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DEBT AND INTEREST (Tables) | 3 Months Ended
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Mar. 31, 2025
DEBT AND INTEREST |
Schedule of short-term debt obligations | ​
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​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | March 31 | ​ | December 31
(millions) |  | 2025 | ​ | 2024
Short-term debt | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Notes payable | ​ | ​ | $8.2 | ​ | ​ | ​ | $3.6 | ​
Long-term debt, current maturities | ​ | ​ | 606.0 | ​ | ​ | ​ | 612.1 | ​
Total | ​ | ​ | $614.2 | ​ | ​ | ​ | $615.7 | ​
Schedule of long-term debt obligations including current maturities | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ |  |  |  | ​ | ​ |  | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | Maturity | ​ | March 31 | ​ | December 31
(millions) | ​ | by Year | ​ | 2025 | ​ | 2024
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Long-term debt | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Public notes (2025 principal amount) | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Ten year 2015 senior notes (€575 million) | ​ | 2025 | ​ | ​ | $598.1 | ​ | ​ | ​ | $607.8 | ​
Ten year 2016 senior notes ($750 million) | ​ | 2026 | ​ | ​ | 739.7 | ​ | ​ | ​ | 735.2 | ​
Ten year 2017 senior notes ($500 million) | ​ | 2027 | ​ | ​ | 468.3 | ​ | ​ | ​ | 456.5 | ​
Six Year 2021 senior notes ($500 million) | ​ | 2027 | ​ | ​ | 498.4 | ​ | ​ | ​ | 498.2 | ​
Five Year 2022 senior notes ($500 million) | ​ | 2028 | ​ | ​ | 496.0 | ​ | ​ | ​ | 495.6 | ​
Ten year 2020 senior notes ($698 million) | ​ | 2030 | ​ | ​ | 660.6 | ​ | ​ | ​ | 657.2 | ​
Ten year 2020 senior notes ($600 million) | ​ | 2031 | ​ | ​ | 564.3 | ​ | ​ | ​ | 559.3 | ​
Eleven year 2021 senior notes ($650 million) | ​ | 2032 | ​ | ​ | 645.9 | ​ | ​ | ​ | 645.8 | ​
Thirty year 2011 senior notes ($389 million) | ​ | 2041 | ​ | ​ | 385.1 | ​ | ​ | ​ | 385.0 | ​
Thirty year 2016 senior notes ($200 million) | ​ | 2046 | ​ | ​ | 197.5 | ​ | ​ | ​ | 197.5 | ​
Thirty year 2017 senior notes ($484 million) | ​ | 2047 | ​ | ​ | 428.6 | ​ | ​ | ​ | 428.2 | ​
Thirty year 2020 senior notes ($500 million) | ​ | 2050 | ​ | ​ | 491.5 | ​ | ​ | ​ | 491.4 | ​
Thirty year 2021 senior notes ($850 million) | ​ | 2051 | ​ | ​ | 839.8 | ​ | ​ | ​ | 839.7 | ​
Thirty-four year 2021 senior notes ($685 million) | ​ | 2055 | ​ | ​ | 541.7 | ​ | ​ | ​ | 541.2 | ​
Finance lease obligations and other | ​ | ​ | ​ | ​ | 48.1 | ​ | ​ | ​ | 22.7 | ​
Total debt | ​ | ​ | ​ | ​ | 7,603.6 | ​ | ​ | ​ | 7,561.3 | ​
Long-term debt, current maturities | ​ | ​ | ​ | ​ | (606.0) | ​ | ​ | ​ | (612.1) | ​
Total long-term debt | ​ | ​ | ​ | ​ | $6,997.6 | ​ | ​ | ​ | $6,949.2 | ​
Schedule of interest expense and interest income | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | First Quarter Ended | ​
​ | ​ | March 31 | ​
(millions) | ​ | 2025 | ​ | 2024 | ​
Interest expense | ​ | ​ | $72.6 | ​ | ​ | ​ | $94.5 | ​
Interest income |  | ​ | (14.3) | ​ | ​ | ​ | (22.9) |
Interest expense, net | ​ | ​ | $58.3 | ​ | ​ | ​ | $71.6 | ​

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- Definition Tabular disclosure of long-debt instruments or arrangements, including identification, terms, features, collateral requirements and other information necessary to a fair presentation. These are debt arrangements that originally required repayment more than twelve months after issuance or greater than the normal operating cycle of the entity, if longer. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(22)) -SubTopic 10 -Topic 210 -Publisher FASB -URI https://asc.fasb.org/1943274/2147480566/210-10-S99-1 Reference 2: http://www.xbrl.org/2003/role/exampleRef -Topic 470 -SubTopic 20 -Name Accounting Standards Codification -Section 55 -Paragraph 69B -Publisher FASB -URI https://asc.fasb.org/1943274/2147481568/470-20-55-69B Reference 3: http://www.xbrl.org/2003/role/exampleRef -Topic 470 -SubTopic 20 -Name Accounting Standards Codification -Section 55 -Paragraph 69E -Publisher FASB -URI https://asc.fasb.org/1943274/2147481568/470-20-55-69E Reference 4: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 235 -SubTopic 10 -Name Accounting Standards Codification -Section S99 -Paragraph 3 -Subparagraph (SX 210.12-04(a)) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480678/235-10-S99-3 Reference 5: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 835 -SubTopic 30 -Name Accounting Standards Codification -Section 45 -Paragraph 2 -Publisher FASB -URI https://asc.fasb.org/1943274/2147482925/835-30-45-2 Reference 6: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section 50 -Paragraph 3 -Publisher FASB -URI https://asc.fasb.org/1943274/2147481112/505-10-50-3 Reference 7: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Topic 942 -SubTopic 470 -Section 50 -Paragraph 3 -Publisher FASB -URI https://asc.fasb.org/1943274/2147477734/942-470-50-3 Reference 8: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section 50 -Paragraph 8 -Publisher FASB -URI https://asc.fasb.org/1943274/2147481112/505-10-50-8 Reference 9: http://fasb.org/us-gaap/role/ref/legacyRef -Topic 505 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 6 -Publisher FASB -URI https://asc.fasb.org/1943274/2147481112/505-10-50-6 Reference 10: http://fasb.org/us-gaap/role/ref/legacyRef -Topic 505 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 7 -Publisher FASB -URI https://asc.fasb.org/1943274/2147481112/505-10-50-7 + Details
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