REGULATORY MATTERS - Schedule of Regulatory Assets and Liabilities (Details) - USD ($)
$ in Millions |
12 Months Ended |
|
Dec. 31, 2024 |
Dec. 31, 2023 |
Dec. 31, 2022 |
Jan. 01, 2023 |
| Schedule of Regulatory Assets and Liabilities [Line Items] |
|
|
|
|
| Net regulatory assets |
$ 7,041
|
$ 6,523
|
|
|
| Regulatory asset amortization period |
4 years
|
|
|
|
| Regulatory asset |
|
66
|
$ 216
|
|
| Regulatory liabilities |
$ 705
|
|
|
|
| Alabama Power |
|
|
|
|
| Schedule of Regulatory Assets and Liabilities [Line Items] |
|
|
|
|
| Net regulatory assets |
2,356
|
2,720
|
|
|
| Regulatory asset |
70
|
76
|
97
|
|
| Georgia Power |
|
|
|
|
| Schedule of Regulatory Assets and Liabilities [Line Items] |
|
|
|
|
| Net regulatory assets |
6,139
|
5,090
|
|
|
| Regulatory asset |
|
|
83
|
|
| Costs recovered annually |
5
|
5
|
12
|
|
| Regulatory liabilities |
$ 827
|
54
|
|
|
| Georgia Power | Plant Vogtle Units 3 and 4 |
|
|
|
|
| Schedule of Regulatory Assets and Liabilities [Line Items] |
|
|
|
|
| Regulatory asset amortization period |
10 years
|
|
|
|
| Mississippi Power |
|
|
|
|
| Schedule of Regulatory Assets and Liabilities [Line Items] |
|
|
|
|
| Net regulatory assets |
$ 59
|
90
|
|
|
| Regulatory asset |
52
|
44
|
$ 36
|
|
| Southern Company Gas |
|
|
|
|
| Schedule of Regulatory Assets and Liabilities [Line Items] |
|
|
|
|
| Net regulatory assets |
$ (2,252)
|
(2,225)
|
|
|
| Fuel Hedging (Realized And Unrealized) losses | Alabama Power |
|
|
|
|
| Schedule of Regulatory Assets and Liabilities [Line Items] |
|
|
|
|
| Regulatory liability amortization period |
3 years 6 months
|
|
|
|
| Fuel Hedging (Realized And Unrealized) losses | Georgia Power |
|
|
|
|
| Schedule of Regulatory Assets and Liabilities [Line Items] |
|
|
|
|
| Regulatory liability amortization period |
3 years
|
|
|
|
| Fuel Hedging (Realized And Unrealized) losses | Mississippi Power |
|
|
|
|
| Schedule of Regulatory Assets and Liabilities [Line Items] |
|
|
|
|
| Regulatory liability amortization period |
4 years
|
|
|
|
| Deferred Income Tax Credits |
|
|
|
|
| Schedule of Regulatory Assets and Liabilities [Line Items] |
|
|
|
|
| Net regulatory assets |
$ (4,536)
|
(4,686)
|
|
|
| Deferred Income Tax Credits | Alabama Power |
|
|
|
|
| Schedule of Regulatory Assets and Liabilities [Line Items] |
|
|
|
|
| Net regulatory assets |
(1,398)
|
(1,506)
|
|
|
| Deferred Income Tax Credits | Georgia Power |
|
|
|
|
| Schedule of Regulatory Assets and Liabilities [Line Items] |
|
|
|
|
| Net regulatory assets |
(2,149)
|
(2,161)
|
|
|
| Deferred Income Tax Credits | Mississippi Power |
|
|
|
|
| Schedule of Regulatory Assets and Liabilities [Line Items] |
|
|
|
|
| Net regulatory assets |
(219)
|
(241)
|
|
|
| Deferred Income Tax Credits | Southern Company Gas |
|
|
|
|
| Schedule of Regulatory Assets and Liabilities [Line Items] |
|
|
|
|
| Net regulatory assets |
(755)
|
(759)
|
|
|
| Other Cost of Removal Obligations |
|
|
|
|
| Schedule of Regulatory Assets and Liabilities [Line Items] |
|
|
|
|
| Net regulatory assets |
(1,176)
|
(287)
|
|
|
| Other Cost of Removal Obligations | Alabama Power |
|
|
|
|
| Schedule of Regulatory Assets and Liabilities [Line Items] |
|
|
|
|
| Net regulatory assets |
24
|
(3)
|
|
|
| Other Cost of Removal Obligations | Georgia Power |
|
|
|
|
| Schedule of Regulatory Assets and Liabilities [Line Items] |
|
|
|
|
| Net regulatory assets |
816
|
(46)
|
|
|
| Other Cost of Removal Obligations | Mississippi Power |
|
|
|
|
| Schedule of Regulatory Assets and Liabilities [Line Items] |
|
|
|
|
| Net regulatory assets |
(170)
|
0
|
|
|
| Other Cost of Removal Obligations | Southern Company Gas |
|
|
|
|
| Schedule of Regulatory Assets and Liabilities [Line Items] |
|
|
|
|
| Net regulatory assets |
(1,846)
|
(238)
|
|
|
| Over Recovered Regulatory Clause Revenues |
|
|
|
|
| Schedule of Regulatory Assets and Liabilities [Line Items] |
|
|
|
|
| Net regulatory assets |
(285)
|
(1,312)
