Postretirement Benefit Plans

3 Months Ended

Mar. 31, 2018

The components of net periodic benefit cost for our defined benefit pension plans are as follows:



	Three Months Ended
	March 31,
(in millions)	2018			2017
Domestic defined benefit pension plans:
Service cost	$	1		$	1
Interest cost	1			1
Expected return on plan assets	(2		)	(2		)
Amortization of net actuarial loss	1			1
Net periodic benefit cost	$	1		$	1
International defined benefit pension plans:
Service cost	$	2		$	3
Interest cost	5			5
Expected return on plan assets	(9		)	(8		)
Amortization of net actuarial loss	2			2
Settlement/Curtailment	1			—
Net periodic benefit cost	$	1		$	2
Total net periodic benefit cost	$	2		$	3

The components of net periodic benefit cost other than the service cost component are included in the line item "other non-operating income (expense), net" in the Condensed Consolidated Income Statements.

The total net periodic benefit cost for other postretirement employee benefit plans was less than $1 million including amounts recognized in other comprehensive income ("OCI") of $1 million for the three months ended March 31, 2018. The total net periodic benefit cost for other postretirement employee benefit plans was $1 million including amounts recognized in OCI of less than $1 million for the three months ended March 31, 2017.

We contributed $6 million and $6 million to our defined benefit plans during the three months ended March 31, 2018 and 2017, respectively. Additional contributions ranging between approximately $14 million and $24 million are expected during the remainder of 2018.