Retirement Plans

3 Months Ended

Mar. 31, 2020

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, 2020 and 2019 were as follows:

	Three Months Ended
	March 31,
	2020			2019
Pension income:
Service cost	$	0.3		$	0.2
Interest cost		6.9			8.4
Expected return on plan assets		(10.2	)		(11.6	)
Amortization, net		2.5			1.5
Net pension income	$	(0.5	)	$	(1.5	)
OPEB income:
Interest cost		1.8			2.6
Expected return on plan assets		(3.2	)		(3.3	)
Amortization, net		(1.5	)		(1.8	)
Net OPEB income	$	(2.9	)	$	(2.5	)

During the three months ended March 31, 2020 and 2019, we contributed $4.0 million and $2.0 million, respectively, to our retirement plans.