Note 4 - Fair Value Measurements (Tables)

9 Months Ended

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