Segment Information Equity in the Income of Investees included in Segment Operating Results (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended		6 Months Ended
	Mar. 30, 2013	Mar. 31, 2012	Mar. 30, 2013	Mar. 31, 2012
Schedule of Equity Method Investments [Line Items]
Equity in the income of investees	$ 185	$ 138	$ 295	$ 283
Cable
Schedule of Equity Method Investments [Line Items]
Equity in the income of investees	195	149	372	299
Broadcasting
Schedule of Equity Method Investments [Line Items]
Equity in the income of investees	(10)	(11)	(23)	(17)
Equity in the Income Of Investees Included In Segment Results
Schedule of Equity Method Investments [Line Items]
Equity in the income of investees	$ 185	$ 138	$ 349	$ 282