v3.25.0.1
Consolidated Balance Sheets - GAS (Parenthetical) - USD ($)
$ in Millions
Dec. 31, 2024
Dec. 31, 2023
Other intangible assets, amortization $ 412 $ 376
Common Stockholders' Equity:    
Common stock, par value (in dollars per share) $ 5 $ 5
Common stock, shares authorized (in shares) 1,500,000,000 1,500,000,000
Southern Company Gas    
Other intangible assets, amortization $ 173 $ 166
Common Stockholders' Equity:    
Common stock, par value (in dollars per share) $ 0.01 $ 0.01
Common stock, shares authorized (in shares) 100,000,000 100,000,000
Common stock, shares outstanding (in shares) 100 100