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Revenue from Contracts with Customers Revenue from Contracts with Customers (Details) - USD ($)
$ in Millions
 3 Months Ended 6 Months Ended
Jun. 30, 2018
Jun. 30, 2017
Jun. 30, 2018
Jun. 30, 2017
Dec. 31, 2017
Disaggregation of Revenue [Line Items]          
Unbilled Contracts Receivable $ 722   $ 722   $ 665
Revenue from Contract with Customer, Excluding Assessed Tax 3,564   7,088    
Energy 3,720 $ 3,598 7,399 $ 7,179  
Non-contracts with customer revenue [Member]          
Disaggregation of Revenue [Line Items]          
Energy 156   311    
MidAmerican Funding [Member]          
Disaggregation of Revenue [Line Items]          
Revenue from Contract with Customer, Excluding Assessed Tax 710   1,451    
Energy 718 659 1,465 1,355  
MidAmerican Funding [Member] | Non-contracts with customer revenue [Member]          
Disaggregation of Revenue [Line Items]          
Energy 8   14    
PacifiCorp [Member]          
Disaggregation of Revenue [Line Items]          
Revenue from Contract with Customer, Excluding Assessed Tax 1,154   2,294    
Energy 1,193 1,245 2,377 2,526  
PacifiCorp [Member] | Non-contracts with customer revenue [Member]          
Disaggregation of Revenue [Line Items]          
Energy 39   83    
NV Energy, Inc. [Member]          
Disaggregation of Revenue [Line Items]          
Revenue from Contract with Customer, Excluding Assessed Tax 743   1,353    
Energy 750 753 1,367 1,337  
NV Energy, Inc. [Member] | Non-contracts with customer revenue [Member]          
Disaggregation of Revenue [Line Items]          
Energy 7   14    
Northern Powergrid Holdings [Member]          
Disaggregation of Revenue [Line Items]          
Revenue from Contract with Customer, Excluding Assessed Tax 226   486    
Energy 246 219 524 464  
Northern Powergrid Holdings [Member] | Non-contracts with customer revenue [Member]          
Disaggregation of Revenue [Line Items]          
Energy 20   38    
BHE Pipeline Group [Member]          
Disaggregation of Revenue [Line Items]          
Revenue from Contract with Customer, Excluding Assessed Tax 236   610    
Energy 236 192 612 507  
BHE Pipeline Group [Member] | Non-contracts with customer revenue [Member]          
Disaggregation of Revenue [Line Items]          
Energy 0   2    
BHE Transmission [Member]          
Disaggregation of Revenue [Line Items]          
Revenue from Contract with Customer, Excluding Assessed Tax 177   357    
Energy 177 158 357 324  
BHE Transmission [Member] | Non-contracts with customer revenue [Member]          
Disaggregation of Revenue [Line Items]          
Energy 0   0    
BHE Renewables [Member]          
Disaggregation of Revenue [Line Items]          
Revenue from Contract with Customer, Excluding Assessed Tax 186   303    
Energy 246 220 400 364  
BHE Renewables [Member] | Non-contracts with customer revenue [Member]          
Disaggregation of Revenue [Line Items]          
Energy 60   97    
Berkshire Hathaway Energy And Other [Member]          
Disaggregation of Revenue [Line Items]          
Revenue from Contract with Customer, Excluding Assessed Tax 132   234    
Energy 154 $ 152 297 $ 302  
Berkshire Hathaway Energy And Other [Member] | Non-contracts with customer revenue [Member]          
Disaggregation of Revenue [Line Items]          
Energy 22   63    
Regulated Operation [Member]          
Disaggregation of Revenue [Line Items]          
Revenue from Contract with Customer, Excluding Assessed Tax 3,201   6,453    
Regulated Operation [Member] | Regulated retail electric [Member]          
Disaggregation of Revenue [Line Items]          
Revenue from Contract with Customer, Excluding Assessed Tax 2,311   4,332    
Regulated Operation [Member] | Regulated retail gas [Member]          
Disaggregation of Revenue [Line Items]          
