Other Assets - Narrative (Details) - USD ($)	3 Months Ended
	Mar. 31, 2020	Jan. 01, 2020	Dec. 31, 2019	Feb. 01, 2019
Other Assets [Line Items]
Goodwill	$ 120,000,000		$ 120,000,000
Impairment expense	0
REO loans with government guarantee	12,000,000		11,000,000
Accounting Standards Update 2016-13 | Trade Accounts Receivable
Other Assets [Line Items]
Allowance for credit losses	6,000,000
Cumulative Effect, Period of Adoption, Adjustment | Accounting Standards Update 2016-13 | Other Assets
Other Assets [Line Items]
Allowance for credit losses		$ (2,000,000)
Corporate and Other
Other Assets [Line Items]
Impairment expense	$ 4,000,000
Pacific Union
Other Assets [Line Items]
Goodwill			40,000,000	$ 40,000,000
Intangible assets			$ 13,000,000