Segment Information Equity in the Income of Investees included in Segment Operating Results (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended
	Dec. 29, 2012	Dec. 31, 2011
Schedule of Equity Method Investments [Line Items]
Equity in the income of investees	$ 110	$ 145
Cable
Schedule of Equity Method Investments [Line Items]
Equity in the income of investees	177	150
Broadcasting
Schedule of Equity Method Investments [Line Items]
Equity in the income of investees	(13)	(6)
Equity in the Income Of Investees Included In Segment Results
Schedule of Equity Method Investments [Line Items]
Equity in the income of investees	$ 164	$ 144