SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - Depreciation, Depletion, Accretion and Amortization Expense (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2025	Dec. 31, 2024	Dec. 31, 2023
Accounting Policies [Abstract]
Depreciation	$ 544.6	$ 464.6	$ 441.1
Depletion	86.1	59.5	61.1
Accretion	20.7	14.7	13.9
Depreciation of finance leases	8.0	9.5	12.8
Amortization of intangibles	89.0	83.9	88.1
Total depreciation, depletion, accretion and amortization	$ 748.5	$ 632.2	$ 617.0