Other Financial Data (Accrued Liabilities) (Details) - USD ($) $ in Millions	Apr. 02, 2016	Dec. 31, 2015
Accrued Liabilities [Abstract]
Deferred revenue	$ 399	$ 390
Compensation	167	241
Billings in excess of costs and earnings	301	337
Tax liabilities	49	48
Dividend payable	72	71
Trade liabilities	133	135
Other	483	449
Accrued liabilities	$ 1,604	$ 1,671