SEGMENT AND RELATED INFORMATION: (Tables)

12 Months Ended

Dec. 31, 2024

SEGMENT AND RELATED INFORMATION:

Schedule of financial information relating to Company's segments

	Year Ended December 31, 2024
	(in millions)
			Mexican						Corporate, other
	Mexican		IMMSA		Peruvian		Segment		and
	Open-pit		Unit		Operations		Total		eliminations		Consolidated
Net sales to external customers	$	6,305.1	$	523.6	$	4,604.6	$	11,433.4	$	—	$	11,433.4
Intersegment sales		11.9		180.5		—		192.4		(192.4)		(0.0)
Cost of sales (exclusive of depreciation, amortization and depletion)		2,447.5		479.1		2,111.4		5,038.0		(196.5)		4,841.4
Selling, general and administrative		70.9		12.4		38.1		121.4		9.1		130.5
Depreciation, amortization and depletion		405.8		72.9		329.5		808.2		37.7		845.9
Exploration		8.7		10.5		33.2		52.4		8.5		60.9
Operating income	$	3,384.1	$	129.2	$	2,092.5	$	5,605.8	$	(51.1)		5,554.7
Less:
Interest, net												(202.7)
Other income (expense)												5.5
Income before income taxes											$	5,357.4
Capital investment	$	621.9	$	122.6	$	271.2	$	1,015.8	$	11.5	$	1,027.3
Property and mine development, net	$	4,735.4	$	801.0	$	3,759.7	$	9,296.1	$	587.2	$	9,883.3
Total assets	$	8,605.1	$	1,204.5	$	5,278.3	$	15,087.9	$	3,625.6	$	18,713.5

	Year Ended December 31, 2023
	(in millions)
			Mexican						Corporate, other
	Mexican		IMMSA		Peruvian		Segment		and
	Open-pit		Unit		Operations		Total		eliminations		Consolidated
Net sales to external customers	$	5,562.3	$	479.2	$	3,854.3	$	9,895.8	$	—	$	9,895.8
Intersegment sales		—		151.6		—		151.6		(151.6)		—
Cost of sales (exclusive of depreciation, amortization and depletion)		2,325.1		545.6		1,974.7		4,845.4		(157.7)		4,687.7
Selling, general and administrative		70.1		10.4		38.4		118.9		8.3		127.2
Depreciation, amortization and depletion		386.1		70.4		338.7		795.2		38.4		833.6
Exploration		6.2		8.6		29.1		43.9		11.1		55.0
Operating income	$	2,774.8	$	(4.2)	$	1,473.4	$	4,244.0	$	(51.7)		4,192.3
Less:
Interest, net												(240.1)
Other income (expense)												3.6
Income before income taxes											$	3,955.8
Capital investment	$	521.8	$	147.7	$	322.7	$	992.2	$	16.4	$	1,008.6
Property and mine development, net	$	4,590.1	$	751.0	$	3,624.2	$	8,965.3	$	817.6	$	9,782.9
Total assets	$	8,695.6	$	1,166.1	$	4,635.5	$	14,497.2	$	2,228.1	$	16,725.3

	Year Ended December 31, 2022
	(in millions)
			Mexican						Corporate, other
	Mexican		IMMSA		Peruvian		Segment		and
	Open-pit		Unit		Operations		Total		eliminations		Consolidated
Net sales to external customers	$	5,610.9	$	528.5	$	3,908.5	$	10,047.9	$	—	$	10,047.9
Intersegment sales		161.7		138.0		—		299.7		(299.7)		—
Cost of sales (exclusive of depreciation, amortization and depletion)		2,371.9		532.8		2,061.3		4,966.0		(316.9)		4,649.1
Selling, general and administrative		65.9		10.2		39.2		115.3		9.7		125.0
Depreciation, amortization and depletion		377.0		57.6		321.7		756.3		40.0		796.3
Exploration		3.1		5.4		18.5		27.0		14.7		41.7
Operating income	$	2,954.7	$	60.6	$	1,467.8	$	4,483.1	$	(47.3)		4,435.8
Less:
Interest, net												(305.1)
Other income (expense)												117.1
Income before income taxes											$	4,247.8
Capital investment	$	422.7	$	161.8	$	355.0	$	939.5	$	9.0	$	948.5
Property and mine development, net	$	4,512.6	$	678.5	$	3,659.3	$	8,850.4	$	746.2	$	9,596.6
Total assets	$	8,835.9	$	1,100.7	$	4,870.8	$	14,807.4	$	2,470.0	$	17,277.4

