LEASES: (Tables)

3 Months Ended

Mar. 31, 2024

LEASES:

Schedule of the operating lease expense recognized

Classification	2024		2023
Cost of sales (exclusive of depreciation, amortization and depletion)	$	28.5	$	29.1
Selling, general and administrative		(*)		(*)
Exploration		(*)		(*)
Total lease expense	$	28.5	$	29.1

(*) amount is lower than $0.1 million

Schedule of Maturities of lease liabilities

	Lease liabilities
Year	(in millions)
2024	$	87.3
2025		105.9
2026		105.6
2027		105.2
2028		104.9
After 2028		417.2
Total lease payments	$	926.1
Less: interest on lease liabilities		(169.0)
Present value of lease payments	$	757.1