Shareholders' Equity - Schedule of Shares Issued and Redeemed (Details) - ISQ Open Infrastructure Company LLC - Series II [Member]	9 Months Ended
	Dec. 31, 2025 shares
ETE Shares [Member]
Shareholders' Equity - Schedule of Shares Issued and Redeemed (Details) [Line Items]
Shares Outstanding at Formation
Shares Issued During the Period	40
Shares Redeemed During the Period
Shares Reinvested under DRIP During the Period
Transfers In
Transfers Out
Shares Outstanding	40
DTE Shares [Member]
Shareholders' Equity - Schedule of Shares Issued and Redeemed (Details) [Line Items]
Shares Outstanding at Formation
Shares Issued During the Period	100
Shares Redeemed During the Period
Shares Reinvested under DRIP During the Period
Transfers In
Transfers Out
Shares Outstanding	100
ITE Shares [Member]
Shareholders' Equity - Schedule of Shares Issued and Redeemed (Details) [Line Items]
Shares Outstanding at Formation
Shares Issued During the Period	100
Shares Redeemed During the Period
Shares Reinvested under DRIP During the Period
Transfers In
Transfers Out
Shares Outstanding	100
JTE Shares [Member]
Shareholders' Equity - Schedule of Shares Issued and Redeemed (Details) [Line Items]
Shares Outstanding at Formation
Shares Issued During the Period	100
Shares Redeemed During the Period
Shares Reinvested under DRIP During the Period
Transfers In
Transfers Out
Shares Outstanding	100
STE Shares [Member]
Shareholders' Equity - Schedule of Shares Issued and Redeemed (Details) [Line Items]
Shares Outstanding at Formation
Shares Issued During the Period	100
Shares Redeemed During the Period
Shares Reinvested under DRIP During the Period
Transfers In
Transfers Out
Shares Outstanding	100
F-STE Shares [Member]
Shareholders' Equity - Schedule of Shares Issued and Redeemed (Details) [Line Items]
Shares Outstanding at Formation
Shares Issued During the Period	105,792
Shares Redeemed During the Period
Shares Reinvested under DRIP During the Period
Transfers In
Transfers Out
Shares Outstanding	105,792
F-ITE Shares [Member]
Shareholders' Equity - Schedule of Shares Issued and Redeemed (Details) [Line Items]
Shares Outstanding at Formation
Shares Issued During the Period	40,677
Shares Redeemed During the Period
Shares Reinvested under DRIP During the Period
Transfers In
Transfers Out
Shares Outstanding	40,677
F-JTE Shares [Member]
Shareholders' Equity - Schedule of Shares Issued and Redeemed (Details) [Line Items]
Shares Outstanding at Formation
Shares Issued During the Period	572,307
Shares Redeemed During the Period
Shares Reinvested under DRIP During the Period
Transfers In
Transfers Out
Shares Outstanding	572,307
F-DTE Shares [Member]
Shareholders' Equity - Schedule of Shares Issued and Redeemed (Details) [Line Items]
Shares Outstanding at Formation
Shares Issued During the Period	400,100
Shares Redeemed During the Period
Shares Reinvested under DRIP During the Period
Transfers In
Transfers Out
Shares Outstanding	400,100
E Shares [Member]
Shareholders' Equity - Schedule of Shares Issued and Redeemed (Details) [Line Items]
Shares Outstanding at Formation
Shares Issued During the Period	377,933
Shares Redeemed During the Period
Shares Reinvested under DRIP During the Period
Transfers In
Transfers Out
Shares Outstanding	377,933
F-S Shares [Member]
Shareholders' Equity - Schedule of Shares Issued and Redeemed (Details) [Line Items]
Shares Outstanding at Formation
Shares Issued During the Period	448,694
Shares Redeemed During the Period
Shares Reinvested under DRIP During the Period
Transfers In
Transfers Out
Shares Outstanding	448,694
F-I Shares [Member]
Shareholders' Equity - Schedule of Shares Issued and Redeemed (Details) [Line Items]
Shares Outstanding at Formation
Shares Issued During the Period	207,668
Shares Redeemed During the Period
Shares Reinvested under DRIP During the Period
Transfers In
Transfers Out
Shares Outstanding	207,668
F-J Shares [Member]
Shareholders' Equity - Schedule of Shares Issued and Redeemed (Details) [Line Items]
Shares Outstanding at Formation
Shares Issued During the Period	2,862,789
Shares Redeemed During the Period
Shares Reinvested under DRIP During the Period
Transfers In
Transfers Out
Shares Outstanding	2,862,789