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v3.19.2

Payables and Other Liabilities - Repurchase Reserves (Details) - USD ($) $ in Millions | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jun. 30, 2019 | Jun. 30, 2018 | Jun. 30, 2019 | Jun. 30, 2018
Loans Subject to Repurchase Reserve [Roll Forward] |  |  |  |
Balance - beginning of period | $ 16 | $ 9 | $ 8 | $ 9
Provisions | 8 | 2 | 16 | 3
Releases | (1) | (2) | (1) | (3)
Balance - end of period | $ 23 | $ 9 | $ 23 | $ 9

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- Definition Loans Subject to Repurchase Reserve [Roll Forward] + References No definition available. + Details
Name: | coop_LoansSubjectToRepurchaseReserveRollForward
Namespace Prefix: | coop_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

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- Definition Repurchase Reserve + References No definition available. + Details
Name: | coop_RepurchaseReserve
Namespace Prefix: | coop_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

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- Definition Repurchase Reserve, Additions + References No definition available. + Details
Name: | coop_RepurchaseReserveAdditions
Namespace Prefix: | coop_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

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- Definition Repurchase Reserve, Reductions + References No definition available. + Details
Name: | coop_RepurchaseReserveReductions
Namespace Prefix: | coop_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration