Other Financial Data - Schedule of Other Non-Current Liabilities (Details) - USD ($) $ in Millions	Dec. 31, 2016	Dec. 31, 2015
Other Financial Data [Abstract]
Taxes payable	$ 288	$ 223
Leases	169	166
Deferred revenue	140	159
Compensation and benefits	56	59
Other	191	162
Total Other Non-Current Liabilities	$ 844	$ 769