6.	Pension and other postretirement plans

The components of net periodic pension cost for the three and nine months ended July 31, 2018 and July 31, 2017 were:

	U.S.						International
Three Months Ended	2018			2017			2018			2017
Service cost	$	3,438		$	3,104		$	510		$	604
Interest cost		3,580			3,180			408			401
Expected return on plan assets		(5,491	)		(5,143	)		(379	)		(334	)
Amortization of prior service cost (credit)		(5	)		12			(80	)		(76	)
Amortization of net actuarial loss		2,353			2,366			527			664
Settlement loss		—			648			—			—
Total benefit cost	$	3,875		$	4,167		$	986		$	1,259

	U.S.						International
Nine Months Ended	2018			2017			2018			2017
Service cost	$	10,314		$	9,346		$	1,548		$	1,763
Interest cost		10,739			9,635			1,241			1,169
Expected return on plan assets		(16,472	)		(15,585	)		(1,152	)		(978	)
Amortization of prior service cost (credit)		(17	)		35			(242	)		(223	)
Amortization of net actuarial loss		7,059			7,150			1,604			1,926
Settlement loss		—			648			—			—
Total benefit cost	$	11,623		$	11,229		$	2,999		$	3,657

The components of other postretirement benefit cost for the three and nine months ended July 31, 2018 and July 31, 2017 were:

	U.S.						International
Three Months Ended	2018			2017			2018			2017
Service cost	$	180		$	188		$	5		$	5
Interest cost		619			576			5			5
Amortization of prior service credit		(24	)		(41	)		—			—
Amortization of net actuarial (gain) loss		264			217			(5	)		(4	)
Total benefit cost	$	1,039		$	940		$	5		$	6


	U.S.						International
Nine Months Ended	2018			2017			2018			2017
Service cost	$	553		$	563		$	15		$	15
Interest cost		1,897			1,728			15			15
Amortization of prior service credit		(74	)		(123	)		—			—
Amortization of net actuarial (gain) loss		809			651			(15	)		(13	)
Total benefit cost	$	3,185		$	2,819		$	15		$	17