v3.25.0.1
FINANCING - Bank Credit Arrangements (Details)
$ in Millions
Dec. 31, 2024
USD ($)
Line of Credit Facility [Line Items]  
2025 $ 580
2026 665
2027 275
2029 6,400
Total 7,920
Unused 7,891
Expires within One Year 580
Southern Company  
Line of Credit Facility [Line Items]  
2025 150
2026 0
2027 0
2029 1,850
Total 2,000
Unused 1,998
Expires within One Year 150
Alabama Power  
Line of Credit Facility [Line Items]  
2025 0
2026 665
2027 0
2029 700
Total 1,365
Unused 1,364
Expires within One Year 0
Georgia Power  
Line of Credit Facility [Line Items]  
2025 300
2026 0
2027 0
2029 1,750
Total 2,050
Unused 2,026
Expires within One Year 300
Mississippi Power  
Line of Credit Facility [Line Items]  
2025 0
2026 0
2027 275
2029 0
Total 275
Unused 275
Expires within One Year 0
Southern Power  
Line of Credit Facility [Line Items]  
2025 0
2026 0
2027 0
2029 600
Total 600
Unused 600
Expires within One Year 0
Southern Power | Continuing Letter of Credit Facility A  
Line of Credit Facility [Line Items]  
2025 100
2026 75
Unused 16
Southern Power | Continuing Letter of Credit Facility B  
Line of Credit Facility [Line Items]  
Unused 11
Southern Company Gas  
Line of Credit Facility [Line Items]  
2025 100
2026 0
2027 0
2029 1,500
Total 1,600
Unused 1,598
Expires within One Year 100
Other Subsidiaries  
Line of Credit Facility [Line Items]  
2025 30
2026 0
2027 0
2029 0
Total 30
Unused 30
Expires within One Year 30
Southern Company and Southern Power  
Line of Credit Facility [Line Items]  
2029 2,450
Southern Company Gas Capital  
Line of Credit Facility [Line Items]  
Total 800
Nicor Gas  
Line of Credit Facility [Line Items]  
2025 100
Total 700
Alabama Property Company  
Line of Credit Facility [Line Items]  
2026 15
Unused $ 14