless otherwise specified	3 Months Ended
	Dec. 31, 2011		Jan. 01, 2011
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Segment operating income	$ 2,444	[1]	$ 2,208	[1]
Restructuring and impairment charges	(6)		(12)
Other income			75
Net interest expense	(90)		(95)
Income before income taxes	2,241		2,064
Corporate and unallocated shared expenses
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Segment operating income	$ (107)		$ (112)

[1] Studio Entertainment segment revenues and operating income include an allocation of Consumer Products and Interactive Media revenues which is meant to reflect royalties on sales of merchandise based on certain Studio film properties. The increases/(decreases) related to these allocations on segment revenues and operating income as reported in the above table are as follows: Quarter Ended Dec. 31, 2011 Jan. 1, 2011 Studio Entertainment $ 76 $ 73 Consumer Products (76 ) (72) Interactive Media - (1) $- $ -