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Property, Plant and Equipment, Net Property, Plant and Equipment, Net - MidAmerican Funding (Details) - MidAmerican Funding, LLC and Subsidiaries [Domain] - Other assets - USD ($)
$ in Millions
Jun. 30, 2019
Dec. 31, 2018
Property, Plant and Equipment [Line Items]    
Property, Plant and Equipment, Gross $ 24 $ 24
Accumulated Depreciation, Depletion and Amortization, Property, Plant, and Equipment $ (13) $ (12)