Employee Benefit Plans

9 Months Ended

Sep. 30, 2011

Employee Benefit Plans [Abstract]

EMPLOYEE BENEFIT PLANS

8. EMPLOYEE BENEFIT PLANS

The components of net periodic benefit cost related to our defined benefit plans were as follows for the three and nine months ended September 30, 2011 and 2010 (in millions):

	Pension Plans						Other Postretirement Benefit Plans
	2011			2010			2011			2010
Three months ended September 30:
Service cost	$	28		$	22		$	4		$	3
Interest cost	21			21			5			6
Expected return on plan assets	(28		)	(28		)	—			—
Amortization of:
Prior service cost (credit)	1			1			(6		)	(5		)
Net loss	3			—			—			1
Net periodic benefit cost	$	25		$	16		$	3		$	5
Nine months ended September 30:
Service cost	$	73		$	65		$	9		$	8
Interest cost	64			62			16			19
Expected return on plan assets	(84		)	(84		)	—			—
Amortization of:
Prior service cost (credit)	2			2			(17		)	(15		)
Net loss	9			1			1			3
Net periodic benefit cost	$	64		$	46		$	9		$	15

During the nine months ended September 30,2011 and 2010, we contributed $207 million and $54 million, respectively, to our pension plans.