Debt and Other Obligations - Local bank loans and other short term borrowings (Details) € in Millions, $ in Millions	Jun. 30, 2023 USD ($)	Dec. 31, 2022 USD ($)	Dec. 31, 2022 EUR (€)
Debt Instrument [Line Items]
Repurchase agreement	$ 0.0	$ 36.3
Total of Other short-term debt and obligations	186.7	256.0
Total ancillary capacity - U.S. $
Debt Instrument [Line Items]
Total ancillary capacity - U.S. $ | €			€ 268.3
Total ancillary capacity - U.S. $ | OEC GmbH outstanding borrowings
Debt Instrument [Line Items]
Outstanding	132.9	148.7
Total ancillary capacity - U.S. $ | OEC LLC outstanding borrowings
Debt Instrument [Line Items]
Outstanding	9.2	5.4
Uncommitted local lines of credit: | Korea
Debt Instrument [Line Items]
Total ancillary capacity - U.S. $	39.7
Outstanding	1.9	0.0
Uncommitted local lines of credit: | Brazil
Debt Instrument [Line Items]
Total ancillary capacity - U.S. $	3.3
Outstanding	0.0	2.9
China working capital
Debt Instrument [Line Items]
Outstanding	4.1	1.5
Korea working capital loan
Debt Instrument [Line Items]
Outstanding	$ 11.4	$ 7.9