Benefit Plans and Other Postretirement Benefits (Tables)

9 Months Ended

Sep. 30, 2018

Benefit Plans and Other Postretirement Benefits

Schedule of components of net pension expense

					Other Postretirement
	Pension Benefits				Benefits
Three Months Ended September 30:	2018		2017		2018		2017
Service cost	$	1.8	$	2.5	$	—	$	—
Interest cost		4.9		5.0		0.1		0.1
Expected return on plan assets		(9.6)		(7.8)		—		—
Amortization of prior service cost		0.6		0.7		—		—
Amortization of net actuarial losses		5.8		5.8		0.1		0.2
Net pension expense	$	3.5	$	6.2	$	0.2	$	0.3
Nine Months Ended September 30:
Service cost	$	5.6	$	7.3	$	—	$	—
Interest cost		14.7		14.9		0.3		0.3
Expected return on plan assets		(28.9)		(23.2)		—		—
Amortization of prior service cost		1.8		2.1		—		—
Amortization of net actuarial losses		17.5		17.2		0.3		0.5
Net pension expense	$	10.7	$	18.3	$	0.6	$	0.8