Property, Plant, Equipment and Mine Development - Narrative (Details)	Mar. 31, 2022 USD ($)
Impaired Long-Lived Assets Held and Used [Line Items]
At-risk assets	$ 500,000,000
Other US Mining Operations
Impaired Long-Lived Assets Held and Used [Line Items]
At-risk assets	$ 0

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.

No definition available.

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration