| Cover | Nov. 13, 2024 |
| Document Type | 8-K |
| Amendment Flag | false |
| Document Period End Date | Nov. 13, 2024 |
| Current Fiscal Year End Date | --12-31 |
| Entity File Number | 001-41048 |
| Entity Registrant Name | INTEGRATED RAIL AND RESOURCES ACQUISITION CORP. |
| Entity Central Index Key | 0001854795 |
| Entity Tax Identification Number | 86-2581754 |
| Entity Incorporation, State or Country Code | DE |
| 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 | true |
| Soliciting Material | false |
| Pre-commencement Tender Offer | false |
| Pre-commencement Issuer Tender Offer | false |
| Entity Emerging Growth Company | true |
| Elected Not To Use the Extended 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 | |
| Title of 12(b) Security | 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 | OTC Pink: IRRXU |
| Class A common stock, par value $0.0001 | |
| Title of 12(b) Security | Class A common stock, par value $0.0001 |
| Trading Symbol | OTC Pink: IRRX |
| Warrants | |
| Title of 12(b) Security | Warrants |
| Trading Symbol | OTC Pink: IRRXW |
