Consolidated Balance Sheets - USD ($) $ in Millions |
Dec. 31, 2018 |
Dec. 31, 2017 |
| Current Assets: |
|
|
| Cash and cash equivalents |
$ 1,396
|
$ 2,130
|
| Receivables — |
|
|
| Customer accounts receivable |
1,726
|
1,806
|
| Energy marketing receivable |
801
|
607
|
| Unbilled revenues |
654
|
810
|
| Under recovered fuel clause revenues |
115
|
171
|
| Other accounts and notes receivable |
813
|
698
|
| Accumulated provision for uncollectible accounts |
(50)
|
(44)
|
| Materials and supplies |
1,465
|
1,438
|
| Fossil fuel for generation |
405
|
594
|
| Natural gas for sale |
524
|
595
|
| Prepaid expenses |
432
|
452
|
| Assets from risk management activities, net of collateral |
222
|
137
|
| Other regulatory assets, current |
525
|
604
|
| Assets held for sale, current |
393
|
12
|
| Other current assets |
162
|
62
|
| Total current assets |
9,583
|
10,072
|
| Property, Plant, and Equipment: |
|
|
| In service |
103,706
|
103,542
|
| Less: Accumulated depreciation |
31,038
|
31,457
|
| Plant in service, net of depreciation |
72,668
|
72,085
|
| Nuclear fuel, at amortized cost |
875
|
883
|
| Construction work in progress |
7,254
|
6,904
|
| Total property, plant, and equipment |
80,797
|
79,872
|
| Other Property and Investments: |
|
|
| Goodwill |
5,315
|
6,268
|
| Equity investments in unconsolidated subsidiaries |
1,580
|
1,513
|
| Other intangible assets, net of amortization |
613
|
873
|
| Nuclear decommissioning trusts, at fair value |
1,721
|
1,832
|
| Leveraged leases |
798
|
775
|
| Miscellaneous property and investments |
269
|
249
|
| Total other property and investments |
10,296
|
11,510
|
| Deferred Charges and Other Assets: |
|
|
| Deferred charges related to income taxes |
794
|
825
|
| Unamortized loss on reacquired debt |
323
|
206
|
| Other regulatory assets |
8,308
|
6,943
|
| Disposal Group, Including Discontinued Operation, Assets, Noncurrent |
5,350
|
0
|
| Other deferred charges and assets |
1,463
|
1,577
|
| Total deferred charges and other assets |
16,238
|
9,551
|
| Total Assets |
116,914
|
111,005
|
| Current Liabilities: |
|
|
| Securities due within one year |
3,198
|
3,892
|
| Notes payable |
2,915
|
2,439
|
| Accounts payable — |
|
|
| Energy marketing trade payables |
856
|
546
|
| Accounts payable |
2,580
|
2,530
|
| Customer deposits |
522
|
542
|
| Accrued taxes |
656
|
636
|
| Accrued interest |
472
|
488
|
| Accrued compensation |
1,030
|
959
|
| Asset retirement obligations, current |
404
|
351
|
| Other regulatory liabilities, current |
376
|
337
|
| Liabilities held for sale, current |
425
|
0
|
| Other current liabilities |
852
|
874
|
| Total current liabilities |
14,286
|
13,594
|
| Long-Term Debt: |
|
|
| Unamortized debt issuance expense |
(208)
|
(226)
|
| Total long-term debt |
40,736
|
44,462
|
| Deferred Credits and Other Liabilities: |
|
|
| Accumulated deferred income taxes |
6,558
|
6,842
|
| Deferred credits related to income taxes |
6,460
|
7,256
|
| Accumulated deferred ITCs |
2,372
|
2,267
|
| Employee benefit obligations |
2,147
|
2,256
|
| Asset retirement obligations |
8,990
|
4,473
|
| Accrued environmental remediation |
268
|
389
|
| Other cost of removal obligations |
2,297
|
2,684
|
| Other regulatory liabilities |
169
|
239
|
| Liabilities held for sale |
2,836
|
0
|
