Commitments and Contingencies - Loan Repurchases and Indemnifications (Details) - USD ($) $ in Millions	Dec. 31, 2017	Dec. 31, 2016
Commitments and Contingencies Disclosure [Abstract]
Loan repurchase and indemnification liability	$ 29	$ 49
Loans with full risk of loss or with respect to which the company has identified a breach of representation and warranty provisions	$ 46
Percentage of loans with full risk of loss or with respect to which the company has identified a breach of representation and warranty provisions and are at least 90 days delinquent	23.00%

Represents the percentage of loans having full risk of loss or with respect to which the entity has identified a breach of representation and warranty provisions and which are minimum 90 days delinquent.

No definition available.

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Namespace Prefix:	phh_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant