Income Taxes - Schedule of Aggregators Net Increase in Net Assets Resulting from Operations Before Provision for Taxes (Detail) - BXINFRA Aggregator (CYM) L.P. [Member] - USD ($) $ in Thousands |
5 Months Ended | 12 Months Ended |
|---|---|---|
Dec. 31, 2024 |
Dec. 31, 2025 |
|
| Schedule of Aggregators Net Increase in Net Assets Resulting from Operations Before Provision for Taxes [Line Items] | ||
| Net Increase in Net Assets Resulting from Operations Before Provision for Taxes | $ 0 | $ 328,656 |
| Domestic Tax Jurisdiction [Member] | ||
| Schedule of Aggregators Net Increase in Net Assets Resulting from Operations Before Provision for Taxes [Line Items] | ||
| Net Increase in Net Assets Resulting from Operations Before Provision for Taxes | 0 | 297,919 |
| Foreign Tax Jurisdiction [Member] | ||
| Schedule of Aggregators Net Increase in Net Assets Resulting from Operations Before Provision for Taxes [Line Items] | ||
| Net Increase in Net Assets Resulting from Operations Before Provision for Taxes | $ 0 | $ 30,737 |