Retirement Plans

3 Months Ended

Mar. 31, 2019

Compensation And Retirement Disclosure [Abstract]

Retirement Plans

7. Retirement Plans

Components of net pension and other postretirement benefits plan (“OPEB”) income for the three months ended March 31, 2019 and 2018 were as follows:

	Three Months Ended
	March 31,
	2019			2018
Pension expense (income):
Service cost	$	0.2		$	0.2
Interest cost		8.4			7.8
Expected return on plan assets		(11.6	)		(12.6	)
Amortization, net		1.5			2.0
Settlements		—			0.3
Net pension income	$	(1.5	)	$	(2.3	)
OPEB expense (income):
Service cost	$	—		$	0.4
Interest cost		2.6			2.6
Expected return on plan assets		(3.3	)		(3.5	)
Amortization, net		(1.8	)		(0.7	)
Net OPEB income	$	(2.5	)	$	(1.2	)

During the three months ended March 31, 2019, we contributed $2.0 million to our retirement plans.