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Income Taxes (MEC) (Tables) (MidAmerican Energy Company [Member])
 6 Months Ended
Jun. 30, 2014
MidAmerican Energy Company [Member]
  
Income Taxes [Line Items]  
Schedule of Effective Income Tax Rate Reconciliation [Table Text Block]
A reconciliation of the federal statutory income tax rate to MidAmerican Energy's effective income tax rate applicable to income before income tax benefit is as follows:
 
Three-Month Periods
 
Six-Month Periods
 
Ended June 30,
 
Ended June 30,
 
2014
 
2013
 
2014
 
2013
 
 
 
 
 
 
 
 
Federal statutory income tax rate
35
 %
 
35
 %
 
35
 %
 
35
 %
Income tax credits
(62
)
 
(57
)
 
(55
)
 
(60
)
State income tax, net of federal income tax benefit
(3
)
 
(4
)
 
1

 
(2
)
Effects of ratemaking
(8
)
 
(15
)
 
(5
)
 
(4
)
Other, net
(1
)
 
—

 
(1
)
 
—

Effective income tax rate
(39
)%
 
(41
)%
 
(25
)%
 
(31
)%