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Related Party Transactions (MEC) Related Party Transactions (MEC) (MidAmerican Energy Company [Member])
3 Months Ended
Mar. 31, 2013
MidAmerican Energy Company [Member]
 
Related Party Transaction [Line Items]  
Related Party Transactions Disclosure [Text Block]
(11)
Related Party Transactions

In 2012, MidAmerican Energy signed new long-term rail transportation contracts with BNSF Railway Company ("BNSF"), an affiliate company, and Union Pacific Railroad Company ("UP") for the transportation of coal to all of the MidAmerican Energy-operated coal-fueled generating facilities. These contracts replaced a long-term contract with UP that expired December 31, 2012. For the three-month period ended March 31, 2013, $51 million was incurred for coal transportation services, the majority of which was related to the BNSF agreement. As of March 31, 2013, MidAmerican Energy had accounts payable to BNSF of $5 million.