INCOME TAXES	12 Months Ended
	Dec. 31, 2021
INCOME TAXES [Abstract]
INCOME TAXES	NOTE 9: INCOME TAXESThe components of earnings from continuing operations before income taxes are as follows: in millions2021 2020 2019 Earnings from Continuing Operations before Income Taxes Domestic$          871.6  $        733.0  $        734.0  Foreign 2.2  10.8  23.7  Total$          873.8  $        743.8  $        757.7  Income tax expense (benefit) from continuing operations consists of the following: in millions2021 2020 2019 Income Tax Expense (Benefit) from Continuing Operations Current Federal$          103.9  $          69.2  $          31.2  State and local 34.6  23.8  24.4  Foreign (5.0) 0.9  3.3  Total$          133.5  $          93.9  $          58.9  Deferred Federal$            39.2  $          50.9  $          67.8  State and local 26.5  10.8  8.7  Foreign 0.9  0.2  (0.2) Total$            66.6  $          61.9  $          76.3  Total expense$          200.1  $        155.8  $        135.2  Income tax expense (benefit) differs from the amount computed by applying the federal statutory income tax rate to earnings from continuing operations before income taxes. The sources and tax effects of the differences are as follows: dollars in millions2021 2020 2019 Income tax expense at the federal statutory tax rate$       183.5 21.0% $       156.2 21.0% $       159.1 21.0% Expense (Benefit) from Income Tax Differences Statutory depletion (28.3)-3.2% (24.7)-3.3% (23.0)-3.0% State and local income taxes, net of federal income tax benefit 34.7 4.0% 27.4 3.7% 26.1 3.4% Share-based compensation (6.1)-0.7% (6.9)-0.9% (17.2)-2.3% Uncertain tax positions 2.5 0.3% 1.4 0.2% 1.8 0.2% AL NOL valuation allowance 13.7 1.6% 0.0 0.0% 0.0 0.0% Research and development credit (2.7)-0.3% (2.7)-0.4% (9.5)-1.3% Other, net 2.8 0.2% 5.1 0.6% (2.1)-0.2% Total income tax expense/ Effective tax rate$       200.1 22.9% $       155.8 20.9% $       135.2 17.8% Deferred taxes on the balance sheet result from temporary differences between the amount of assets and liabilities recognized for financial reporting and tax purposes. The components of the net deferred income tax liability at December 31 are as follows: in millions2021 2020 Deferred Tax Assets Related to Employee benefits$           11.8  $          21.9  Incentive compensation 62.5  58.2  Asset retirement obligations & other reserves 77.9  58.3  State net operating losses 75.0  67.7  Other 59.1  25.4  Total gross deferred tax assets$         286.3  $        231.5  Valuation allowance (53.3) (32.5) Total net deferred tax asset$         233.0  $        199.0  Deferred Tax Liabilities Related to Property, plant & equipment$         794.3  $        622.9  Goodwill/other intangible assets 380.2  252.2  Other 64.4  30.0  Total deferred tax liabilities$      1,238.9  $        905.1  Net deferred tax liability$      1,005.9  $        706.1  As of December 31, 2021 and 2020, we have gross deferred tax assets of $176.7 million and $111.5 million, respectively, related to operating lease liabilities, and gross deferred tax liabilities of $176.7 million and $108.1 million, respectively, related to ROU assets. These amounts are presented net in Other deferred tax assets.In February 2021, the Alabama Business Competitiveness Act (ABC Act) was signed into law. The ABC Act contained a provision requiring most taxpayers to change from a three-factor, double-weighted sales method to a single-sales factor method to apportion income to Alabama. This provision had the effect of significantly reducing our apportionment of income to Alabama, thereby further inhibiting our ability to utilize our Alabama net operating loss (NOL) carryforward. As a result, we recorded a charge in the first quarter of 2021 to increase the valuation allowance by $13.7 million. No other material tax impacts resulted from the enactment of the ABC Act. Each quarter we analyze the likelihood that our deferred tax assets will be realized. A valuation allowance is recorded if, based on the weight of all available positive and negative evidence, it is more likely than not (a likelihood of more than 50%) that some portion, or all, of a deferred tax asset will not be realized. At December 31, 2021, we have Alabama state NOL carryforward deferred tax assets of $63.2 million, against which we have a valuation allowance of $42.9 million (after considering the ABC Act above). Almost all of the Alabama NOL carryforward would expire between 2023 and 2029 if not utilized.Changes in our liability for unrecognized tax benefits for the years ended December 31 are as follows: in millions2021 2020 2019 Unrecognized tax benefits as of January 1$             6.8  $            5.4  $            3.7  Increases for tax positions related to Prior years 0.5  0.4  0.2  Current year 3.9  1.9  3.2  Decreases for tax positions related to Prior years 0.0  0.0  0.0  Expiration of applicable statute of limitations (0.4) (0.9) (1.7) Unrecognized tax benefits as of December 31$           10.8  $            6.8  $            5.4  We classify interest and penalties recognized on the liability for unrecognized tax benefits as income tax expense. Interest and penalties recognized as income tax expense were $0.2 million in 2021, $0.0 million in 2020 and $0.0 million in 2019. The balance of accrued interest and penalties included in our liability for unrecognized tax benefits as of December 31 was $0.8 million in 2021, $0.3 million in 2020 and $0.3 million in 2019. Our liability for unrecognized tax benefits at December 31 in the table above includes $10.3 million in 2021, $6.6 million in 2020 and $5.3 million in 2019 that would affect the effective tax rate if recognized. We anticipate no single tax position generating a significant increase or decrease in our liability for unrecognized tax benefits within 12 months of this reporting date.As of December 31, 2021, income tax receivables of $5.0 million and $0.6 million are included in other accounts and notes receivable and other current assets, respectively, in the accompanying Consolidated Balance Sheet. There were similar receivables of $5.3 million and $0.9 million recorded in other accounts and notes receivable and other current assets, respectively, as of December 31, 2020.