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Noncontrolling Interests (LLC) (MidAmerican Funding, LLC and Subsidiaries [Domain])
12 Months Ended
Dec. 31, 2012
MidAmerican Funding, LLC and Subsidiaries [Domain]
 
Noncontrolling Interest [Line Items]  
Noncontrolling Interest Disclosure [Text Block]
(7)
Noncontrolling Interests

Refer to Note 7 of MidAmerican Energy's Notes to Consolidated Financial Statements. Preferred securities of subsidiary are included in noncontrolling interests on the Consolidated Balance Sheets.