|
|
|
| Over Recovered Regulatory Clause Revenues | Alabama Power |
|
|
|
|
| Schedule of Regulatory Assets and Liabilities [Line Items] |
|
|
|
|
| Net regulatory assets |
(29)
|
28
|
|
|
| Over Recovered Regulatory Clause Revenues | Georgia Power |
|
|
|
|
| Schedule of Regulatory Assets and Liabilities [Line Items] |
|
|
|
|
| Net regulatory assets |
(52)
|
617
|
|
|
| Over Recovered Regulatory Clause Revenues | Mississippi Power |
|
|
|
|
| Schedule of Regulatory Assets and Liabilities [Line Items] |
|
|
|
|
| Net regulatory assets |
0
|
(186)
|
|
|
| Over Recovered Regulatory Clause Revenues | Southern Company Gas |
|
|
|
|
| Schedule of Regulatory Assets and Liabilities [Line Items] |
|
|
|
|
| Net regulatory assets |
$ (204)
|
(1,771)
|
|
|
| Regulatory liability amortization period |
5 years
|
|
|
|
| Reliability reserves |
|
|
|
|
| Schedule of Regulatory Assets and Liabilities [Line Items] |
|
|
|
|
| Net regulatory assets |
$ (188)
|
(179)
|
|
|
| Reliability reserves | Alabama Power |
|
|
|
|
| Schedule of Regulatory Assets and Liabilities [Line Items] |
|
|
|
|
| Net regulatory assets |
(131)
|
(143)
|
|
|
| Reliability reserves | Georgia Power |
|
|
|
|
| Schedule of Regulatory Assets and Liabilities [Line Items] |
|
|
|
|
| Net regulatory assets |
0
|
0
|
|
|
| Reliability reserves | Mississippi Power |
|
|
|
|
| Schedule of Regulatory Assets and Liabilities [Line Items] |
|
|
|
|
| Net regulatory assets |
(57)
|
(36)
|
|
|
| Reliability reserves | Southern Company Gas |
|
|
|
|
| Schedule of Regulatory Assets and Liabilities [Line Items] |
|
|
|
|
| Net regulatory assets |
0
|
0
|
|
|
| Storm/Property Damage Reserves |
|
|
|
|
| Schedule of Regulatory Assets and Liabilities [Line Items] |
|
|
|
|
| Net regulatory assets |
(122)
|
(120)
|
|
|
| Storm/Property Damage Reserves | Alabama Power |
|
|
|
|
| Schedule of Regulatory Assets and Liabilities [Line Items] |
|
|
|
|
| Net regulatory assets |
(70)
|
(76)
|
|
|
| Storm/Property Damage Reserves | Georgia Power |
|
|
|
|
| Schedule of Regulatory Assets and Liabilities [Line Items] |
|
|
|
|
| Net regulatory assets |
0
|
0
|
|
|
| Storm/Property Damage Reserves | Mississippi Power |
|
|
|
|
| Schedule of Regulatory Assets and Liabilities [Line Items] |
|
|
|
|
| Net regulatory assets |
(52)
|
(44)
|
|
|
| Storm/Property Damage Reserves | Southern Company Gas |
|
|
|
|
| Schedule of Regulatory Assets and Liabilities [Line Items] |
|
|
|
|
| Net regulatory assets |
0
|
0
|
|
|
| Nuclear Fuel Disposal Cost Recovery |
|
|
|
|
| Schedule of Regulatory Assets and Liabilities [Line Items] |
|
|
|
|
| Net regulatory assets |
(100)
|
|
|
|
| Nuclear Fuel Disposal Cost Recovery | Alabama Power |
|
|
|
|
| Schedule of Regulatory Assets and Liabilities [Line Items] |
|
|
|
|
| Net regulatory assets |
(100)
|
|
|
|
| Nuclear Fuel Disposal Cost Recovery | Georgia Power |
|
|
|
|
| Schedule of Regulatory Assets and Liabilities [Line Items] |
|
|
|
|
| Net regulatory assets |
0
|
|
|
|
| Nuclear Fuel Disposal Cost Recovery | Mississippi Power |
|
|
|
|
| Schedule of Regulatory Assets and Liabilities [Line Items] |
|
|
|
|
| Net regulatory assets |
0
|
|
|
|
| Nuclear Fuel Disposal Cost Recovery | Southern Company Gas |
|
|
|
|
| Schedule of Regulatory Assets and Liabilities [Line Items] |
|
|
|
|
| Net regulatory assets |
0
|
|
|
|
| Other Regulatory Liabilities |
|
|
|
|
| Schedule of Regulatory Assets and Liabilities [Line Items] |
|
|
|
|
| Net regulatory assets |
(180)
|
(333)
|
|
|
| Other Regulatory Liabilities | Alabama Power |
|
|
|
|
| Schedule of Regulatory Assets and Liabilities [Line Items] |
|
|
|
|
| Net regulatory assets |
$ (28)
|
(94)
|
|
|
| Regulatory liability amortization period |
1 year
|
|
|
|
| Other Regulatory Liabilities | Georgia Power |
|
|
|
|
| Schedule of Regulatory Assets and Liabilities [Line Items] |
|
|
|
|
| Net regulatory assets |
$ (14)
|
(23)
|
|
|
| Regulatory liability amortization period |
3 years
|
|
|
|
| Other Regulatory Liabilities | Mississippi Power |
|
|
|
|
| Schedule of Regulatory Assets and Liabilities [Line Items] |
|
|
|
|
| Net regulatory assets |
$ (6)
|
(2)
|
|
|
| Regulatory liability amortization period |
1 year
|
|
|
|
| Other Regulatory Liabilities | Southern Company Gas |
|
|
|
|
| Schedule of Regulatory Assets and Liabilities [Line Items] |
|
|
|
|
| Net regulatory assets |
$ (31)
|
(101)
|
|
|
| Regulatory liability amortization period |
20 years
|
|
|
|
| Deferred Income Tax Charges | Georgia Power | Plant Vogtle Units 3 and 4 |
|
|
|
|
| Schedule of Regulatory Assets and Liabilities [Line Items] |
|
|
|
|
| Regulatory liabilities |
$ 102
|
|
|
|
| Deferred Income Tax Charges | Southern Company Gas | Plant Vogtle Units 3 and 4 |
|
|
|
|
| Schedule of Regulatory Assets and Liabilities [Line Items] |
|
|
|
|
| Regulatory liabilities |
24
|
|
|
|
| AROs |
|
|
|
|
| Schedule of Regulatory Assets and Liabilities [Line Items] |
|
|
|
|
| Net regulatory assets |
5,810
|
5,733
|
|
|
| AROs | Alabama Power |
|
|
|
|
| Schedule of Regulatory Assets and Liabilities [Line Items] |
|
|
|
|
| Net regulatory assets |
$ 1,906
|
1,936
|
|
|
| AROs | Alabama Power | Maximum |
|
|
|
|
| Schedule of Regulatory Assets and Liabilities [Line Items] |
|
|
|
|
| Regulatory asset amortization period |
64 years
|
|
|
|
| AROs | Georgia Power |
|
|
|
|
| Schedule of Regulatory Assets and Liabilities [Line Items] |
|
|
|
|
| Net regulatory assets |
$ 3,658
|
3,505
|
|
|
| AROs | Georgia Power | Maximum |
|
|
|
|
| Schedule of Regulatory Assets and Liabilities [Line Items] |
|
|
|
|
| Regulatory asset amortization period |
54 years
|
|
|
|
| AROs | Mississippi Power |
|
|
|
|
| Schedule of Regulatory Assets and Liabilities [Line Items] |
|
|
|
|
| Net regulatory assets |
$ 248
|
247
|
|
|
| AROs | Mississippi Power | Maximum |
|
|
|
|
| Schedule of Regulatory Assets and Liabilities [Line Items] |
|
|
|
|
| Regulatory asset amortization period |
67 years
|
|
|
|
| AROs | Southern Company Gas |
|
|
|
|
| Schedule of Regulatory Assets and Liabilities [Line Items] |
|
|
|
|
| Net regulatory assets |
$ 0
|
0
|
|
|
| AROs | Southern Company Gas | Maximum |
|
|
|
|
| Schedule of Regulatory Assets and Liabilities [Line Items] |
|
|
|
|
| Regulatory asset amortization period |
85 years
|
|
|
|
| Retiree Benefit Plans |
|
|
|
|
| Schedule of Regulatory Assets and Liabilities [Line Items] |
|
|
|
|
| Net regulatory assets |
$ 2,605
|
3,011
|
|
|
| Retiree Benefit Plans | Alabama Power |
|
|
|
|
| Schedule of Regulatory Assets and Liabilities [Line Items] |
|
|
|
|
| Net regulatory assets |
$ 680
|
815
|
|
|
| Retiree Benefit Plans | Alabama Power | Maximum |
|
|
|
|
| Schedule of Regulatory Assets and Liabilities [Line Items] |
|
|
|
|
| Regulatory asset amortization period |
14 years
|
|
|
|
| Retiree Benefit Plans | Georgia Power |
|
|
|
|
| Schedule of Regulatory Assets and Liabilities [Line Items] |
|
|
|
|
| Net regulatory assets |
$ 892
|
976
|
|
|
| Retiree Benefit Plans | Mississippi Power |
|
|
|
|
| Schedule of Regulatory Assets and Liabilities [Line Items] |
|
|
|
|
| Net regulatory assets |
$ 134
|
140
|
|
|
| Retiree Benefit Plans | Mississippi Power | Maximum |
|
|
|
|
| Schedule of Regulatory Assets and Liabilities [Line Items] |
|
|
|
|
| Regulatory asset amortization period |
14 years
|
|
|
|
| Retiree Benefit Plans | Southern Company Gas |
|
|
|
|
| Schedule of Regulatory Assets and Liabilities [Line Items] |
|
|
|
|
| Net regulatory assets |
$ 44
|
146
|
|
|
| Remaining Net Book Value of Retired Assets |
|
|
|
|
| Schedule of Regulatory Assets and Liabilities [Line Items] |
|
|
|
|
| Net regulatory assets |
1,198
|
1,357
|
|
|
| Remaining Net Book Value of Retired Assets | Alabama Power |
|
|
|
|
| Schedule of Regulatory Assets and Liabilities [Line Items] |
|
|
|
|
| Net regulatory assets |
454
|
499
|
|
|
| Remaining Net Book Value of Retired Assets | Alabama Power | Plant Gorgas Units 8, 9, And 10 |
