Note 13 - Pension and Postretirement Benefits (Tables)

9 Months Ended

Sep. 30, 2020

Notes Tables

Schedule of Net Benefit Costs [Table Text Block]

	Pension Plan and SERP						Postretirement Plan
	For the Three Months Ended September 30,
	2020			2019			2020			2019
Interest cost	$	2.9		$	3.4		$	—		$	—
Expected return on plan assets		(7.9	)		(7.1	)		(0.1	)		—
Amortization of net actuarial loss		1.7			0.7			0.1			0.1
Net periodic (benefit) cost	$	(3.3	)	$	(3.0	)	$	—		$	0.1
Employer contributions, net	$	0.2		$	0.2		$	0.1		$	(0.1	)

	Pension Plan and SERP						Postretirement Plan
	For the Nine Months Ended September 30,
	2020			2019			2020			2019
Interest cost	$	9.8		$	11.8		$	0.1		$	0.2
Expected return on plan assets		(22.3	)		(22.6	)		(0.2	)		(0.1	)
Amortization of prior service cost (credit)		0.1			0.1			(0.1	)		(0.1	)
Amortization of net actuarial loss		4.6			3.5			0.3			0.3
Net periodic (benefit) cost	$	(7.8	)	$	(7.2	)	$	0.1		$	0.3
Employer contributions, net	$	0.6		$	0.6		$	0.9		$	(0.4	)