Condensed Consolidated Statements of Comprehensive Loss - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023
Statement of Comprehensive Income [Abstract]
Net loss	$ (26.5)	$ (42.9)
Foreign currency translation (loss) gain, net of tax	(14.7)	10.6
Unrealized gain (loss) on net investment hedges, net of tax	4.9	(2.3)
Unrealized gain on cash flow hedge, net of tax	0.6	0.0
Other comprehensive (loss) income, net of tax	(9.2)	8.3
Comprehensive loss	(35.7)	(34.6)
Less: Comprehensive loss attributable to noncontrolling interest	(1.0)	(0.7)
Comprehensive loss attributable to Mirion Technologies, Inc.	$ (34.7)	$ (33.9)