SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Tables)

12 Months Ended

Dec. 31, 2023

SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES [Abstract]

Results from Discontinued Operations

in millions	2023	2022	2021
Discontinued Operations
Pretax loss	$          (14.7)	$         (25.2)	$           (4.5)
Income tax benefit	3.9	6.6	1.2
Loss on discontinued operations, net of tax	$          (10.8)	$         (18.6)	$           (3.3)

Depreciation, Depletion, Accretion and Amortization Expense

in millions	2023	2022	2021
Depreciation, Depletion, Accretion and Amortization
Depreciation	$          441.1	$        409.1	$        343.4
Depletion	61.1	50.2	31.2
Accretion	13.9	14.1	13.1
Depreciation of finance leases	12.8	16.5	7.1
Amortization of intangibles	88.1	97.6	68.2
Total	$          617.0	$        587.5	$        463.0

Fair Value Measurement on Recurring Basis

	Level 1 Fair Value
in millions	2023	2022
Fair Value Recurring
Rabbi Trust
Mutual funds	$          31.7	$         28.6
Total	$          31.7	$         28.6

	Level 2 Fair Value
in millions	2023	2022
Fair Value Recurring
Interest rate swaps	$          (0.3)	$          0.0
Rabbi Trust
Money market mutual fund	0.5	1.5
Total	$           0.2	$          1.5

Liabilities Under Self-Insurance Program

dollars in millions	2023	2022
Self-insurance Program
Self-insured liabilities (undiscounted)	$          151.7	$        146.7
Insured liabilities (undiscounted)	2.3	2.3
Discount rate	4.56%	4.20%
Amounts Recognized in Consolidated
Balance Sheets
Investments and long-term receivables	2.3	2.3
Other current liabilities	(59.6)	(51.4)
Other noncurrent liabilities	(76.1)	(81.7)
Net insurance liabilities (discounted)	$         (133.4)	$       (130.8)

Estimated Payments (Undiscounted) Under Self-Insurance Program

in millions
Estimated Payments under Self-insurance Program
2024	$           48.9
2025	32.2
2026	20.8
2027	11.0
2028	5.5

Unrecognized Compensation Expense

	Unrecognized	Expected
	Compensation	Weighted-average
dollars in millions	Expense	Recognition (Years)
Share-based Compensation
SOSARs 1	$             1.2	1.2
Performance shares	17.7	1.7
Restricted shares	13.1	1.8
Total/weighted-average	$           32.0	1.7

¹ Stock-Only Stock Appreciation Rights (SOSARs)

Pretax Compensation Expense

in millions	2023	2022	2021
Employee Share-based Compensation Awards
Pretax compensation expense	$           60.6	$          38.7	$          32.5
Income tax benefits	9.1	6.9	4.7

Weighted-Average Common Shares Outstanding Assuming Dilution

in millions	2023	2022	2021
Weighted-average common shares outstanding	133.0	133.0	132.8
Dilutive effect of
SOSARs	0.2	0.2	0.3
Other stock compensation awards	0.5	0.4	0.4
Weighted-average common shares outstanding,
assuming dilution	133.7	133.6	133.5

Antidilutive Common Stock Equivalents

in millions	2023	2022	2021
Antidilutive common stock equivalents	0.0	0.1	0.0