| Document and Entity Information | Jan. 18, 2024 |
| Cover [Abstract] | |
| Amendment Flag | false |
| Entity Central Index Key | 0001832433 |
| Document Type | 8-K |
| Document Period End Date | Jan. 18, 2024 |
| Entity Registrant Name | FERGUSON PLC |
| Entity Incorporation State Country Code | Y9 |
| Entity File Number | 001-40066 |
| Entity Tax Identification Number | 98-1499339 |
| Entity Address, Address Line One | 1020 Eskdale Road |
| Entity Address, Address Line Two | Winnersh Triangle |
| Entity Address, Address Line Three | Wokingham |
| Entity Address, City or Town | Berkshire |
| Entity Address, Country | GB |
| Entity Address, Postal Zip Code | RG41 5TS |
| City Area Code | 118 |
| Local Phone Number | 927 3800 |
| Written Communications | true |
| Soliciting Material | false |
| Pre Commencement Tender Offer | false |
| Pre Commencement Issuer Tender Offer | false |
| Security 12b Title | Ordinary Shares of 10 pence |
| Trading Symbol | FERG |
| Security Exchange Name | NYSE |
| Entity Emerging Growth Company | false |
