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Investments and Restricted Cash and Cash Equivalents and Investments - EEGH - Components (Details) - USD ($)
$ in Millions
Mar. 31, 2023
Dec. 31, 2022
Investments:    
Equity method investments $ 6,027 $ 6,062
Total investments and restricted cash and cash equivalents and investments 13,857 13,414
Reflected as:    
Other current assets 3,032 2,141
Noncurrent assets 10,825 11,273
EEGH    
Investments:    
Total investments 285 278
Restricted cash and cash equivalents 31 30
Total investments and restricted cash and cash equivalents and investments 316 308
Reflected as:    
Other current assets 31 30
Noncurrent assets 285 278
EEGH | Customer deposits    
Investments:    
Restricted cash and cash equivalents 31 30
Iroquois Gas Transmission System, L.P.    
Investments:    
Equity method investments 604 600
Iroquois Gas Transmission System, L.P. | EEGH    
Investments:    
Equity method investments 268 264
Investment funds | EEGH    
Investments:    
Investments $ 17 $ 14