Long-Term Debt - Schedule of Long Term Debt (Details) € in Millions, $ in Millions	Jun. 30, 2024 USD ($)	Dec. 31, 2023 USD ($)	Dec. 31, 2019 USD ($)	Dec. 31, 2019 EUR (€)
Debt Instrument [Line Items]
Total debt	$ 396.1	$ 400.3
Finance lease liabilities	2.0	1.9
Long-term debt	393.5	397.8
Less: current portion of long-term debt	(1.6)	(1.6)
Less: current portion of finance lease liabilities	(1.0)	(0.9)
Dollar Denominated Line of Credit | First Lien Term Facility
Debt Instrument [Line Items]
Total debt	250.0	250.0	$ 378.2
Dollar Denominated Line of Credit | First Lien Term Facility exit fees payable
Debt Instrument [Line Items]
Total debt	2.5	2.5
First Lien Euro Term Facility | First Lien Term Facility
Debt Instrument [Line Items]
Total debt	142.8	148.8		€ 140.0
First Lien Euro Term Facility | First Lien Term Facility exit fees payable
Debt Instrument [Line Items]
Total debt	1.5	1.5
Equipment financing
Debt Instrument [Line Items]
Long-term debt	2.9	2.7
Line of Credit | Revolving Credit Facility
Debt Instrument [Line Items]
Deferred financing costs, net	$ (5.6)	$ (7.1)