v3.26.1
N-2 - $ / shares
 6 Months Ended
Jun. 30, 2026
Dec. 31, 2025
 [1]
Jun. 30, 2025
Dec. 31, 2024
Cover [Abstract]        
Entity Central Index Key 0001916608      
Amendment Flag false      
Securities Act File Number 814-01566      
Document Type 10-Q      
Entity Registrant Name TCW STAR DIRECT LENDING 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

There have been no material changes from the risk factors previously disclosed in our Annual Report on Form 10-K.

     
NAV Per Share [2] $ 93.17 [1] $ 91.75 $ 93.91 $ 95.13
[1] Net Asset Value Per Unit (accrual base) equates to the aggregate of the Total Members' Capital and Common Unitholders' undrawn commitment divided by total Common Units outstanding.
[2] Per unit data was calculated using the number of Units issued and outstanding as of June 30, 2026 and 2025.