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INCOME TAXES: - Provision (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
U.S. federal and state:
Current	$ 0.1
Provision for income taxes	0.1
Foreign (Peru and Mexico):
Current	1,443.1	$ 2,425.5	$ 1,237.9
Deferred	118.6	(126.3)	(63.5)
Uncertain tax position	34.3
Provision for income taxes	1,596.0	2,299.2	1,174.4
Total income tax provision	1,596.1	2,299.2	1,174.4
Earnings by location:
U.S.	0.5	(32.4)	(15.3)
Peru	1,167.8	1,962.8	723.9
Mexico	3,079.5	3,766.4	2,037.2
Foreign	4,247.3	5,729.2	2,761.1
Income before income taxes	$ 4,247.8	$ 5,696.8	$ 2,745.8

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The component of income tax expense for the period representing amounts paid or payable (or refundable) as determined by applying the provisions of enacted federal and state tax law to the domestic taxable Income or Loss from continuing operations.

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