Quarterly report pursuant to Section 13 or 15(d)

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

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Loss Per Share - Reconciliation of Numerator and Denominator (Details) - USD ($)
$ / shares in Units, shares in Thousands, $ in Millions
3 Months Ended 6 Months Ended
Jun. 30, 2024
Jun. 30, 2023
Jun. 30, 2024
Jun. 30, 2023
Earnings Per Share [Abstract]        
Net loss attributable to Mirion Technologies, Inc. shareholders $ (11.7) $ (27.7) $ (37.5) $ (69.6)
Weighted average common shares outstanding — basic (in shares) 202,197 199,181 200,963 193,439
Weighted average common shares outstanding — diluted (in shares) 202,197 199,181 200,963 193,439
Net loss per common share attributable to Mirion Technologies, Inc. — basic (in dollars per share) $ (0.06) $ (0.14) $ (0.19) $ (0.36)
Net loss per common share attributable to Mirion Technologies, Inc. — diluted (in dollars per share) $ (0.06) $ (0.14) $ (0.19) $ (0.36)