LEASES: (Tables)

6 Months Ended

Jun. 30, 2025

LEASES:

Schedule of the operating lease expense recognized

The operating lease expense recognized in the six-month periods ended June 30, 2025 and 2024 was classified as follows (in millions):

Classification	2025		2024
Cost of sales (exclusive of depreciation, amortization and depletion)	$	57.6	$	48.7
Selling, general and administrative		(*)		(*)
Exploration		0.1		0.1
Total lease expense	$	57.7	$	48.8

(*) amount is lower than $0.1 million.

Schedule of Maturities of lease liabilities

	Lease liabilities
Year	(in millions)
2025	$	57.7
2026		115.1
2027		114.6
2028		114.0
2029		112.9
After 2029		317.3
Total lease payments	$	831.5
Less: interest on lease liabilities		(130.9)
Present value of lease payments	$	700.7