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Related Party Transactions - SPPC (Details) - USD ($)
12 Months Ended
Dec. 31, 2022
Dec. 31, 2021
Dec. 31, 2020
Nov. 30, 2022
Related Party Transaction [Line Items]        
Related party, cash received (paid) for income taxes $ 1,961,000,000 $ 1,441,000,000 $ 1,504,000,000  
SPPC        
Related Party Transaction [Line Items]        
Note payable to affiliate 70,000,000 0    
SPPC | BHE        
Related Party Transaction [Line Items]        
SG&A expenses from transactions with related party 23,000,000 14,000,000 4,000,000  
SPPC | NPC        
Related Party Transaction [Line Items]        
SG&A expenses from transactions with related party 25,000,000 25,000,000 26,000,000  
Receivables from affiliates 0 0    
Due to affiliate 33,000,000 2,000,000    
Expense reimbursement 16,000,000 15,000,000 15,000,000  
SPPC | NV Energy        
Related Party Transaction [Line Items]        
SG&A expenses from transactions with related party 5,000,000 5,000,000 5,000,000  
Receivables from affiliates 0 0    
Due to affiliate 47,000,000 19,000,000    
Expense reimbursement 1,000,000 0 0  
Note payable to affiliate 70,000,000     $ 100,000,000
Income tax receivable (payable), related parties current 11,000,000 0    
Related party, cash received (paid) for income taxes 1,000,000 3,000,000 (2,000,000)  
SPPC | Distribution | NPC        
Related Party Transaction [Line Items]        
Related party revenue 86,000,000 43,000,000 34,000,000  
Receivables from affiliates 5,000,000 0    
Purchases from related party 362,000,000 179,000,000 $ 106,000,000  
Due to affiliate $ 41,000,000 $ 13,000,000