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Investments and Restricted Cash and Cash Equivalents and Investments - EEGH - Components (Details) - USD ($)
$ in Millions
Jun. 30, 2023
Dec. 31, 2022
Investments:    
Equity method investments $ 5,901 $ 6,062
Total investments and restricted cash and cash equivalents and investments 14,046 13,414
Reflected as:    
Other current assets 3,484 2,141
Noncurrent assets 10,562 11,273
EEGH    
Investments:    
Total investments 278 278
Restricted cash and cash equivalents 30 30
Total investments and restricted cash and cash equivalents and investments 308 308
Reflected as:    
Other current assets 30 30
Noncurrent assets 278 278
EEGH | Customer deposits    
Investments:    
Restricted cash and cash equivalents 30 30
Iroquois Gas Transmission System, L.P.    
Investments:    
Equity method investments 596 600
Iroquois Gas Transmission System, L.P. | EEGH    
Investments:    
Equity method investments 260 264
Investment funds | EEGH    
Investments:    
Investments $ 18 $ 14