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LEASES (Tables) | 12 Months Ended
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Dec. 31, 2024
Leases [Abstract] |
Schedule of Lease Assets and Liabilities, Weighted-Average Lease Term and Discount Rate | Lease right-of-use (ROU) assets and liabilities reflected on our December 31 balance sheets and the weighted-average lease terms and discount rates are as follows:
dollars in millions | Classification on the Balance Sheet | 2024 | 2023
Assets |  |  |
Operating lease ROU assets |  | $ | 673.2 |  | $ | 636.1 |
Accumulated amortization |  | (146.8) |  | (124.4) |
Operating leases, net | Operating lease right-of-use assets, net | 526.4 |  | 511.7 |
Finance lease ROU assets |  | 54.7 |  | 62.3 |
Accumulated depreciation |  | (24.3) |  | (20.2) |
Finance leases, net | Property, plant & equipment, net | 30.4 |  | 42.1 |
Total lease assets |  | $ | 556.8 |  | $ | 553.8 |
Liabilities |  |  |
Current |  |  |
Operating | Other current liabilities | $ | 49.3 |  | $ | 47.3 |
Finance | Other current liabilities | 10.7 |  | 12.5 |
Noncurrent |  |  |
Operating | Noncurrent operating lease liabilities | 521.4 |  | 507.4 |
Finance | Other noncurrent liabilities | 9.7 |  | 16.6 |
Total lease liabilities |  | $ | 591.1 |  | $ | 583.8 |
Lease Term and Discount Rate |  |  |
Weighted-average remaining lease term (years) |  |  |
Operating leases |  | 18.9 | 19.5
Finance leases |  | 2.2 | 2.5
Weighted-average discount rate |  |  |
Operating leases |  | 4.5 | % | 4.3 | %
Finance leases |  | 3.2 | % | 2.4 | %
Schedule of Components of Lease Expense | The components of lease expense for the years ended December 31, 2024, 2023 and 2022 are as follows:
in millions | 2024 | 2023 | 2022
Finance lease cost |  |  |
Depreciation of right-of-use assets | $ | 9.5 |  | $ | 12.8 |  | $ | 16.5 |
Interest on lease liabilities | 0.7 |  | 0.9 |  | 1.2 |
Operating lease cost | 75.6 |  | 77.5 |  | 85.6 |
Short-term lease cost 1 | 46.9 |  | 50.4 |  | 46.4 |
Variable lease cost | 20.6 |  | 23.5 |  | 14.4 |
Sublease income | (2.8) |  | (3.4) |  | (2.9) |
Total lease expense | $ | 150.5 |  | $ | 161.7 |  | $ | 161.2 |
1Includes the cost of leases with an initial term of one year or less (including those with terms of one month or less).
Schedule of Maturity Analysis on an Undiscounted Basis | Maturity analysis on an undiscounted basis of our lease liabilities (see Note 12 for mineral lease payments) as of December 31, 2024 is as follows:
in millions | Operating Leases | Finance Leases
2025 | $ | 73.8 |  | $ | 11.2 |
2026 | 66.7 |  | 6.7 |
2027 | 62.2 |  | 2.1 |
2028 | 55.2 |  | 0.8 |
2029 | 50.8 |  | 0.4 |
Thereafter | 608.7 |  | 0.0 |
Total minimum lease payments | $ | 917.4 |  | $ | 21.2 |
Lease payments representing interest | (346.7) |  | (0.8) |
Present value of future minimum lease payments | $ | 570.7 |  | $ | 20.4 |
Current obligations under leases | (49.3) |  | (10.7) |
Long-term lease obligations | $ | 521.4 |  | $ | 9.7 |

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- Definition Tabular disclosure of lessee's lease cost. Includes, but is not limited to, interest expense for finance lease, amortization of right-of-use asset for finance lease, operating lease cost, short-term lease cost, variable lease cost and sublease income. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 842 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 4 -Publisher FASB -URI https://asc.fasb.org/1943274/2147478964/842-20-50-4 + Details
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- Definition Lessee Operating And Finance Lease Liability Maturity [Table Text Block] + References No definition available. + Details
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- Definition Schedule of Lease Assets and Liabilities, Weighted-Average Lease Term and Discount Rate [Table Text Block] + References No definition available. + Details
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