The Registrants' property, plant, and equipment in service consisted of the following at December 31, 2025 and 2024:
At December 31, 2025:
Southern
Company
Alabama
Power
Georgia
Power
Mississippi
Power
Southern
Power
Southern
Company
Gas
(in millions)
Electric utilities:
Generation$63,533 $17,912 $27,192 $2,969 $14,986 $ 
Transmission17,814 7,057 9,651 1,064   
Distribution31,718 11,058 19,083 1,577   
General/other6,854 2,888 3,532 362 48  
Electric utilities' plant in service119,919 38,915 59,458 5,972 15,034  
Southern Company Gas:
Natural gas transportation and distribution
20,177     20,177 
Storage facilities1,954     1,954 
Other1,967     1,967 
Southern Company Gas plant in service24,098     24,098 
Other plant in service2,097      
Total plant in service$146,114 $38,915 $59,458 $5,972 $15,034 $24,098 
At December 31, 2024:
Southern
Company
Alabama
Power
Georgia
Power
Mississippi
Power
Southern
Power
Southern
Company
Gas
(in millions)
Electric utilities:
Generation$61,292 $16,801 $26,089 $2,946 $14,920 $— 
Transmission16,280 6,449 8,800 989 — — 
Distribution28,678 10,373 16,887 1,418 — — 
General/other6,547 2,878 3,260 344 41 — 
Electric utilities' plant in service112,797 36,501 55,036 5,697 14,961 — 
Southern Company Gas:
Natural gas transportation and distribution
18,896 — — — — 18,896 
Storage facilities1,748 — — — — 1,748 
Other1,694 — — — — 1,694 
Southern Company Gas plant in service22,338 — — — — 22,338 
Other plant in service2,008 — — — — — 
Total plant in service$137,143 $36,501 $55,036 $5,697 $14,961 $22,338 
The primary assets in Southern Power's property, plant, and equipment are generating facilities, which generally have estimated useful lives as follows:
Southern Power Generating FacilityUseful life
Natural gas
Up to 50 years
Solar
Up to 35 years
Wind
Up to 35 years

Historical Timeline

Fiscal YearFiled
2025Feb 19, 2026Showing above
2024Feb 20, 2025
2023Feb 15, 2024
2022Feb 16, 2023

About PP&E Disclosures

The PP&E disclosure details a company's physical asset base — land, buildings, machinery, and equipment — along with the depreciation methods and useful life assumptions that determine how these costs flow through the income statement. Capitalization policy thresholds reveal management's judgment on the boundary between expense and asset, directly affecting both reported earnings and asset values.

Key signals: changes in estimated useful lives or depreciation methods can materially shift reported earnings without any operational change. Compare capital expenditures against depreciation expense — when capex consistently trails depreciation, the asset base may be aging and underinvested. Watch for large asset impairments or write-downs that signal overvalued carrying amounts. Asset retirement obligations reveal future environmental or decommissioning costs that are often underappreciated. Compare PP&E intensity (PP&E-to-revenue) against industry peers to assess capital efficiency and competitive positioning.