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Recent Financing Transactions (MEC) (MidAmerican Energy Company [Member])
6 Months Ended
Jun. 30, 2013
MidAmerican Energy Company [Member]
 
Debt Instrument [Line Items]  
Debt Disclosure [Text Block]
(5)
Recent Financing Transactions

In March 2013, MidAmerican Energy replaced its $530 million unsecured revolving credit facility, which had been set to expire in July 2013, with a $600 million unsecured revolving credit facility expiring in March 2018. The new credit facility, which supports MidAmerican Energy's commercial paper program and its variable-rate tax-exempt bond obligations and provides for the issuance of letters of credit, has a variable interest rate based on the London Interbank Offered Rate or a base rate, at MidAmerican Energy's option, plus a spread that varies based on MidAmerican Energy's credit ratings for its senior unsecured long-term debt securities. As of June 30, 2013, MidAmerican Energy had no borrowings outstanding under this credit facility. The credit facility requires that MidAmerican Energy's ratio of consolidated debt, including current maturities, to total capitalization not exceed 0.65 to 1.0 as of the last day of each quarter.