Benefit Plans (Tables)

12 Months Ended

Dec. 31, 2011

Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]

Weighted-Average Assumptions Used To Determine Benefit Obligations

	Pension Benefits						Other Postretirement Benefits
December 31	2011		2010		2009		2011			2010			2009
Discount rate		4.5%		5.3%		5.7%		4.3	%		5.0	%		5.6	%
Expected long term rate of return on plan assets		7.5% to 8.0%		7.5% to 8.0%		7.5% to 8.0%		5.3	%		4.6	%		5.4	%
Rate of compensation increase		4.0% to 5.5%		4.0% to 5.5%		3.0% to 5.5%

Weighted-Average Assumptions Used To Determine Net Periodic Benefit Cost

	Pension Benefits						Other Postretirement Benefits
Year Ended December 31	2011		2010		2009		2011			2010			2009
Discount rate		5.3%		5.7%		6.3%		5.0	%		5.6	%		6.3	%
Expected long term rate of return on plan assets		7.5% to 8.0%		7.5% to 8.0%		7.5% to 8.0%		4.6	%		5.4	%		5.4	%
Rate of compensation increase		4.0% to 5.5%		4.0% to 5.5%		3.0% to 5.8%

Assumed Health Care Cost Trend Rates

December 31	2011		2010		2009
Health care cost trend rate assumed for next year		4.0% to 8.5%		4.0% to 9.0%		4.0% to 9.0%
Rate to which the cost trend rate is assumed to decline (the ultimate trend rate)		4.0% to 5.0%		4.0% to 5.0%		4.0% to 5.0%
Year that the rate reaches the ultimate trend rate		2012-2020		2011-2020		2010-2019

Components Of Net Periodic Benefit Cost

	Pension Benefits									Other Postretirement Benefits
Year Ended December 31	2011			2010			2009			2011			2010			2009
(In millions)
Service cost	$	24		$	26		$	26		$	2		$	2		$	2
Interest cost		164			168			171			6			11			13
Expected return on plan assets		(188	)		(176	)		(156	)		(3	)		(4	)		(2	)
Amortization of unrecognized net (gain) loss		29			28			30			1			2			(15	)
Amortization of unrecognized prior service benefit											(27	)		(24	)		(8	)
Regulatory asset (increase) decrease								(1	)		4			5			5
Net periodic benefit cost	$	29		$	46		$	70		$	(17	)	$	(8	)	$	(5	)

Reconciliation Of Benefit Obligation

	Pension Benefits						Other Postretirement Benefits
	2011			2010			2011			2010
(In millions)
Change in benefit obligation:
Benefit obligation at January 1	$	3,146		$	3,029		$	159		$	221
Service cost		24			26			2			2
Interest cost		164			168			6			11
Plan participants' contributions								7			7
Amendments								(11	)		(60	)
Actuarial (gain) loss		295			104			(15	)		(3	)
Benefits paid from plan assets		(182	)		(180	)		(17	)		(18	)
Foreign exchange					(1	)					(1	)
Reduction of benefit obligations due to disposition of subsidiary		(54	)					(13	)
Benefit obligation at December 31		3,393			3,146			118			159
Change in plan assets:
Fair value of plan assets at January 1		2,468			2,303			73			73
Actual return on plan assets		90			256			11			3
Company contributions		113			90			8			8
Plan participants' contributions								7			7
Benefits paid from plan assets		(182	)		(180	)		(17	)		(18	)
Foreign exchange					(1	)
Reduction of plan assets due to disposition of subsidiary		(54	)
Fair value of plan assets at December 31		2,435			2,468			82			73
Funded status	$	(958	)	$	(678	)	$	(36	)	$	(86	)
Amounts recognized in the Consolidated Balance Sheets consist of:
Other assets				$	7		$	28		$	22
Other liabilities	$	(958	)		(685	)		(64	)		(108	)
Net amount recognized	$	(958	)	$	(678	)	$	(36	)	$	(86	)

Amounts Recognized In Accumulated Other Comprehensive Income (Loss) Not Yet Recognized In Net Periodic (Benefit) Cost

	Pension Benefits				Other Postretirement Benefits
	2011		2010		2011			2010
(In millions)
Amounts recognized in Accumulated other comprehensive income (loss), not yet recognized in net periodic (benefit) cost:
Prior service cost (credit)	$	3	$	3	$	(166	)	$	(181	)
Net actuarial loss		1,174		819		20			45
Net amount recognized	$	1,177	$	822	$	(146	)	$	(136	)
Information for plans with projected and accumulated benefit obligations in excess of plan assets:
Projected benefit obligation	$	3,328	$	3,034
Accumulated benefit obligation		3,218		2,925	$	64		$	108
Fair value of plan assets		2,370		2,349

Estimated Amounts To Be Recognized From Accumulated Other Comprehensive Income Into Net Periodic Benefit Cost

	Pension Benefits		Other   Postretirement     Benefits
(In millions)
Amortization of net actuarial loss	$	47
Amortization of prior service credit				$     (25)
Total estimated amounts to be recognized	$	47		$     (25)

Estimated Future Minimum Benefit Payments

Expected future benefit payments	Pension Benefits		Other Postretirement Benefits
(In millions)
2012	$	203	$	11
2013		208		10
2014		212		10
2015		217		10
2016		224		9
Thereafter		1,175		41
	$	2,239	$	91

Summary Of Stock Option And SAR Transactions

	2011					2010
	Number of Awards			Weighted Average Exercise Price		Number of Awards			Weighted   Average   Exercise   Price
Awards outstanding, January 1		6,104,501		$	33.082		5,657,996		$	31.242
Granted		910,200			39.957		962,850			36.544
Exercised		(370,789	)		25.502		(500,658	)		19.860
Canceled		(19,303	)		34.692		(15,687	)		35.055
Awards outstanding, December 31		6,624,609			34.447		6,104,501			33.082
Awards exercisable, December 31		4,599,587		$	33.405		3,965,726		$	31.501

