XML 39 R1.htm IDEA: XBRL DOCUMENT v3.10.0.1
Document and Entity Information - shares
6 Months Ended
Jun. 30, 2018
Jul. 31, 2018
Document Information [Line Items]    
Document Type 10-Q  
Amendment Flag false  
Document Period End Date Jun. 30, 2018  
Document Fiscal Year Focus 2018  
Document Fiscal Period Focus Q2  
Entity Registrant Name BERKSHIRE HATHAWAY ENERGY CO  
Entity Central Index Key 0001081316  
Current Fiscal Year End Date --12-31  
Entity Filer Category Non-accelerated Filer  
Entity Common Stock, Shares Outstanding   77,025,044
PacifiCorp [Member]    
Document Information [Line Items]    
Entity Registrant Name PACIFICORP /OR/  
Entity Central Index Key 0000075594  
Current Fiscal Year End Date --12-31  
Entity Filer Category Non-accelerated Filer  
Entity Common Stock, Shares Outstanding   357,060,915
MidAmerican Funding, LLC and Subsidiaries [Domain]    
Document Information [Line Items]    
Entity Registrant Name MIDAMERICAN FUNDING, LLC  
Entity Central Index Key 0001098296  
Current Fiscal Year End Date --12-31  
Entity Filer Category Non-accelerated Filer  
MidAmerican Energy Company [Member]    
Document Information [Line Items]    
Entity Registrant Name MIDAMERICAN ENERGY COMPANY  
Entity Central Index Key 0000928576  
Current Fiscal Year End Date --12-31  
Entity Filer Category Non-accelerated Filer  
Entity Common Stock, Shares Outstanding   70,980,203
Nevada Power Company [Member]    
Document Information [Line Items]    
Entity Registrant Name Nevada Power Company  
Entity Central Index Key 0000071180  
Current Fiscal Year End Date --12-31  
Entity Filer Category Non-accelerated Filer  
Entity Common Stock, Shares Outstanding   1,000
Sierra Pacific Power Company [Member]    
Document Information [Line Items]    
Entity Registrant Name Sierra Pacific Power Company  
Entity Central Index Key 0000090144  
Current Fiscal Year End Date --12-31  
Entity Filer Category Non-accelerated Filer  
Entity Common Stock, Shares Outstanding   1,000