Consolidated Statements of Capitalization - USD ($) $ in Millions |
Dec. 31, 2018 |
Dec. 31, 2017 |
| Long-Term Debt: |
|
|
| Long-term debt payable to affiliated trusts — variable rate (5.50% at 12/31/18) due 2042 |
$ 206
|
$ 206
|
| Maturity |
|
|
| 2019 |
3,156
|
|
| 2020 |
4,041
|
|
| 2021 |
3,186
|
|
| 2022 |
1,974
|
|
| 2023 |
2,388
|
|
| Total long-term senior notes and debt |
34,025
|
36,820
|
| Pollution control revenue bonds — |
|
|
| Pollution control revenue bonds |
2,585
|
3,297
|
| Total other long-term debt |
10,684
|
10,987
|
| Unamortized fair value adjustment of long-term debt |
474
|
525
|
| Capitalized lease obligations |
197
|
204
|
| Unamortized debt premium |
36
|
44
|
| Unamortized debt discount |
(194)
|
(206)
|
| Unamortized debt issuance expense |
(208)
|
(226)
|
| Total long-term debt |
45,220
|
48,354
|
| Amount due within one year |
3,198
|
3,892
|
| Amount held for sale |
1,286
|
0
|
| Long-term debt excluding amounts due within one year and held for sale |
$ 40,736
|
$ 44,462
|
| Percent capitalization |
58.10%
|
63.20%
|
| Cumulative preferred stock |
|
|
| Redeemable preferred stock |
$ 291
|
$ 324
|
| Total redeemable preferred stock - percent capitalization |
0.40%
|
0.50%
|
| Common Stockholders' Equity: |
|
|
| Common stock |
$ 5,164
|
$ 5,038
|
| Paid-in capital |
11,094
|
10,469
|
| Treasury, at cost |
(38)
|
(36)
|
| Retained earnings |
8,706
|
8,885
|
| Accumulated other comprehensive loss |
(203)
|
(189)
|
| Total common stockholders' equity |
$ 24,723
|
$ 24,167
|
| Total common stockholders' equity - percent capitalization |
35.30%
|
34.40%
|
| Total preferred and preference stock of subsidiaries - percent capitalization |
6.20%
|
1.90%
|
| Total Stockholders' Equity |
$ 29,039
|
$ 25,528
|
| Total Capitalization |
$ 70,066
|
$ 70,314
|
| Percent capitalization |
100.00%
|
100.00%
|
| Redeemable Preferred Stock, $100 par or stated value | Cumulative preferred stock |
|
|
| Cumulative preferred stock |
|
|
| Redeemable preferred stock |
$ 48
|
$ 81
|
| Redeemable Preferred Stock, $1 par value | Cumulative preferred stock |
|
|
| Cumulative preferred stock |
|
|
| Redeemable preferred stock |
243
|
243
|
| Noncontrolling interests |
|
|
| Common Stockholders' Equity: |
|
|
| Total preferred and preference stock of subsidiaries and noncontrolling interests |
4,316
|
1,361
|
| Senior Notes |
|
|
| Maturity |
|
|
| 2018 |
0
|
2,352
|
| 2019 |
2,948
|
3,074
|
| 2020 |
2,271
|
2,273
|
| 2021 |
2,638
|
2,643
|
| 2022 |
1,983
|
2,016
|
| 2023 |
2,290
|
2,290
|
| Thereafter |
19,895
|
19,902
|
| Adjustable Rate Loans |
|
|
| Maturity |
|
|
| 2018 |
0
|
1,420
|
| 2020 |
1,875
|
825
|
| 2021 |
125
|
25
|
| Pollution control revenue bonds due 2019 |
|
|
| Pollution control revenue bonds — |
|
|
| Pollution control revenue bonds |
25
|
25
|
| Pollution control revenue bonds due 2022 |
|
|
| Pollution control revenue bonds — |
|
|
| Pollution control revenue bonds |
90
|
90
|
| Pollution control revenue bonds due 2023 |
|
|
| Pollution control revenue bonds — |
|
|
| Pollution control revenue bonds |
33
|
33
|
