Benefit Plans and Other Postretirement Benefits (Tables)

6 Months Ended

Jun. 30, 2019

Defined Benefit Plan Disclosure

Schedule of components of net pension expense

	Pension Benefits
Three Months Ended June 30:	2019		2018
Service cost	$	1.7	$	1.9
Interest cost		5.4		4.9
Expected return on plan assets		(9.2)		(9.6)
Amortization of prior service cost		0.4		0.6
Amortization of net actuarial losses		4.6		5.8
Net pension expense	$	2.9	$	3.6
Six Months Ended June 30:
Service cost	$	3.5	$	3.8
Interest cost		10.8		9.8
Expected return on plan assets		(18.5)		(19.3)
Amortization of prior service cost		0.8		1.2
Amortization of net actuarial losses		9.3		11.7
Net pension expense	$	5.9	$	7.2