Benefit Plans (Tables)

6 Months Ended

Jun. 30, 2011

Benefit Plans

Schedule of Components of Net Periodic Pension Cost

	For the Six Months  Ended June 30,						For the Three Months  Ended June 30,
	2011			2010			2011			2010
	(in millions)
Service cost	$	38		$	42		$	19		$	21
Interest cost		175			178			88			89
Expected return on plan assets		(211	)		(208	)		(105	)		(104	)
Amortization:
Net loss		86			66			43			33
Prior service cost		7			6			3			3
Net periodic pension cost	$	95		$	84		$	48		$	42

Postretirement Health Costs

	For the Six Months Ended June 30,						For the Three Months Ended June 30,
	2011			2010			2011			2010
	(in millions)
Service cost	$	17		$	17		$	8		$	8
Interest cost		69			71			35			36
Amortization:
Net loss		19			16			10			8
Prior service credit		(11	)		(7	)		(6	)		(3	)
Net postretirement health care costs	$	94		$	97		$	47		$	49