Revenue from Contract with Customer, Excluding Assessed Tax 118   404    
Regulated Operation [Member] | Regulated wholesale [Member]          
Disaggregation of Revenue [Line Items]          
Revenue from Contract with Customer, Excluding Assessed Tax 101   226    
Regulated Operation [Member] | Regulated transmission and distribution [Member]          
Disaggregation of Revenue [Line Items]          
Revenue from Contract with Customer, Excluding Assessed Tax 459   946    
Regulated Operation [Member] | Regulated interstate pipeline [Member]          
Disaggregation of Revenue [Line Items]          
Revenue from Contract with Customer, Excluding Assessed Tax 211   544    
Regulated Operation [Member] | Other customer revenue [Member]          
Disaggregation of Revenue [Line Items]          
Revenue from Contract with Customer, Excluding Assessed Tax 1   1    
Regulated Operation [Member] | MidAmerican Funding [Member]          
Disaggregation of Revenue [Line Items]          
Revenue from Contract with Customer, Excluding Assessed Tax 705   1,446    
Regulated Operation [Member] | MidAmerican Funding [Member] | Regulated retail electric [Member]          
Disaggregation of Revenue [Line Items]          
Revenue from Contract with Customer, Excluding Assessed Tax 505   891    
Regulated Operation [Member] | MidAmerican Funding [Member] | Regulated retail gas [Member]          
Disaggregation of Revenue [Line Items]          
Revenue from Contract with Customer, Excluding Assessed Tax 99   345    
Regulated Operation [Member] | MidAmerican Funding [Member] | Regulated wholesale [Member]          
Disaggregation of Revenue [Line Items]          
Revenue from Contract with Customer, Excluding Assessed Tax 87   180    
Regulated Operation [Member] | MidAmerican Funding [Member] | Regulated transmission and distribution [Member]          
Disaggregation of Revenue [Line Items]          
Revenue from Contract with Customer, Excluding Assessed Tax 14   30    
Regulated Operation [Member] | MidAmerican Funding [Member] | Regulated interstate pipeline [Member]          
Disaggregation of Revenue [Line Items]          
Revenue from Contract with Customer, Excluding Assessed Tax 0   0    
Regulated Operation [Member] | MidAmerican Funding [Member] | Other customer revenue [Member]          
Disaggregation of Revenue [Line Items]          
Revenue from Contract with Customer, Excluding Assessed Tax 0   0    
Regulated Operation [Member] | PacifiCorp [Member]          
Disaggregation of Revenue [Line Items]          
Revenue from Contract with Customer, Excluding Assessed Tax 1,154   2,294    
Regulated Operation [Member] | PacifiCorp [Member] | Regulated retail electric [Member]          
Disaggregation of Revenue [Line Items]          
Revenue from Contract with Customer, Excluding Assessed Tax 1,115   2,211    
Regulated Operation [Member] | PacifiCorp [Member] | Regulated retail gas [Member]          
Disaggregation of Revenue [Line Items]          
Revenue from Contract with Customer, Excluding Assessed Tax 0   0    
Regulated Operation [Member] | PacifiCorp [Member] | Regulated wholesale [Member]          
Disaggregation of Revenue [Line Items]          
Revenue from Contract with Customer, Excluding Assessed Tax 9   31    
Regulated Operation [Member] | PacifiCorp [Member] | Regulated transmission and distribution [Member]          
Disaggregation of Revenue [Line Items]          
Revenue from Contract with Customer, Excluding Assessed Tax 30   52    
Regulated Operation [Member] | PacifiCorp [Member] | Regulated interstate pipeline [Member]          
Disaggregation of Revenue [Line Items]          
Revenue from Contract with Customer, Excluding Assessed Tax 0   0    
Regulated Operation [Member] | PacifiCorp [Member] | Other customer revenue [Member]          
Disaggregation of Revenue [Line Items]          
