Other Financial Data (Accrued Liabilities) (Details) - USD ($) $ in Millions	Oct. 03, 2015	Dec. 31, 2014
Accrued Liabilities [Abstract]
Deferred revenue	$ 363	$ 355
Compensation	216	190
Billings in excess of costs and earnings	357	358
Tax liabilities	59	91
Dividend payable	60	75
Other	527	637
Accrued liabilities	$ 1,582	$ 1,706