XML 61 R47.htm IDEA: XBRL DOCUMENT
v3.21.1

Reverse Mortgage Interests - Schedule of Reverse Mortgage Interest (Details) - USD ($) $ in Millions | Mar. 31, 2021 | Dec. 31, 2020 | Mar. 31, 2020 | Dec. 31, 2019
--- | --- | --- | --- | ---
Reverse Mortgage Interests [Abstract] |  |  |  |
Participating interests in HECM mortgage-backed securities (“HMBS”) | $ 3,304 | $ 3,471 |  |
Unsecuritized interests | 972 | 964 |  |
Other interests securitized | 908 | 945 |  |
Purchase discount, net | (93) | (127) | $ (129) | $ (114)
Total reverse mortgage interests, net | $ 5,091 | $ 5,253 |  |

X
- Definition Reverse funded loan advances + References No definition available. + Details
Name: | nsm_ReverseFundedLoanAdvances
Namespace Prefix: | nsm_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Reverse Mortgage Interest Subject to Non-Recourse Debt + References No definition available. + Details
Name: | nsm_ReverseMortgageInterestSubjecttoNonRecourseDebt
Namespace Prefix: | nsm_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Reverse Mortgage Interest, Unpaid Principal Balance, Other Interests Securitized + References No definition available. + Details
Name: | nsm_ReverseMortgageInterestUnpaidPrincipalBalanceOtherInterestsSecuritized
Namespace Prefix: | nsm_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Reverse Mortgage Interest, Unpaid Principal Balance, Purchase Discount, Net + References No definition available. + Details
Name: | nsm_ReverseMortgageInterestUnpaidPrincipalBalancePurchaseDiscountNet
Namespace Prefix: | nsm_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Reverse Mortgage Interest, Unpaid Principal Balance, Unsecuritized + References No definition available. + Details
Name: | nsm_ReverseMortgageInterestUnpaidPrincipalBalanceUnsecuritized
Namespace Prefix: | nsm_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Reverse Mortgage Interests [Abstract] + References No definition available. + Details
Name: | nsm_ReverseMortgageInterestsAbstract
Namespace Prefix: | nsm_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration