Name:	pfsi_AggregateCashGainLossOnSaleOfMortgageLoansHeldForSaleNetOfCashHedgingResults
Namespace Prefix:	pfsi_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

Not applicable.

No definition available.

Name:	pfsi_CashPortionOfGainLossOnMortgageLoansHeldForSaleAbstract
Namespace Prefix:	pfsi_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

Represents the change in fair value hedging instruments still held at period end.

No definition available.

Name:	pfsi_ChangeInFairValueHedgingInstrumentsStillHeldAtPeriodEnd
Namespace Prefix:	pfsi_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

The gains (losses) that represent change in fair value of commitments to purchase or originate mortgage loans at specified interest rates.

No definition available.

Name:	pfsi_ChangeInFairValueOfCommitmentsToPurchaseLoans
Namespace Prefix:	pfsi_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

Not available.

No definition available.

Name:	pfsi_ChangeInFairValueOfMortgageLoansAndRelatedHedgingInstrumentsStillHeldAtPeriodEndAbstract
Namespace Prefix:	pfsi_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

Represents the change in fair value relating to mortgage loans still held at period end.

No definition available.

Name:	pfsi_ChangeInFairValueRelatingToMortgageLoansStillHeldAtPeriodEnd
Namespace Prefix:	pfsi_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

Represents the cash portion of gains (losses) on sale of mortgage loans held for sale determined by subtracting the purchase price of the mortgage loan from the proceeds received on sale.

No definition available.

Name:	pfsi_GainLossOnSaleOfMortgageLoansHeldForSaleCashPortion
Namespace Prefix:	pfsi_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

Represents the cash portion of gains (losses) on hedging activities of mortgage loans held for sale.

No definition available.

Name:	pfsi_MortgageLoanHeldForSaleHedgingActivitiesCashGainLoss
Namespace Prefix:	pfsi_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- References

No definition available.

Name:	pfsi_NonCashPortionOfGainLossOnMortgageLoansHeldForSaleAbstract
Namespace Prefix:	pfsi_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

Represents the adjustment to previously recorded provisions for representations and warranties losses, due to change in estimate.

No definition available.

Name:	pfsi_ProvisionsForRepresentationsAndWarrantiesLossesAdjustmentToPreviouslyRecordedAmountChangeInEstimate
Namespace Prefix:	pfsi_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

Represents the provisions for representations and warranties losses pursuant to mortgage loan sales.

No definition available.

Name:	pfsi_ProvisionsForRepresentationsAndWarrantiesLossesPursuantToMortgageLoanSales
Namespace Prefix:	pfsi_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

Represents the receipt of mortgage servicing rights (MSRs), net of accruals for mortgage servicing liabilities, as proceeds from sales of loans.

No definition available.

Name:	pfsi_ReceiptOfMortgageServicingRightsAccrualOfMortgageServicingLiabilitiesNetAsProceedsFromSalesOfLoans
Namespace Prefix:	pfsi_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

The net gain (loss) resulting from a sale of loans, including adjustments to record loans classified as held-for-sale at the lower-of-cost-or-market and fair value adjustments to loan held for investment purposes.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Name Accounting Standards Codification
-Section 45
-Paragraph 28
-Subparagraph (b)
-SubTopic 10
-Topic 230
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482740/230-10-45-28

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Topic 942
-SubTopic 220
-Name Accounting Standards Codification
-Section S99
-Paragraph 1
-Subparagraph (SX 210.9-04(13)(h))
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147478524/942-220-S99-1