XML 58 R44.htm IDEA: XBRL DOCUMENT
v3.21.1

Advances and Other Receivables - Advances and Other Receivables Roll Forward (Details) - USD ($) $ in Millions | 3 Months Ended
--- | ---
Mar. 31, 2021 | Mar. 31, 2020
Advances And Other Receivables, Reserves [Roll Forward] |  |
Balance - beginning of period | $ 208 | $ 168
Provision and other additions | 15 | 30
Write-offs | (17) | (5)
Balance - end of period | 206 | 193
Cumulative incurred losses related to advances and other receivables associated with inactive and liquidated loans | $ 12 | $ 10

X
- Definition Advances And Other Receivables, Reserves [Roll Forward] + References No definition available. + Details
Name: | nsm_AdvancesAndOtherReceivablesReservesRollForward
Namespace Prefix: | nsm_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Advances And Other Receivables, Servicing Reserves, Write-Offs + References No definition available. + Details
Name: | nsm_AdvancesAndOtherReceivablesServicingReservesWriteOffs
Namespace Prefix: | nsm_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Advances and Other Receivables, Servicing Reserves + References No definition available. + Details
Name: | nsm_AdvancesandOtherReceivablesServicingReserves
Namespace Prefix: | nsm_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Advances and Other Receivables, Servicing Reserves, Provision And Other Additions + References No definition available. + Details
Name: | nsm_AdvancesandOtherReceivablesServicingReservesProvisionAndOtherAdditions
Namespace Prefix: | nsm_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Gain (Loss) On Advances And Other Receivables Related To Inactive And Liquidated Loans + References No definition available. + Details
Name: | nsm_GainLossOnAdvancesAndOtherReceivablesRelatedToInactiveAndLiquidatedLoans
Namespace Prefix: | nsm_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration