Segments, Geographical Area and Major Customer Information - Reconciliation of Segment Net Assets to Consolidated Total Assets (Details) - USD ($) $ in Millions	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Segment Reporting [Abstract]
Segment net assets	$ 3,355	$ 2,894	$ 3,024
Accounts payable and other current liabilities	1,254	1,090
Other current and long-term assets	251	317
Total assets	$ 4,860	$ 4,301