Retirement Benefits (Tables)

12 Months Ended

Dec. 31, 2011

Defined Benefit Plan Disclosure [Line Items]

Reconciliation Of Changes In Pension, Retiree Medical, Other Benefit Obligations And Fair Value Assets


	Pension Benefits						Retiree Medical and Other Benefits
	2011			2010			2011			2010
Reconciliation of benefit obligation
Obligation at January 1	$	12,968		$	12,003		$	3,097		$	2,827
Service cost		386			366			61			60
Interest cost		757			737			174			165
Actuarial (gain) loss		1,237			442			(63	)		263
Plan amendments		-			1			(3	)		(78	)
Benefit payments		(780	)		(581	)		(144	)		(140	)


Obligation at December 31	$	14,568		$	12,968		$	3,122		$	3,097


Reconciliation of fair value of plan assets
Fair value of plan assets at January 1	$	7,773		$	7,051		$	234		$	206
Actual return on plan assets		614			837			(6	)		17
Employer contributions		525			466			121			151
Benefit payments		(780	)		(581	)		(144	)		(140	)


Fair value of plan assets at December 31	$	8,132		$	7,773		$	205		$	234


Funded status at December 31	$	(6,436	)	$	(5,195	)	$	(2,917	)	$	(2,863	)

Schedule Of Amounts Recognized In Consolidated Balance Sheets



Amounts recognized in the consolidated balance sheets
Current liability	$	2	$	8	$	147	$	173
Noncurrent liability		6,434		5,187		2,770		2,690

	$	6,436	$	5,195	$	2,917	$	2,863

Schedule Of Amounts Recognized In Other Comprehensive Loss



Amounts recognized in other comprehensive loss
Net actuarial loss (gain)	$	4,179	$	3,052	$	(181	)	$	(128	)
Prior service cost (credit)		68		81		(179	)		(205	)


	$	4,247	$	3,133	$	(360	)	$	(333	)

Schedule Of Accumulated Benefit Obligations Exceeding Fair Value Of Plan Assets


For plans with accumulated benefit obligations exceeding the fair value of plan assets	Pension Benefits				Retiree Medical and Other Benefits

	2011		2010		2011		2010
Projected benefit obligation (PBO)	$	14,568	$	12,968	$	-	$	-
Accumulated benefit obligation (ABO)		12,935		11,508		-		-
Accumulated postretirement benefit obligation (APBO)		-		-		3,123		3,097
Fair value of plan assets		8,132		7,773		205		234
ABO less fair value of plan assets		4,803		3,735		-		-

Schedule Of Assumption Used Calculating Benefit Obligation


	Pension Benefits						Retiree Medical and Other Benefits
	2011			2010			2011			2010
Weighted-average assumptions used to determine benefit obligations as of December 31
Discount rate		5.20	%		5.80	%		4.89	%		5.69	%
Salary scale (ultimate)		3.78			3.78			-			-


	Pension Benefits						Retiree Medical and Other Benefits
	2011			2010			2011			2010
Weighted-average assumptions used to determine net periodic benefit cost for the years ended December 31
Discount rate		5.80	%		6.10	%		5.69	%		5.90	%
Salary scale (ultimate)		3.78			3.78			-			-
Expected return on plan assets		8.50			8.50			8.50			8.50

Summary Of Target Assets Allocation


Asset Class/Sub-Class	Allowed Range


Equity		60% - 70%
Public:
U.S. Value		18% - 33%
International Value		14% - 24%
Emerging Markets		5% - 11%
Alternative Investments		0% - 18%
Fixed Income		30% - 40%
U.S. Long Duration		30% - 40%

Other		0% - 5%
Cash Equivalents		0% - 5%

Schedule of Fair Values Of Pension Plan Assets By Asset Category


	Fair Value Measurements at December 31, 2011 (in millions)
	Quoted Prices in Active Markets for Identical Assets (Level 1)		Significant Observable Inputs (Level 2)		Significant Unobservable Inputs (Level 3)		Total