| Other deferred credits and liabilities |
465
|
691
|
| Total deferred credits and other liabilities |
32,562
|
27,097
|
| Total Liabilities |
87,584
|
85,153
|
| Common Stockholder's Equity: |
|
|
| Common stock |
5,164
|
5,038
|
| Paid-in capital |
11,094
|
10,469
|
| Retained earnings |
8,706
|
8,885
|
| Accumulated other comprehensive income (loss) |
(203)
|
(189)
|
| Total common stockholders' equity |
24,723
|
24,167
|
| Redeemable Preferred Stock of Subsidiaries |
291
|
324
|
| Total Stockholders' Equity |
29,039
|
25,528
|
| Total Liabilities and Stockholder's Equity |
116,914
|
111,005
|
| Commitments and Contingent Matters |
|
|
| Alabama Power |
|
|
| Current Assets: |
|
|
| Cash and cash equivalents |
313
|
544
|
| Receivables — |
|
|
| Customer accounts receivable |
403
|
355
|
| Unbilled revenues |
150
|
162
|
| Other accounts and notes receivable |
51
|
55
|
| Affiliated |
94
|
43
|
| Accumulated provision for uncollectible accounts |
(10)
|
(9)
|
| Materials and supplies |
546
|
458
|
| Fossil fuel for generation |
141
|
184
|
| Prepaid expenses |
66
|
85
|
| Other regulatory assets, current |
137
|
124
|
| Other current assets |
18
|
5
|
| Total current assets |
1,909
|
2,006
|
| Property, Plant, and Equipment: |
|
|
| In service |
30,402
|
27,326
|
| Less: Accumulated depreciation |
9,988
|
9,563
|
| Plant in service, net of depreciation |
20,414
|
17,763
|
| Nuclear fuel, at amortized cost |
324
|
339
|
| Construction work in progress |
1,113
|
908
|
| Total property, plant, and equipment |
21,851
|
19,010
|
| Other Property and Investments: |
|
|
| Equity investments in unconsolidated subsidiaries |
65
|
67
|
| Nuclear decommissioning trusts, at fair value |
847
|
903
|
| Miscellaneous property and investments |
127
|
124
|
| Total other property and investments |
1,039
|
1,094
|
| Deferred Charges and Other Assets: |
|
|
| Deferred charges related to income taxes |
240
|
239
|
| Deferred under recovered regulatory clause revenues |
116
|
54
|
| Other regulatory assets |
1,386
|
1,272
|
| Other deferred charges and assets |
189
|
189
|
| Total deferred charges and other assets |
1,931
|
1,754
|
| Total Assets |
26,730
|
23,864
|
| Current Liabilities: |
|
|
| Securities due within one year |
201
|
0
|
| Accounts payable — |
|
|
| Affiliated |
364
|
327
|
| Other |
614
|
585
|
| Customer deposits |
96
|
92
|
| Accrued taxes |
44
|
54
|
| Accrued interest |
89
|
77
|
| Accrued compensation |
227
|
205
|
| Asset retirement obligations, current |
163
|
7
|
| Other current liabilities |
161
|
53
|
| Total current liabilities |
1,959
|
1,400
|
| Long-Term Debt: |
|
|
| Unamortized debt premium (discount), net |
(12)
|
(11)
|
| Unamortized debt issuance expense |
(54)
|
(51)
|
| Total long-term debt |
7,923
|
7,628
|
| Deferred Credits and Other Liabilities: |
|
|
| Accumulated deferred income taxes |
2,962
|
2,760
|
| Deferred credits related to income taxes |
2,027
|
2,082
|
| Accumulated deferred ITCs |
106
|
112
|
| Employee benefit obligations |
314
|
304
|
| Asset retirement obligations |
3,047
|
1,702
|
| Other cost of removal obligations |
497
|
609
|
| Other regulatory liabilities |
69
|
84
|
| Other deferred credits and liabilities |
58
|
63
|
| Total deferred credits and other liabilities |
9,080
|
7,716
|
| Total Liabilities |
18,962
|
16,744
