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Note 7: Employee Benefit Plans (Tables)
 3 Months Ended
Mar. 31, 2013
Notes to Condensed Consolidated Financial Statements [Abstract]  
Schedule of Defined Benefit Plans Disclosures [Text Block]
 
Pension Benefits
Quarter Ended
March 31,
 
Other Postretirement Benefits
Quarter Ended
March 31,
(Dollars in millions)
2013
 
2012
 
2013
 
2012
Service cost
$
144

 
$
115

 
$
1

 
$
1

Interest cost
343

 
313

 
10

 
8

Expected return on plan assets
(527
)
 
(456
)
 
—

 
—

Amortization
(9
)
 
(3
)
 
(3
)
 
—

Recognized actuarial net loss (gain)
240

 
181

 
(1
)
 
(2
)
Net settlement and curtailment (gain) loss
(3
)
 
28

 
—

 
—

Total net periodic benefit cost
$
188

 
$
178

 
$
7

 
$
7

 
Quarter Ended March 31,
(Dollars in millions)
2013
 
2012
Defined Benefit Plans
$
29

 
$
13

Defined Contribution Plans
$
103

 
$
62