Document and Entity Information
| Document and Entity Information | Sep. 14, 2023 |
| Document And Entity Information [Line Items] | |
| Entity Registrant Name | INTEGRATED RAIL & RESOURCES ACQUISITION CORP |
| Amendment Flag | false |
| Entity Central Index Key | 0001854795 |
| Document Type | 8-K |
| Document Period End Date | Sep. 14, 2023 |
| Entity Incorporation State Country Code | DE |
| Entity File Number | 001-41048 |
| Entity Tax Identification Number | 86-2581754 |
| Entity Address, Address Line One | 400 W. Morse Boulevard |
| Entity Address, Address Line Two | Suite 220 |
| Entity Address, City or Town | Winter Park |
| Entity Address, State or Province | FL |
| Entity Address, Postal Zip Code | 32789 |
| City Area Code | (321) |
| Local Phone Number | 972-1583 |
| Written Communications | false |
| Soliciting Material | false |
| Pre Commencement Tender Offer | false |
| Pre Commencement Issuer Tender Offer | false |
| Entity Emerging Growth Company | true |
| Entity Ex Transition Period | false |
| Units Each Consisting Of One Share Of Class A Common Stock Par Value 0.0001 Per Share And One Half Of One Redeemable Warrant [Member] | |
| Document And Entity Information [Line Items] | |
| Security 12b Title | Units, each consisting of one share of Class A common stock, par value $0.0001 per share, and one-half of one redeemable warrant |
| Trading Symbol | IRRXU |
| Security Exchange Name | NYSE |
| Common Class A [Member] | |
| Document And Entity Information [Line Items] | |
| Security 12b Title | Shares of Class A common stock, par value $0.0001 per share |
| Trading Symbol | IRRX |
| Security Exchange Name | NYSE |
| Redeemable Warrants Each Exercisable For One Share Of Class A Common Stock For 11.50 Per Share [Member] | |
| Document And Entity Information [Line Items] | |
| Security 12b Title | Redeemable Warrants, each exercisable for one share of Class A common stock for $11.50 per share |
| Trading Symbol | IRRXW |
| Security Exchange Name | NYSE |