| Cover | Jan. 15, 2025 |
| Cover [Abstract] | |
| Document Type | 8-K |
| Amendment Flag | false |
| Document Period End Date | Jan. 15, 2025 |
| Entity File Number | 001-38063 |
| Entity Registrant Name | QXO, INC. |
| Entity Central Index Key | 0001236275 |
| Entity Tax Identification Number | 16-1633636 |
| Entity Incorporation, State or Country Code | DE |
| Entity Address, Address Line One | Five American Lane |
| Entity Address, City or Town | Greenwich |
| Entity Address, State or Province | CT |
| Entity Address, Postal Zip Code | 06831 |
| City Area Code | 888 |
| Local Phone Number | 998-6000 |
| Written Communications | false |
| Soliciting Material | true |
| Pre-commencement Tender Offer | false |
| Pre-commencement Issuer Tender Offer | false |
| Title of 12(b) Security | Common stock, par value $0.00001 per share |
| Trading Symbol | QXO |
| Security Exchange Name | NASDAQ |
| Entity Emerging Growth Company | false |
