| Document And Entity Information | Jan. 03, 2024 |
| Cover [Abstract] | |
| Document Type | 8-K |
| Amendment Flag | false |
| Document Period End Date | Jan. 03, 2024 |
| Entity Registrant Name | TCW DIRECT LENDING VII LLC |
| Entity Central Index Key | 0001715933 |
| Entity Emerging Growth Company | false |
| Entity File Number | 814-01246 |
| Entity Incorporation, State or Country Code | DE |
| Entity Tax Identification Number | 82-2252672 |
| Entity Address, Address Line One | 200 Clarendon Street |
| 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 |
| Entity Information, Former Legal or Registered Name | Not Applicable |
| Written Communications | false |
| Soliciting Material | false |
| Pre-commencement Tender Offer | false |
| Pre-commencement Issuer Tender Offer | false |
| Title of 12(b) Security | None |
| Trading Symbol | NA |
| Security Exchange Name | NONE |
