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Note 3 - Financing Arrangements (Tables) | 12 Months Ended
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Dec. 31, 2019
Notes Tables |
Schedule of Debt [Table Text Block] |
|  | December 31, |
|  | 2019 |  |  | 2018 |
Senior revolving line of credit |  | $ | - |  |  | $ | 307.1 |
Senior notes |  |  | 1,295.7 |  |  |  | 842.0 |
Less current portion of long-term debt |  |  | - |  |  |  | (250.7 | )
Total long-term debt |  | $ | 1,295.7 |  |  | $ | 898.4 |

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