Other Financial Data (Accrued Liabilities) (Details) (USD $) In Millions, unless otherwise specified	Sep. 28, 2013	Dec. 31, 2012
Accrued Liabilities [Abstract]
Deferred revenue	$ 766	$ 820
Compensation	319	424
Billings in excess of costs and earnings	211	387
Tax liabilities	54	95
Customer reserves	126	144
Dividend payable	80	72
Other	647	684
Accrued liabilities	$ 2,203	$ 2,626