Variable Interest Entities (Details) - USD ($) $ in Millions		6 Months Ended
		Jun. 30, 2018	Jun. 30, 2017	Mar. 19, 2018	Dec. 31, 2017
Variable Interest Entities Additional Information [Abstract]
Payment for JV interests purchase		$ 19	$ 0
Total Assets	[1]	1,442			$ 1,811
Total liabilities	[1]	953			1,258
Variable Interest Entity
Variable Interest Entities Additional Information [Abstract]
Total Assets		56			66
Total liabilities		20			32
PHH Home Loans | Variable Interest Entity
Variable Interest Entities Additional Information [Abstract]
Total Assets					98
Total liabilities					$ 51
Realogy
Variable Interest Entities Additional Information [Abstract]
Payment for JV interests purchase		19
Extinguishment gain on purchase of mandatorily redeemable noncontrolling interest		$ 1
PHH Home Loans | Realogy
Variable Interest Entities Additional Information [Abstract]
Percentage of interests acquired				49.90%

[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