Pension and Other Benefit Programs

6 Months Ended

Jun. 30, 2015

Compensation and Retirement Disclosure [Abstract]

Pension and Other Benefit Programs

Pension and Other Benefit Programs

The following table provides the components of net periodic expense (benefit) associated with our pension plans, supplemental executive retirement, or SERP, plans and post-retirement benefit plans for the six months and three months endedJune 30, 2015 and 2014 in the accompanying consolidated statements of income (in millions):

	Six Months Ended June 30, 2015							Six Months Ended June 30, 2014
	Pension Plans			SERP Plans		Post-retirement Benefit Plans		Pension Plans			SERP Plans		Post-retirement Benefit Plans
Service costs	$	—		$	—	$	—	$	2		$	—	$	—
Interest costs	16			2		4		18			2		4
Estimated return on plan assets	(22		)	—		—		(24		)	—		—
Amortization of loss	2			—		—		—			—		—
Net periodic expense (benefit)	$	(4	)	$	2	$	4	$	(4	)	$	2	$	4
	Three Months Ended June 30, 2015							Three Months Ended June 30, 2014
	Pension Plans			SERP Plans		Post-retirement Benefit Plans		Pension Plans			SERP Plans		Post-retirement Benefit Plans
Service costs	$	—		$	—	$	—	$	1		$	—	$	—
Interest costs	8			1		2		9			1		2
Estimated return on plan assets	(11		)	—		—		(12		)	—		—
Amortization of loss	1			—		—		—			—		—
Net periodic expense (benefit)	$	(2	)	$	1	$	2	$	(2	)	$	1	$	2

During the six months and three months endedJune 30, 2015, we contributed $8 million and $4 million, respectively, to our pension plans, SERP plans and post-retirement benefit plans. Based on current actuarial assumptions, we anticipate funding an additional $24 million to our pension plans, SERP plans and post-retirement benefit plans during second half of 2015.