v3.26.1
Shareholders' Equity - Schedule of Summary of the Shares Issued and Redeemed During the Period (Details) - ISQ Open Infrastructure Company LLC Series II [Member] - shares
 3 Months Ended 6 Months Ended
Jun. 30, 2026
Jun. 30, 2025
Jun. 30, 2025
Jun. 30, 2026
F-STE Shares [Member]        
Schedule of Summary of the Shares Issued and Redeemed During the Period [Line Items]        
Shares Outstanding 503,216 105,792
Shares Issued During the Period 685,213 1,082,237
Shares Redeemed During the Period
Shares Reinvested under DRIP During the Period 3,043 3,443
Transfers In
Transfers Out
Shares Outstanding 1,191,472 1,191,472
F-DTE Shares [Member]        
Schedule of Summary of the Shares Issued and Redeemed During the Period [Line Items]        
Shares Outstanding 401,494 400,100
Shares Issued During the Period
Shares Redeemed During the Period
Shares Reinvested under DRIP During the Period 4,261 5,655
Transfers In
Transfers Out
Shares Outstanding 405,755 405,755
F-ITE Shares [Member]        
Schedule of Summary of the Shares Issued and Redeemed During the Period [Line Items]        
Shares Outstanding 71,385 40,677
Shares Issued During the Period 80,432 110,969
Shares Redeemed During the Period
Shares Reinvested under DRIP During the Period 711 882
Transfers In
Transfers Out
Shares Outstanding 152,528 152,528
F-JTE Shares [Member]        
Schedule of Summary of the Shares Issued and Redeemed During the Period [Line Items]        
Shares Outstanding 698,805 572,307
Shares Issued During the Period 33,180 157,595
Shares Redeemed During the Period
Shares Reinvested under DRIP During the Period 6,996 9,079
Transfers In
Transfers Out
Shares Outstanding 738,981 738,981
STE Shares [Member]        
Schedule of Summary of the Shares Issued and Redeemed During the Period [Line Items]        
Shares Outstanding 100 100
Shares Issued During the Period
Shares Redeemed During the Period
Shares Reinvested under DRIP During the Period
Transfers In
Transfers Out
Shares Outstanding 100 100
DTE Shares [Member]        
Schedule of Summary of the Shares Issued and Redeemed During the Period [Line Items]        
Shares Outstanding 100 100
Shares Issued During the Period
Shares Redeemed During the Period
Shares Reinvested under DRIP During the Period
Transfers In
Transfers Out
Shares Outstanding 100 100
ITE Shares [Member]        
Schedule of Summary of the Shares Issued and Redeemed During the Period [Line Items]        
Shares Outstanding 100 100
Shares Issued During the Period
Shares Redeemed During the Period
Shares Reinvested under DRIP During the Period
Transfers In
Transfers Out
Shares Outstanding 100 100
JTE Shares [Member]        
Schedule of Summary of the Shares Issued and Redeemed During the Period [Line Items]        
Shares Outstanding 100 100
Shares Issued During the Period 86,551 86,551
Shares Redeemed During the Period
Shares Reinvested under DRIP During the Period
Transfers In
Transfers Out
Shares Outstanding 86,651 86,651
ETE Shares [Member]        
Schedule of Summary of the Shares Issued and Redeemed During the Period [Line Items]        
Shares Outstanding 40 40 40
Shares Issued During the Period 40
Shares Redeemed During the Period
Shares Reinvested under DRIP During the Period 1 1
Transfers In
Transfers Out
Shares Outstanding 41 40 40 41
F-S Shares [Member]        
Schedule of Summary of the Shares Issued and Redeemed During the Period [Line Items]        
Shares Outstanding 759,798 448,694
Shares Issued During the Period 1,272,491 1,582,533
Shares Redeemed During the Period
Shares Reinvested under DRIP During the Period 4,245 5,307
Transfers In
Transfers Out
Shares Outstanding 2,036,534 2,036,534
F-I Shares [Member]        
Schedule of Summary of the Shares Issued and Redeemed During the Period [Line Items]        
Shares Outstanding 400,558 207,668
Shares Issued During the Period 431,995 624,393
Shares Redeemed During the Period
Shares Reinvested under DRIP During the Period 2,227 2,719
Transfers In
Transfers Out
Shares Outstanding 834,780 834,780
F-J Shares [Member]        
Schedule of Summary of the Shares Issued and Redeemed During the Period [Line Items]        
Shares Outstanding 3,970,498 2,862,789
Shares Issued During the Period 251,287 1,349,728
Shares Redeemed During the Period
Shares Reinvested under DRIP During the Period 31,212 40,480
Transfers In
Transfers Out
Shares Outstanding 4,252,997 4,252,997
I Shares [Member]        
Schedule of Summary of the Shares Issued and Redeemed During the Period [Line Items]        
Shares Outstanding    
Shares Issued During the Period 13,000     13,000
Shares Redeemed During the Period    
Shares Reinvested under DRIP During the Period    
Transfers In    
Transfers Out    
Shares Outstanding [1] 13,000     13,000
J Shares [Member]        
Schedule of Summary of the Shares Issued and Redeemed During the Period [Line Items]        
Shares Outstanding    
Shares Issued During the Period 187,442     187,442
Shares Redeemed During the Period    
Shares Reinvested under DRIP During the Period    
Transfers In    
Transfers Out    
Shares Outstanding [1] 187,442     187,442
E Shares [Member]        
Schedule of Summary of the Shares Issued and Redeemed During the Period [Line Items]        
Shares Outstanding 453,080 377,933
Shares Issued During the Period 9,056 82,862
Shares Redeemed During the Period
Shares Reinvested under DRIP During the Period 4,284 5,625
Transfers In
Transfers Out
Shares Outstanding 466,420 466,420
[1] Class I shares and Class J shares were first issued on June 1, 2026 and May 1, 2026, respectively. Amounts presented are for the period from issuance date through June 30, 2026. The ratios of expense and net investment income (loss) and the total return for these share classes have not been annualized.