INCOME TAXES (Tables)

12 Months Ended

Dec. 31, 2023

INCOME TAXES [Abstract]

Components of Earnings From Continuing Operations before Income Taxes

in millions	2023	2022	2021
Earnings from Continuing Operations
before Income Taxes
Domestic	$       1,251.0	$        788.7	$        871.6
Foreign	(5.9)	(0.6)	2.2
Total	$       1,245.1	$        788.1	$        873.8

Income Tax Expense (Benefit) from Continuing Operations

in millions	2023	2022	2021
Income Tax Expense (Benefit) from
Continuing Operations
Current
Federal	$          274.8	$          85.2	$        103.9
State and local	64.0	43.6	34.6
Foreign	4.8	4.6	(5.0)
Total	$          343.6	$        133.4	$        133.5
Deferred
Federal	$           (44.1)	$          43.4	$          39.2
State and local	(4.2)	3.3	26.5
Foreign	4.1	12.9	0.9
Total	$           (44.2)	$          59.6	$          66.6
Total expense	$          299.4	$        193.0	$        200.1

Sources and Tax Effects of Differences Between Expense (Benefit) from Income Taxes and Amount Computed by Applying Federal Statutory Income Tax Rate to Earnings from Continuing Operations before Income Taxes

dollars in millions	2023		2022		2021
Income tax expense at the federal
statutory tax rate	$       261.5	21.0%	$       165.5	21.0%	$       183.5	21.0%
Expense (Benefit) from
Income Tax Differences
Statutory depletion	(39.0)	-3.1%	(30.6)	-3.9%	(28.3)	-3.2%
State and local income taxes, net of federal
income tax benefit	48.7	3.9%	37.5	4.8%	34.7	4.0%
Nondeductible goodwill	16.2	1.3%	10.7	1.4%	0.0	0.0%
Valuation allowance	10.3	0.8%	14.5	1.8%	13.7	1.6%
Other, net	1.7	0.1%	(4.6)	-0.6%	(3.5)	-0.5%
Total income tax expense/
Effective tax rate	$       299.4	24.0%	$       193.0	24.5%	$       200.1	22.9%

Components of Net Deferred Income Tax Liability

in millions	2023	2022
Deferred Tax Assets Related to
Operating lease liabilities	$          139.1	$        149.7
Asset retirement obligations & other reserves	87.1	82.5
State net operating losses	79.6	86.3
Incentive compensation	57.6	62.1
State bonus depreciation	54.7	41.4
Employee benefits	22.9	14.2
Other	82.3	72.0
Total gross deferred tax assets	$          523.3	$        508.2
Valuation allowance	(89.5)	(76.8)
Total net deferred tax asset	$          433.8	$        431.4
Deferred Tax Liabilities Related to
Property, plant & equipment	$          907.1	$        889.4
Goodwill/other intangible assets	334.4	379.2
Operating lease right-of-use assets	128.2	143.6
Other	93.0	92.0
Total deferred tax liabilities	$       1,462.7	$     1,504.2
Deferred income tax liability, net	$       1,028.9	$     1,072.8

Changes in Unrecognized Income Tax Benefits

in millions	2023	2022	2021
Unrecognized tax benefits as of January 1	$           18.7	$          10.8	$            6.8
Increases for tax positions related to
Prior years	0.3	4.6	0.5
Current year	4.8	6.6	3.9
Decreases for tax positions related to
Prior years	(0.5)	(0.2)	0.0
Expiration of applicable statute of limitations	(2.3)	(3.1)	(0.4)
Unrecognized tax benefits as of December 31	$           21.0	$          18.7	$          10.8