Other Long-Term Liabilities - Schedule of Other Long-Term Liabilities (Details) - USD ($) $ in Millions		Dec. 31, 2016	Dec. 31, 2015
Other Liabilities Noncurrent [Abstract]
Unrecognized tax benefits	[1]	$ 108	$ 87
Financing obligation, net of current portion	[2]	84	84
Other	[3]	18	18
Total other long term liabilities		$ 210	$ 189

[1] See “Note 10—Income Taxes” for additional information on our unrecognized tax benefits. Amount includes accrued interest related to this liability.

[2] Refer to “Note 13 – Commitments and Contingencies,” for additional information on our corporate headquarters lease.

[3] Amounts primarily consist of long term deferred rent balances related to operating leases for office space.