Segments, Geographical Area and Major Customer Information - Reconciliation of Segment Net Assets to Consolidated Total Assets (Details) - USD ($) $ in Millions	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Segment Reporting [Abstract]
Segment net assets	$ 2,917	$ 3,035	$ 3,052
Accounts payable and other current liabilities	1,091	1,261
Other current and long-term assets	318	609
Total assets	$ 4,326	$ 4,905