| Cover | Feb. 14, 2023 |
| Entity Information [Line Items] | |
| Document Type | 8-K |
| Document Period End Date | Feb. 14, 2023 |
| Entity Registrant Name | Mirion Technologies, Inc. |
| Entity Incorporation, State or Country Code | DE |
| Entity File Number | 001-39352 |
| Entity Tax Identification Number | 83-0974996 |
| Entity Address, Address Line One | 1218 Menlo Drive |
| Entity Address, City or Town | Atlanta |
| Entity Address, State or Province | GA |
| Entity Address, Postal Zip Code | 30318 |
| City Area Code | 770 |
| Local Phone Number | 432-2744 |
| Written Communications | false |
| Soliciting Material | false |
| Pre-commencement Tender Offer | false |
| Pre-commencement Issuer Tender Offer | false |
| Entity Emerging Growth Company | false |
| Amendment Flag | false |
| Entity Central Index Key | 0001809987 |
| Common Class A | |
| Entity Information [Line Items] | |
| Title of 12(b) Security | Class A common stock, $0.0001 par value per share |
| Trading Symbol | MIR |
| Security Exchange Name | NYSE |
| Warrant | |
| Entity Information [Line Items] | |
| Title of 12(b) Security | Redeemable warrants to purchase Class A common stock |
| Trading Symbol | MIR WS |
| Security Exchange Name | NYSE |
