v3.26.1
Income Taxes - Schedule of Effective Income Tax Rate (Details) - ISQ Open Infrastructure Company LLC Series II [Member]
6 Months Ended
Jun. 30, 2026
Schedule of Effective Income Tax Rate [Line Items]  
U.S. Partnership Federal Statutory Tax Rate
Income taxes at federal corporate tax rate 22.55%
State and Local Income Taxes (net of federal tax) 1.23%
Effective Income Tax Rate 23.78%