LEASES - Balance Sheet Amounts Recorded for Operating and Financing Leases (Details) - USD ($) $ in Millions |
Dec. 31, 2024 |
Dec. 31, 2023 |
| Operating Leases |
|
|
| Operating lease ROU assets, net |
$ 1,386
|
$ 1,432
|
| Operating lease obligations - current |
200
|
183
|
| Operating lease obligations - non-current |
1,253
|
1,307
|
| Total operating lease obligations |
$ 1,453
|
$ 1,490
|
| Finance Leases |
|
|
| Finance Lease, Right-of-Use Asset, Statement of Financial Position [Extensible Enumeration] |
Public Utilities, Other Depreciable Property, Plant And Equipment, Plant In Service
|
Public Utilities, Other Depreciable Property, Plant And Equipment, Plant In Service
|
| Finance lease ROU assets, net |
$ 254
|
$ 272
|
| Finance Lease, Liability, Current, Statement of Financial Position [Extensible Enumeration] |
Other Liabilities, Current
|
Other Liabilities, Current
|
| Finance lease obligations - current |
$ 9
|
$ 11
|
| Finance Lease, Liability, Noncurrent, Statement of Financial Position [Extensible Enumeration] |
Long-Term Debt
|
Long-Term Debt
|
| Finance lease obligations - non-current |
$ 278
|
$ 287
|
| Total finance lease obligations |
287
|
298
|
| Assets Subject to Power Purchase Agreement |
|
|
| Operating Leases |
|
|
| Total operating lease obligations |
567
|
566
|
| Alabama Power |
|
|
| Operating Leases |
|
|
| Operating lease ROU assets, net |
$ 84
|
$ 87
|
| Operating Lease, Liability, Current, Statement of Financial Position [Extensible Enumeration] |
Other Liabilities, Current
|
Other Liabilities, Current
|
| Operating lease obligations - current |
$ 14
|
$ 12
|
| Operating lease obligations - non-current |
76
|
81
|
| Total operating lease obligations |
$ 90
|
$ 93
|
| Finance Leases |
|
|
| Finance Lease, Right-of-Use Asset, Statement of Financial Position [Extensible Enumeration] |
Public Utilities, Other Depreciable Property, Plant And Equipment, Plant In Service
|
Public Utilities, Other Depreciable Property, Plant And Equipment, Plant In Service
|
| Finance lease ROU assets, net |
$ 4
|
$ 5
|
| Finance Lease, Liability, Current, Statement of Financial Position [Extensible Enumeration] |
Other Liabilities, Current
|
Other Liabilities, Current
|
| Finance lease obligations - current |
$ 1
|
$ 2
|
| Finance Lease, Liability, Noncurrent, Statement of Financial Position [Extensible Enumeration] |
Long-Term Debt
|
Long-Term Debt
|
| Finance lease obligations - non-current |
$ 3
|
$ 3
|
| Total finance lease obligations |
4
|
5
|
| Alabama Power | Assets Subject to Power Purchase Agreement |
|
|
| Operating Leases |
|
|
| Total operating lease obligations |
55
|
58
|
| Georgia Power |
|
|
| Operating Leases |
|
|
| Operating lease ROU assets, net |
1,331
|
884
|
| Operating lease obligations - current |
169
|
135
|
| Operating lease obligations - non-current |
1,159
|
740
|
| Total operating lease obligations |
$ 1,328
|
$ 875
|
| Finance Leases |
|
|
| Finance Lease, Right-of-Use Asset, Statement of Financial Position [Extensible Enumeration] |
Public Utilities, Other Depreciable Property, Plant And Equipment, Plant In Service
|
Public Utilities, Other Depreciable Property, Plant And Equipment, Plant In Service
|
| Finance lease ROU assets, net |
$ 227
|
$ 203
|
| Finance Lease, Liability, Current, Statement of Financial Position [Extensible Enumeration] |
Other Liabilities, Current
|
Other Liabilities, Current
|
| Finance lease obligations - current |
$ 20
|
$ 18
|
| Finance Lease, Liability, Noncurrent, Statement of Financial Position [Extensible Enumeration] |
Long-Term Debt
|
Long-Term Debt
|
| Finance lease obligations - non-current |
$ 241
|
$ 222
|
| Total finance lease obligations |
261
|
240
|
| Georgia Power | Assets Subject to Power Purchase Agreement |
|
|
| Operating Leases |
|
|
| Total operating lease obligations |
$ 1,300
|
$ 813
|
| Mississippi Power |
|
|
| Operating Leases |
|
|
| Operating Lease, Right-of-Use Asset, Statement of Financial Position [Extensible Enumeration] |
Other deferred charges and assets
|
Other deferred charges and assets
|
| Operating lease ROU assets, net |
$ 8
|
$ 9
|
| Operating Lease, Liability, Current, Statement of Financial Position [Extensible Enumeration] |
Other Liabilities, Current
|
Other Liabilities, Current
|
| Operating lease obligations - current |
$ 4
|
$ 3
|
| Operating Lease, Liability, Noncurrent, Statement of Financial Position [Extensible Enumeration] |
Other Liabilities, Noncurrent
|
Other Liabilities, Noncurrent
|
| Operating lease obligations - non-current |
$ 4
|
$ 6
|
| Total operating lease obligations |
$ 8
|
$ 9
|
| Finance Leases |
|
|
| Finance Lease, Right-of-Use Asset, Statement of Financial Position [Extensible Enumeration] |
Public Utilities, Other Depreciable Property, Plant And Equipment, Plant In Service
|
Public Utilities, Other Depreciable Property, Plant And Equipment, Plant In Service
|
| Finance lease ROU assets, net |
$ 14
|
$ 15
|
| Finance Lease, Liability, Current, Statement of Financial Position [Extensible Enumeration] |
Other Liabilities, Current
|
Other Liabilities, Current
|
| Finance lease obligations - current |
$ 1
|
$ 1
|
| Finance Lease, Liability, Noncurrent, Statement of Financial Position [Extensible Enumeration] |
Long-Term Debt
|
Long-Term Debt
|
| Finance lease obligations - non-current |
$ 13
|
$ 15
|
| Total finance lease obligations |
14
|
16
|
| Southern Power |
|
|
| Operating Leases |
|
|
| Operating lease ROU assets, net |
$ 484
|
$ 488
|
| Operating Lease, Liability, Current, Statement of Financial Position [Extensible Enumeration] |
Other Liabilities, Current
|
Other Liabilities, Current
|
| Operating lease obligations - current |
$ 29
|
$ 29
|
| Operating lease obligations - non-current |
511
|
517
|
| Total operating lease obligations |
540
|
546
|
| Finance Leases |
|
|
| Finance lease ROU assets, net |
0
|
0
|
| Finance lease obligations - current |
0
|
0
|
| Finance lease obligations - non-current |
0
|
0
|
| Total finance lease obligations |
0
|
0
|
| Southern Company Gas |
|
|
| Operating Leases |
|
|
| Operating lease ROU assets, net |
$ 38
|
$ 47
|
| Operating Lease, Liability, Current, Statement of Financial Position [Extensible Enumeration] |
Other Liabilities, Current
|
Other Liabilities, Current
|
| Operating lease obligations - current |
$ 11
|
$ 11
|
| Operating lease obligations - non-current |
30
|
40
|
| Total operating lease obligations |
41
|
51
|
| Finance Leases |
|
|
| Finance lease ROU assets, net |
0
|
0
|
| Finance lease obligations - current |
0
|
0
|
| Finance lease obligations - non-current |
0
|
0
|
| Total finance lease obligations |
$ 0
|
$ 0
|