| Pollution control revenue bonds due 2025 through 2049 |
|
|
| Pollution control revenue bonds — |
|
|
| Pollution control revenue bonds |
1,112
|
1,346
|
| Pollution control revenue bonds - variable rates (1.77 to 2.23% at 12/31/18) due 2019 |
|
|
| Pollution control revenue bonds — |
|
|
| Pollution control revenue bonds |
148
|
148
|
| Pollution control revenue bonds - variable rates (1.76% to 1.87% at 12/31/18) due 2021 |
|
|
| Pollution control revenue bonds — |
|
|
| Pollution control revenue bonds |
65
|
65
|
| Pollution control revenue bonds - variable rates (1.76% at 12/31/18) due 2022 |
|
|
| Pollution control revenue bonds — |
|
|
| Pollution control revenue bonds |
4
|
4
|
| Pollution control revenue bonds - variable rates (1.70% to 1.87% at 12/31/18) due 2024 to 2053 |
|
|
| Pollution control revenue bonds — |
|
|
| Pollution control revenue bonds |
1,417
|
1,585
|
| Plant Daniel revenue bonds (7.13%) due 2021 |
|
|
| Pollution control revenue bonds — |
|
|
| Plant Daniel revenue bonds (7.13%) due 2021 |
270
|
270
|
| Gas facility revenue bonds - variable rate (1.71% at 12/31/17) due 2022 |
|
|
| Pollution control revenue bonds — |
|
|
| Gas facility revenue bonds |
0
|
47
|
| Gas facility revenue bonds - variable rate (1.71% at 12/31/17) due 2024 to 2033 |
|
|
| Pollution control revenue bonds — |
|
|
| Gas facility revenue bonds |
0
|
154
|
| FFB loans — 2.57% to 3.86% due 2020 |
|
|
| Pollution control revenue bonds — |
|
|
| FFB loans |
44
|
44
|
| FFB loans — 2.57% to 3.86% due 2021 |
|
|
| Pollution control revenue bonds — |
|
|
| FFB loans |
44
|
44
|
| FFB loans — 2.57% to 3.86% due 2022 |
|
|
| Pollution control revenue bonds — |
|
|
| FFB loans |
44
|
44
|
| FFB loans — 2.57% to 3.86% due 2023 |
|
|
| Pollution control revenue bonds — |
|
|
| FFB loans |
44
|
44
|
| FFB loans — 2.57% to 3.86% due 2024 to 2044 |
|
|
| Pollution control revenue bonds — |
|
|
| FFB loans |
2,449
|
2,449
|
| First mortgage bonds — 4.70% due 2019 |
|
|
| Pollution control revenue bonds — |
|
|
| First mortgage bonds |
50
|
50
|
| First mortgage bonds - 5.80% due 2023 |
|
|
| Pollution control revenue bonds — |
|
|
| First mortgage bonds |
50
|
50
|
| First mortgage bonds — 2.66% to 6.58% due 2026 to 2057 |
|
|
| Pollution control revenue bonds — |
|
|
| First mortgage bonds |
1,225
|
925
|
| Alabama Power |
|
|
| Long-Term Debt: |
|
|
| Long-term debt payable to affiliated trusts — variable rate (5.50% at 12/31/18) due 2042 |
206
|
206
|
| Maturity |
|
|
| 2019 |
200
|
200
|
| 2020 |
250
|
250
|
| 2021 |
310
|
|
| 2022 |
750
|
750
|
| 2023 |
300
|
300
|
| Thereafter |
5,175
|
4,675
|
| Total long-term notes payable |
6,920
|
6,420
|
| Pollution control revenue bonds — |
|
|
| Pollution control revenue bonds |
1,060
|
1,060
|
| Total other long-term debt |
1,060
|
1,060
|
| Capitalized lease obligations |
4
|
4
|
| Unamortized debt premium (discount), net |
(12)
|
(11)
|
| Unamortized debt issuance expense |
(54)
|
(51)
|
| Total long-term debt |
8,124
|
7,628
|
| Amount due within one year |
201
|
0
|
| Long-term debt excluding amounts due within one year and held for sale |
$ 7,923
|
