Discontinued Operations (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017	Dec. 31, 2017
Results of Operations
Net revenues	$ 2	$ 81	$ 9	$ 155
Total expenses	0	90	11	192
Loss before income taxes	2	(9)	(2)	(37)
Income tax benefit	0	(1)	0	(11)
Net loss	2	(8)	(2)	(26)
Less: net loss attributable to noncontrolling interest	0	(4)	0	(8)
Income (loss) from discontinued operations attributable to PHH Corporation, net of tax	2	$ (4)	(2)	(18)
ASSETS
Cash and cash equivalents	0		0		$ 33
Restricted cash	1		1		8
Mortgage loans held for sale	3		3		167
Accounts receivable, net	0		0		5
Other assets	0		0		1
Total assets related to discontinued operations	4		4		214
LIABILITIES
Accounts payable and accrued expenses	8		8		43
Mortgage warehouse and advance facilities	1		1		135
Mandatorily redeemable noncontrolling interest	0		0		20
Other liabilities	0		0		1
Total liabilities related to discontinued operations	9		9		$ 199
Cash Flows
Capitalization of originated mortgage servicing rights			(2)	(10)
Origination of mortgage loans held for sale			(52)	(3,185)
Proceeds on sale of and payments from mortgage loans held for sale			208	3,226
Net gain on interest rate lock commitments, mortgage loans held for sale and related derivatives			(1)	(100)
Deferred income tax benefit			0	$ (11)
Lease related guaranty | LenderLive Network, LLC
Off-Balance Sheet Arrangements and Guarantees
Amount of potential future lease payments under guarantee	12		12
Lease related guaranty | Guaranteed Rate Affinity, LLC
Off-Balance Sheet Arrangements and Guarantees
Amount of potential future lease payments under guarantee	$ 1		$ 1