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Reverse Mortgage Interests, Net - Unsecuritized Interest (Details) - USD ($) $ in Millions | Mar. 31, 2019 | Dec. 31, 2018
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Reverse Mortgage Interest [Abstract] |  |
Repurchased HECM loans (exceeds 98% MCA) | $ 941 | $ 949
HECM related receivables | 270 | 300
Funded borrower draws not yet securitized | 114 | 76
REO-related receivables | 24 | 16
Purchase discount | (95) | (122)
Total unsecuritized interests | $ 1,254 | $ 1,219

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- Definition Reverse Mortgage Interest [Abstract] + References No definition available. + Details
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- Definition Reverse Mortgage Interest, Unpaid Principal Balance, Unsecuritized + References No definition available. + Details
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Data Type: | xbrli:monetaryItemType
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- Definition Reverse Mortgage Interest, Unpaid Principal Balance, Unsecuritized, Funded Draws Not Yet Securitized + References No definition available. + Details
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- Definition Reverse Mortgage Interest, Unpaid Principal Balance, Unsecuritized, Home Equity Conversion Mortgage Receivables + References No definition available. + Details
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- Definition Reverse Mortgage Interest, Unpaid Principal Balance, Unsecuritized, Purchase Discount + References No definition available. + Details
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- Definition Reverse Mortgage Interest, Unpaid Principal Balance, Unsecuritized, Real Estate Owned Related Receivables + References No definition available. + Details
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- Definition Reverse Mortgage Interest, Unpaid Principal Balance, Unsecuritized, Repurchase of Home Equity Conversion Mortgages + References No definition available. + Details
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Namespace Prefix: | coop_
Data Type: | xbrli:monetaryItemType
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