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v3.25.2

Advances and Other Receivables - Purchase Discount (Details) - USD ($) $ in Millions | Jun. 30, 2025 | Dec. 31, 2024 | Jun. 30, 2024
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Receivables [Abstract] |  |  |
Servicing advances discount | $ 5 | $ 6 | $ 12

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- Definition Servicing Advances, Discount + References No definition available. + Details
Name: | coop_ServicingAdvancesDiscount
Namespace Prefix: | coop_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

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- References No definition available. + Details
Name: | us-gaap_ReceivablesAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration