Retirement Benefits (Tables)

12 Months Ended

Dec. 31, 2011

RETIREMENT BENEFITS [Abstract]

Components of net periodic benefit cost

	Year Ended December 31
	Pension Benefits												Medical and Life Benefits
$ in millions	2011				2010				2009				2011				2010				2009
Components of Net Periodic Benefit Cost
Service cost		$	520			$	531			$	547			$	32			$	34			$	34
Interest cost			1,223				1,212				1,180				114				117				124
Expected return on plan assets			(1,690	)			(1,517	)			(1,366	)			(62	)			(56	)			(48	)
Amortization of:
Prior service cost (credit)			23				35				34				(51	)			(51	)			(51	)
Net loss from previous years			162				206				289				17				18				19
Other											21				(6	)
Net periodic benefit cost		$	238			$	467			$	705			$	44			$	62			$	78

Changes in unamortized benefit plan costs

	Pension				Medical and
$ in millions	Benefits				Life Benefits				Total
Changes in unamortized benefit plan costs
Change in net actuarial loss		$	(524	)		$	(60	)		$	(584	)
Change in prior service cost			5								5
Amortization of
Prior service (cost) credit			(50	)			59				9
Net loss from previous years			(337	)			(28	)			(365	)
Tax expense related to above items			363				11				374
Change in unamortized benefit plan costs – 2009		$	(543	)		$	(18	)		$	(561	)
Change in net actuarial loss		$	(158	)		$	(64	)		$	(222	)
Amortization of
Prior service (cost) credit			(48	)			60				12
Net loss from previous years			(244	)			(26	)			(270	)
Tax expense related to above items			171				12				183
Change in unamortized benefit plan costs – 2010		$	(279	)		$	(18	)		$	(297	)
Change in net actuarial loss		$	2,687			$	138			$	2,825
Change in prior service cost			(608	)			6				(602	)
Amortization of
Prior service (cost) credit			(23	)			51				28
Net loss from previous years			(162	)			(17	)			(179	)
Tax benefit related to above items			(752	)			(71	)			(823	)
Change in unamortized benefit plan costs – 2011		$	1,142			$	107			$	1,249

Amounts recorded in accumulated other comprehensive loss

	Pension								Medical and Life
	Benefits								Benefits
$ in millions	2011				2010				2011				2010
Amounts Recorded in Accumulated Other Comprehensive Loss
Net actuarial loss		$	(6,131	)		$	(4,246	)		$	(331	)		$	(361	)
Prior service (cost) credit			537				(194	)			149				238
Income tax benefits related to above items			2,215				1,752				74				49
Unamortized benefit plan costs		$	(3,379	)		$	(2,688	)		$	(108	)		$	(74	)

Change in Projected Benefit Obligation

	Pension Benefits								Medical and Life Benefits
$ in millions	2011				2010				2011				2010
Change in Projected Benefit Obligation
Projected benefit obligation at beginning of year		$	21,820			$	20,661			$	2,104			$	2,104
Service cost			520				531				32				34
Interest cost			1,223				1,212				114				117
Plan participants’ contributions			14				10				82				82
Plan amendments			(608	)							6
Actuarial loss (gain)			2,379				633				107				(27	)
Benefits paid			(1,197	)			(1,176	)			(224	)			(222	)
Other			(22	)			(51	)			14				16
Projected benefit obligation at end of year		$	24,129			$	21,820			$	2,235			$	2,104

Amounts recognized in the consolidated statements of financial position

	Pension Benefits								Medical and Life Benefits
$ in millions	2011				2010				2011				2010
Change in Plan Assets
Fair value of plan assets at beginning of year		$	20,081			$	18,184			$	932			$	843
Gain on plan assets			1,342				2,320				31				108
Employer contributions			1,084				789				111				105
Plan participants’ contributions			14				10				82				82
Benefits paid			(1,197	)			(1,176	)			(224	)			(222	)
Other			16				(46	)			14				16
Fair value of plan assets at end of year			21,340				20,081				946				932
Funded status		$	(2,789	)		$	(1,739	)		$	(1,289	)		$	(1,172	)
Amounts Recognized in the Consolidated Statements of Financial Position
Non-current assets		$	112			$	275			$	41			$	45
Current liability			(104	)			(94	)			(48	)			(48	)
Non-current liability			(2,797	)			(1,920	)			(1,282	)			(1,169	)

Amounts expected to be Recognized in 2012 Net Periodic Benefit Cost

$ in millions	Pension Benefits				Medical and Life Benefits
Amounts Expected to be Recognized in 2012 Net Periodic Benefit Cost
Net actuarial loss		$	427			$	21
Prior service cost (credit)			(58	)			(51	)

