Consolidated Statements of Operations - USD ($) shares in Thousands, $ in Millions	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Revenues:
Total revenues	$ 860.8	$ 800.9	$ 717.8
Cost of revenues:
Total cost of revenues	461.1	444.5	407.7
Gross profit	399.7	356.4	310.1
Operating expenses:
Selling, general and administrative	341.1	340.1	362.3
Research and development	35.0	31.7	30.3
Goodwill impairment	0.0	0.0	211.8
Impairment loss on business held for sale	0.0	0.0	3.5
(Gain) loss on disposal of business	(1.2)	6.5	0.0
Total operating expenses	374.9	378.3	607.9
(Loss) income from operations	24.8	(21.9)	(297.8)
Other expense (income):
Third-party interest income	(6.6)	(4.8)	(0.6)
Loss on debt extinguishment	0.0	2.6	0.0
Foreign currency loss (gain), net	2.2	(0.3)	4.9
Increase (decrease) in fair value of warrant liabilities	5.3	24.8	(37.6)
Other income, net	(0.1)	(0.8)	(0.4)
Loss before income taxes	(33.9)	(105.3)	(306.6)
Loss (benefit) from income taxes	2.7	(6.6)	(18.2)
Net loss	(36.6)	(98.7)	(288.4)
Loss attributable to noncontrolling interests	(0.5)	(1.8)	(11.5)
Net loss attributable to Mirion Technologies, Inc. stockholders	$ (36.1)	$ (96.9)	$ (276.9)
Net loss per common share attributable to Mirion Technologies, Inc. stockholders — basic (in dollars per share)	$ (0.18)	$ (0.49)	$ (1.53)
Net loss per common share attributable to Mirion Technologies, Inc. stockholders — diluted (in dollars per share)	$ (0.18)	$ (0.49)	$ (1.53)
Weighted average common shares outstanding — basic (in shares)	204,991	196,369	181,149
Weighted average common shares outstanding — diluted (in shares)	204,991	196,369	181,149
Nonrelated Party
Other expense (income):
Third-party interest expense	$ 57.9	$ 61.9	$ 42.5
Product
Revenues:
Total revenues	643.1	597.8	533.0
Cost of revenues:
Total cost of revenues	348.7	339.7	307.5
Service
Revenues:
Total revenues	217.7	203.1	184.8
Cost of revenues:
Total cost of revenues	$ 112.4	$ 104.8	$ 100.2