Other Financial Data (Accrued Liabilities) (Details) (USD $) In Millions, unless otherwise specified	Sep. 29, 2012	Dec. 31, 2011
Accrued Liabilities [Abstract]
Deferred revenue	$ 799	$ 774
Billings in excess of costs and earnings	389	250
Compensation	352	471
Tax liabilities	70	126
Customer reserves	126	125
Dividend payable	73	70
Networks purchase price adjustment	0	96
Other	666	821
Accrued liabilities	$ 2,475	$ 2,733