Schedule of opening and closing balances of receivables by reporting segment

The following table presents information regarding the opening and closing balances of receivables by reporting segment of the Company for the two years ended December 31, 2024 (in millions):

			Mexican
	Mexican		IMMSA		Peruvian		Segment		Corporate &
	Open-Pit		Unit		Operations		Total		Elimination		Consolidated
As of December 31, 2024:
Trade receivables	$	623.0	$	59.7	$	506.9	$	1,189.6	$	—	$	1,189.6
Related parties, current		39.7		25.1		1.3		66.2		(52.7)		13.5
As of December 31, 2023:
Trade receivables	$	556.3	$	49.1	$	535.7	$	1,141.1	$	—	$	1,141.1
Related parties, current		25.7		0.9		0.8		27.4		(0.1)		27.3

Schedule of sales value per segment

The following table presents information regarding the sales value by reporting segment of the Company’s significant products for the three years ended December 31, 2024 (in millions):

	Year Ended December 31, 2024
			Mexican
	Mexican		IMMSA		Peruvian		Segment		Corporate, Other &		Total
(in millions)	Open-pit		Unit		Operations		Total		Eliminations		Consolidated
Copper	$	4,981.1	$	127.7	$	3,726.2	$	8,835.1	$	(81.4)	$	8,753.7
Molybdenum		674.5		—		571.9		1,246.4		—		1,246.4
Zinc		137.3		306.2		—		443.6		(8.7)		434.9
Silver		342.6		191.2		151.1		684.9		(96.9)		588.0
Other		181.5		78.9		155.4		415.8		(5.4)		410.4
Total	$	6,317.0	$	704.1	$	4,604.6	$	11,625.8	$	(192.4)	$	11,433.4

	Year Ended December 31, 2023
			Mexican
	Mexican		IMMSA		Peruvian		Segment		Corporate, Other &		Total
(in millions)	Open-pit		Unit		Operations		Total		Eliminations		Consolidated
Copper	$	4,442.2	$	89.1	$	3,129.1	$	7,660.4	$	(69.3)	$	7,591.1
Molybdenum		689.4		—		440.3		1,129.7		—		1,129.7
Zinc		—		300.9		—		300.9		0.5		301.4
Silver		233.7		158.3		100.2		492.2		(74.6)		417.6
Other		197.0		82.5		184.7		464.2		(8.2)		456.0
Total	$	5,562.3	$	630.8	$	3,854.3	$	10,047.4	$	(151.6)	$	9,895.8

	Year Ended December 31, 2022
			Mexican
	Mexican		IMMSA		Peruvian		Segment		Corporate, Other &		Total
(in millions)	Open-pit		Unit		Operations		Total		Eliminations		Consolidated
Copper	$	4,579.2	$	83.6	$	3,096.0	$	7,758.8	$	(220.0)	$	7,538.8
Molybdenum		705.3		—		487.4		1,192.7		—		1,192.7
Zinc		—		373.8		—		373.8		0.4		374.2
Silver		241.9		133.8		95.3		471.0		(68.4)		402.6
Other		246.3		75.3		229.8		551.4		(11.7)		539.7
Total	$	5,772.6	$	666.5	$	3,908.5	$	10,347.6	$	(299.7)	$	10,047.9

Schedule of net sales by countries

The geographic breakdown of the Company’s sales for the three years ended December 31, 2024, is attributed to countries based on location of customer, and is summarized as follows (in millions):

