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Advances and Other Receivables - Advances and Other Receivables Roll Forward (Details) - USD ($) $ in Millions | 3 Months Ended
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Mar. 31, 2025 | Mar. 31, 2024
Reserves for Advances and Other Receivables |  |
Balance - beginning of period | $ 112 | $ 170
Provision(1) | (14) | (15)
Reclassifications(2) | (1) | 9
Write-offs(3) | (8) | (50)
Balance - end of period | 117 | 144
Reclassifications to reserve provision(2) | $ (6) | $ (6)

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- Definition Advances And Other Receivables, Reserves [Roll Forward] + References No definition available. + Details
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- Definition Advances and Other Receivables, Servicing Reserves, Other Additions + References No definition available. + Details
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Data Type: | xbrli:monetaryItemType
Balance Type: | credit
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- Definition Advances And Other Receivables, Servicing Reserves, Write-Offs + References No definition available. + Details
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- Definition Advances and Other Receivables, Servicing Reserves + References No definition available. + Details
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- Definition Gain (Loss) On Advances And Other Receivables Related To Inactive And Liquidated Loans + References No definition available. + Details
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- Definition Reserves for Advances and Other Receivables, Provision Additions + References No definition available. + Details
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Namespace Prefix: | coop_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration