| Cover Page | Dec. 20, 2021 |
| Document Information [Line Items] | |
| Document Type | 8-K |
| Document Period End Date | Dec. 20, 2021 |
| Entity Registrant Name | Cyxtera Technologies, Inc. |
| Entity Incorporation, State or Country Code | DE |
| Entity File Number | 001-39496 |
| Entity Tax Identification Number | 84-3743013 |
| Entity Address, Address Line One | 2333 Ponce de Leon Boulevard |
| Entity Address, Address Line Two | Suite 900 |
| Entity Address, City or Town | Coral Gables |
| Entity Address, State or Province | FL |
| Entity Address, Postal Zip Code | 33134 |
| City Area Code | 305 |
| Local Phone Number | 537-9500 |
| Written Communications | false |
| Soliciting Material | false |
| Pre-commencement Tender Offer | false |
| Pre-commencement Issuer Tender Offer | false |
| Entity Emerging Growth Company | true |
| Entity Ex Transition Period | false |
| Amendment Flag | false |
| Entity Central Index Key | 0001794905 |
| Common Stock [Member] | |
| Document Information [Line Items] | |
| Title of 12(b) Security | Class A common stock, par value $0.0001 pershare |
| Trading Symbol | CYXT |
| Security Exchange Name | NASDAQ |
| Warrant [Member] | |
| Document Information [Line Items] | |
| Title of 12(b) Security | Warrants to purchase one share of Class Acommon stock |
| Trading Symbol | CYXTW |
| Security Exchange Name | NASDAQ |
