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v3.19.2

Reverse Mortgage Interests, Net - Reserves Roll Forward (Details) - USD ($) $ in Millions | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jun. 30, 2019 | Jun. 30, 2018 | Jun. 30, 2019 | Jun. 30, 2018
Reverse Mortgage Interests Reserves [Roll Forward] |  |  |  |
Balance - beginning of period | $ 8 | $ 134 | $ 13 | $ 115
Provision (release), net | 2 | (6) | 2 | 20
Write-offs | (2) | (11) | (7) | (18)
Balance - end of period | $ 8 | $ 117 | $ 8 | $ 117

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- Definition Reverse Funded Loan Advances, Reserves + References No definition available. + Details
Name: | coop_ReverseFundedLoanAdvancesReserves
Namespace Prefix: | coop_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

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- Definition Reverse Mortgage Interests Reserves [Roll Forward] + References No definition available. + Details
Name: | coop_ReverseMortgageInterestsReservesRollForward
Namespace Prefix: | coop_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

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- Definition Reverse Mortgage Reserves, Period Decrease Related to Charge Offs + References No definition available. + Details
Name: | coop_ReverseMortgageReservesPeriodDecreaseRelatedtoChargeOffs
Namespace Prefix: | coop_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

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- Definition Reverse Mortgage Reserves, Period Increase (Decrease) Through Provision (Release) For Loan Loss Adjustments + References No definition available. + Details
Name: | coop_ReverseMortgageReservesPeriodIncreaseDecreaseThroughProvisionReleaseForLoanLossAdjustments
Namespace Prefix: | coop_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration