Benefit Plans

Components of net periodic benefit cost for our pension plans for the three months ended March 31, 2018 and 2017 were as follows:



	U.S. pension plans
	Three months ended
In millions	March 31, 2018			March 31, 2017
Service cost	$	0.8		$	2.6
Interest cost	3.0			4.1
Expected return on plan assets	(2.2		)	(2.9		)
Net periodic benefit cost	$	1.6		$	3.8



	Non-U.S. pension plans
	Three months ended
In millions	March 31, 2018			March 31, 2017
Service cost	$	1.8		$	1.8
Interest cost	1.1			0.9
Expected return on plan assets	(0.4		)	(0.3		)
Net periodic benefit cost	$	2.5		$	2.4

As described in Note 1, during the first quarter of 2018, the Company adopted ASU 2017-07. As a result, service costs are classified as employee compensation costs within Cost of goods sold and Selling, general and administrative expense within the Condensed Consolidated Statements of Operations and Comprehensive Income. All other components of net periodic benefit cost are classified within Other expense for the periods presented.

Components of net periodic benefit cost for our other post-retirement plans for the three months ended March 31, 2018 and 2017 were not material.