Label | Element | Value |
---|---|---|
Risk Return Abstract | rr_RiskReturnAbstract | |
Registrant Name | dei_EntityRegistrantName | NORTHWESTERN MUTUAL SERIES FUND, INC. |
Prospectus Date | rr_ProspectusDate | May 01, 2025 |
Document Creation Date | dei_DocumentCreationDate | Apr. 24, 2025 |