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Consolidated Entities and Equity Method Investments (Tables)
6 Months Ended
Jun. 30, 2024
Regulated Operations [Abstract]  
Schedule of Equity Method Investments
The carrying amounts of Southern Company Gas' equity method investments at June 30, 2024 and December 31, 2023 were as follows:
Investment BalanceJune 30, 2024December 31, 2023
(in millions)
SNG$1,213 $1,202 
Other33 33 
Total$1,246 $1,235