|
|
|
|
| Schedule of Regulatory Assets and Liabilities [Line Items] |
|
|
|
|
| Net regulatory assets |
419
|
|
|
|
| Remaining Net Book Value of Retired Assets | Alabama Power | Plant Barry Unit 4 |
|
|
|
|
| Schedule of Regulatory Assets and Liabilities [Line Items] |
|
|
|
|
| Net regulatory assets |
$ 35
|
|
|
|
| Regulatory asset amortization period |
10 years
|
|
|
|
| Remaining Net Book Value of Retired Assets | Alabama Power | Maximum | Plant Gorgas Units 8, 9, And 10 |
|
|
|
|
| Schedule of Regulatory Assets and Liabilities [Line Items] |
|
|
|
|
| Regulatory asset amortization period |
13 years
|
|
|
|
| Remaining Net Book Value of Retired Assets | Georgia Power |
|
|
|
|
| Schedule of Regulatory Assets and Liabilities [Line Items] |
|
|
|
|
| Net regulatory assets |
$ 729
|
841
|
|
|
| Remaining Net Book Value of Retired Assets | Georgia Power | Plant Wansley Units 1 and 2 |
|
|
|
|
| Schedule of Regulatory Assets and Liabilities [Line Items] |
|
|
|
|
| Net regulatory assets |
418
|
|
|
|
| Remaining Net Book Value of Retired Assets | Georgia Power | Plant Hammond Units 1 - 4 and Plant Branch Units 2 - 4 |
|
|
|
|
| Schedule of Regulatory Assets and Liabilities [Line Items] |
|
|
|
|
| Net regulatory assets |
$ 302
|
|
|
|
| Remaining Net Book Value of Retired Assets | Georgia Power | Maximum | Plant Hammond Units 1 - 4 and Plant Branch Units 2 - 4 |
|
|
|
|
| Schedule of Regulatory Assets and Liabilities [Line Items] |
|
|
|
|
| Regulatory asset amortization period |
11 years
|
|
|
|
| Remaining Net Book Value of Retired Assets | Georgia Power | Minimum | Plant Hammond Units 1 - 4 and Plant Branch Units 2 - 4 |
|
|
|
|
| Schedule of Regulatory Assets and Liabilities [Line Items] |
|
|
|
|
| Regulatory asset amortization period |
1 year
|
|
|
|
| Remaining Net Book Value of Retired Assets | Mississippi Power |
|
|
|
|
| Schedule of Regulatory Assets and Liabilities [Line Items] |
|
|
|
|
| Net regulatory assets |
$ 15
|
17
|
|
|
| Remaining Net Book Value of Retired Assets | Mississippi Power | Plant Watson and Plant Greene County | Retail electric revenues |
|
|
|
|
| Schedule of Regulatory Assets and Liabilities [Line Items] |
|
|
|
|
| Regulatory asset amortization period |
10 years
|
|
|
|
| Remaining Net Book Value of Retired Assets | Mississippi Power | Plant Watson and Plant Greene County | Wholesale electric revenues |
|
|
|
|
| Schedule of Regulatory Assets and Liabilities [Line Items] |
|
|
|
|
| Regulatory asset amortization period |
10 years
|
|
|
|
| Remaining Net Book Value of Retired Assets | Southern Company Gas |
|
|
|
|
| Schedule of Regulatory Assets and Liabilities [Line Items] |
|
|
|
|
| Net regulatory assets |
$ 0
|
0
|
|
|
| Deferred Income Tax Charges |
|
|
|
|
| Schedule of Regulatory Assets and Liabilities [Line Items] |
|
|
|
|
| Net regulatory assets |
927
|
897
|
|
|
| Deferred Income Tax Charges | Alabama Power |
|
|
|
|
| Schedule of Regulatory Assets and Liabilities [Line Items] |
|
|
|
|
| Net regulatory assets |
264
|
262
|
|
|
| Deferred Income Tax Charges | Georgia Power |
|
|
|
|
| Schedule of Regulatory Assets and Liabilities [Line Items] |
|
|
|
|
| Net regulatory assets |
634
|
605
|
|
|
| Deferred Income Tax Charges | Georgia Power | Plant Vogtle Units 3 and 4 |
|
|
|
|
| Schedule of Regulatory Assets and Liabilities [Line Items] |
|
|
|
|
| Net regulatory assets |
$ 29
|
|
|
|
| Regulatory asset amortization period |
10 years
|
|
|
|
| Regulatory asset |
$ 135
|
|
|
|
| Deferred Income Tax Charges | Mississippi Power |
|
|
|
|
| Schedule of Regulatory Assets and Liabilities [Line Items] |
|
|
|
|
| Net regulatory assets |
27
|
28
|
|
|
| Deferred Income Tax Charges | Southern Company Gas |
|
|
|
|
| Schedule of Regulatory Assets and Liabilities [Line Items] |
|
|
|
|
| Net regulatory assets |
0
|
0
|
|
|
| Under Recovered Regulatory Clause Revenues |
|
|
|
|
| Schedule of Regulatory Assets and Liabilities [Line Items] |
|
|
|
|
| Net regulatory assets |
167
|
413
|
|
|
| Under Recovered Regulatory Clause Revenues | Alabama Power |
|
|
|
|
| Schedule of Regulatory Assets and Liabilities [Line Items] |
|
|
|
|
| Net regulatory assets |
$ 119
|
381
|
|
|
| Under Recovered Regulatory Clause Revenues | Alabama Power | Maximum |
|
|
|
|
| Schedule of Regulatory Assets and Liabilities [Line Items] |
|
|
|
|
| Regulatory asset amortization period |
6 years
|
|
|
|
| Under Recovered Regulatory Clause Revenues | Georgia Power |
|
|
|
|
| Schedule of Regulatory Assets and Liabilities [Line Items] |
|
|
|
|
| Net regulatory assets |
$ 0
|
0
|
|
|
| Regulatory asset amortization period |
2 years
|
|
|
|
| Under Recovered Regulatory Clause Revenues | Mississippi Power |
|
|
|
|
| Schedule of Regulatory Assets and Liabilities [Line Items] |
|
|
|
|
| Net regulatory assets |
$ 17
|
12
|
|
|
| Under Recovered Regulatory Clause Revenues | Southern Company Gas |
|
|
|
|
| Schedule of Regulatory Assets and Liabilities [Line Items] |
|
|
|
|
| Net regulatory assets |
31
|
20
|
|
|
| Fuel Hedging (Realized And Unrealized) losses |
|
|
|
|
| Schedule of Regulatory Assets and Liabilities [Line Items] |
|
|
|
|
| Net regulatory assets |
69
|
270
|
|
|
| Fuel Hedging (Realized And Unrealized) losses | Alabama Power |
|
|
|
|
| Schedule of Regulatory Assets and Liabilities [Line Items] |
|
|
|
|
| Net regulatory assets |
23
|
100
|
|
|
| Regulatory asset amortization period |
|
|
|
5 years
|
| Fuel Hedging (Realized And Unrealized) losses | Georgia Power |
|
|
|
|
| Schedule of Regulatory Assets and Liabilities [Line Items] |
|
|
|
|
| Net regulatory assets |
29
|
121
|
|
|
| Fuel Hedging (Realized And Unrealized) losses | Mississippi Power |
|
|
|
|
| Schedule of Regulatory Assets and Liabilities [Line Items] |
|
|
|
|
| Net regulatory assets |
17
|
49
|
|
|
| Fuel Hedging (Realized And Unrealized) losses | Southern Company Gas |
|
|
|
|
| Schedule of Regulatory Assets and Liabilities [Line Items] |
|
|
|
|
| Net regulatory assets |
0
|
0
|
|
|
| Regulatory asset amortization period |
|
|
|
2 years
|
| Deferred Depreciation |
|
|
|
|
| Schedule of Regulatory Assets and Liabilities [Line Items] |
|
|
|
|
| Net regulatory assets |
535
|
270
|
|
|
| Deferred Depreciation | Plant Scherer Units 1 through 3 |
|
|
|
|
| Schedule of Regulatory Assets and Liabilities [Line Items] |
|
|
|
|
| Net regulatory assets |
$ 139
|
|
|
|
| Regulatory asset amortization period |
6 years
|
|
|
|
| Deferred Depreciation | Plant Bowen Units 1 and 2 |
|
|
|
|
| Schedule of Regulatory Assets and Liabilities [Line Items] |
|
|
|
|
| Net regulatory assets |
$ 80
|
|
|
|
| Deferred Depreciation | Alabama Power |
|
|
|
|
| Schedule of Regulatory Assets and Liabilities [Line Items] |
|
|
|
|
| Net regulatory assets |
286
|
143
|
|
|
| Deferred Depreciation | Alabama Power | Plant Barry Unit 5 |
|
|
|
|
| Schedule of Regulatory Assets and Liabilities [Line Items] |
|
|
|
|
| Net regulatory assets |
114
|
|
|
|
| Deferred Depreciation | Alabama Power | Plant Barry |
|
|
|
|
| Schedule of Regulatory Assets and Liabilities [Line Items] |
|
|
|
|
| Net regulatory assets |
48
|
|
|
|
| Deferred Depreciation | Alabama Power | Plant Gaston Unit 5 |
|
|
|
|
| Schedule of Regulatory Assets and Liabilities [Line Items] |
|
|
|
|
| Net regulatory assets |
124
|
|
|
|
| Deferred Depreciation | Georgia Power |
|
|
|
|
| Schedule of Regulatory Assets and Liabilities [Line Items] |
|
|
|
|
| Net regulatory assets |
249
|
127
|
|
|
| Deferred Depreciation | Mississippi Power |
|
|
|
|
| Schedule of Regulatory Assets and Liabilities [Line Items] |
|
|
|
|
| Net regulatory assets |
0
|
0
|
|
|
| Deferred Depreciation | Southern Company Gas |
|
|
|
|
| Schedule of Regulatory Assets and Liabilities [Line Items] |
|
|
|
|
| Net regulatory assets |
0
|
0
|
|
|
| Environmental Remediation |
|
|
|
|
| Schedule of Regulatory Assets and Liabilities [Line Items] |
|
|
|
|
