Note 12—Postemployment Benefit Plans

We have several defined benefit pension plans, both funded and unfunded, covering substantially all of our U.S. employees, including certain frozen plans, assumed in connection with our mergers, that cover certain current employees and certain former employees and 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 our employees in those areas (the “Non-U.S. Plans”). Additionally, we offer 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 June 30, 2014											Three months ended June 30, 2013
	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	$	10		$	7		$	—	$	17		$	15		$	7		$	—	$	22
Interest cost	17			8			—		25			16			5			—		21
Expected return on plan assets	(18		)	(8		)	—		(26		)	(17		)	(5		)	—		(22		)
Settlements and curtailments	(6		)	1			—		(5		)	1			—			—		1
Actuarial losses, net	5			1			—		6			13			1			—		14
Prior service cost, net	(1		)	—			—		(1		)	(1		)	—			—		(1		)
Net periodic benefit costs	$	7		$	9		$	—	$	16		$	27		$	8		$	—	$	35

Funding contributions	$	41		$	14		$	—	$	55		$	59		$	3		$	—	$	62

	Six months ended June 30, 2014											Six months ended June 30, 2013
	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	$	21		$	15		$	—	$	36		$	29		$	14		$	—	$	43
Interest cost	34			14			1		49			31			11			1		43
Expected return on plan assets	(37		)	(15		)	—		(52		)	(34		)	(11		)	—		(45		)
Settlements and curtailments	(6		)	1			—		(5		)	1			—			—		1
Actuarial losses, net	10			2			—		12			26			2			—		28
Prior service cost, net	(1		)	—			—		(1		)	(1		)	—			—		(1		)
Net periodic benefit costs	$	21		$	17		$	1	$	39		$	52		$	16		$	1	$	69

Funding contributions	$	42		$	23		$	—	$	65		$	60		$	20		$	1	$	81

In June 2014, we committed to freeze benefits and, as a result, remeasured the funded status 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. We also committed to enhance the benefits under our defined contribution plan in the U.S. These amendments will be effective as of January 1, 2015. As a result, in the three and six months ended June 30, 2014, we reduced the aggregate liability by $78 million and $73 million, respectively, with a corresponding entry to accumulated other comprehensive loss. As of June 30, 2014 and December 31, 2013, our defined benefit pension and other post retirement plans had an aggregate liability of $305 million and $417 million, respectively, representing the aggregate projected benefit obligation, net of the aggregate fair value of plan assets.