Other Financial Data - Schedule of Other Non-current Liabilities (Details) - USD ($) $ in Millions	Jun. 30, 2017	Dec. 31, 2016
Other Financial Data [Abstract]
Taxes payable	$ 326	$ 288
Deferred revenue	46	49
Leases	140	136
Compensation and benefits	59	56
Other	287	190
Total	$ 858	$ 719