Revenue from Contract with Customer, Excluding Assessed Tax 0   0    
Regulated Operation [Member] | NV Energy, Inc. [Member]          
Disaggregation of Revenue [Line Items]          
Revenue from Contract with Customer, Excluding Assessed Tax 742   1,352    
Regulated Operation [Member] | NV Energy, Inc. [Member] | Regulated retail electric [Member]          
Disaggregation of Revenue [Line Items]          
Revenue from Contract with Customer, Excluding Assessed Tax 691   1,230    
Regulated Operation [Member] | NV Energy, Inc. [Member] | Regulated retail gas [Member]          
Disaggregation of Revenue [Line Items]          
Revenue from Contract with Customer, Excluding Assessed Tax 19   59    
Regulated Operation [Member] | NV Energy, Inc. [Member] | Regulated wholesale [Member]          
Disaggregation of Revenue [Line Items]          
Revenue from Contract with Customer, Excluding Assessed Tax 6   17    
Regulated Operation [Member] | NV Energy, Inc. [Member] | Regulated transmission and distribution [Member]          
Disaggregation of Revenue [Line Items]          
Revenue from Contract with Customer, Excluding Assessed Tax 25   45    
Regulated Operation [Member] | NV Energy, Inc. [Member] | Regulated interstate pipeline [Member]          
Disaggregation of Revenue [Line Items]          
Revenue from Contract with Customer, Excluding Assessed Tax 0   0    
Regulated Operation [Member] | NV Energy, Inc. [Member] | Other customer revenue [Member]          
Disaggregation of Revenue [Line Items]          
Revenue from Contract with Customer, Excluding Assessed Tax 1   1    
Regulated Operation [Member] | Northern Powergrid Holdings [Member]          
Disaggregation of Revenue [Line Items]          
Revenue from Contract with Customer, Excluding Assessed Tax 216   465    
Regulated Operation [Member] | Northern Powergrid Holdings [Member] | Regulated retail electric [Member]          
Disaggregation of Revenue [Line Items]          
Revenue from Contract with Customer, Excluding Assessed Tax 0   0    
Regulated Operation [Member] | Northern Powergrid Holdings [Member] | Regulated retail gas [Member]          
Disaggregation of Revenue [Line Items]          
Revenue from Contract with Customer, Excluding Assessed Tax 0   0    
Regulated Operation [Member] | Northern Powergrid Holdings [Member] | Regulated wholesale [Member]          
Disaggregation of Revenue [Line Items]          
Revenue from Contract with Customer, Excluding Assessed Tax 0   0    
Regulated Operation [Member] | Northern Powergrid Holdings [Member] | Regulated transmission and distribution [Member]          
Disaggregation of Revenue [Line Items]          
Revenue from Contract with Customer, Excluding Assessed Tax 216   465    
Regulated Operation [Member] | Northern Powergrid Holdings [Member] | Regulated interstate pipeline [Member]          
Disaggregation of Revenue [Line Items]          
Revenue from Contract with Customer, Excluding Assessed Tax 0   0    
Regulated Operation [Member] | Northern Powergrid Holdings [Member] | Other customer revenue [Member]          
Disaggregation of Revenue [Line Items]          
Revenue from Contract with Customer, Excluding Assessed Tax 0   0    
Regulated Operation [Member] | BHE Pipeline Group [Member]          
Disaggregation of Revenue [Line Items]          
Revenue from Contract with Customer, Excluding Assessed Tax 236   610    
Regulated Operation [Member] | BHE Pipeline Group [Member] | Regulated retail electric [Member]          
Disaggregation of Revenue [Line Items]          
Revenue from Contract with Customer, Excluding Assessed Tax 0   0    
Regulated Operation [Member] | BHE Pipeline Group [Member] | Regulated retail gas [Member]          
Disaggregation of Revenue [Line Items]          
Revenue from Contract with Customer, Excluding Assessed Tax 0   0    
