| Document and Entity Information | Oct. 29, 2021 |
| Cover [Abstract] | |
| Amendment Flag | false |
| Entity Central Index Key | 0001628369 |
| Document Type | 8-K |
| Document Period End Date | Oct. 29, 2021 |
| Entity Registrant Name | Cushman & Wakefield plc |
| Entity Incorporation State Country Code | X0 |
| Entity File Number | 001-38611 |
| Entity Tax Identification Number | 98-1193584 |
| Entity Address, Address Line One | 125 Old Broad Street |
| Entity Address, City or Town | London |
| Entity Address, Country | GB |
| Entity Address, Postal Zip Code | EC2N 1AR |
| City Area Code | +44 |
| Local Phone Number | 20 3296 3000 |
| Written Communications | false |
| Soliciting Material | false |
| Pre Commencement Tender Offer | false |
| Pre Commencement Issuer Tender Offer | false |
| Security 12b Title | Ordinary shares, $0.10 nominal value |
| Trading Symbol | CWK |
| Security Exchange Name | NYSE |
| Entity Emerging Growth Company | false |
