Other Financial Data (Cash and Cash Equivalents) (Details) - USD ($) $ in Millions	Jul. 02, 2016	Dec. 31, 2015	Jul. 04, 2015	Dec. 31, 2014
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Cash and cash equivalents	$ 1,545	$ 1,980	$ 3,112	$ 3,954
Restricted cash and cash equivalents	$ 64	$ 63