Retirement Plans

6 Months Ended

Jun. 30, 2019

Compensation And Retirement Disclosure [Abstract]

(10) Retirement Plans

The components of the net periodic benefit cost (credit) for our plans were as follows:

	Defined Benefit Pension Plan
	3 Months Ended						6 Months Ended
	June 30,						June 30,
	2019			2018			2019			2018
Service cost	$	4.3		$	2.8		$	6.8		$	5.6
Interest cost		3.2			2.9			6.3			5.9
Expected return on assets		(3.6	)		(2.7	)		(5.9	)		(5.5	)
Other		0.4			0.3			0.9			0.7
Total benefit cost	$	4.3		$	3.3		$	8.1		$	6.7


	Retiree Health Care Plan
	3 Months Ended						6 Months Ended
	June 30,						June 30,
	2019			2018			2019			2018
Interest cost	$	0.2		$	0.1		$	0.3		$	0.2
Prior service credit		(0.2	)		(0.2	)		(0.4	)		(0.4	)
Total benefit credit	$	-		$	(0.1	)	$	(0.1	)	$	(0.2	)

During the three and six months ended June 30, 2019, contributions made to our pension plans were $2.9 and $4.4, respectively, and contributions made to our retiree health care plan were $0.3 and $0.6, respectively. During 2019, we expect to make total contributions of approximately $13.0 to our pension plans and to fund our retiree health care payments as incurred.