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Short-Term Debt and Credit Faciliites (Details)
£ in Millions, $ in Millions, $ in Millions
Dec. 31, 2018
USD ($)
Dec. 31, 2018
GBP (£)
Dec. 31, 2018
CAD ($)
Dec. 31, 2017
USD ($)
Dec. 31, 2016
USD ($)
Dec. 31, 2015
USD ($)
Dec. 31, 2014
USD ($)
Line of Credit Facility [Line Items]              
Line of Credit Facility, Maximum Borrowing Capacity [1] $ 9,114     $ 9,051      
Line of Credit Facility, Amounts Supported [1] (543)     (594)      
Short-term Debt [1] (2,516)     (4,488)      
Berkshire Hathaway Energy [Member]              
Line of Credit Facility [Line Items]              
Line of Credit Facility, Maximum Borrowing Capacity 3,500 [2]     3,600      
Letters of Credit Outstanding, Amount 115     96      
Line of Credit Facility, Amounts Supported 0     (7)      
Short-term Debt $ (983)     $ (3,331)      
Berkshire Hathaway Energy [Member] | Line of Credit [Member]              
Line of Credit Facility [Line Items]              
Debt, Weighted Average Interest Rate 2.76% 2.76% 2.76% 1.74%      
Debt to capitalization ratio 0.70 0.70 0.70        
Berkshire Hathaway Energy [Member] | Letter of Credit [Member]              
Line of Credit Facility [Line Items]              
Line of Credit Facility, Amounts Supported       $ (7)      
PacifiCorp [Member]              
Line of Credit Facility [Line Items]              
Line of Credit Facility, Maximum Borrowing Capacity $ 1,200 [2]     1,000      
Line of Credit Facility, Amounts Supported (89)     (130)      
Short-term Debt $ (30)     $ (80) $ (270) $ (20) $ (20)
PacifiCorp [Member] | Line of Credit [Member]              
Line of Credit Facility [Line Items]              
Debt, Weighted Average Interest Rate 2.85% 2.85% 2.85% 1.83%      
Debt to capitalization ratio 0.65 0.65 0.65        
MidAmerican Energy Company and Subsidiaries [Member]              
Line of Credit Facility [Line Items]              
Line of Credit Facility, Maximum Borrowing Capacity $ 1,305     $ 905      
Line of Credit Facility, Amounts Supported (370)     (370)      
Short-term Debt $ (240)     0      
MidAmerican Energy Company and Subsidiaries [Member] | Line of Credit [Member]              
Line of Credit Facility [Line Items]              
Debt to capitalization ratio 0.65 0.65 0.65        
MidAmerican Funding [Member]              
Line of Credit Facility [Line Items]              
Line of Credit Facility, Maximum Borrowing Capacity $ 1,309 [2]     909      
Line of Credit Facility, Amounts Supported (370)     (370)      
Short-term Debt $ (240)     0      
MidAmerican Funding [Member] | Line of Credit [Member]              
Line of Credit Facility [Line Items]              
Debt, Weighted Average Interest Rate 2.49% 2.49% 2.49%        
Debt to capitalization ratio 0.65 0.65 0.65        
Sierra Pacific Power Company [Member]              
Line of Credit Facility [Line Items]              
Line of Credit Facility, Maximum Borrowing Capacity $ 250     250      
Line of Credit Facility, Amounts Supported (80)     (80)      
Northern Powergrid Holdings [Member]              
Line of Credit Facility [Line Items]              
Line of Credit Facility, Maximum Borrowing Capacity 231 [2]     203      
Line of Credit Facility, Amounts Supported 0     0      
Short-term Debt $ (77)     $ 0      
AltaLink, L.P. [Member] | Line of Credit [Member]              
Line of Credit Facility [Line Items]              
Debt, Weighted Average Interest Rate 2.26% 2.26% 2.26% 1.42%      
Debt to capitalization ratio 0.75 0.75 0.75        
Short-term Debt $ (281)     $ (121)      
ALP Investments [Member] | Line of Credit [Member]              
Line of Credit Facility [Line Items]              
Debt, Weighted Average Interest Rate 3.25% 3.25% 3.25% 2.40%      
Debt to capitalization ratio 0.8 0.8 0.8        
Short-term Debt $ (64)     $ (224)      
EBITDA to interest expense ratio 2.25 2.25 2.25        
ALP Investments [Member] | Letter of Credit [Member]              
Line of Credit Facility [Line Items]              
Line of Credit Facility, Maximum Borrowing Capacity     $ 10        
HomeServices [Member]              
Line of Credit Facility [Line Items]              
Short-term Debt $ (404)     (292)      
BHE Renewables [Member]              
Line of Credit Facility [Line Items]              
Letters of Credit Outstanding, Amount 103     $ 118      
Unsecured credit facility, $600 million, expiring June 2021, extended [Member] | PacifiCorp [Member] | Line of Credit [Member]              
Line of Credit Facility [Line Items]              
Line of Credit Facility, Maximum Borrowing Capacity $ 600            
Unsecured credit facility, £150 million, expiring April 2020 [Member] | Northern Powergrid Holdings [Member] | Line of Credit [Member]              
Line of Credit Facility [Line Items]              
Line of Credit Facility, Maximum Borrowing Capacity | £   £ 150          
Debt to regulated asset value 0.8 0.8 0.8        
Interest Coverage Ratio 2.5 2.5 2.5        
Unsecured credit facility, £150 million, expiring April 2020 [Member] | Northern Powergrid (Northeast) Limited [Member] | Line of Credit [Member]              
Line of Credit Facility [Line Items]              
Debt to regulated asset value 0.65 0.65 0.65        
Unsecured credit facility, £150 million, expiring April 2020 [Member] | Northern Powergrid (Yorkshire) plc [Member] | Line of Credit [Member]              
Line of Credit Facility [Line Items]              
Debt to regulated asset value 0.65 0.65 0.65        
Unsecured credit facility, $600 million, expiring June 2021, increased and extended [Member] | PacifiCorp [Member] | Line of Credit [Member]              
Line of Credit Facility [Line Items]              
Line of Credit Facility, Maximum Borrowing Capacity $ 600            
Unsecured credit facility, $900 million, expiring June 2021 [Member] | MidAmerican Energy Company and Subsidiaries [Member] | Line of Credit [Member]              
Line of Credit Facility [Line Items]              
Line of Credit Facility, Maximum Borrowing Capacity 900            
Unsecured credit facility, $400 million, expiring November 2019 [Member] | MidAmerican Funding [Member] | Line of Credit [Member]              
Line of Credit Facility [Line Items]              
Line of Credit Facility, Maximum Borrowing Capacity 400            
Unsecured credit facility, $3.5 billion, expiring June 2021 [Member] | Berkshire Hathaway Energy [Member] | Line of Credit [Member]              
Line of Credit Facility [Line Items]              
Line of Credit Facility, Maximum Borrowing Capacity 3,500            
Unsecured credit facility, $600 million, expiring September 2022 [Member] | HomeServices [Member] | Line of Credit [Member]              
Line of Credit Facility [Line Items]              
Line of Credit Facility, Maximum Borrowing Capacity $ 600            
Debt, Weighted Average Interest Rate 3.94% 3.94% 3.94% 2.75%      
Unsecured credit facility, $985 million, expiring January 2019 to December 2019 [Member] | HomeServices [Member] | Line of Credit [Member]              
Line of Credit Facility [Line Items]              
Line of Credit Facility, Maximum Borrowing Capacity $ 985            
Debt, Weighted Average Interest Rate 4.42% 4.42% 4.42%        
Short-term Debt $ (436)            
Unsecured credit facility, $1 billion, expiring January 2018 to December 2018 [Member] | HomeServices [Member] | Line of Credit [Member]              
Line of Credit Facility [Line Items]              
Line of Credit Facility, Maximum Borrowing Capacity       $ 1,000      
Debt, Weighted Average Interest Rate       3.60%      
Short-term Debt       $ (440)      
Secured credit facility, C$500 million, expiring December 2023 [Member] | AltaLink, L.P. [Member] | Line of Credit [Member]              
Line of Credit Facility [Line Items]              
Line of Credit Facility, Maximum Borrowing Capacity     $ 500        
Secured credit facility, C$75 million, expiring December 2023 [Member] | AltaLink, L.P. [Member] | Line of Credit [Member]              
Line of Credit Facility [Line Items]              
Line of Credit Facility, Maximum Borrowing Capacity     75        
Unsecured credit facility, C$300 million, expiring December 2023 [Member] | ALP Investments [Member] | Line of Credit [Member]              
Line of Credit Facility [Line Items]              
Line of Credit Facility, Maximum Borrowing Capacity     $ 300        
Line of Credit [Member] | Secured credit facility, $250 million, expiring June 2021 [Member] | Sierra Pacific Power Company [Member]              
Line of Credit Facility [Line Items]              
Line of Credit Facility, Maximum Borrowing Capacity $ 250            
Debt to capitalization ratio 0.65 0.65 0.65        
Line of Credit [Member] | Senior unsecured credit facility, $400 million, expiring June 2020 [Member] | Nevada Power Company [Member]              
Line of Credit Facility [Line Items]              
Line of Credit Facility, Maximum Borrowing Capacity $ 400            
Debt to capitalization ratio 1.00 1.00 1.00        
Line of Credit [Member] | Secured credit facility, $400 million, expiring June 2021 [Member] | Nevada Power Company [Member]              
Line of Credit Facility [Line Items]              
Line of Credit Facility, Maximum Borrowing Capacity $ 400            
Debt to capitalization ratio 0.65 0.65 0.65        
[1] (1)The table does not include unused credit facilities and letters of credit for investments that are accounted for under the equity method.
[2] (2) Includes the drawn uncommitted credit facilities totaling $39 million at Northern Powergrid.