	Year Ended December 31, 2024
			Mexican
	Mexican		IMMSA		Peruvian		Segment		Corporate &
	Open-Pit		Unit		Operations		Total		Elimination		Consolidated
The Americas:
Mexico	$	2,481.5	$	503.0	$	33.9	$	3,018.4	$	(163.5)	$	2,854.9
United States		1,129.9		2.4		339.1		1,471.4		—		1,471.4
Peru		—		28.6		661.6		690.2		(28.9)		661.4
Brazil		—		39.4		474.1		513.5		—		513.5
Chile		—		—		452.3		452.3		—		452.3
Other American countries		43.1		—		27.1		70.2		—		70.2
Europe:
Switzerland		735.2		92.5		613.0		1,440.7		—		1,440.7
Italy		—		24.9		344.2		369.0		—		369.0
Spain		461.0		—		88.1		549.1		—		549.1
Other European countries		163.9		10.4		552.0		726.3		—		726.3
Asia:
China		921.8		3.5		257.8		1,183.1		—		1,183.1
Singapore		104.4		(0.6)		151.9		255.7		—		255.7
Japan		185.1		—		541.1		726.2		—		726.2
Other Asian countries		91.1		—		68.6		159.7		—		159.7
Total	$	6,317.0	$	704.1	$	4,604.6	$	11,625.8	$	(192.4)	$	11,433.4

	Year Ended December 31, 2023
			Mexican
	Mexican		IMMSA		Peruvian		Segment		Corporate &
	Open-Pit		Unit		Operations		Total		Elimination		Consolidated
The Americas:
Mexico	$	2,329.3	$	475.3	$	—	$	2,804.6	$	(133.5)	$	2,671.1
United States		1,086.6		18.3		515.4		1,620.3		—		1,620.3
Peru		—		18.4		394.6		413.0		(18.1)		394.9
Brazil		—		34.5		355.8		390.3		—		390.3
Chile		(8.4)		—		407.9		399.5		—		399.5
Other American countries		39.3		0.5		20.7		60.5		—		60.5
Europe:
Switzerland		520.2		29.8		535.4		1,085.4		—		1,085.4
Italy		1.1		18.9		394.4		414.4		—		414.4
Spain		397.0		—		75.9		472.9		—		472.9
Other European countries		163.5		24.4		219.8		407.7		—		407.7
Asia:
China		631.7		2		115.2		749.2		—		749.2
Singapore		155.5		8.1		200.7		364.3		—		364.3
Japan		160.3		—		508.0		668.3		—		668.3
Other Asian countries		86.2		0.3		110.5		197.0		—		197.0
Total	$	5,562.3	$	630.8	$	3,854.3	$	10,047.4	$	(151.6)	$	9,895.8

	Year Ended December 31, 2022
			Mexican
	Mexican		IMMSA		Peruvian		Segment		Corporate &
	Open-Pit		Unit		Operations		Total		Elimination		Consolidated
The Americas:
Mexico	$	1,962.0	$	464.7	$	—	$	2,426.7	$	(138.0)	$	2,288.7
United States		1,486.2		54.0		370.2		1,910.4		—		1,910.4
Peru		162.2		—		614.5		776.7		(161.7)		615.0
Brazil		—		41.3		410.7		452.0		—		452.0
Chile		19.9		—		424.6		444.5		—		444.5
Other American countries		35.4		2.6		27.7		65.7		—		65.7
Europe:
Switzerland		693.7		44.6		739.5		1,477.8		—		1,477.8
Italy		2.1		19.3		240.0		261.4		—		261.4
Spain		420.7		—		37.5		458.2		—		458.2
Other European countries		124.3		31.1		207.4		362.8		—		362.8
Asia:
China		517.6		—		54.9		572.5		—		572.5
Singapore		103.9		8.4		176.1		288.4		—		288.4
Japan		88.0		—		528.2		616.2		—		616.2
Other Asian countries		156.6		0.5		77.2		234.3		—		234.3
Total	$	5,772.6	$	666.5	$	3,908.5	$	10,347.6	$	(299.7)	$	10,047.9

Schedule of provisionally priced copper and molybdenum sales outstanding

Following are the provisionally priced copper and molybdenum sales outstanding at December 31, 2024:

	Sales volume	Priced at
	(million lbs.)	(per pound)	Month of settlement
Copper	149.0	3.96	January through April 2025
Molybdenum	13.0	21.08	January through April 2025

Schedule of provisional sales price adjustments included in accounts receivable and net sales

Provisional sales price adjustments included in accounts receivable and net sales were as follows at December, 31 (in millions):

	At December 31,
	2024		2023
Copper	$	(27.5)	$	17.8
Molybdenum		(14.1)		18.2
Total	$	(41.6)	$	36.0