$ 7,628
|
| Percent capitalization |
50.40%
|
51.70%
|
| Cumulative preferred stock |
|
|
| Redeemable preferred stock |
$ 291
|
$ 291
|
| Total redeemable preferred stock - percent capitalization |
1.90%
|
2.00%
|
| Common Stockholders' Equity: |
|
|
| Common stock |
$ 1,222
|
$ 1,222
|
| Paid-in capital |
3,508
|
2,986
|
| Retained earnings |
2,775
|
2,647
|
| Accumulated other comprehensive loss |
(28)
|
(26)
|
| Total common stockholders' equity |
$ 7,477
|
$ 6,829
|
| Total common stockholders' equity - percent capitalization |
47.70%
|
46.30%
|
| Total Stockholders' Equity |
$ 7,477
|
$ 6,829
|
| Total Capitalization |
$ 15,691
|
$ 14,748
|
| Percent capitalization |
100.00%
|
100.00%
|
| Alabama Power | Redeemable Preferred Stock, $100 par or stated value | Cumulative preferred stock |
|
|
| Cumulative preferred stock |
|
|
| Redeemable preferred stock |
$ 48
|
$ 48
|
| Alabama Power | Redeemable Preferred Stock, $1 par value | Cumulative preferred stock |
|
|
| Cumulative preferred stock |
|
|
| Redeemable preferred stock |
243
|
243
|
| Alabama Power | Adjustable Rate Loans |
|
|
| Maturity |
|
|
| 2021 |
25
|
25
|
| Alabama Power | Long-term senior notes and debt maturing 2021 |
|
|
| Maturity |
|
|
| 2021 |
220
|
220
|
| Alabama Power | Pollution control revenue bonds - variable rates (1.76% to 1.87% at 12/31/18) due 2021 |
|
|
| Pollution control revenue bonds — |
|
|
| Pollution control revenue bonds |
65
|
65
|
| Alabama Power | Pollution control revenue bonds due 2034 |
|
|
| Pollution control revenue bonds — |
|
|
| Pollution control revenue bonds |
207
|
207
|
| Alabama Power | Pollution control revenue bonds - variable rates (1.70% to 1.80% at 12/31/18) due 2024-2038 |
|
|
| Pollution control revenue bonds — |
|
|
| Pollution control revenue bonds |
788
|
788
|
| Georgia Power |
|
|
| Maturity |
|
|
| 2018 |
0
|
747
|
| 2019 |
621
|
|
| 2020 |
1,006
|
|
| 2021 |
375
|
|
| 2022 |
505
|
|
| 2023 |
153
|
|
| Thereafter |
3,325
|
4,075
|
| Total long-term notes payable |
5,598
|
7,196
|
| Pollution control revenue bonds — |
|
|
| Pollution control revenue bonds |
1,460
|
1,821
|
| Total other long-term debt |
4,355
|
4,716
|
| Capitalized lease obligations |
142
|
154
|
| Unamortized debt premium (discount), net |
(6)
|
(12)
|
| Unamortized debt issuance expense |
(108)
|
(124)
|
| Total long-term debt |
9,981
|
11,930
|
| Amount due within one year |
617
|
857
|
| Long-term debt excluding amounts due within one year and held for sale |
$ 9,364
|
$ 11,073
|
| Percent capitalization |
39.50%
|
48.10%
|
| Common Stockholders' Equity: |
|
|
| Common stock |
$ 398
|
$ 398
|
| Paid-in capital |
10,322
|
7,328
|
| Retained earnings |
3,612
|
4,215
|
| Accumulated other comprehensive loss |
(9)
|
(10)
|
| Total common stockholders' equity |
$ 14,323
|
$ 11,931
|
| Total common stockholders' equity - percent capitalization |
60.50%
|
51.90%
|
| Total Stockholders' Equity |
$ 14,323
|
$ 11,931
|
| Total Capitalization |
$ 23,687
|
$ 23,004
|
| Percent capitalization |
100.00%
|
100.00%
|
| Georgia Power | Adjustable Rate Loans |
|
|
| Maturity |
|
|
| 2018 |
$ 0
