| Label | Element | Value |
|---|---|---|
| Risk/Return: | rr_RiskReturnAbstract | |
| Registrant Name | dei_EntityRegistrantName | NORTH CAROLINA CAPITAL MANAGEMENT TRUST |
| Prospectus Date | rr_ProspectusDate | Aug. 29, 2019 |
| 06.30 North Carolina Capital Management Trust Combo PRO-09 | Term Portfolio | ||
| Risk/Return: | rr_RiskReturnAbstract | |
| Supplement to Prospectus [Text Block] | rr_SupplementToProspectusTextBlock | Supplement to the |