v3.26.1
Derivative Instruments - Schedule of Aggregate Notional Amount and Fair Value of the Derivative Instruments (Details) - 6 months ended Jun. 30, 2026 - ISQ Open Infrastructure Company LLC - Series II [Member] - Foreign Currency Contracts [Member]
USD ($)
EUR (€)
EUR (€)
Derivatives, Fair Value [Line Items]      
Fair Value $ (24,605)    
Realized gain (loss)    
Unrealized gain (loss) (24,605)    
U.S. dollar/Sell British pound [Member]      
Derivatives, Fair Value [Line Items]      
Notional Amount (in Euro) | €     € 5,698,882
Fair Value (8,304)    
Average Notional Amount (in Euro) | €   € 5,031,959  
Realized gain (loss)    
Unrealized gain (loss) (8,304)    
U.S. dollar/Sell Euro [Member]      
Derivatives, Fair Value [Line Items]      
Notional Amount (in Euro) | €     2,294,662
Fair Value (15,601)    
Average Notional Amount (in Euro) | €   2,294,662  
Realized gain (loss)    
Unrealized gain (loss) (15,601)    
British pound/Sell U.S. dollar [Member]      
Derivatives, Fair Value [Line Items]      
Notional Amount (in Euro) | €     € 119,454
Fair Value (700)    
Average Notional Amount (in Euro) | €   € 119,454  
Realized gain (loss)    
Unrealized gain (loss) $ (700)