Property, Plant and Equipment and Mining Properties, Net (Narrtive) (Details) $ in Millions	3 Months Ended	6 Months Ended
Jun. 30, 2024 ton / d	Jun. 30, 2024 USD ($)
Property, Plant and Equipment [Line Items]
Crushing circuit production (tons per day) \| ton / d	88,000
Rochester
Property, Plant and Equipment [Line Items]
Construction in process placed into service \| $		$ 528

Amount of increase (decrease) of physical assets used in the normal conduct of business and not intended for resale, from reclassification, impairment, donation, or changes classified as other. Examples include, but are not limited to, land, buildings, machinery and equipment, office equipment, and furniture and fixtures.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Name Accounting Standards Codification
-Topic 360
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (a)
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147482099/360-10-50-2

Name:	us-gaap_PropertyPlantAndEquipmentTransfersAndChanges
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration