PENSION PLANS, RETIREMENT BENEFITS AND SAVINGS PLANS

The following table summarizes the components of net periodic benefit cost for the Company’s pension and postretirement benefit plans recognized in the consolidated statement of income for the three months ended March 31, 2018 and 2017.



	Pension Plans						Postretirement Benefit Plans
(for the three months ended March 31, in millions)	2018			2017			2018			2017

Net Periodic Benefit Cost:
Service cost	$	33		$	30		$	—		$	—

Non-service cost:
Interest cost on benefit obligation	31			31			2			2
Expected return on plan assets	(66		)	(60		)	—			—
Amortization of unrecognized:
Prior service benefit	—			—			(1		)	(1		)
Net actuarial loss	23			18			—			—
Total non-service cost (benefit)	(12		)	(11		)	1			1
Net periodic benefit cost	$	21		$	19		$	1		$	1

The following table indicates the line items in which the respective service costs and non-service benefit costs are presented in the consolidated statement of income for the three months ended March 31, 2018 and 2017.



	Pension Plans						Postretirement Benefit Plans
(for the three months ended March 31, in millions)	2018			2017			2018		2017
Service Cost:
Claims and claim adjustment expenses	$	13		$	12		$	—	$	—
General and administrative expenses	20			18			—		—
Total service cost	33			30			—		—

Non-Service Cost:
Claims and claim adjustment expenses	(5		)	(4		)	—		—
General and administrative expenses	(7		)	(7		)	1		1
Total non-service cost (benefit)	(12		)	(11		)	1		1
Net periodic benefit cost	$	21		$	19		$	1	$	1