XML 37 R1.htm IDEA: XBRL DOCUMENT v3.10.0.1
Document and Entity Information - shares
9 Months Ended
Sep. 30, 2018
Oct. 31, 2018
Document Information [Line Items]    
Document Type 10-Q  
Amendment Flag false  
Document Period End Date Sep. 30, 2018  
Document Fiscal Year Focus 2018  
Document Fiscal Period Focus Q3  
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   76,996,944
Entity Emerging Growth Company false  
Entity Small Business false  
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
Entity Emerging Growth Company false  
Entity Small Business false  
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  
Entity Emerging Growth Company false  
Entity Small Business false  
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
Entity Emerging Growth Company false  
Entity Small Business false  
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
Entity Emerging Growth Company false  
Entity Small Business false  
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
Entity Emerging Growth Company false  
Entity Small Business false