Pension and Postretirement Health and Life Benefits (Tables)

9 Months Ended

Sep. 30, 2020

Defined Benefit Plan Disclosure [Line Items]

Schedule of Net Benefit Costs [Table Text Block]

The components of net periodic benefit (credits) for the defined benefit pension plans were as follows (in millions):

	Three Months Ended September 30,				Nine Months Ended September 30,
	2020		2019		2020		2019
Service costs	$	0.9	$	0.8	$	2.7	$	2.4
Interest costs	6.0		7.5		18.2		22.7
Amortization of prior service costs (credits), net	—		—		(0.2)		—
Expected return on plan assets (gains)	(9.3)		(9.1)		(28.1)		(27.3)
Net periodic benefit (credits)	$	(2.4)	$	(0.8)	$	(7.4)	$	(2.2)

The components of net periodic benefit costs for the postretirement health and life benefit plans were as follows (in millions):

	Three Months Ended September 30,				Nine Months Ended September 30,
	2020		2019		2020		2019
Interest costs	$	1.2	$	1.5	$	3.6	$	4.5
Amortization of prior service costs (credits), net	(0.1)		—		(0.1)		(0.1)
Net periodic benefit costs	$	1.1	$	1.5	$	3.5	$	4.4