Pension plans with accumulated benefit obligations in excess of fair value of plan assets

	December 31
$ in millions	2011			2010
Projected benefit obligation		$	22,451		$	5,897
Accumulated benefit obligation			21,949			5,314
Fair value of plan assets			19,550			4,447

Weighted-average plan assumptions

	Pension Benefits						Medical and     Life Benefits
	2011			2010			2011			2010
Assumptions Used to Determine Benefit Obligation at December 31
Discount rate		5.03	%		5.75	%		5.02	%		5.62	%
Rate of compensation increase		2.75	%		3.50	%
Initial health care cost trend rate assumed for the next year								7.50	%		8.00	%
Rate to which the cost trend rate is assumed to decline (the ultimate trend rate)								5.00	%		5.00	%
Year that the rate reaches the ultimate trend rate								2017			2017
Assumptions Used to Determine Benefit Cost for the Year Ended December 31
Discount rate		5.75	%		6.03	%		5.62	%		5.77	%
Expected long-term return on plan assets		8.50	%		8.50	%		6.86	%		6.90	%
Rate of compensation increase		3.50	%		3.75	%
Initial health care cost trend rate assumed for the next year								8.00	%		7.00	%
Rate to which the cost trend rate is assumed to decline (the ultimate trend rate)								5.00	%		5.00	%
Year that the rate reaches the ultimate trend rate								2017			2014

Effect of one-percentage point change in assumed health care cost trend rates

$ in millions	1-Percentage- Point Increase			1-Percentage- Point Decrease
Increase (Decrease) From Change In Health Care Cost Trend Rates To
Post-retirement benefit expense		$	5		$	(6	)
Post-retirement benefit liability			64			(75	)

Plan asset allocation ranges

	Asset Allocation Ranges
Domestic equities	10% -30%
International equities	5% - 25%
Fixed income securities	30% -50%
Real estate and other	15% -30%

Plan assets by fair value measurement input

	Level 1						Level 2						Level 3						Total
$ in millions	2011			2010			2011			2010			2011			2010			2011			2010
Asset Category
Domestic equities		$	3,849		$	3,948		$	1		$	3		$	2		$	2		$	3,852		$	3,953
International equities			1,266			1,406			1,716		$	1,868									2,982			3,274
Fixed income securities
Cash and cash equivalents (1)			75			92			1,528			1,111									1,603			1,203
U.S. Treasuries									1,872			1,381									1,872			1,381
Other U.S. Government Agency Securities									965			715									965			715
Non-U.S. Government Securities									324			224									324			224
Corporate debt									3,686			3,512									3,686			3,512
Asset backed									525			758			4			4			529			762
High yield debt									977			992			41			78			1,018			1,070
Bank loans									150			115									150			115
Real estate and other
Hedge funds															1,405			1,521			1,405			1,521
Private equities															2,098			1,945			2,098			1,945
Real estate															1,788			1,402			1,788			1,402
Other (2)							14			(64)									14			(64)
Fair value of plan assets at the end of the year		$	5,190		$	5,446		$	11,758		$	10,615		$	5,338		$	4,952		$	22,286		$	21,013

Changes in fair value of plan assets, significant unobservable inputs

$ in millions	Domestic equities				Asset Backed			High yield debt				Hedge funds				Private equities				Real Estate				Total
Balance as of December 31, 2009		$	2			$	4		$	59			$	1,282			$	1,651			$	870			$	3,868
Actual return on plan assets:
Assets still held at reporting date			2							18				120				200				103				443
Assets sold during the period																						(9	)			(9	)
Purchases, sales, and settlements			(2	)										89				63				405				555
Changes in asset allocation mix										1				30				31				33				95
Balance as of December 31, 2010		$	2			$	4		$	78			$	1,521			$	1,945			$	1,402			$	4,952
Actual return on plan assets:
Assets still held at reporting date										(2	)			(43	)			19				198				172
Assets sold during the period														25				(13	)			(4	)			8
Purchases										10				413				503				460				1,386
Sales										(45	)			(511	)			(356	)			(268	)			(1,180	)
Balance as of December 31, 2011		$	2			$	4		$	41			$	1,405			$	2,098			$	1,788			$	5,338

Estimated benefit payments

$ in millions	Pension Plans			Medical and Life Plans
Year Ending December 31
2012		$	1,179		$	148
2013			1,243			153
2014			1,317			157
2015			1,383			161
2016			1,443			164
2017 through 2021			8,147			845