Investment in the Aggregator	9 Months Ended
Sep. 30, 2026
Investment in the Aggregator [Abstract]
Investment in the Aggregator	3. Investment in the Aggregator BXINFRA U.S. recognizes dividend income on the record date of distributions from the Aggregator, if any. BXINFRA U.S. has an interest of 94.9% and 93.1% in the Aggregator as of September 30, 2026 and December 31, 2025, respectively. The remaining interest in the Aggregator is held by a Parallel Fund. BXINFRA U.S.’s interest in the Aggregator may result in BXINFRA U.S. indirectly holding investments of the Aggregator that, on a proportional basis, at times may exceed 5% of the net assets of BXINFRA U.S. For a listing of investments that may proportionally exceed 5% of BXINFRA U.S.’s net assets, see the Condensed Consolidated Schedules of Investments of the Aggregator.

Investment in the Aggregator

9 Months Ended

Sep. 30, 2026

Investment in the Aggregator [Abstract]

3. Investment in the Aggregator

BXINFRA U.S. recognizes dividend income on the record date of distributions from the Aggregator, if any. BXINFRA U.S. has an interest of 94.9% and 93.1% in the Aggregator as of September 30, 2026 and December 31, 2025, respectively. The remaining interest in the Aggregator is held by a Parallel Fund. BXINFRA U.S.’s interest in the Aggregator may result in BXINFRA U.S. indirectly holding investments of the Aggregator that, on a proportional basis, at times may exceed 5% of the net assets of BXINFRA U.S. For a listing of investments that may proportionally exceed 5% of BXINFRA U.S.’s net assets, see the Condensed Consolidated Schedules of Investments of the Aggregator.