Other Long-Term Liabilities - Schedule of Other Long-Term Liabilities (Details) (USD $) In Millions, unless otherwise specified	Dec. 31, 2014		Dec. 31, 2013
Other Liabilities Noncurrent [Abstract]
Unrecognized tax benefits	$ 68	[1]	$ 38	[1]
Construction liabilities	67	[2]	8	[2]
Other	19	[3]	6	[3]
Total other long-term liabilities	$ 154		$ 52

[1] See “Note 9—Income Taxes” for additional information on our unrecognized tax benefits. Amount includes accrued interest related to this liability.

[2] We capitalize construction in progress and record a corresponding long-term liability for build-to-suit lease agreements where we are considered the owner during the construction period for accounting purposes only. Refer to “Note 12 – Commitments and Contingencies,” for additional information on our future corporate headquarters lease.

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