|
$ 100
|
| Georgia Power | Long-term senior notes and debt maturing 2020 |
|
|
| Maturity |
|
|
| 2020 |
950
|
950
|
| Georgia Power | Long-term senior notes and debt maturing 2019 |
|
|
| Maturity |
|
|
| 2019 |
498
|
499
|
| Georgia Power | Long-term senior notes and debt maturing 2021 |
|
|
| Maturity |
|
|
| 2021 |
325
|
325
|
| Georgia Power | Long-term senior notes and debt maturing 2022 |
|
|
| Maturity |
|
|
| 2022 |
400
|
400
|
| Georgia Power | Long-term senior notes and debt maturing 2023 |
|
|
| Maturity |
|
|
| 2023 |
100
|
100
|
| Georgia Power | Pollution control revenue bonds due 2022 |
|
|
| Pollution control revenue bonds — |
|
|
| Pollution control revenue bonds |
53
|
53
|
| Georgia Power | Pollution control revenue bonds due 2025 through 2049 |
|
|
| Pollution control revenue bonds — |
|
|
| Pollution control revenue bonds |
748
|
940
|
| Georgia Power | Pollution control revenue bonds - variable rates (1.77% to 1.78% at 12/31/18) due 2019 |
|
|
| Pollution control revenue bonds — |
|
|
| Pollution control revenue bonds |
108
|
108
|
| Georgia Power | Pollution control revenue bonds - variable rates (0.00% to 0.00% at 12/31/18) due 2026-2052 |
|
|
| Pollution control revenue bonds — |
|
|
| Pollution control revenue bonds |
551
|
720
|
| Georgia Power | FFB loans — 2.57% to 3.86% due 2020 |
|
|
| Pollution control revenue bonds — |
|
|
| FFB loans |
44
|
44
|
| Georgia Power | FFB loans — 2.57% to 3.86% due 2021 |
|
|
| Pollution control revenue bonds — |
|
|
| FFB loans |
44
|
44
|
| Georgia Power | FFB loans — 2.57% to 3.86% due 2022 |
|
|
| Pollution control revenue bonds — |
|
|
| FFB loans |
44
|
44
|
| Georgia Power | FFB loans — 2.57% to 3.86% due 2023 |
|
|
| Pollution control revenue bonds — |
|
|
| FFB loans |
44
|
44
|
| Georgia Power | FFB loans — 2.57% to 3.86% due 2024 to 2044 |
|
|
| Pollution control revenue bonds — |
|
|
| FFB loans |
2,449
|
2,449
|
| Georgia Power | Junior subordinated notes (5.00% to 6.25%) due 2057 to 2077 |
|
|
| Pollution control revenue bonds — |
|
|
| Junior subordinated notes |
270
|
270
|
| Mississippi Power |
|
|
| Maturity |
|
|
| 2019 |
0
|
125
|
| 2020 |
307
|
|
| 2021 |
270
|
|
| 2022 |
0
|
|
| 2023 |
0
|
|
| Thereafter |
950
|
680
|
| Total long-term notes payable |
1,250
|
1,705
|
| Pollution control revenue bonds — |
|
|
| Pollution control revenue bonds |
40
|
83
|
| Total other long-term debt |
310
|
353
|
| Unamortized debt premium |
29
|
36
|
| Unamortized debt discount |
(2)
|
(1)
|
| Unamortized debt issuance expense |
(8)
|
(7)
|
| Total long-term debt |
1,579
|
2,086
|
| Amount due within one year |
40
|
989
|
| Long-term debt excluding amounts due within one year and held for sale |
$ 1,539
|
$ 1,097
|
| Percent capitalization |
48.90%
|
44.10%
|
| Cumulative preferred stock |
|
|
| Redeemable preferred stock |
$ 0
|
$ 33
|
| Total redeemable preferred stock - percent capitalization |
0.00%
|
1.30%
|
| Common Stockholders' Equity: |
|
|
| Common stock |
$ 38
|
$ 38
|
| Paid-in capital |
4,546
|
4,529
|
| Retained earnings |
(2,971)
|
(3,205)
|
| Accumulated other comprehensive loss |
