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Investments and Restricted Cash and Cash Equivalents (Tables)
 12 Months Ended
Dec. 31, 2024
Investments, Including Equity Method And Restricted Cash And Investments [Line Items]  
Schedule of Investments and Restricted Cash and Cash Equivalents
Investments and restricted cash and cash equivalents and investments consists of the following as of December 31 (in millions):
 20242023
Investments:
BYD Company Limited common stock$415 $2,218 
U.S. Treasury Bills— 996 
Rabbi trusts525 487 
Other394 338 
Total investments1,334 4,039 
   
Equity method investments:
BHE Renewables tax equity investments4,773 4,058 
Electric Transmission Texas, LLC761 673 
Iroquois Gas Transmission System, L.P.580 599 
Other339 381 
Total equity method investments6,453 5,711 
Restricted cash and cash equivalents and investments:  
Quad Cities Station nuclear decommissioning trust funds871 767 
Other restricted cash and cash equivalents194 246 
Total restricted cash and cash equivalents and investments1,065 1,013 
   
Total investments and restricted cash and cash equivalents and investments$8,852 $10,763 
Reflected as:
Other current assets$217 $1,253 
Noncurrent assets8,635 9,510 
Total investments and restricted cash and cash equivalents and investments$8,852 $10,763 
Schedule of Unrealized Gain (Loss) on Investments
Gains (losses) on marketable securities, net recognized during the period consists of the following for the years ended December 31 (in millions):
202420232022
Unrealized gains (losses) recognized on marketable securities held at the reporting date$110 $252 $(1,487)
Net gains (losses) recognized on marketable securities sold during the period364 417 (515)
Gains (losses) on marketable securities, net$474 $669 $(2,002)
MEC  
Investments, Including Equity Method And Restricted Cash And Investments [Line Items]  
Schedule of Investments and Restricted Cash and Cash Equivalents
Investments and restricted investments consists of the following amounts as of December 31 (in millions):
20242023
Nuclear decommissioning trust$871 $767 
Rabbi trusts252 239 
Other24 24 
Total$1,147 $1,030 
EEGH  
Investments, Including Equity Method And Restricted Cash And Investments [Line Items]  
Schedule of Investments and Restricted Cash and Cash Equivalents
Investments and restricted cash and cash equivalents consists of the following as of December 31 (in millions):

20242023
Investments:
Investment funds$18 $19 
Equity method investments:
Iroquois243 262 
Total investments261 281 
Restricted cash and cash equivalents:
Customer deposits27 31 
Total restricted cash and cash equivalents27 31 
Total investments and restricted cash and cash equivalents$288 $312 
Reflected as:
Current assets$27 $31 
Noncurrent assets261 281 
Total investments and restricted cash and cash equivalents$288 $312 
EGTS  
Investments, Including Equity Method And Restricted Cash And Investments [Line Items]  
Schedule of Investments and Restricted Cash and Cash Equivalents
Investments and restricted cash and cash equivalents consists of the following as of December 31 (in millions):

20242023
Investments:
Investment funds$18 $19 
Restricted cash and cash equivalents:
Customer deposits24 29 
Total restricted cash and cash equivalents24 29 
Total investments and restricted cash and cash equivalents$42 $48 
Reflected as:
Current assets$24 $29 
Other assets18 19 
Total investments and restricted cash and cash equivalents$42 $48