Quarterly report pursuant to Section 13 or 15(d)

Loss Per Share - Reconciliation of Numerator and Denominator (Details)

v3.23.3
Loss Per Share - Reconciliation of Numerator and Denominator (Details) - USD ($)
$ / shares in Units, shares in Thousands, $ in Millions
 3 Months Ended 9 Months Ended
Sep. 30, 2023
Sep. 30, 2022
Sep. 30, 2023
Sep. 30, 2022
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Net loss attributable to Mirion Technologies, Inc. shareholders $ (12.1) $ (47.1) $ (81.7) $ (123.4)
Weighted average common shares outstanding — basic (in shares) 199,223 181,333 195,388 181,058
Weighted average common shares outstanding — diluted (in shares) 199,223 181,333 195,388 181,058
Net loss per common share attributable to Mirion Technologies, Inc. — basic (in dollars per share) $ (0.06) $ (0.26) $ (0.42) $ (0.68)
Net loss per common share attributable to Mirion Technologies, Inc. — diluted (in dollars per share) $ (0.06) $ (0.26) $ (0.42) $ (0.68)
Share-based awards        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Anti-dilutive employee share-based awards, excluded 644 1,735 650 939