Income Taxes - Temporary Differences and Carryforwards Giving Rise to DTAs and Liabilities (Details) - USD ($) $ in Millions	Dec. 31, 2019	Dec. 31, 2018
Deferred tax assets
Net operating loss carryforwards (Federal and State)	$ 43	$ 58
Allowance for loan losses	26	30
Accrued compensation	12	10
Litigation settlement	9	14
Lease liability	6	0
Contingent consideration	4	3
General business credits	0	7
General business reserves	2	10
Other	11	11
Total	113	143
Valuation allowance	(5)	(14)
Total net	108	129
Deferred tax liabilities
Mark-to-market adjustments	(12)	(11)
Premises and equipment	(7)	(8)
State and local taxes	(7)	(3)
Commercial lease financing	(5)	(4)
Mortgage loan servicing rights	(5)	0
Right of use asset	(6)	0
Total	(42)	(26)
Net deferred tax asset	$ 66	$ 103