PROPERTY, PLANT & EQUIPMENT	12 Months Ended
	Dec. 31, 2021
PROPERTY, PLANT & EQUIPMENT [Abstract]
PROPERTY, PLANT & EQUIPMENT	NOTE 4: PROPERTY, PLANT & EQUIPMENTBalances of major classes of assets and allowances for depreciation, depletion and amortization at December 31 are as follows: in millions2021 2020 Property, Plant & Equipment Land and land improvements 1$       3,631.7  $      3,013.3  Buildings 182.9  145.4  Machinery and equipment 6,109.2  5,517.9  Finance leases (see Note 7) 36.3  7.8  Deferred asset retirement costs (see Note 17) 2 182.5  240.8  Construction in progress 301.8  176.9  Total, gross$     10,444.4  $      9,102.1  Less allowances for depreciation, depletion and amortization 4,897.6  4,676.1  Total, net$       5,546.8  $      4,426.0  1Includes depletable land as follows: December 31, 2021 — $2,238.4 million and December 31, 2020 — $1,712.1 million. 2This significant decrease is due to the write-off of assets with a corresponding write-off of allowances for depreciation. Capitalized interest costs with respect to qualifying construction projects and total interest costs incurred before recognition of the capitalized amount for the years ended December 31 are as follows: in millions2021 2020 2019 Capitalized interest cost$             4.2  $            3.5  $            3.9  Total interest cost incurred before recognition of the capitalized amount 153.5  139.5  134.1    Capitalized software costs of $14.7 million (including $13.2 million of capitalized software obtained via the U.S. Concrete acquisition) and $2.1 million are reflected in net property, plant & equipment as of December 31, 2021 and 2020, respectively. We capitalized software costs for the years ended December 31 as follows: 2021 — $2.7 million, 2020 — $1.1 million and 2019 — $1.5 million.