Fair Value Measurement and Disclosures - Schedule of Investments and Cash and Cash Equivalents in Fair Value Hierarchy (Details) - ISQ Open Infrastructure Company LLC - Series II [Member]	Dec. 31, 2025 USD ($)
Investments at fair value
Total financial liabilities	$ 183,179,945
Level I [Member]
Investments at fair value
Total financial liabilities
Level II [Member]
Investments at fair value
Total financial liabilities
Level III [Member]
Investments at fair value
Total financial liabilities	183,179,945
Equity Investments [Member]
Investments at fair value
Total financial liabilities	167,053,547
Equity Investments [Member] | Level I [Member]
Investments at fair value
Total financial liabilities
Equity Investments [Member] | Level II [Member]
Investments at fair value
Total financial liabilities
Equity Investments [Member] | Level III [Member]
Investments at fair value
Total financial liabilities	167,053,547
Debt Investments [Member]
Investments at fair value
Total financial liabilities	16,126,398
Debt Investments [Member] | Level I [Member]
Investments at fair value
Total financial liabilities
Debt Investments [Member] | Level III [Member]
Investments at fair value
Total financial liabilities	$ 16,126,398