|
| Redeemable Preferred Stock |
291
|
291
|
| Common Stockholder's Equity: |
|
|
| Common stock |
1,222
|
1,222
|
| Paid-in capital |
3,508
|
2,986
|
| Retained earnings |
2,775
|
2,647
|
| Accumulated other comprehensive income (loss) |
(28)
|
(26)
|
| Total common stockholders' equity |
7,477
|
6,829
|
| Redeemable Preferred Stock of Subsidiaries |
291
|
291
|
| Total Stockholders' Equity |
7,477
|
6,829
|
| Total Liabilities and Stockholder's Equity |
26,730
|
23,864
|
| Commitments and Contingent Matters |
|
|
| Georgia Power |
|
|
| Current Assets: |
|
|
| Cash and cash equivalents |
4
|
852
|
| Restricted cash |
108
|
0
|
| Receivables — |
|
|
| Customer accounts receivable |
591
|
544
|
| Unbilled revenues |
208
|
255
|
| Under recovered fuel clause revenues |
115
|
165
|
| Joint owner accounts receivable |
170
|
262
|
| Other accounts and notes receivable |
80
|
76
|
| Affiliated |
39
|
24
|
| Accumulated provision for uncollectible accounts |
(2)
|
(3)
|
| Materials and supplies |
519
|
504
|
| Fossil fuel for generation |
231
|
314
|
| Prepaid expenses |
142
|
216
|
| Other regulatory assets, current |
199
|
205
|
| Other current assets |
70
|
14
|
| Total current assets |
2,474
|
3,428
|
| Property, Plant, and Equipment: |
|
|
| In service |
37,675
|
34,861
|
| Less: Accumulated depreciation |
12,096
|
11,704
|
| Plant in service, net of depreciation |
25,579
|
23,157
|
| Nuclear fuel, at amortized cost |
550
|
544
|
| Construction work in progress |
4,833
|
4,613
|
| Total property, plant, and equipment |
30,962
|
28,314
|
| Other Property and Investments: |
|
|
| Equity investments in unconsolidated subsidiaries |
51
|
53
|
| Nuclear decommissioning trusts, at fair value |
873
|
929
|
| Miscellaneous property and investments |
72
|
59
|
| Total other property and investments |
996
|
1,041
|
| Deferred Charges and Other Assets: |
|
|
| Deferred charges related to income taxes |
517
|
516
|
| Other regulatory assets |
4,902
|
2,932
|
| Other deferred charges and assets |
514
|
548
|
| Total deferred charges and other assets |
5,933
|
3,996
|
| Total Assets |
40,365
|
36,779
|
| Current Liabilities: |
|
|
| Securities due within one year |
617
|
857
|
| Notes payable |
294
|
150
|
| Accounts payable — |
|
|
| Affiliated |
575
|
493
|
| Other |
890
|
834
|
| Customer deposits |
276
|
270
|
| Other accrued taxes |
377
|
344
|
| Accrued interest |
105
|
123
|
| Accrued compensation |
221
|
219
|
| Asset retirement obligations, current |
202
|
270
|
| Other regulatory liabilities, current |
169
|
191
|
| Other current liabilities |
183
|
198
|
| Total current liabilities |
3,909
|
3,949
|
| Long-Term Debt: |
|
|
| Unamortized debt premium (discount), net |
(6)
|
(12)
|
| Unamortized debt issuance expense |
(108)
|
(124)
|
| Total long-term debt |
9,364
|
11,073
|
| Deferred Credits and Other Liabilities: |
|
|
| Accumulated deferred income taxes |
3,062
|
3,175
|
| Deferred credits related to income taxes |
3,080
|
3,248
|
| Accumulated deferred ITCs |
262
|
248
|
| Employee benefit obligations |
599
|
659
|
| Asset retirement obligations |
5,627
|
2,368
|
| Accrued environmental remediation |
0
|
0
|
| Other deferred credits and liabilities |
139
|
128
|
| Total deferred credits and other liabilities |
12,769
|
9,826
|
| Total Liabilities |