Asset Category
Cash and cash equivalents	$	160	$	–	$	–	$	160
Equity securities
International markets (a)(b)		1,939		–		–		1,939
Large-cap companies (b)		1,462		–		–		1,462
Mid-cap companies (b)		221		–		–		221
Small-cap companies(b)		17		–		–		17
Fixed Income
Corporate bonds (c)		–		1,866		–		1,866
Government securities (d)		–		1,205		–		1,205
U.S. municipal securities		–		52		–		52
Alternative investments
Private equity partnerships (e)		–		–		920		920
Common/collective and 103-12 investment trusts (f)		–		172		–		172
Insurance group annuity contracts		–		–		2		2
Dividend and interest receivable		42		–		–		42
Due to/from brokers for sale of securities - net		72		–		–		72
Other assets – net		2		–		–		2

Total	$	3,915	$	3,295	$	922	$	8,132

Holdings are diversified as follows: 22 percent United Kingdom, 10 percent Japan, 9 percent France, 7 percent Switzerland, 6 percent Germany, 5 percent Netherlanpercent in any one country. ds, 5 percent Republic of Korea, 13 percent emerging markets and the remaining 23 percent with no concentration greater than 5 percent in any one country.

There are no significant concentration of holdings by company or industry.

Includes approximately 83 percent investments in corporate debt with a Standard and Poor's (S&P) rating lower than A and 17 percent investments in corporate debt with an S&P rating A or higher. Holdings include 80 percent U.S. companies, 18 percent international companies and 2 percent emerging market companies.

Includes approximately 89 percent investments in domestic government securities and 11 percent in emerging market government securities. There are no significant foreign currency risks within this classification.

Includes limited partnerships that invest primarily in U.S. (92%) and European (8%) buyout opportunities of a range of privately held companies. The Master Trust does not have the right to redeem its limited partnership investment at its net asset value. Instead, the Master Trust receives distributions as the underlying assets are liquidated. It is estimated that the underlying assets of these funds will be gradually liquidated over the next 1 to 10 years. Additionally, the Master Trust has future funding commitments of approximately $335 million over the next 10 years.

Investment includes 71% in an emerging market 103-12 investment trust with investments in emerging country equity securities, 16% in Canadian segregated balanced value, income growth and diversified pooled funds and 13% in a common/collective trust investing in securities of smaller companies located outside the U.S., including developing markets. Requests for withdrawals must meet specific requirements with advance notice of redemption preferred.


	Fair Value Measurements at December 31, 2010 (in millions)
	Quoted Prices in Active Markets for Identical Assets (Level 1)			Significant Observable Inputs (Level 2)			Significant Unobservable Inputs (Level 3)		Total

Asset Category
Cash and cash equivalents	$	269		$	–		$	–	$	269
Equity securities
International markets (a)(b)		2,025			–			–		2,025
Large-cap companies (b)		1,557			–			–		1,557
Mid-cap companies (b)		152			–			–		152
Small-cap companies(b)		37			–			–		37
Fixed Income
Corporate bonds (c)		–			1,593			–		1,593
Government securities (d)		–			1,194			–		1,194
U.S. municipal securities		–			39			–		39
Alternative investments
Private equity partnerships (e)		–			–			795		795
Common/collective and 103-12 investment trusts (f)		–			145			–		145
Interest rate swap contracts – net(g)		–			(74	)		–		(74)
Insurance group annuity contracts		–			–			3		3
Dividend and interest receivable		37			–			–		37
Due to/from brokers for sale of securities—net		(11	)		–			–		(11)
Swap income receivable		8			–			–		8
Other assets – net		4			–			–		4

Total	$	4,078		$	2,897		$	798	$	7,773

Holdings are diversified as follows: 20 percent United Kingdom, 14 percent Japan, 9 percent France, 8 percent Switzerland, 7 percent Germany, 5 percent Netherlands, 11 percent emerging markets and the remaining 26 percent with no concentration greater than 5 percent in any one country.

There are no significant concentration of holdings by company or industry.

Includes approximately 82 percent investments in corporate debt with a Standard and Poor's (S&P) rating lower than A and 18 percent investments in corporate debt with an S&P rating A or higher. Holdings include 81 percent U.S. companies, 16 percent international companies and 3 percent emerging market companies.

Includes approximately 87 percent investments in domestic government securities and 13 percent in emerging market government securities. There are no significant foreign currency risks within this classification.

