Pension and Postretirement Health and Life Benefits (Tables)

6 Months Ended

Jun. 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   June 30,						Six Months Ended   June 30,
	2020			2019			2020			2019
Service costs	$	0.9		$	0.8		$	1.8		$	1.6
Interest costs	6.0			7.6			12.1			15.2
Amortization of prior service costs (credits), net	—			—			(0.1		)	—
Expected return on plan assets (gains)	(9.4		)	(9.1		)	(18.8		)	(18.2		)
Net periodic benefit (credits)	$	(2.5	)	$	(0.7	)	$	(5.0	)	$	(1.4	)

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

	Three Months Ended   June 30,				Six Months Ended   June 30,
	2020		2019		2020		2019
Interest costs	$	1.2	$	1.5	$	2.4	$	3.0
Amortization of prior service costs (credits), net	—		—		—		(0.1		)
Net periodic benefit costs	$	1.2	$	1.5	$	2.4	$	2.9