Other Long-Term Liabilities - Schedule of Other Long-Term Liabilities (Details) - USD ($) $ in Millions		Sep. 30, 2019	Dec. 31, 2018
Other Liabilities Noncurrent [Abstract]
Unrecognized tax benefits		$ 163	$ 148
Long-term income taxes payable		31	31
Financing obligation, net of current portion	[1]		83
Finance lease liabilities, net of current portion	[1]	79
Operating lease liabilities, net of current portion	[1]	66
Other	[1]	5	20
Total other long term liabilities		$ 344	$ 282	[2]

[1] Refer to “Note 2: Significant Accounting Policies” for additional information on our lease information, including transition accounting and updated accounting policy for leases upon adoption of ASC 842.

[2] Refer to the below discussion regarding the transition accounting for operating and finance leases upon adoption of ASC 842.