Shareholders' Equity - Schedule of Issued Share Under the DRIP (Details) - ISQ Open Infrastructure Company LLC Series II [Member] - USD ($)	3 Months Ended	6 Months Ended
	Jun. 30, 2026	Jun. 30, 2026
Class of Stock [Line Items]
Shares Reinvested	56,980	73,191
Dollars Reinvested	$ 1,846,332	$ 2,345,556
F-STE Shares [Member]
Class of Stock [Line Items]
Shares Reinvested	3,043	3,443
Dollars Reinvested	$ 100,791	$ 113,791
F-DTE Shares [Member]
Class of Stock [Line Items]
Shares Reinvested	4,261	5,655
Dollars Reinvested	$ 136,454	$ 180,454
F-ITE Shares [Member]
Class of Stock [Line Items]
Shares Reinvested	711	882
Dollars Reinvested	$ 23,176	$ 28,661
F-JTE Shares [Member]
Class of Stock [Line Items]
Shares Reinvested	6,996	9,079
Dollars Reinvested	$ 227,303	$ 293,926
ETE Shares [Member]
Class of Stock [Line Items]
Shares Reinvested	1	1
Dollars Reinvested	$ 36	$ 36
F-S Shares [Member]
Class of Stock [Line Items]
Shares Reinvested	4,245	5,307
Dollars Reinvested	$ 136,805	$ 168,998
F-I Shares [Member]
Class of Stock [Line Items]
Shares Reinvested	2,227	2,719
Dollars Reinvested	$ 71,889	$ 86,810
F-J Shares [Member]
Class of Stock [Line Items]
Shares Reinvested	31,212	40,480
Dollars Reinvested	$ 1,005,293	$ 1,286,220
E Shares [Member]
Class of Stock [Line Items]
Shares Reinvested	4,284	5,625
Dollars Reinvested	$ 144,585	$ 186,660