Pension and Postretirement Benefit Plans

We have a number of defined contribution and defined benefit, qualified and nonqualified, pension plans covering eligible employees. Other postretirement benefits (OPEB), including medical and life insurance, are provided for certain employees upon retirement.

Components of net periodic benefit cost (credit) —



	Pension
	2018						2017						OPEB - Non-U.S.
Three Months Ended June 30,	U.S.			Non-U.S.			U.S.			Non-U.S.			2018		2017
Interest cost	$	10		$	2		$	13		$	2		$	1	$	1
Expected return on plan assets	(17		)				(21		)	(1		)
Service cost				2						2
Amortization of net actuarial loss	7			1			6			1
Net periodic benefit cost (credit)	$	—		$	5		$	(2	)	$	4		$	1	$	1

Six Months Ended June 30,
Interest cost	$	21		$	3		$	26		$	4		$	2	$	2
Expected return on plan assets	(35		)	(1		)	(42		)	(2		)
Service cost				4						3
Amortization of net actuarial loss	14			3			12			3
Net periodic benefit cost (credit)	$	—		$	9		$	(4	)	$	8		$	2	$	2

Pension expense for 2018 increased versus the same period in 2017 as a result of a lower assumed return on plan assets and an increase in amortization of the net actuarial loss in the U.S., partially offset by lower interest expense. The components of net periodic benefit cost other than the service cost component are included in other expense, net in the consolidated statement of operations.

Plan termination — In October 2017, upon authorization by the Dana Board of Directors, we commenced the process of terminating one of our U.S. defined benefit pension plans. Ultimate plan termination is subject to regulatory approval and to prevailing market conditions and other considerations, including interest rates and annuity pricing. In the event that approvals are received and we proceed with effecting termination, settlement of the plan obligations is expected to occur in the first half of 2019. At December 31, 2017, this plan had benefit obligations of $1,064 and assets of $900. The benefit obligations have been valued at the amount expected to be required to settle the obligations, using assumptions regarding the portion of obligations expected to be settled through participant acceptance of lump sum payments or annuities and the cost to purchase those annuities. The unrecognized actuarial losses of the plan in AOCI totaled $369 at the end of 2017. If the settlement is effected as expected in 2019, the plan's deferred actuarial losses remaining in AOCI at that time will be recognized as expense.