Regulated Operation [Member] | BHE Pipeline Group [Member] | Regulated wholesale [Member]          
Disaggregation of Revenue [Line Items]          
Revenue from Contract with Customer, Excluding Assessed Tax 0   0    
Regulated Operation [Member] | BHE Pipeline Group [Member] | Regulated transmission and distribution [Member]          
Disaggregation of Revenue [Line Items]          
Revenue from Contract with Customer, Excluding Assessed Tax 0   0    
Regulated Operation [Member] | BHE Pipeline Group [Member] | Regulated interstate pipeline [Member]          
Disaggregation of Revenue [Line Items]          
Revenue from Contract with Customer, Excluding Assessed Tax 236   610    
Regulated Operation [Member] | BHE Pipeline Group [Member] | Other customer revenue [Member]          
Disaggregation of Revenue [Line Items]          
Revenue from Contract with Customer, Excluding Assessed Tax 0   0    
Regulated Operation [Member] | BHE Transmission [Member]          
Disaggregation of Revenue [Line Items]          
Revenue from Contract with Customer, Excluding Assessed Tax 174   354    
Regulated Operation [Member] | BHE Transmission [Member] | Regulated retail electric [Member]          
Disaggregation of Revenue [Line Items]          
Revenue from Contract with Customer, Excluding Assessed Tax 0   0    
Regulated Operation [Member] | BHE Transmission [Member] | Regulated retail gas [Member]          
Disaggregation of Revenue [Line Items]          
Revenue from Contract with Customer, Excluding Assessed Tax 0   0    
Regulated Operation [Member] | BHE Transmission [Member] | Regulated wholesale [Member]          
Disaggregation of Revenue [Line Items]          
Revenue from Contract with Customer, Excluding Assessed Tax 0   0    
Regulated Operation [Member] | BHE Transmission [Member] | Regulated transmission and distribution [Member]          
Disaggregation of Revenue [Line Items]          
Revenue from Contract with Customer, Excluding Assessed Tax 174   354    
Regulated Operation [Member] | BHE Transmission [Member] | Regulated interstate pipeline [Member]          
Disaggregation of Revenue [Line Items]          
Revenue from Contract with Customer, Excluding Assessed Tax 0   0    
Regulated Operation [Member] | BHE Transmission [Member] | Other customer revenue [Member]          
Disaggregation of Revenue [Line Items]          
Revenue from Contract with Customer, Excluding Assessed Tax 0   0    
Regulated Operation [Member] | BHE Renewables [Member]          
Disaggregation of Revenue [Line Items]          
Revenue from Contract with Customer, Excluding Assessed Tax 0   0    
Regulated Operation [Member] | BHE Renewables [Member] | Regulated retail electric [Member]          
Disaggregation of Revenue [Line Items]          
Revenue from Contract with Customer, Excluding Assessed Tax 0   0    
Regulated Operation [Member] | BHE Renewables [Member] | Regulated retail gas [Member]          
Disaggregation of Revenue [Line Items]          
Revenue from Contract with Customer, Excluding Assessed Tax 0   0    
Regulated Operation [Member] | BHE Renewables [Member] | Regulated wholesale [Member]          
Disaggregation of Revenue [Line Items]          
Revenue from Contract with Customer, Excluding Assessed Tax 0   0    
Regulated Operation [Member] | BHE Renewables [Member] | Regulated transmission and distribution [Member]          
Disaggregation of Revenue [Line Items]          
Revenue from Contract with Customer, Excluding Assessed Tax 0   0    
Regulated Operation [Member] | BHE Renewables [Member] | Regulated interstate pipeline [Member]          
Disaggregation of Revenue [Line Items]          
Revenue from Contract with Customer, Excluding Assessed Tax 0   0    
Regulated Operation [Member] | BHE Renewables [Member] | Other customer revenue [Member]          
Disaggregation of Revenue [Line Items]          
