Financing Arrangements - Narrative (Details) - USD ($)	12 Months Ended
	Dec. 31, 2017	Sep. 30, 2022	Dec. 31, 2021	Dec. 31, 2018	Dec. 31, 2015
Line of Credit Facility [Line Items]
Percentage ownership	100.00%
Finance lease agreement, amount					$ 50,000,000
Finance lease obligations		$ 13,000,000.0	$ 17,500,000
Southwest Steel Processing LLC | Arkansas Development Finance Authority
Line of Credit Facility [Line Items]
Maximum borrowing capacity					$ 11,000,000
Borrowings outstanding		$ 4,700,000
Senior Notes Due 2027 | Senior Notes
Line of Credit Facility [Line Items]
Aggregate principal amount	$ 350,000,000
Stated interest rate	6.625%
Revolving credit facility
Line of Credit Facility [Line Items]
Stated interest rate		3.80%
Revolving credit facility | Seventh Amended and Restated Credit Agreement
Line of Credit Facility [Line Items]
Maximum borrowing capacity				$ 405,000,000
Increase in additional borrowing capacity				70,000,000
Line of credit facility, remaining borrowing capacity		$ 78,800,000
Bank guarantees and letters of credit outstanding		$ 44,400,000	$ 39,700,000
Revolving Credit Facility Canadian Sub-Limit | Seventh Amended and Restated Credit Agreement
Line of Credit Facility [Line Items]
Maximum borrowing capacity				40,000,000
Revolving Credit Facility European Sub-Limit | Seventh Amended and Restated Credit Agreement
Line of Credit Facility [Line Items]
Maximum borrowing capacity				$ 30,000,000