Pension and Postretirement Benefits (Tables)

6 Months Ended

Jun. 30, 2021

Retirement Benefits [Abstract]

Schedule of net periodic benefit cost

The components of net periodic benefit (income) expense costs recognized for the three and six months ended June 30, 2021 and 2020 were as follows:

	Pension Benefits								Postretirement Benefits
	Three Months Ended June 30,				Six Months Ended June 30,				Three Months Ended June 30,				Six Months Ended June 30,
	2021		2020		2021		2020		2021		2020		2021		2020
	(In millions)
Service costs	$	1.1	$	1.1	$	2.2	$	2.2	$	—	$	—	$	—	$	—
Interest costs	0.4		0.6		0.7		1.1		0.1		0.1		0.1		0.1
Expected return on plan assets	(3.1)		(2.9)		(6.2)		(5.8)		—		—		—		—
Recognized net actuarial loss	0.2		0.5		0.4		1.0		0.1		—		0.2		0.1
Net periodic benefit (income) expense	$	(1.4)	$	(0.7)	$	(2.9)	$	(1.5)	$	0.2	$	0.1	$	0.3	$	0.2