PROPERTY, PLANT & EQUIPMENT (Tables)

12 Months Ended

Dec. 31, 2022

PROPERTY, PLANT & EQUIPMENT [Abstract]

Property, Plant and Equipment

in millions	2022	2021
Property, Plant & Equipment
Land and land improvements 1	$       3,991.1	$      3,631.7
Buildings	223.3	182.9
Machinery and equipment	6,454.2	6,109.2
Finance leases (see Note 7)	93.2	36.3
Deferred asset retirement costs	165.9	182.5
Construction in progress	378.7	301.8
Total, gross	$     11,306.4	$    10,444.4
Less allowances for depreciation, depletion
and amortization	5,255.1	4,897.6
Total, net	$       6,051.3	$      5,546.8

¹ Includes depletable land as follows: December 31, 2022 — $2,445.6 million and December 31, 2021 — $2,238.4 million.

Capitalized Interest Costs and Total Interest Costs Incurred

in millions	2022	2021	2020
Capitalized interest cost	$             3.6	$            4.2	$            3.5
Total interest cost incurred before recognition
of the capitalized amount	172.8	153.5	139.5