Note 6: Employee Benefit Plans (Details) (USD $) | 3 Months Ended | 9 Months Ended | 3 Months Ended | 9 Months Ended | 3 Months Ended | 9 Months Ended | 3 Months Ended | 9 Months Ended | 3 Months Ended | 9 Months Ended | ||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Sep. 30, 2011 | Sep. 30, 2010 | Sep. 30, 2011 | Sep. 30, 2010 | Sep. 30, 2011
Pension Plans, Defined Benefit [Member] | Sep. 30, 2010
Pension Plans, Defined Benefit [Member] | Sep. 30, 2011
Pension Plans, Defined Benefit [Member] | Sep. 30, 2010
Pension Plans, Defined Benefit [Member] | Sep. 30, 2011
Other Postretirement Benefit Plans, Defined Benefit [Member] | Sep. 30, 2010
Other Postretirement Benefit Plans, Defined Benefit [Member] | Sep. 30, 2011
Other Postretirement Benefit Plans, Defined Benefit [Member] | Sep. 30, 2010
Other Postretirement Benefit Plans, Defined Benefit [Member] | Sep. 30, 2011
United States Pension Plans Of US Entity Defined Benefit [Member] | Sep. 30, 2010
United States Pension Plans Of US Entity Defined Benefit [Member] | Sep. 30, 2011
United States Pension Plans Of US Entity Defined Benefit [Member] | Sep. 30, 2010
United States Pension Plans Of US Entity Defined Benefit [Member] | Sep. 30, 2011
United States Pension Plans Of US Entity Defined Benefit [Member]
Common Stock [Member] | Jun. 30, 2010
United States Pension Plans Of US Entity Defined Benefit [Member]
Common Stock [Member] | Sep. 30, 2011
United States Pension Plans Of US Entity Defined Benefit [Member]
Common Stock [Member] | Sep. 30, 2010
United States Pension Plans Of US Entity Defined Benefit [Member]
Common Stock [Member] | |
| Defined Benefit Plan Disclosure [Line Items] | ||||||||||||||||||||
| Contributions to Defined Benefit Plans | $ 627,000,000 | $ 438,000,000 | $ 697,000,000 | $ 949,000,000 | $ 606,000,000 | $ 350,000,000 | $ 606,000,000 | $ 801,000,000 | $ 450,000,000 | $ 250,000,000 | $ 450,000,000 | $ 250,000,000 | ||||||||
| Contributions to Defined Contribution Plans | 52,000,000 | 46,000,000 | 165,000,000 | 142,000,000 | ||||||||||||||||
| Defined Benefit Plan, Service Cost | 111,000,000 | 99,000,000 | 333,000,000 | 297,000,000 | 1,000,000 | 1,000,000 | 3,000,000 | 2,000,000 | ||||||||||||
| Defined Benefit Plan, Interest Cost | 325,000,000 | 321,000,000 | 975,000,000 | 963,000,000 | 9,000,000 | 11,000,000 | 29,000,000 | 34,000,000 | ||||||||||||
| Defined Benefit Plan, Expected Return on Plan Assets | (458,000,000) | (430,000,000) | (1,372,000,000) | (1,289,000,000) | 0 | 0 | 0 | 0 | ||||||||||||
| Defined Benefit Plan, Amortization of Transition Obligations, Assets and Prior Service Cost Credit | (2,000,000) | (4,000,000) | (8,000,000) | (12,000,000) | 0 | (1,000,000) | (2,000,000) | (2,000,000) | ||||||||||||
| Defined Benefit Plan, Actuarial Net (Gains) Losses | 116,000,000 | 71,000,000 | 347,000,000 | 213,000,000 | (2,000,000) | 0 | (6,000,000) | (1,000,000) | ||||||||||||
| Defined Benefit Plan, Recognized Net Gain (Loss) Due to Settlements and Curtailments | 0 | 0 | 13,000,000 | 17,000,000 | 0 | 0 | 0 | 0 | ||||||||||||
| Defined Benefit Plan, Net Periodic Benefit Cost | $ 92,000,000 | $ 57,000,000 | $ 288,000,000 | $ 189,000,000 | $ 8,000,000 | $ 11,000,000 | $ 24,000,000 | $ 33,000,000 | ||||||||||||