Note 12—Postemployment Benefit Plans

Defined benefit pension plans and other postretirement employee benefit plans

Effective January 1, 2015, we froze benefits of our qualified defined benefit pension plan in the U.S., which covers substantially all U.S. employees, and one of our unfunded supplemental benefit plans. Including these plans, we have several frozen defined benefit pension plans, both funded and unfunded, that cover certain current and former U.S. employees and certain former directors of our predecessors (the “U.S. Plans”). We also have various defined benefit plans in the U.K., Norway, Nigeria, Egypt and Indonesia that cover certain current and former employees in those areas (the “Non-U.S. Plans”). Additionally, we maintain several unfunded contributory and noncontributory other postretirement employee benefit plans covering substantially all of our U.S. employees (the “OPEB Plans”).

The components of net periodic benefit costs, before tax, and funding contributions for these plans were as follows (in millions):

	Three months ended March 31, 2015											Three months ended March 31, 2014
	U.S. Plans			Non-U.S. Plans			OPEB Plans		Total			U.S. Plans			Non-U.S. Plans			OPEB Plans		Total
Net periodic benefit costs
Service cost	$	1		$	7		$	—	$	8		$	11		$	8		$	—	$	19
Interest cost	16			5			1		22			17			6			1		24
Expected return on plan assets	(22		)	(6		)	—		(28		)	(19		)	(7		)	—		(26		)
Actuarial losses, net	3			2			—		5			5			1			—		6
Net periodic benefit costs	$	(2	)	$	8		$	1	$	7		$	14		$	8		$	1	$	23

Funding contributions	$	—		$	9		$	2	$	11		$	1		$	9		$	—	$	10