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Investments and Restricted Cash and Cash Equivalents (Tables)
 12 Months Ended
Dec. 31, 2022
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):
20222021
Investments:
BYD Company Limited common stock$3,763 $7,693 
U.S. Treasury Bills1,931 — 
Rabbi trusts433 492 
Other335 305 
Total investments6,462 8,490 
  
Equity method investments:
BHE Renewables tax equity investments4,535 4,931 
Electric Transmission Texas, LLC623 595 
Iroquois Gas Transmission System, L.P.600 735 
Other304 293 
Total equity method investments6,062 6,554 
Restricted cash and cash equivalents and investments:  
Quad Cities Station nuclear decommissioning trust funds664 768 
Other restricted cash and cash equivalents226 148 
Total restricted cash and cash equivalents and investments890 916 
  
Total investments and restricted cash and cash equivalents and investments$13,414 $15,960 
Reflected as:
Other current assets$2,141 $172 
Noncurrent assets11,273 15,788 
Total investments and restricted cash and cash equivalents and investments$13,414 $15,960 
Schedule of Unrealized Gain (Loss) on Investments
(Losses) gains on marketable securities, net recognized during the period consists of the following for the years ended December 31 (in millions):
202220212020
Unrealized (losses) gains recognized on marketable securities held at the reporting date$(1,487)$1,819 $4,791 
Net (losses) gains recognized on marketable securities sold during the period(515)4 6 
(Losses) gains on marketable securities, net$(2,002)$1,823 $4,797 
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):
20222021
Nuclear decommissioning trust$664 $768 
Rabbi trusts215 233 
Other23 25 
Total$902 $1,026 
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):

20222021
Investments:
Investment funds$14 $13 
Equity method investments:
Iroquois264 399 
Total investments278 412 
Restricted cash and cash equivalents:
Customer deposits30 17 
Total restricted cash and cash equivalents30 17 
Total investments and restricted cash and cash equivalents$308 $429 
Reflected as:
Current assets$30 $17 
Noncurrent assets278 412 
Total investments and restricted cash and cash equivalents$308 $429 
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):

20222021
Investments:
Investment funds$14 $13 
Restricted cash and cash equivalents:
Customer deposits29 15 
Total restricted cash and cash equivalents29 15 
Total investments and restricted cash and cash equivalents$43 $28 
Reflected as:
Current assets$29 $15 
Noncurrent assets14 13 
Total investments and restricted cash and cash equivalents$43 $28