v3.26.3
Earnings Per Share - Schedule of Reconciliation of Numerator and Denominator (Details) - USD ($)
$ / shares in Units, shares in Thousands, $ in Millions
 3 Months Ended 9 Months Ended
Sep. 30, 2026
Sep. 30, 2025
Sep. 30, 2026
Sep. 30, 2025
Earnings Per Share [Abstract]        
Net earnings attributable to Mirion Technologies, Inc. shareholders $ 7.4 $ 2.9 $ 11.7 $ 11.5
Weighted average common shares outstanding — basic (in shares) 242,390 224,583 243,864 225,084
Effect of potentially dilutive securities — stock-based awards (in shares) 178 758 358 844
Effect of potentially dilutive securities - convertible debt (in shares) 30,321 30,321 30,321 30,321
Weighted average common shares outstanding — diluted (in shares) 272,889 255,662 274,543 256,249
Net earnings per common share attributable to Mirion Technologies, Inc. — basic (in dollars per share) $ 0.03 $ 0.01 $ 0.05 $ 0.05
Net earnings per common share attributable to Mirion Technologies, Inc. — diluted (in dollars per share) $ 0.03 $ 0.01 $ 0.04 $ 0.04