Other Financial Data - Schedule of Other Non-current Liabilities (Details) - USD ($) $ in Millions	Sep. 30, 2016	Dec. 31, 2015
Other Financial Data [Abstract]
Taxes payable	$ 268	$ 223
Deferred revenue	152	159
Leases	169	166
Compensation and benefits	56	59
Other	114	162
Total	$ 759	$ 769