Mirion Technologies, Inc. Quarterly report pursuant to Section 13 or 15(d)

Quarterly report pursuant to Section 13 or 15(d)

Borrowings - Narrative (Details)

Borrowings - Narrative (Details) € in Millions, $ in Millions	3 Months Ended			12 Months Ended
	Mar. 31, 2023 USD ($)	Mar. 31, 2023 EUR (€)	Mar. 31, 2022 USD ($)	Dec. 31, 2022 USD ($)	Dec. 31, 2022 EUR (€)	Mar. 31, 2023 EUR (€)	Dec. 31, 2022 EUR (€)	May 31, 2019 USD ($)	May 31, 2019 CAD ($)
Debt Instrument [Line Items]
Fair market value of credit agreement	$ 682,800,000			$ 803,200,000
Repayments of term loan	125,000,000
Amortization expense	3,500,000		$ 1,000,000
Loss on debt extinguishment	2,600,000		$ 0
Debt instrument, overdraft facilities amount	0			0
Accounts receivable, held-for-sale	13,100,000			13,000,000		€ 12.1	€ 12.1
Other short-term borrowings	0			100,000
Letter of Credit
Debt Instrument [Line Items]
Line of credit facility, current borrowing capacity	67,200,000			68,100,000		€ 61.7	€ 63.6
Proceeds from lines of credit	45,700,000	€ 42.0		46,300,000	€ 43.3
Restricted cash	$ 1,800,000			1,500,000
Letter of Credit \| Minimum
Debt Instrument [Line Items]
Interest rate	0.50%					0.50%
Letter of Credit \| Maximum
Debt Instrument [Line Items]
Interest rate	2.00%					2.00%
2021 Credit Agreement \| Secured Debt
Debt Instrument [Line Items]
Loan amount	$ 830,000,000
2021 Credit Agreement \| Revolving Credit Facility
Debt Instrument [Line Items]
Loan amount	$ 90,000,000
Line of credit facility, unused capacity, commitment fee percentage	0.50%	0.50%
Line of credit facility, stepdowns, commitment fee percentage	0.375%	0.375%
Line of credit facility, commitment fee percentage	0.25%	0.25%
Leverage ratio	7.00	7.00
Revolving credit facility of exceed revolving credit commitment, percentage	40.00%	40.00%
Loan term	5 years					5 years
Maximum borrowing capacity	$ 79,200,000			80,600,000
Debt issuance costs	$ 1,800,000
2021 Credit Agreement \| Revolving Credit Facility \| Maximum \| London Interbank Offered Rate (LIBOR)
Debt Instrument [Line Items]
Debt instrument, basis spread on variable rate	2.75%	2.75%
2021 Credit Agreement \| Term Loan Facility
Debt Instrument [Line Items]
Loan term	7 years					7 years
Debt instrument, quarterly repayment, percentage	0.25%					0.25%
Repayments of term loan				6,600,000
Term loan, amount outstanding	$ 696,700,000			$ 821,700,000
Debt issuance costs	$ 21,700,000
2021 Credit Agreement \| Term Loan Facility \| Adjusted LIBOR
Debt Instrument [Line Items]
Interest rate	7.48%			7.48%		7.48%	7.48%
2021 Credit Agreement \| Term Loan Facility \| Minimum \| London Interbank Offered Rate (LIBOR)
Debt Instrument [Line Items]
Debt instrument, basis spread on variable rate	0.50%	0.50%
2021 Credit Agreement \| Term Loan Facility \| Maximum \| London Interbank Offered Rate (LIBOR)
Debt Instrument [Line Items]
Debt instrument, basis spread on variable rate	2.75%	2.75%
2021 Credit Agreement \| Letter of Credit
Debt Instrument [Line Items]
Maximum borrowing capacity	$ 10,800,000			$ 9,400,000
2019 Credit Facility \| Canadian Financial Institution
Debt Instrument [Line Items]
Loan amount								$ 1,300,000	$ 1.7
Interest rate								4.69%	4.69%