Note 2 - Newly Adopted Accounting Pronouncements (Tables)

12 Months Ended

Dec. 31, 2020

Notes Tables

Accounts Receivable, Allowance for Credit Loss [Table Text Block]

	2020			2019			2018
Balance at beginning of year	$	3.6		$	2.5		$	2.4
Charged to costs and expenses		2.2			2.5			0.4
Reclassification(1)		—			0.5			0.8
Charged to other accounts(2)		—			—			(0.2	)
Deductions(3)		(1.2	)		(1.9	)		(0.9	)
Balance at end of year	$	4.6		$	3.6		$	2.5