Commitments and Contingencies - Schedule of Lease Supplemental Balance Sheet Information (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2019	Jan. 01, 2019
Lessee, Lease, Description [Line Items]
Operating lease assets	$ 18
Finance lease assets	10
Total lease assets	28
Operating leases
Current liability	9
Noncurrent liability	9
Total operating lease liability	18
Finance leases
Current liability	2
Noncurrent liability	9
Total finance lease liability	$ 11
Weighted average remaining lease term
Operating leases	3 years
Finance leases	4 years
Weighted average discount rate
Operating leases	9.06%
Finance leases	26.53%
Right-of-use asset obtained in exchange for operating lease liability	$ 16
ASU 2016-02
Lessee, Lease, Description [Line Items]
Operating lease assets		$ 10
Operating leases
Total operating lease liability		$ 10