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Business Segments - Major Customers (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Glencore
Revenue, Major Customer [Line Items]
Revenues	$ 1,671.1	$ 1,337.0	$ 1,025.5
Southwire
Revenue, Major Customer [Line Items]
Revenues	$ 331.3	$ 304.6	$ 195.9

X

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Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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- Definition

Amount of revenue recognized from goods sold, services rendered, insurance premiums, or other activities that constitute an earning process. Includes, but is not limited to, investment and interest income before deduction of interest expense when recognized as a component of revenue, and sales and trading gain (loss).

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