Revenue from Contract with Customer, Excluding Assessed Tax 0   0    
Regulated Operation [Member] | Berkshire Hathaway Energy And Other [Member]          
Disaggregation of Revenue [Line Items]          
Revenue from Contract with Customer, Excluding Assessed Tax (26)   (68)    
Regulated Operation [Member] | Berkshire Hathaway Energy And Other [Member] | Regulated retail electric [Member]          
Disaggregation of Revenue [Line Items]          
Revenue from Contract with Customer, Excluding Assessed Tax 0   0    
Regulated Operation [Member] | Berkshire Hathaway Energy And Other [Member] | Regulated retail gas [Member]          
Disaggregation of Revenue [Line Items]          
Revenue from Contract with Customer, Excluding Assessed Tax 0   0    
Regulated Operation [Member] | Berkshire Hathaway Energy And Other [Member] | Regulated wholesale [Member]          
Disaggregation of Revenue [Line Items]          
Revenue from Contract with Customer, Excluding Assessed Tax (1)   (2)    
Regulated Operation [Member] | Berkshire Hathaway Energy And Other [Member] | Regulated transmission and distribution [Member]          
Disaggregation of Revenue [Line Items]          
Revenue from Contract with Customer, Excluding Assessed Tax 0   0    
Regulated Operation [Member] | Berkshire Hathaway Energy And Other [Member] | Regulated interstate pipeline [Member]          
Disaggregation of Revenue [Line Items]          
Revenue from Contract with Customer, Excluding Assessed Tax (25)   (66)    
Regulated Operation [Member] | Berkshire Hathaway Energy And Other [Member] | Other customer revenue [Member]          
Disaggregation of Revenue [Line Items]          
Revenue from Contract with Customer, Excluding Assessed Tax 0   0    
Unregulated Operation [Member] | Nonregulated products and services [Member]          
Disaggregation of Revenue [Line Items]          
Revenue from Contract with Customer, Excluding Assessed Tax 363   635    
Unregulated Operation [Member] | MidAmerican Funding [Member] | Nonregulated products and services [Member]          
Disaggregation of Revenue [Line Items]          
Revenue from Contract with Customer, Excluding Assessed Tax 5   5    
Unregulated Operation [Member] | PacifiCorp [Member] | Nonregulated products and services [Member]          
Disaggregation of Revenue [Line Items]          
Revenue from Contract with Customer, Excluding Assessed Tax 0   0    
Unregulated Operation [Member] | NV Energy, Inc. [Member] | Nonregulated products and services [Member]          
Disaggregation of Revenue [Line Items]          
Revenue from Contract with Customer, Excluding Assessed Tax 1   1    
Unregulated Operation [Member] | Northern Powergrid Holdings [Member] | Nonregulated products and services [Member]          
Disaggregation of Revenue [Line Items]          
Revenue from Contract with Customer, Excluding Assessed Tax 10   21    
Unregulated Operation [Member] | BHE Pipeline Group [Member] | Nonregulated products and services [Member]          
Disaggregation of Revenue [Line Items]          
Revenue from Contract with Customer, Excluding Assessed Tax 0   0    
Unregulated Operation [Member] | BHE Transmission [Member] | Nonregulated products and services [Member]          
Disaggregation of Revenue [Line Items]          
Revenue from Contract with Customer, Excluding Assessed Tax 3   3    
Unregulated Operation [Member] | BHE Renewables [Member] | Nonregulated products and services [Member]          
Disaggregation of Revenue [Line Items]          
Revenue from Contract with Customer, Excluding Assessed Tax 186   303    
Unregulated Operation [Member] | Berkshire Hathaway Energy And Other [Member] | Nonregulated products and services [Member]          
Disaggregation of Revenue [Line Items]          
Revenue from Contract with Customer, Excluding Assessed Tax $ 158   $ 302