Pension and Other Benefits (Tables)

3 Months Ended

Mar. 31, 2021

Defined Benefit Plans and Other Postretirement Benefit Plans Disclosures [Abstract]

Schedule of net pension and other benefit costs

The following table sets forth the components of net pension and other benefit costs for the three months ended March 31, 2021 and 2020 (in millions):

	Pension Benefits				Other Benefits
	2021		2020		2021		2020
Three Months Ended March 31,
Service cost	$	0.2	$	0.3	$	—	$	—
Interest cost	6.0		7.2		0.1		0.2
Expected return on plan assets	(9.1)		(8.5)		—		—
Amortization of prior service cost	—		—		—		(0.1)
Amortization of actuarial losses	2.7		2.4		—		—
NET PERIODIC BENEFIT COST	$	(0.2)	$	1.4	$	0.1	$	0.1