Other Financial Data - Accrued Liabilities (Details) - USD ($) $ in Millions	Apr. 01, 2017	Dec. 31, 2016
Accrued Liabilities [Abstract]
Deferred revenue	$ 473	$ 439
Compensation	176	250
Billings in excess of costs and earnings	391	434
Tax liabilities	93	111
Dividend payable	77	77
Trade liabilities	154	180
Other	544	620
Accrued liabilities	$ 1,908	$ 2,111