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Property, Plant and Equipment, Net - LLC (Details) - Other Capitalized Property Plant and Equipment [Member] - MidAmerican Funding, LLC and Subsidiaries [Member] - USD ($)
$ in Millions
Dec. 31, 2020
Dec. 31, 2019
Property, Plant and Equipment [Line Items]    
Property, Plant and Equipment, Gross $ 0 $ 3
Accumulated depreciation and amortization $ 0 $ 1