Employee Benefit Plans (Tables)

6 Months Ended

Jun. 30, 2014

Defined Benefit Pension Plans and Defined Benefit Postretirement Plans Disclosure [Abstract]

Periodic benefit cost related to our defined benefit plans, net

The components of net periodic benefit cost related to our defined benefit plans were as follows (in millions) :

	Pension Plans						Other Postretirement Benefit Plans
	2014			2013			2014			2013
Three months ended June 30:
Service cost	$	30		$	35		$	1		$	3
Interest cost	23			22			4			5
Expected return on plan assets	(33		)	(34		)	—			—
Amortization of:
Prior service credit	(5		)	(6		)	(4		)	(3		)
Net actuarial loss	9			15			—			—
Net periodic benefit cost	$	24		$	32		$	1		$	5
Six months ended June 30:
Service cost	$	60		$	71		$	3		$	6
Interest cost	46			44			8			9
Expected return on plan assets	(66		)	(66		)	—			—
Amortization of:
Prior service credit	(10		)	(9		)	(9		)	(6		)
Net actuarial loss	17			29			—			—
Net periodic benefit cost	$	47		$	69		$	2		$	9