| Net regulatory assets |
249
|
255
|
|
|
| Environmental Remediation | Alabama Power |
|
|
|
|
| Schedule of Regulatory Assets and Liabilities [Line Items] |
|
|
|
|
| Net regulatory assets |
0
|
0
|
|
|
| Environmental Remediation | Georgia Power |
|
|
|
|
| Schedule of Regulatory Assets and Liabilities [Line Items] |
|
|
|
|
| Net regulatory assets |
16
|
20
|
|
|
| Environmental Remediation | Mississippi Power |
|
|
|
|
| Schedule of Regulatory Assets and Liabilities [Line Items] |
|
|
|
|
| Net regulatory assets |
0
|
0
|
|
|
| Environmental Remediation | Southern Company Gas |
|
|
|
|
| Schedule of Regulatory Assets and Liabilities [Line Items] |
|
|
|
|
| Net regulatory assets |
233
|
235
|
|
|
| Loss on Reacquired Debt |
|
|
|
|
| Schedule of Regulatory Assets and Liabilities [Line Items] |
|
|
|
|
| Net regulatory assets |
219
|
238
|
|
|
| Loss on Reacquired Debt | Alabama Power |
|
|
|
|
| Schedule of Regulatory Assets and Liabilities [Line Items] |
|
|
|
|
| Net regulatory assets |
$ 32
|
35
|
|
|
| Loss on Reacquired Debt | Alabama Power | Maximum |
|
|
|
|
| Schedule of Regulatory Assets and Liabilities [Line Items] |
|
|
|
|
| Regulatory asset amortization period |
23 years
|
|
|
|
| Loss on Reacquired Debt | Georgia Power |
|
|
|
|
| Schedule of Regulatory Assets and Liabilities [Line Items] |
|
|
|
|
| Net regulatory assets |
$ 183
|
197
|
|
|
| Loss on Reacquired Debt | Georgia Power | Maximum |
|
|
|
|
| Schedule of Regulatory Assets and Liabilities [Line Items] |
|
|
|
|
| Regulatory asset amortization period |
28 years
|
|
|
|
| Loss on Reacquired Debt | Mississippi Power |
|
|
|
|
| Schedule of Regulatory Assets and Liabilities [Line Items] |
|
|
|
|
| Net regulatory assets |
$ 4
|
5
|
|
|
| Loss on Reacquired Debt | Mississippi Power | Maximum |
|
|
|
|
| Schedule of Regulatory Assets and Liabilities [Line Items] |
|
|
|
|
| Regulatory asset amortization period |
17 years
|
|
|
|
| Loss on Reacquired Debt | Southern Company Gas |
|
|
|
|
| Schedule of Regulatory Assets and Liabilities [Line Items] |
|
|
|
|
| Net regulatory assets |
$ 0
|
1
|
|
|
| Loss on Reacquired Debt | Southern Company Gas | Maximum |
|
|
|
|
| Schedule of Regulatory Assets and Liabilities [Line Items] |
|
|
|
|
| Regulatory asset amortization period |
3 years
|
|
|
|
| Vacation Pay |
|
|
|
|
| Schedule of Regulatory Assets and Liabilities [Line Items] |
|
|
|
|
| Net regulatory assets |
$ 224
|
217
|
|
|
| Regulatory asset amortization period |
1 year
|
|
|
|
| Vacation Pay | Alabama Power |
|
|
|
|
| Schedule of Regulatory Assets and Liabilities [Line Items] |
|
|
|
|
| Net regulatory assets |
$ 85
|
83
|
|
|
| Vacation Pay | Georgia Power |
|
|
|
|
| Schedule of Regulatory Assets and Liabilities [Line Items] |
|
|
|
|
| Net regulatory assets |
112
|
107
|
|
|
| Vacation Pay | Mississippi Power |
|
|
|
|
| Schedule of Regulatory Assets and Liabilities [Line Items] |
|
|
|
|
| Net regulatory assets |
12
|
11
|
|
|
| Vacation Pay | Southern Company Gas |
|
|
|
|
| Schedule of Regulatory Assets and Liabilities [Line Items] |
|
|
|
|
| Net regulatory assets |
15
|
16
|
|
|
| Software and Cloud Computing Costs |
|
|
|
|
| Schedule of Regulatory Assets and Liabilities [Line Items] |
|
|
|
|
| Net regulatory assets |
$ 200
|
150
|
|
|
| Regulatory asset amortization period |
5 years
|
|
|
|
| Software and Cloud Computing Costs | Alabama Power |
|
|
|
|
| Schedule of Regulatory Assets and Liabilities [Line Items] |
|
|
|
|
| Net regulatory assets |
$ 76
|
59
|
|
|
| Regulatory asset amortization period |
10 years
|
|
|
|
| Software and Cloud Computing Costs | Georgia Power |
|
|
|
|
| Schedule of Regulatory Assets and Liabilities [Line Items] |
|
|
|
|
| Net regulatory assets |
$ 116
|
84
|
|
|
| Software and Cloud Computing Costs | Mississippi Power |
|
|
|
|
| Schedule of Regulatory Assets and Liabilities [Line Items] |
|
|
|
|
| Net regulatory assets |
4
|
2
|
|
|
| Software and Cloud Computing Costs | Southern Company Gas |
