Commitments and Contingencies (Tables)

3 Months Ended

Mar. 31, 2019

Text Block [Abstract]

Operating Leases Of Lessee Disclosure

	As of
$ in millions	March 31, 2019		Balance Sheet Location
Right-of-use asset	$	23	Other assets
Lease liability	$	23	Other liabilities
Weighted average remaining lease term (years)		8.2
Discount rate used for operating leases		7.5%
Total future minimum lease payments	$	35