Benefit Plans and Other Postretirement Benefits (Tables)

6 Months Ended

Jun. 30, 2021

Benefit Plans and Other Postretirement Benefits

Schedule of components of net pension expense

	Pension Benefits
Three Months Ended June 30:	2021		2020
Service cost	$	1.9	$	1.8
Interest cost		2.8		4.1
Expected return on plan assets		(7.8)		(9.3)
Amortization of prior service cost		0.5		0.6
Amortization of net actuarial losses		6.2		6.3
Net pension expense	$	3.6	$	3.5
Six Months Ended June 30:
Service cost	$	3.8	$	3.8
Interest cost		5.6		8.3
Expected return on plan assets		(15.6)		(18.6)
Amortization of prior service cost		1.0		1.1
Amortization of net actuarial losses		12.4		12.5
Net pension expense	$	7.2	$	7.1