|
|
|
|
| Schedule of Regulatory Assets and Liabilities [Line Items] |
|
|
|
|
| Net regulatory assets |
$ 4
|
5
|
|
|
| Regulatory asset amortization period |
10 years
|
|
|
|
| Regulatory Clauses |
|
|
|
|
| Schedule of Regulatory Assets and Liabilities [Line Items] |
|
|
|
|
| Net regulatory assets |
$ 162
|
140
|
|
|
| Regulatory Clauses | Alabama Power |
|
|
|
|
| Schedule of Regulatory Assets and Liabilities [Line Items] |
|
|
|
|
| Net regulatory assets |
82
|
112
|
|
|
| Regulatory Clauses | Georgia Power |
|
|
|
|
| Schedule of Regulatory Assets and Liabilities [Line Items] |
|
|
|
|
| Net regulatory assets |
0
|
0
|
|
|
| Regulatory Clauses | Mississippi Power |
|
|
|
|
| Schedule of Regulatory Assets and Liabilities [Line Items] |
|
|
|
|
| Net regulatory assets |
0
|
0
|
|
|
| Regulatory Clauses | Southern Company Gas |
|
|
|
|
| Schedule of Regulatory Assets and Liabilities [Line Items] |
|
|
|
|
| Net regulatory assets |
80
|
28
|
|
|
| Storm Damage |
|
|
|
|
| Schedule of Regulatory Assets and Liabilities [Line Items] |
|
|
|
|
| Net regulatory assets |
859
|
92
|
|
|
| Storm Damage | Alabama Power |
|
|
|
|
| Schedule of Regulatory Assets and Liabilities [Line Items] |
|
|
|
|
| Net regulatory assets |
0
|
0
|
|
|
| Storm Damage | Georgia Power |
|
|
|
|
| Schedule of Regulatory Assets and Liabilities [Line Items] |
|
|
|
|
| Net regulatory assets |
827
|
54
|
|
|
| Storm Damage | Mississippi Power |
|
|
|
|
| Schedule of Regulatory Assets and Liabilities [Line Items] |
|
|
|
|
| Net regulatory assets |
32
|
38
|
|
|
| Storm Damage | Southern Company Gas |
|
|
|
|
| Schedule of Regulatory Assets and Liabilities [Line Items] |
|
|
|
|
| Net regulatory assets |
0
|
0
|
|
|
| Nuclear Outage |
|
|
|
|
| Schedule of Regulatory Assets and Liabilities [Line Items] |
|
|
|
|
| Net regulatory assets |
92
|
83
|
|
|
| Nuclear Outage | Alabama Power |
|
|
|
|
| Schedule of Regulatory Assets and Liabilities [Line Items] |
|
|
|
|
| Net regulatory assets |
$ 39
|
50
|
|
|
| Nuclear Outage | Alabama Power | Plant Farley |
|
|
|
|
| Schedule of Regulatory Assets and Liabilities [Line Items] |
|
|
|
|
| Regulatory asset amortization period |
18 months
|
|
|
|
| Nuclear Outage | Georgia Power |
|
|
|
|
| Schedule of Regulatory Assets and Liabilities [Line Items] |
|
|
|
|
| Net regulatory assets |
$ 53
|
33
|
|
|
| Nuclear Outage | Georgia Power | Maximum | Plant Hatch (nuclear) Units 1 and 2 |
|
|
|
|
| Schedule of Regulatory Assets and Liabilities [Line Items] |
|
|
|
|
| Regulatory asset amortization period |
24 months
|
|
|
|
| Nuclear Outage | Mississippi Power |
|
|
|
|
| Schedule of Regulatory Assets and Liabilities [Line Items] |
|
|
|
|
| Net regulatory assets |
$ 0
|
0
|
|
|
| Nuclear Outage | Southern Company Gas |
|
|
|
|
| Schedule of Regulatory Assets and Liabilities [Line Items] |
|
|
|
|
| Net regulatory assets |
0
|
0
|
|
|
| Long Term Debt Fair Value Adjustment |
|
|
|
|
| Schedule of Regulatory Assets and Liabilities [Line Items] |
|
|
|
|
| Net regulatory assets |
52
|
60
|
|
|
| Long Term Debt Fair Value Adjustment | Alabama Power |
|
|
|
|
| Schedule of Regulatory Assets and Liabilities [Line Items] |
|
|
|
|
| Net regulatory assets |
0
|
0
|
|
|
| Long Term Debt Fair Value Adjustment | Georgia Power |
|
|
|
|
| Schedule of Regulatory Assets and Liabilities [Line Items] |
|
|
|
|
| Net regulatory assets |
0
|
0
|
|
|
| Long Term Debt Fair Value Adjustment | Mississippi Power |
|
|
|
|
| Schedule of Regulatory Assets and Liabilities [Line Items] |
|
|
|
|
| Net regulatory assets |
0
|
0
|
|
|
| Long Term Debt Fair Value Adjustment | Southern Company Gas |
|
|
|
|
| Schedule of Regulatory Assets and Liabilities [Line Items] |
|
|
|
|
| Net regulatory assets |
$ 52
|
60
|
|
|
| Long Term Debt Fair Value Adjustment | Southern Company Gas | Maximum |
|
|
|
|
| Schedule of Regulatory Assets and Liabilities [Line Items] |
|
|
|
|
| Regulatory asset amortization period |
