INCOME TAXES - Sources and Tax Effects of Differences Between Expenses (Benefit) Continuing Operations before Income Taxes (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2025	Dec. 31, 2024	Dec. 31, 2023
Amount
Income tax expense / Federal statutory tax rate	$ 291.9	$ 246.1	$ 261.5
State & local income taxes, net of federal Income tax effect	54.4	24.7	49.0
Foreign tax effects	(1.1)	6.3	9.2
Effect of cross-border tax laws	0.3	1.0	1.2
Tax credits	(3.6)	(4.2)	(1.9)
Tax benefit of depletion	(43.1)	(39.9)	(38.9)
Impairment	0.1	16.2	16.2
Other	10.9	3.8	5.5
Changes in unrecognized tax benefits	(2.3)	(2.5)	(2.7)
Other adjustments	0.0	(0.1)	0.3
Total Income Tax Expense	$ 307.5	$ 251.4	$ 299.4
Percent
Income tax expense / Federal statutory tax rate	21.00%	21.00%	21.00%
State & local income taxes, net of federal Income tax effect	3.90%	2.10%	3.90%
Foreign tax effects	(0.10%)	0.50%	0.70%
Tax credits	(0.30%)	(0.40%)	(0.20%)
Effect of cross-border tax laws	0.00%	0.10%	0.10%
Tax benefit of depletion	(3.10%)	(3.40%)	(3.10%)
Impairment	0.00%	1.40%	1.30%
Other	0.80%	0.30%	0.50%
Changes in unrecognized tax benefits	(0.10%)	(0.20%)	(0.20%)
Other adjustments	0.00%	0.00%	0.00%
Total income tax expense / Effective tax rate	22.10%	21.40%	24.00%