DEFINED BENEFIT PENSION PLANS

The following table sets forth the net periodic pension cost for our defined benefit pension and postretirement plans during the quarter and nine months ended September 30, 2018 and 2017. In accordance with ASU 2017-07, "Retirement Benefits - Improving the Presentation of Net Periodic Pension Cost and Net Periodic Postretirement Benefit Cost" (an amendment to ASC 715), all non-service related costs associated with our pension and post retirement plans are recorded outside of operating income. The net periodic pension cost included the following components:



	Quarter Ended						Nine Months Ended
	September 30,						September 30,
Dollar amounts in millions	2018			2017			2018			2017
Service cost	$	1.2		$	1.4		$	3.4		$	4.1
Other components of net periodic pension cost:
Interest cost	2.9			3.3			8.6			9.7
Expected return on plan assets	(3.3		)	(3.3		)	(10.1		)	(9.8		)
Amortization of prior service cost ¹	0.1			0.2			0.3			0.6
Amortization of net loss ¹	1.5			1.4			4.7			4.2
Net periodic pension cost	$	2.4		$	3.0		$	6.9		$	8.8

Net periodic pension cost included in cost of sales	$	0.8		$	0.9		$	2.1		$	2.7
Net periodic pension cost included in selling, general, and administrative expenses	0.4			0.5			1.3			1.4
Net periodic pension cost included in other non-operating items	1.2			1.6			3.5			4.7
	$	2.4		$	3.0		$	6.9		$	8.8

¹The amortization of prior service costs and net loss are included in the amounts reclassified from accumulated other comprehensive income (loss). See Note 16 for additional details.

During the nine months ended September 30, 2018, we made $40.9 million in pension contributions to our defined benefit pension plans, which included a discretionary payment of $33.2 million to maximize the tax savings allowed under the Tax Cuts and Jobs Act and to lower our expenses associated with pension funding regulations going forward. We expect to contribute about $3.0 million to our defined benefit pension plans in the remaining months of 2018.