Summary Of Stock Option And SAR's Outstanding By Exercise Price Range

	Awards Outstanding						Awards Exercisable
Range of exercise prices	Number of Shares		Weighted Average Remaining Contractual Life		Weighted Average Exercise Price		Number of Shares		Weighted Average Exercise Price
$10.01-20.00		803,728		1.2	$	17.868		803,728	$	17.868
20.01-30.00		1,199,098		5.2		24.631		897,641		24.394
30.01-40.00		2,690,208		6.7		36.003		1,506,551		35.418
40.01-50.00		1,720,825		6.5		44.559		1,180,917		45.108
50.01-60.00		210,750		5.1		51.080		210,750		51.080

Assumptions Used In Estimating Fair Value Of Granted Options And SARs And Results

Year Ended December 31	2011			2010			2009
Expected dividend yield		0.6	%		0.7	%		0.9	%
Expected volatility		24.1	%		24.7	%		47.4	%
Weighted average risk-free interest rate		1.7	%		2.0	%		1.9	%
Expected holding period (in years)		5.0			5.0			5.0
Weighted average fair value of awards	$	8.92		$	8.57		$	10.77

Pension Benefits [Member]

Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]

Defined Benefit Plan, Fair Value Of Plan Assets Measured On Recurring Basis

December 31, 2011	Level 1		Level 2		Level 3		Total
(In millions)
Fixed maturity securities:
Corporate and other bonds			$	377	$	10	$	387
States, municipalities and political subdivisions				104				104
Asset-backed				276				276
Total fixed maturity securities	$	-		757		10		767
Equity securities		386		75		5		466
Short term investments		77		35				112
Fixed income mutual funds		98						98
Limited partnerships:
Hedge funds				533		344		877
Private equity						84		84
Total limited partnerships	$	-		533		428		961
Other assets				21				21
Investment contracts with insurance company						10		10
Total	$	561	$	1,421	$	453	$	2,435
December 31, 2010
Fixed maturity securities:
Corporate and other bonds			$	305	$	10	$	315
States, municipalities and political subdivisions				92				92
Asset-backed				230		10		240
Total fixed maturity securities	$	-		627		20		647
Equity securities		452		77		6		535
Short term investments		114		7				121
Fixed income mutual funds		84						84
Limited partnerships:
Hedge funds				563		417		980
Private equity						76		76
Total limited partnerships	$	-		563		493		1,056
Other assets		1		15				16
Investment contracts with insurance company						9		9
Total	$	651	$	1,289	$	528	$	2,468

Plan Assets Measured At Fair Value On A Recurring Basis Using Significant Unobservable Inputs (Level 3)

2011	Balance at January 1,			Actual Return on Assets Still Held at December 31,				Actual Return on Assets Sold during the Year Ended December 31,			Net Purchases, Sales, and Settlements				Net Transfers In (Out) of Level 3			Balance at December 31,
(In millions)
Fixed maturity securities:
Corporate and other bonds		$	10																$	10
Asset-backed			10									$	(10	)
Total fixed maturity securities			20		$	-			$	-			(10	)		$	-			10
Equity securities			6			(1	)													5
Limited partnerships:
Hedge funds			417			5				5			(83	)						344
Private equity			76			10							(2	)						84
Total limited partnerships			493			15				5			(85	)		$	-			428
Investment contracts with insurance company			9			1														10
Total		$	528		$	15			$	5		$	(95	)		$	-		$	453
2010
Fixed maturity securities:
Corporate and other bonds												$	10						$	10
Asset-backed		$	57						$	6			(53	)						10
Total fixed maturity securities			57		$	-				6			(43	)		$	-			20
Equity securities			5			1														6
Limited partnerships:
Hedge funds			360			67				1			(11	)						417
Private equity			72			8							(4	)						76
Total limited partnerships			432			75				1			(15	)		$	-			493
Investment contracts with insurance company			9																	9
Total		$	503		$	76			$	7		$	(58	)		$	-		$	528

Other Postretirement Benefits [Member]

Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]

Defined Benefit Plan, Fair Value Of Plan Assets Measured On Recurring Basis

December 31, 2011	Level 1		Level 2		Level 3		Total
(In millions)
Fixed maturity securities:
Corporate and other bonds			$	20			$	20
States, municipalities and political subdivisions				35				35
Asset-backed				20				20
Total fixed maturity securities	$	-		75	$	-		75
Short term investments		3						3
Fixed income mutual funds		4						4
Total	$	7	$	75	$	-	$	82
December 31, 2010
Fixed maturity securities:
Corporate and other bonds			$	18			$	18
States, municipalities and political subdivisions				33				33
Asset-backed				8				8
U.S. Treasury and obligations of government - sponsored enterprises	$	8						8
Total fixed maturity securities		8		59	$	-		67
Equity securities		3						3
Short term investments		3						3
Total	$	14	$	59	$	-	$	73

Plan Assets Measured At Fair Value On A Recurring Basis Using Significant Unobservable Inputs (Level 3)

2010	Balance at January 1,	Actual Return on Assets Still Held at December 31,	Actual Return on Assets Sold during the Year Ended December 31,	Net Purchases, Sales, and Settlements	Net Transfers In (Out) of Level 3	Balance at December 31,
(In millions)
Limited partnerships	$    16		$    1	$    (17)
Total	$    16	$    -	$    1	$    (17)	$    -	$    -