Segments, Geographical Area and Major Customer Information - Reconciliation of Segment Net Assets to Consolidated Total Assets (Details) - USD ($) $ in Millions	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Segment Reporting [Abstract]
Segment net assets	$ 4,167	$ 3,009	$ 2,969
Accounts payable and other current liabilities	1,723	1,672
Other current and long-term assets	1,330	1,237
Total assets	$ 7,220	$ 5,918