Net periodic pension benefit costs for our significant defined benefit plans include the following components:



	U.S. Plans
	Three Months Ended March 31,
	2020			2019
Service cost	$	25		$	21
Interest cost	115			153
Expected return on plan assets	(284		)	(279		)
Amortization of prior service (credit)	(11		)	(11		)
	$	(155	)	$	(116	)



	Non-U.S. Plans
	Three Months Ended March 31,
	2020			2019
Service cost	$	6		$	6
Interest cost	26			36
Expected return on plan assets	(84		)	(84		)
Amortization of prior service (credit)	—			—
	$	(52	)	$	(42	)