14 years
|
|
|
|
| Qualifying Repairs Of Natural Gas Distribution Systems |
|
|
|
|
| Schedule of Regulatory Assets and Liabilities [Line Items] |
|
|
|
|
| Net regulatory assets |
$ 53
|
40
|
|
|
| Qualifying Repairs Of Natural Gas Distribution Systems | Alabama Power |
|
|
|
|
| Schedule of Regulatory Assets and Liabilities [Line Items] |
|
|
|
|
| Net regulatory assets |
0
|
0
|
|
|
| Qualifying Repairs Of Natural Gas Distribution Systems | Georgia Power |
|
|
|
|
| Schedule of Regulatory Assets and Liabilities [Line Items] |
|
|
|
|
| Net regulatory assets |
0
|
0
|
|
|
| Qualifying Repairs Of Natural Gas Distribution Systems | Mississippi Power |
|
|
|
|
| Schedule of Regulatory Assets and Liabilities [Line Items] |
|
|
|
|
| Net regulatory assets |
0
|
0
|
|
|
| Qualifying Repairs Of Natural Gas Distribution Systems | Southern Company Gas |
|
|
|
|
| Schedule of Regulatory Assets and Liabilities [Line Items] |
|
|
|
|
| Net regulatory assets |
$ 53
|
40
|
|
|
| Qualifying Repairs Of Natural Gas Distribution Systems | Atlanta Gas Light |
|
|
|
|
| Schedule of Regulatory Assets and Liabilities [Line Items] |
|
|
|
|
| Regulatory asset amortization period |
20 years
|
|
|
|
| Plant Daniel Units 3 and 4 |
|
|
|
|
| Schedule of Regulatory Assets and Liabilities [Line Items] |
|
|
|
|
| Net regulatory assets |
$ 23
|
25
|
|
|
| Plant Daniel Units 3 and 4 | Retail electric revenues |
|
|
|
|
| Schedule of Regulatory Assets and Liabilities [Line Items] |
|
|
|
|
| Net regulatory assets |
16
|
|
|
|
| Plant Daniel Units 3 and 4 | Wholesale electric revenues |
|
|
|
|
| Schedule of Regulatory Assets and Liabilities [Line Items] |
|
|
|
|
| Net regulatory assets |
8
|
|
|
|
| Plant Daniel Units 3 and 4 | Alabama Power |
|
|
|
|
| Schedule of Regulatory Assets and Liabilities [Line Items] |
|
|
|
|
| Net regulatory assets |
0
|
0
|
|
|
| Plant Daniel Units 3 and 4 | Georgia Power |
|
|
|
|
| Schedule of Regulatory Assets and Liabilities [Line Items] |
|
|
|
|
| Net regulatory assets |
0
|
0
|
|
|
| Plant Daniel Units 3 and 4 | Mississippi Power |
|
|
|
|
| Schedule of Regulatory Assets and Liabilities [Line Items] |
|
|
|
|
| Net regulatory assets |
23
|
25
|
|
|
| Plant Daniel Units 3 and 4 | Southern Company Gas |
|
|
|
|
| Schedule of Regulatory Assets and Liabilities [Line Items] |
|
|
|
|
| Net regulatory assets |
0
|
0
|
|
|
| Other Regulatory Assets |
|
|
|
|
| Schedule of Regulatory Assets and Liabilities [Line Items] |
|
|
|
|
| Net regulatory assets |
184
|
189
|
|
|
| Other Regulatory Assets | Alabama Power |
|
|
|
|
| Schedule of Regulatory Assets and Liabilities [Line Items] |
|
|
|
|
| Net regulatory assets |
$ 42
|
39
|
|
|
| Regulatory asset amortization period |
19 years
|
|
|
|
| Other Regulatory Assets | Georgia Power |
|
|
|
|
| Schedule of Regulatory Assets and Liabilities [Line Items] |
|
|
|
|
| Net regulatory assets |
$ 40
|
33
|
|
|
| Regulatory asset amortization period |
10 years
|
|
|
|
| Other Regulatory Assets | Mississippi Power |
|
|
|
|
| Schedule of Regulatory Assets and Liabilities [Line Items] |
|
|
|
|
| Net regulatory assets |
$ 30
|
25
|
|
|
| Regulatory asset amortization period |
10 years
|
|
|
|
| Other Regulatory Assets | Southern Company Gas |
|
|
|
|
| Schedule of Regulatory Assets and Liabilities [Line Items] |
|
|
|
|
| Net regulatory assets |
$ 72
|
$ 93
|
|
|
| Regulatory asset amortization period |
15 years
|
|
|
|
| CCR AROs | Alabama Power |
|
|
|
|
| Schedule of Regulatory Assets and Liabilities [Line Items] |
|
|
|
|
| Regulatory asset amortization period |
38 years
|
|
|
|
| CCR AROs | Georgia Power |
|
|
|
|
| Schedule of Regulatory Assets and Liabilities [Line Items] |
|
|
|
|
| Regulatory asset amortization period |
3 years
|
|
|
4 years
|
| Regulatory Clauses, Amortized Through PEP | Mississippi Power |
|
|
|
|
| Schedule of Regulatory Assets and Liabilities [Line Items] |
|
|
|
|
| Net regulatory assets |
$ 17
|
|
|
|