Segment Information (Details) $ in Millions		3 Months Ended		6 Months Ended
		Jun. 30, 2018 USD ($)	Jun. 30, 2017 USD ($)	Jun. 30, 2018 USD ($) segment	Jun. 30, 2017 USD ($)	Dec. 31, 2017 USD ($)
Segment Reporting [Abstract]
Number of reportable segments | segment				2
Segment Information
Total Assets	[1]	$ 1,442		$ 1,442		$ 1,811
Net Revenues		35	$ 31	85	$ 71
Segment Loss		(36)	(75)	(62)	(152)
Other
Segment Information
Segment Loss		(1)	(25)	(5)	(60)
Mortgage Servicing segment | Operating segment
Segment Information
Net Revenues		29	21	73	48
Segment Loss		(21)	(43)	(27)	(77)
Mortgage Production segment
Segment Information
Net Revenues		6		12
Mortgage Production segment | Operating segment
Segment Information
Net Revenues		6	10	12	23
Segment Loss		(14)	$ (7)	(30)	$ (15)
Continuing Operations | Other
Segment Information
Total Assets		474		474		487
Continuing Operations | Mortgage Servicing segment | Operating segment
Segment Information
Total Assets		861		861		919
Continuing Operations | Mortgage Production segment | Operating segment
Segment Information
Total Assets		103		103		191
Discontinued Operations
Segment Information
Total Assets		$ 4		$ 4		$ 214

[1] The Condensed Consolidated Balance Sheets include assets and liabilities of variable interest entities which can be used only to settle the obligations and liabilities of the variable interest entities which creditors or beneficial interest holders do not have recourse to PHH Corporation and subsidiaries. Refer to Note 12, 'Variable Interest Entities' for information about PHH Home Loans, LLC, whose assets and liabilities are part of the Company's discontinued operations, and as of June 30, 2018 is no longer a variable interest entity. The following assets and liabilities relate solely to risks associated with the Company's ongoing involvement in Servicing Advance Receivables Trust: June 30, 2018 December 31, 2017ASSETS Restricted cash$10 $10Servicing advances, net46 56Total assets$56 $66Assets held as collateral$56 $66 LIABILITIES Mortgage warehouse and advance facilities$20 $32Total liabilities$20 $32