(4)
|
(4)
|
| Total common stockholders' equity |
$ 1,609
|
$ 1,358
|
| Total common stockholders' equity - percent capitalization |
51.10%
|
54.60%
|
| Total Stockholders' Equity |
$ 1,609
|
$ 1,358
|
| Total Capitalization |
$ 3,148
|
$ 2,488
|
| Percent capitalization |
100.00%
|
100.00%
|
| Mississippi Power | Adjustable Rate Loans |
|
|
| Maturity |
|
|
| 2018 |
$ 0
|
$ 900
|
| 2020 |
300
|
0
|
| Mississippi Power | Pollution control revenue bonds due 2028 |
|
|
| Pollution control revenue bonds — |
|
|
| Pollution control revenue bonds |
0
|
43
|
| Mississippi Power | Pollution control revenue bonds - variable rates (1.77 to 2.23% at 12/31/18) due 2019 |
|
|
| Pollution control revenue bonds — |
|
|
| Pollution control revenue bonds |
40
|
40
|
| Mississippi Power | Plant Daniel revenue bonds (7.13%) due 2021 |
|
|
| Pollution control revenue bonds — |
|
|
| Plant Daniel revenue bonds (7.13%) due 2021 |
270
|
270
|
| Southern Company Gas |
|
|
| Maturity |
|
|
| 2018 |
0
|
155
|
| 2019 |
350
|
|
| 2020 |
0
|
|
| 2021 |
330
|
330
|
| 2022 |
46
|
46
|
| 2023 |
400
|
|
| Thereafter |
3,134
|
3,134
|
| Total long-term notes payable |
4,160
|
4,315
|
| Pollution control revenue bonds — |
|
|
| Total other long-term debt |
1,325
|
1,225
|
| Unamortized fair value adjustment of long-term debt |
474
|
525
|
| Unamortized debt discount |
(19)
|
(17)
|
| Total long-term debt |
5,940
|
6,048
|
| Amount due within one year |
357
|
157
|
| Long-term debt excluding amounts due within one year and held for sale |
$ 5,583
|
$ 5,891
|
| Percent capitalization |
39.40%
|
39.50%
|
| Common Stockholders' Equity: |
|
|
| Paid-in capital |
$ 8,856
|
$ 9,214
|
| Retained earnings |
(312)
|
(212)
|
| Accumulated other comprehensive loss |
26
|
20
|
| Total common stockholders' equity |
$ 8,570
|
$ 9,022
|
| Total common stockholders' equity - percent capitalization |
60.60%
|
60.50%
|
| Total Stockholders' Equity |
$ 8,570
|
$ 9,022
|
| Total Capitalization |
$ 14,153
|
$ 14,913
|
| Percent capitalization |
100.00%
|
100.00%
|
| Southern Company Gas | Long-term senior notes and debt maturing 2019 |
|
|
| Maturity |
|
|
| 2019 |
$ 300
|
$ 300
|
| Southern Company Gas | Long-term senior notes and debt maturing 2023 |
|
|
| Maturity |
|
|
| 2023 |
350
|
350
|
| Southern Company Gas | Gas facility revenue bonds - variable rate (1.71% at 12/31/17) due 2022 |
|
|
| Pollution control revenue bonds — |
|
|
| Gas facility revenue bonds |
0
|
47
|
| Southern Company Gas | Gas facility revenue bonds - variable rate (1.71% at 12/31/17) due 2024 to 2033 |
|
|
| Pollution control revenue bonds — |
|
|
| Gas facility revenue bonds |
0
|
153
|
| Southern Company Gas | First mortgage bonds — 4.70% due 2019 |
|
|
| Pollution control revenue bonds — |
|
|
| First mortgage bonds |
50
|
50
|
| Southern Company Gas | First mortgage bonds - 5.80% due 2023 |
|
|
| Pollution control revenue bonds — |
|
|
| First mortgage bonds |
50
|
50
|
| Southern Company Gas | First mortgage bonds — 2.66% to 6.58% due 2026 to 2057 |
|
|
| Pollution control revenue bonds — |
|
|
| First mortgage bonds |
$ 1,225
|
$ 925
|