Financial Information by Operating Segments (Parenthetical) (Detail) (USD $) In Millions, unless otherwise specified	3 Months Ended
	Dec. 31, 2011	Jan. 01, 2011
Studio Entertainment
Segment Reporting Information [Line Items]
Increases/(decreases) allocations on segment revenues and operating income	$ 76	$ 73
Consumer Products
Segment Reporting Information [Line Items]
Increases/(decreases) allocations on segment revenues and operating income	(76)	(72)
Interactive Media
Segment Reporting Information [Line Items]
Increases/(decreases) allocations on segment revenues and operating income		$ (1)