| Document and Entity Information | Aug. 09, 2021 |
| Document And Entity Information [Line Items] | |
| Amendment Flag | false |
| Entity Central Index Key | 0001794905 |
| Document Type | 8-K |
| Document Period End Date | Aug. 9, 2021 |
| Entity Registrant Name | Cyxtera Technologies, Inc. |
| Entity Incorporation State 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 |
| Common Class A [Member] | |
| Document And Entity Information [Line Items] | |
| Security 12b Title | Class A common stock, par value $0.0001 per share |
| Trading Symbol | CYXT |
| Security Exchange Name | NASDAQ |
| Warrant [Member] | |
| Document And Entity Information [Line Items] | |
| Security 12b Title | Warrants to purchase one share of Class A common stock |
| Trading Symbol | CYXTW |
| Security Exchange Name | NASDAQ |
