Employee Retirement Plans (Tables)

9 Months Ended

Sep. 30, 2020

Retirement Benefits [Abstract]

Schedule of Costs of Retirement Plans [Table Text Block]

The following table summarizes the components of our net retirement cost:

	Three Months Ended September 30,				Nine Months Ended September 30,
	2020		2019		2020		2019
	(in millions)
Expense Components
Service cost	$	—	$	—	$	—	$	0.1
Interest	3.8		5.0		11.2		14.8
Expected return on plan assets	(5.3)		(5.8)		(15.7)		(17.3)
Amortization of actuarial loss	1.5		1.2		4.5		3.4
Amortization of prior service cost	0.3		—		0.9		—
Net periodic benefit cost	0.3		0.4		0.9		1.0
Profit sharing	1.9		3.1		6.5		8.3
Net expense	$	2.2	$	3.5	$	7.4	$	9.3