| Document and Entity Information | Sep. 14, 2023 |
| Cover [Abstract] | |
| Document Type | 8-K |
| Amendment Flag | false |
| Document Period End Date | Sep. 14, 2023 |
| Entity File Number | 001-40470 |
| Entity Registrant Name | GXO Logistics, Inc. |
| Entity Central Index Key | 0001852244 |
| Entity Incorporation, State or Country Code | DE |
| Entity Tax Identification Number | 86-2098312 |
| Entity Address, Address Line One | TWO AMERICAN LANE |
| Entity Address, City or Town | GREENWICH |
| Entity Address, State or Province | CT |
| Entity Address, Postal Zip Code | 06831 |
| City Area Code | 203 |
| Local Phone Number | 489-1287 |
| Title of 12(b) Security | Common stock, $0.01 par value per share |
| Trading Symbol | GXO |
| Security Exchange Name | NYSE |
| Entity Emerging Growth Company | false |
| Written Communications | false |
| Soliciting Material | false |
| Pre-commencement Tender Offer | true |
| Pre-commencement Issuer Tender Offer | false |
