Note 7: Employee Benefit Plans (Details) (USD $)	3 Months Ended		9 Months Ended
	Sep. 30, 2012	Sep. 30, 2011	Sep. 30, 2012	Sep. 30, 2011
Defined Benefit Plan Disclosure [Line Items]
Contributions to Defined Benefit Plans			$ 233,000,000	$ 697,000,000
Business Acquisition Pension And Post Retirement Obligations Assumed	1,500,000,000		1,500,000,000
Pension Plans, Defined Benefit [Member]
Defined Benefit Plan Disclosure [Line Items]
Contributions to Defined Benefit Plans	209,000,000	627,000,000	233,000,000	697,000,000
Contributions to Defined Contribution Plans	65,000,000	52,000,000	183,000,000	165,000,000
Defined Benefit Plan, Service Cost	131,000,000	111,000,000	361,000,000	333,000,000
Defined Benefit Plan, Interest Cost	344,000,000	325,000,000	970,000,000	975,000,000
Defined Benefit Plan, Expected Return on Plan Assets	(503,000,000)	(458,000,000)	(1,415,000,000)	(1,372,000,000)
Defined Benefit Plan, Amortization of Transition Obligations, Assets and Prior Service Cost Credit	(7,000,000)	(2,000,000)	(13,000,000)	(8,000,000)
Defined Benefit Plan, Actuarial Net (Gains) Losses	180,000,000	116,000,000	541,000,000	347,000,000
Defined Benefit Plan, Recognized Net Gain (Loss) Due to Settlements and Curtailments	15,000,000	0	50,000,000	13,000,000
Defined Benefit Plan, Net Periodic Benefit Cost	160,000,000	92,000,000	494,000,000	288,000,000
Discontinued Operations Defined Benefit Plan Recognized Net Gain Loss Due To Settlements And Curtailments	0		24,000,000
Other Postretirement Benefit Plans, Defined Benefit [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Service Cost	1,000,000	1,000,000	3,000,000	3,000,000
Defined Benefit Plan, Interest Cost	10,000,000	9,000,000	26,000,000	29,000,000
Defined Benefit Plan, Expected Return on Plan Assets	0	0	0	0
Defined Benefit Plan, Amortization of Transition Obligations, Assets and Prior Service Cost Credit	(2,000,000)	0	(2,000,000)	(2,000,000)
Defined Benefit Plan, Actuarial Net (Gains) Losses	(1,000,000)	(2,000,000)	(5,000,000)	(6,000,000)
Defined Benefit Plan, Recognized Net Gain (Loss) Due to Settlements and Curtailments	0	0	0	0
Defined Benefit Plan, Net Periodic Benefit Cost	8,000,000	8,000,000	22,000,000	24,000,000
United States Pension Plans Of US Entity Defined Benefit [Member]
Defined Benefit Plan Disclosure [Line Items]
Contributions to Defined Benefit Plans	201,000,000	606,000,000	201,000,000	606,000,000
United States Pension Plans Of US Entity Defined Benefit [Member] | Common Stock [Member]
Defined Benefit Plan Disclosure [Line Items]
Contributions to Defined Benefit Plans		$ 450,000,000		$ 450,000,000