Derivative Financial Instruments - Summary of Derivative Cash Flow Hedges (Details) - Designated as Hedging Instrument	12 Months Ended
	Dec. 31, 2021 oz $ / oz
Gold Put Options - 2020
Derivative [Line Items]
Average gold strike price per ounce | $ / oz	1,630
Notional ounces | oz	132,000
Gold Call Options - 2020
Derivative [Line Items]
Average gold strike price per ounce | $ / oz	2,038
Notional ounces | oz	132,000
Gold Put Options - 2021
Derivative [Line Items]
Average gold strike price per ounce | $ / oz	0
Notional ounces | oz	0
Gold Call Options - 2021
Derivative [Line Items]
Average gold strike price per ounce | $ / oz	0
Notional ounces | oz	0