Employee Benefit Plans (Tables)

12 Months Ended

Dec. 31, 2011

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

Schedule of Defined Benefit Plans Disclosures [Table Text Block]

Benefit Obligations, Fair Value of Plan Assets, and Funded Status

	Pension Benefits						Other Postretirement and Postemployment Benefits
	December 31,						December 31,
(in millions)	2011			2010			2011			2010
Benefit obligation at beginning of period	$	17,506		$	17,031		$	3,298		$	3,427
Service cost	—			—			52			58
Interest cost	969			982			180			196
Actuarial loss (gain)	1,860			570			311			(115		)
Benefits paid, including lump sums and annuities	(1,042		)	(1,013		)	(328		)	(333		)
Participant contributions	—			—			54			59
Plan amendments	—			—			—			6
Special termination benefits	—			—			3			—
Settlements	—			(64		)	—			—
Benefit obligation at end of period(1)	$	19,293		$	17,506		$	3,570		$	3,298
Fair value of plan assets at beginning of period	$	8,249		$	7,623		$	1,120		$	1,153
Actual (loss) gain on plan assets	(16		)	975			(37		)	140
Employer contributions	598			728			235			171
Participant contributions	—			—			54			59
Benefits paid, including lump sums and annuities	(1,042		)	(1,013		)	(400		)	(403		)
Settlements	—			(64		)	—			—
Fair value of plan assets at end of period	$	7,789		$	8,249		$	972		$	1,120
Funded status at end of period	$	(11,504	)	$	(9,257	)	$	(2,598	)	$	(2,178	)

⁽¹⁾  At each period-end presented, our accumulated benefit obligations for our pension plans are equal to the benefit obligations shown above.

Schedule of Amounts Recognized in Balance Sheet [Table Text Block]

Balance Sheet Position

	Pension Benefits						Other Postretirement and Postemployment Benefits
	December 31,						December 31,
(in millions)	2011			2010			2011			2010
Current liabilities	$	(16	)	$	(13	)	$	(137	)	$	(144	)
Noncurrent liabilities	(11,488		)	(9,244		)	(2,460		)	(2,034		)
Total liabilities	$	(11,504	)	$	(9,257	)	$	(2,597	)	$	(2,178	)
Net actuarial (loss) gain	$	(5,844	)	$	(3,299	)	$	(406	)	$	44
Prior service cost	—			—			(5		)	(3		)
Total accumulated other comprehensive (loss) income, pretax	$	(5,844	)	$	(3,299	)	$	(411	)	$	41

Schedule of Net Benefit Costs [Table Text Block]

Net Periodic Cost

	Pension Benefits									Other Postretirement and Postemployment Benefits
	Year Ended December 31,									Year Ended December 31,
(in millions)	2011			2010			2009			2011			2010			2009
Service cost	$	—		$	—		$	—		$	52		$	58		$	53
Interest cost	969			982			1,002			180			196			207
Expected return on plan assets	(724		)	(677		)	(615		)	(90		)	(90		)	(79		)
Amortization of prior service benefit	—			—			—			(3		)	(4		)	18
Recognized net actuarial loss (gain)	55			48			33			(11		)	(4		)	(18		)
Settlements	—			14			9			—			—			—
Special termination benefits	—			—			—			—			—			6
Net periodic cost	$	300		$	367		$	429		$	128		$	156		$	187
Defined contribution plan costs	377			334			306			—			—			—
Total cost	$	677		$	701		$	735		$	128		$	156		$	187

Schedule of Assumptions Used [Table Text Block]

We used the following actuarial assumptions to determine our benefit obligations and our net periodic cost for the periods presented:

	December 31,
Benefit Obligations(1)(2)	2011		2010
Weighted average discount rate	4.94	%	5.69	%

	Year Ended December 31,
Net Periodic Cost(2)(4)	2011		2010		2009
Weighted average discount rate - pension benefit	5.70	%	5.93	%	6.49	%
Weighted average discount rate - other postretirement benefit	5.55	%	5.75	%	6.46	%
Weighted average discount rate - other postemployment benefit	5.63	%	5.88	%	6.50	%
Weighted average expected long-term rate of return on plan assets	8.93	%	8.82	%	8.83	%
Assumed healthcare cost trend rate(3)	7.00	%	7.50	%	8.00	%

⁽¹⁾  Our 2011 and 2010 benefit obligations are measured using a mortality table projected to 2015 and 2013, respectively.

⁽²⁾  Future compensation levels do not impact our frozen defined benefit pension plans or other postretirement plans and impact only a small portion of our other postemployment liability.

⁽³⁾  Assumed healthcare cost trend rate at December 31, 2011 is assumed to decline gradually to 5.00% by 2020 and remain level thereafter.

⁽⁴⁾  Our assumptions reflect various remeasurements of certain portions of our obligations and represent the weighted average of the assumptions used for each measurement date.

Schedule of Effect of One-Percentage-Point Change in Assumed Health Care Cost Trend Rates [Table Text Block]

A 1% change in the healthcare cost trend rate used in measuring the accumulated plan benefit obligation for these plans at December 31, 2011, would have the following effects:

(in millions)	1% Increase		1% Decrease
Increase (decrease) in total service and interest cost	$	5	$	(5	)
Increase (decrease) in the accumulated plan benefit obligation	$	63	$	(69	)

Schedule of Allocation of Plan Assets [Table Text Block]

The weighted-average target and actual asset allocations for the plans are as follows:

	December 31, 2011
	Target	Actual
Diversified fixed income	22%	23%
Domestic equity securities	21	20
Alternative investments	20	23
Non-U.S. developed equity securities	20	18
Non-U.S. emerging equity securities	6	5
Hedge funds	5	5
Cash equivalents	5	4
High yield fixed income	1	2
Total	100%	100%

Schedule of Expected Benefit Payments [Table Text Block]

The following table summarizes, the benefit payments that are scheduled to be paid in the years ending December 31:

(in millions)	Pension Benefits		Other Postretirement and Postemployment Benefits
2012	$	1,060	$	264
2013	1,070		263
2014	1,080		261
2015	1,097		261
2016	1,116		264
2017-2021	5,925		1,394