XML 66 R45.htm IDEA: XBRL DOCUMENT
v3.20.4

Significant Accounting Policies - Narrative (Details) - USD ($) $ in Millions | 5 Months Ended | 7 Months Ended | 12 Months Ended
--- | --- | --- | ---
Dec. 31, 2018 | Jul. 31, 2018 | Dec. 31, 2020 | Dec. 31, 2019
Derivative [Line Items] |  |  |  |
Mortgage loan sale period |  |  | 30 days |
Advertising costs | $ 17 | $ 33 | $ 38 | $ 33
Mortgage Servicing Rights Financing |  |  |  |
Derivative [Line Items] |  |  |  |
Mortgage servicing rights financing - fair value |  |  | $ 33 | $ 37
Minimum |  |  |  |
Derivative [Line Items] |  |  |  |
Loan commitment period |  |  | 30 days |
Maximum |  |  |  |
Derivative [Line Items] |  |  |  |
Loan commitment period |  |  | 90 days |

X
- Definition Loan Commitment Period + References No definition available. + Details
Name: | coop_LoanCommitmentPeriod
Namespace Prefix: | coop_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

X
- Definition Mortgage Loan Sale Period + References No definition available. + Details
Name: | coop_MortgageLoanSalePeriod
Namespace Prefix: | coop_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

X
- Definition Mortgage Servicing Rights Liability Resulting from Sale or Securitization of Servicer Advances, Rights not Accounted for as a Sale + References No definition available. + Details
Name: | coop_MortgageServicingRightsLiabilityResultingfromSaleofServicerAdvancesRightsnotAccountedforasaSale
Namespace Prefix: | coop_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References No definition available. + Details
Name: | us-gaap_DerivativeLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition The total expense recognized in the period for promotion, public relations, and brand or product advertising. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SX 210.5-03.4) -URI http://asc.fasb.org/extlink&oid=120395209&loc=SL114868664-224227 + Details
Name: | us-gaap_MarketingAndAdvertisingExpense
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Details
Name: | us-gaap_FinancialInstrumentAxis=coop_MortgageServicingRightLiabilityMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_RangeAxis=srt_MinimumMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_RangeAxis=srt_MaximumMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |