Employee Benefit Plans (Tables)

6 Months Ended

Jun. 30, 2011

Employee Benefit Plans [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 for the three and six months ended June 30, 2011 and 2010 (in millions):

	Pension Plans						Other Postretirement Benefit Plans
	2011			2010			2011			2010
Three months ended June 30:
Service cost	$	22		$	21		$	2		$	2
Interest cost	22			21			5			7
Expected return on plan assets	(28		)	(28		)	—			—
Amortization of:
Prior service cost (credit)	—			—			(5		)	(5		)
Net loss	3			1			1			1
Net periodic benefit cost	$	19		$	15		$	3		$	5
Six months ended June 30:
Service cost	$	45		$	43		$	5		$	5
Interest cost	43			41			11			13
Expected return on plan assets	(56		)	(56		)	—			—
Amortization of:
Prior service cost (credit)	1			1			(11		)	(10		)
Net loss	6			1			1			2
Net periodic benefit cost	$	39		$	30		$	6		$	10