COMMITMENTS AND CONTINGENCIES (Tables)

12 Months Ended

Dec. 31, 2023

COMMITMENTS AND CONTINGENCIES [Abstract]

Commitments Due

	Unconditional
	Purchase
in millions	Obligations
Property, Plant & Equipment
2024	$           11.1
Thereafter	0.0
Total	$           11.1
Noncapital (primarily transportation and electricity contracts)
2024	$           46.3
2025–2026	53.4
2027–2028	51.8
Thereafter	19.2
Total	$         170.7

Minimum Royalties Under Mineral Leases

	Mineral
in millions	Leases
Minimum Royalties
2024	$           28.5
2025–2026	39.6
2027–2028	29.1
Thereafter	143.3
Total	$         240.5