v3.25.2
N-2 - $ / shares
 6 Months Ended
Jun. 30, 2025
Dec. 31, 2024
Jun. 30, 2024
Dec. 31, 2023
Cover [Abstract]        
Entity Central Index Key 0001825265      
Amendment Flag false      
Securities Act File Number 814-01420      
Document Type 10-Q      
Entity Registrant Name TCW DIRECT LENDING VIII LLC      
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 Emerging Growth Company true      
Entity Ex Transition Period false      
General Description of Registrant [Abstract]        
Risk Factors [Table Text Block]

Item 1A. Risk Factors

In addition to the other information set forth in this report, you should carefully consider the risk factor discussed below and the risk factors in our Annual Report on Form 10-K for the fiscal year ended December 31, 2024, which could materially affect our business, financial condition and/or operating results. Additional risks and uncertainties not currently known to us or that we currently deem to be immaterial also may materially and adversely affect our business, financial condition and/or operating results.

Changes to U.S. tariff and import/export regulations may have a negative effect on our portfolio companies and, in turn, on our performance.

There have been significant changes to United States trade policies, agreements and tariffs, and in the future there may be additional significant changes. These and any future developments, and continued uncertainty surrounding trade policies, agreements and tariffs, may have a material adverse effect on global economic conditions, inflation and the stability of global financial markets, and may significantly reduce global trade and, in particular, trade between the impacted nations and the United States. Any of these factors could depress economic activity and restrict our portfolio companies' access to suppliers or customers, increase their supply-chain costs and expenses and could have material adverse effects on our business, financial condition and results of operations.

      
NAV Per Share $ 94.78 $ 96.87 $ 98.61 $ 98.95