Investment includes 64% in an emerging market 103-12 investment trust with investments in emerging country equity securities, 19% in Canadian segregated balanced value, income growth and diversified pooled funds and 17% in a common/collective trust investing in securities of smaller companies located outside the U.S., including developing markets. Requests for withdrawals must meet specific requirements with advance notice of redemption preferred.

Includes four interest rate swap agreements with notional value of $760 million and fair value of $75 million representing 99% of the balance.

Changes In Fair Value Measurements Of Level 3 Investments


	Private Equity Partnerships			Insurance Group Annuity Contracts


Beginning balance at December 31, 2010		795		$	3
Actual return on plan assets:
Relating to assets still held at the reporting date		53			-
Relating to assets sold during the period		48			-
Purchases		146
Sales		(122	)		(1)

Ending balance at December 31, 2011	$	920		$	2

Changes in fair value measurements of Level 3 investments during the year ended December 31, 2010, were as follows:


	Private Equity Partnerships			Insurance Group Annuity Contracts


Beginning balance at December 31, 2009	$	744		$	3
Actual return on plan assets:
Relating to assets still held at the reporting date		1			-
Relating to assets sold during the period		69			-
Purchases, sales, settlements (net)		(19	)		-

Ending balance at December 31, 2010	$	795		$	3

Fair Values Of Company's Other Postretirement Benefit Plan Assets


	Fair Value Measurements at December 31, 2011 (in millions)

	Quoted Prices in Active Markets for Identical Assets (Level 1)		Significant Observable Inputs (Level 2)		Significant Unobservable Inputs (Level 3)		Total

Asset Category
Money market fund	$	4	$	–	$	–	$	4
Unitized mutual funds		–		201		–		201

Total	$	4	$	201	$	–	$	205

The fair values of the Company's other postretirement benefit plan assets at December 31, 2010 by asset category were as follows:


	Fair Value Measurements at December 31, 2010 (in millions)
	Quoted Prices in Active Markets for Identical Assets (Level 1)		Significant Observable Inputs (Level 2)		Significant Unobservable Inputs (Level 3)		Total

Asset Category
Money market fund	$	4	$	–	$	–	$	4
Unitized mutual funds		–		230		–		230

Total	$	4	$	230	$	–	$	234

Fair Value Of Investments In Money Market Fund


	2011			2010

Assumed health care trend rates at December 31
Health care cost trend rate assumed for next year		7.50	%		8.0	%
Rate to which the cost trend rate is assumed to decline (the ultimate trend rate)		4.5	%		4.5	%
Year that the rate reaches the ultimate trend rate		2018			2018

Schedule Of One Percentage Point Change In Assumed Health Care Cost Trend Rates


	One Percent Increase	One Percent Decrease

Impact on 2011 service and interest cost	20	(22)
Impact on postretirement benefit obligation as of December 31, 2011	248	(251)

Benefit Payments Of Expected Future Service


	Pension	Retiree Medical and Other


2012	$513	$147
2013	687	155
2014	733	162
2015	813	168
2016	823	178
2017 – 2021	5,337	1,071

Pension Benefits [Member]

Defined Benefit Plan Disclosure [Line Items]

Components Of Net Periodic Benefit Cost


	Pension Benefits
	2011			2010			2009
Components of net periodic benefit cost
Defined benefit plans:
Service cost	$	386		$	366		$	333
Interest cost		757			737			712
Expected return on assets		(657	)		(593	)		(566	)
Amortization of:
Prior service cost		13			13			13
Settlement		-			-			-
Unrecognized net loss		154			154			145


Net periodic benefit cost for defined benefit plans		653			677			637
Defined contribution plans		179			168			168


	$	832		$	845		$	805

Retiree Medical And Other Benefits [Member]

Defined Benefit Plan Disclosure [Line Items]

Components Of Net Periodic Benefit Cost


	Retiree Medical and Other Benefits
	2011			2010			2009
Components of net periodic benefit cost
Service cost	$	61		$	60		$	59
Interest cost		174			165			179
Expected return on assets		(20	)		(18	)		(14	)
Amortization of:
Prior service cost		(28	)		(19	)		(8	)
Unrecognized net loss (gain)		(9	)		(10	)		(14	)


Net periodic benefit cost	$	178		$	178		$	202