Organization	12 Months Ended
Dec. 31, 2025
Disclosure Text Block [Abstract]
Organization	1. Organization EQT Infrastructure Company LLC (“EQIC” and the “Company”) was formed on June 20, 2024 as a limited liability company under the laws of the state of Delaware and the Company operates its business in a manner so that it is not an “investment company” under the Investment Company Act of 1940, as amended. The Company is a holding company that seeks to acquire, own and control portfolio companies with the objective of generating attractive risk-adjusted returns and achieving medium-to-long-term capital appreciation through joint ventures (“Joint Ventures”). EQIC conducts a continuous private offering of its shares in reliance on exemptions from the registration requirements of the Securities Act of 1933, as amended (the “Securities Act”), (i) to accredited investors (as defined in Regulation D under the Securities Act) and (ii) in the case of shares sold outside of the United States, to persons that are not “U.S. persons” (as defined in Regulation S under the Securities Act). The Company is sponsored by EQT AB (together with any one or more of its direct or indirect subsidiaries, “EQT AB Group”) and expects to benefit from EQT AB Group’s institutional real assets platform pursuant to a management agreement to be entered into with EQT Partners Inc. (the “Manager”) to support the Company in identifying, acquiring, owning and controlling its portfolio companies in accordance with the Company’s objectives. The Company had no activity as of December 31, 2025, other than matters relating to its organization and offering. As of December 31, 2025, EQT Holdings AB, an indirect subsidiary of EQT AB, made the Company's only capital contribution of $1,000 in exchange for the issuance of Class Q Shares (the "Shares") of the Company. As of December 31, 2025, the Company had neither purchased nor contracted to purchase any investments.

Organization

12 Months Ended

Dec. 31, 2025

1. Organization

EQT Infrastructure Company LLC (“EQIC” and the “Company”) was formed on June 20, 2024 as a limited liability company under the laws of the state of Delaware and the Company operates its business in a manner so that it is not an “investment company” under the Investment Company Act of 1940, as amended. The Company is a holding company that seeks to acquire, own and control portfolio companies with the objective of generating attractive risk-adjusted returns and achieving medium-to-long-term capital appreciation through joint ventures (“Joint Ventures”).

EQIC conducts a continuous private offering of its shares in reliance on exemptions from the registration requirements of the Securities Act of 1933, as amended (the “Securities Act”), (i) to accredited investors (as defined in Regulation D under the Securities Act) and (ii) in the case of shares sold outside of the United States, to persons that are not “U.S. persons” (as defined in Regulation S under the Securities Act).

The Company is sponsored by EQT AB (together with any one or more of its direct or indirect subsidiaries, “EQT AB Group”) and expects to benefit from EQT AB Group’s institutional real assets platform pursuant to a management agreement to be entered into with EQT Partners Inc. (the “Manager”) to support the Company in identifying, acquiring, owning and controlling its portfolio companies in accordance with the Company’s objectives. The Company had no activity as of December 31, 2025, other than matters relating to its organization and offering.

As of December 31, 2025, EQT Holdings AB, an indirect subsidiary of EQT AB, made the Company's only capital contribution of $1,000 in exchange for the issuance of Class Q Shares (the "Shares") of the Company.

As of December 31, 2025, the Company had neither purchased nor contracted to purchase any investments.