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Note 4 - Fair Value Measurements (Tables) | 9 Months Ended
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Sep. 30, 2020
Notes Tables |
Schedule of Carrying Values and Estimated Fair Values of Debt Instruments [Table Text Block] |
|  |  | 2020 |  |  | 2019 |
| Fair Value |  | Carrying |  |  | Estimated |  |  | Carrying |  |  | Estimated |
| Hierarchy |  | Value |  |  | Fair Value |  |  | Value |  |  | Fair Value |
Financial instruments not carried at fair value: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Current portion of long-term debt and long-term debt excluding finance lease liabilities and syndicated revolving credit facility debt issuance costs | Level 2 |  | $ | 3,140.4 |  |  | $ | 3,642.2 |  |  | $ | 2,650.4 |  |  | $ | 2,902.2 |

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- Definition Tabular disclosure of information pertaining to carrying amount and estimated fair value of short-term and long-term debt instruments or arrangements, including but not limited to, identification of terms, features, and collateral requirements. + References No definition available. + Details
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