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CONSOLIDATED ENTITIES AND EQUITY METHOD INVESTMENTS (Tables)
12 Months Ended
Dec. 31, 2025
Equity Method Investments and Joint Ventures [Abstract]  
Equity method investments
The carrying amounts of Southern Company Gas' equity method investments at December 31, 2025 and 2024 were as follows:
Investment BalanceAt December 31, 2025At December 31, 2024
(in millions)
SNG$1,148 $1,245 
Other
34 34 
Total$1,182 $1,279