FINANCING: (Tables)

12 Months Ended

Dec. 31, 2024

FINANCING:

Schedule of long-term debt

Long-term debt (in millions):

							Carrying
							value as of
	Face		Issuance		Issuance		December 31,
	amount		discount		costs		2024
3.875% Senior unsecured notes due 2025	$	500	$	(0.1)	$	(0.1)	$	499.8
9.250% Yankee bonds due 2028		51.2		—		—		51.2
7.500% Senior unsecured notes due 2035		1,000		(9.9)		(6.6)		983.5
6.750% Senior unsecured notes due 2040		1,100		(6.1)		(4.9)		1,089.0
5.250% Senior unsecured notes due 2042		1,200		(16.6)		(5.5)		1,177.9
5.875% Senior unsecured notes due 2045		1,500		(14.7)		(7.8)		1,477.5
4.500% Minera Mexico Senior unsecured notes due 2050		1,000		(11.6)		(9.0)		979.4
Total	$	6,351.2	$	(59.0)	$	(33.9)		6,258.3
Less, current portion								(499.8)
Total long-term debt							$	5,758.5

							Carrying
							value as of
	Face		Issuance		Issuance		December 31,
	amount		discount		costs		2023
3.875% Senior unsecured notes due 2025	$	500	$	(0.4)	$	(0.4)	$	499.2
9.250% Yankee bonds due 2028		51.2		—		—		51.2
7.500% Senior unsecured notes due 2035		1,000		(10.5)		(7.0)		982.5
6.750% Senior unsecured notes due 2040		1,100		(6.3)		(5.1)		1,088.6
5.250% Senior unsecured notes due 2042		1,200		(17.1)		(5.7)		1,177.2
5.875% Senior unsecured notes due 2045		1,500		(15.1)		(8.0)		1,476.9
4.500% Minera Mexico Senior unsecured notes due 2050		1,000		(11.8)		(9.2)		979.0
Total	$	6,351.2	$	(61.2)	$	(35.4)		6,254.6
Less, current portion								—
Total long-term debt							$	6,254.6

Schedule of aggregate maturities of the outstanding borrowings

	Principal
Years	Due(*)
	(in millions)
2025	$	500.0
2026		—
2027		—
2028		51.2
2029		—
Thereafter		5,800.0
Total	$	6,351.2

(*)Total debt maturities do not include the debt discount valuation account of $92.9 million.