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Short-Term Debt and Credit Facilities Short-Term Debt (Details) - USD ($)
$ in Millions
Dec. 31, 2019
Dec. 31, 2018
Dec. 31, 2017
Dec. 31, 2016
Dec. 31, 2015
Short-term Debt [Line Items]          
Line of Credit Facility, Maximum Borrowing Capacity [1] $ 9,412 $ 9,114      
Line of Credit Facility, Amounts Supported [1] 629 543      
Short-term debt [1] 3,214 2,516      
Berkshire Hathaway Energy [Member]          
Short-term Debt [Line Items]          
Line of Credit Facility, Maximum Borrowing Capacity 3,500 [2] 3,500      
Line of Credit Facility, Amounts Supported 0 0      
Short-term debt 1,590 983      
PacifiCorp [Member]          
Short-term Debt [Line Items]          
Line of Credit Facility, Maximum Borrowing Capacity 1,200 [2] 1,200      
Line of Credit Facility, Amounts Supported 256 89      
Short-term debt 130 30 $ 80 $ 270 $ 20
MidAmerican Energy Company and Subsidiaries [Member]          
Short-term Debt [Line Items]          
Line of Credit Facility, Maximum Borrowing Capacity 1,305 1,305      
Line of Credit Facility, Amounts Supported 370 370      
Short-term debt $ 0 $ 240      
Line of Credit [Member] | Berkshire Hathaway Energy [Member]          
Short-term Debt [Line Items]          
Debt, Weighted Average Interest Rate 1.90% 2.80%      
Line of Credit [Member] | PacifiCorp [Member]          
Short-term Debt [Line Items]          
Debt, Weighted Average Interest Rate 2.05% 2.85%      
Line of Credit [Member] | PacifiCorp [Member] | Unsecured credit facility, $600 million, expiring June 2022, first facility, extended [Member]          
Short-term Debt [Line Items]          
Line of Credit Facility, Maximum Borrowing Capacity $ 600        
Line of Credit [Member] | PacifiCorp [Member] | Unsecured credit facility, $600 million, expiring June 2022, second facility, extended [Member]          
Short-term Debt [Line Items]          
Line of Credit Facility, Maximum Borrowing Capacity $ 600        
Commercial Paper [Member] | PacifiCorp [Member]          
Short-term Debt [Line Items]          
Debt, Weighted Average Interest Rate 2.05% 2.85%      
Commercial Paper [Member] | MidAmerican Energy Company and Subsidiaries [Member]          
Short-term Debt [Line Items]          
Short-term debt   $ 240      
Short-term Debt, Weighted Average Interest Rate, at Point in Time   2.49%      
[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.