| Cover | Dec. 11, 2024 |
| Cover [Abstract] | |
| Document Type | 8-K |
| Amendment Flag | false |
| Document Period End Date | Dec. 11, 2024 |
| Entity File Number | 814-01246 |
| Entity Registrant Name | TCW Direct Lending VII LLC |
| Entity Central Index Key | 0001715933 |
| Entity Tax Identification Number | 82-2252672 |
| Entity Incorporation, State or Country Code | DE |
| Entity Address, Address Line One | 200 Clarendon Street |
| Entity Address, Address Line Two | 51st Floor |
| Entity Address, City or Town | Boston |
| Entity Address, State or Province | MA |
| Entity Address, Postal Zip Code | 02116 |
| City Area Code | (617) |
| Local Phone Number | 936-2275 |
| Written Communications | false |
| Soliciting Material | false |
| Pre-commencement Tender Offer | false |
| Pre-commencement Issuer Tender Offer | false |
| Entity Emerging Growth Company | true |
| Elected Not To Use the Extended Transition Period | false |
