Benefit Plans (Tables)

6 Months Ended

Jun. 30, 2012

General Discussion of Pension and Other Postretirement Benefits [Abstract]

Schedule Of Components Of Net Periodic Pension Cost

	For the Six Months Ended June 30,						For the Three Months Ended June 30,
	2012			2011			2012			2011
	(in millions)
Service cost	$	40		$	38		$	20		$	19
Interest cost	172			175			86			88
Expected return on plan assets	(221		)	(211		)	(110		)	(105		)
Amortization:
Net loss	112			86			56			43
Prior service cost	5			7			2			3
Net periodic pension cost	$	108		$	95		$	54		$	48

Postretirement Health Care Costs

	For the Six Months Ended June 30,						For the Three Months Ended June 30,
	2012			2011			2012			2011
	(in millions)
Service cost	$	11		$	17		$	6		$	8
Interest cost	60			69			30			35
Amortization:
Net loss	24			19			12			10
Prior service credit	(23		)	(11		)	(12		)	(6		)
Curtailment gain	(26		)	—			—			—
Net postretirement health care costs	$	46		$	94		$	36		$	47