26,042
|
24,848
|
| Common Stockholder's Equity: |
|
|
| Common stock |
398
|
398
|
| Paid-in capital |
10,322
|
7,328
|
| Retained earnings |
3,612
|
4,215
|
| Accumulated other comprehensive income (loss) |
(9)
|
(10)
|
| Total common stockholders' equity |
14,323
|
11,931
|
| Total Stockholders' Equity |
14,323
|
11,931
|
| Total Liabilities and Stockholder's Equity |
40,365
|
36,779
|
| Commitments and Contingent Matters |
|
|
| Mississippi Power |
|
|
| Current Assets: |
|
|
| Cash and cash equivalents |
293
|
248
|
| Receivables — |
|
|
| Customer accounts receivable |
34
|
36
|
| Unbilled revenues |
41
|
41
|
| Other accounts and notes receivable |
31
|
16
|
| Affiliated |
21
|
16
|
| Materials and supplies |
53
|
44
|
| Fossil fuel for generation |
20
|
17
|
| Other regulatory assets, current |
116
|
125
|
| Prepaid income taxes |
12
|
0
|
| Other current assets |
7
|
9
|
| Total current assets |
628
|
552
|
| Property, Plant, and Equipment: |
|
|
| In service |
4,900
|
4,773
|
| Less: Accumulated depreciation |
1,429
|
1,325
|
| Plant in service, net of depreciation |
3,471
|
3,448
|
| Construction work in progress |
103
|
84
|
| Total property, plant, and equipment |
3,574
|
3,532
|
| Other Property and Investments: |
|
|
| Total other property and investments |
24
|
30
|
| Deferred Charges and Other Assets: |
|
|
| Deferred charges related to income taxes |
33
|
35
|
| Other regulatory assets |
474
|
437
|
| Accumulated deferred income taxes |
150
|
247
|
| Other deferred charges and assets |
3
|
33
|
| Total deferred charges and other assets |
660
|
752
|
| Total Assets |
4,886
|
4,866
|
| Current Liabilities: |
|
|
| Securities due within one year |
40
|
989
|
| Notes payable |
0
|
4
|
| Accounts payable — |
|
|
| Affiliated |
60
|
59
|
| Other |
90
|
96
|
| Accrued taxes |
0
|
40
|
| Other accrued taxes |
95
|
101
|
| Accrued interest |
15
|
16
|
| Accrued compensation |
38
|
39
|
| Accrued plant closure costs |
29
|
35
|
| Asset retirement obligations, current |
34
|
37
|
| Over recovered regulatory clause liabilities |
14
|
0
|
| Other current liabilities |
40
|
47
|
| Total current liabilities |
455
|
1,463
|
| Long-Term Debt: |
|
|
| Unamortized debt issuance expense |
(8)
|
(7)
|
| Total long-term debt |
1,539
|
1,097
|
| Deferred Credits and Other Liabilities: |
|
|
| Accumulated deferred income taxes |
378
|
0
|
| Deferred credits related to income taxes |
382
|
372
|
| Employee benefit obligations |
115
|
116
|
| Asset retirement obligations |
126
|
137
|
| Other cost of removal obligations |
185
|
178
|
| Other regulatory liabilities |
81
|
79
|
| Other deferred credits and liabilities |
16
|
33
|
| Total deferred credits and other liabilities |
1,283
|
915
|
| Total Liabilities |
3,277
|
3,475
|
| Redeemable Preferred Stock |
0
|
33
|
| Common Stockholder's Equity: |
|
|
| Common stock |
38
|
38
|
| Paid-in capital |
4,546
|
4,529
|
| Retained earnings |
(2,971)
|
(3,205)
|
| Accumulated other comprehensive income (loss) |
(4)
|
(4)
|
| Total common stockholders' equity |
1,609
|
1,358
|
| Redeemable Preferred Stock of Subsidiaries |
0
|
33
|
| Total Stockholders' Equity |
1,609
|
1,358
|
| Total Liabilities and Stockholder's Equity |
4,886
|
4,866
|
| Commitments and Contingent Matters |
|
|
| Southern Power |
|
|
| Current Assets: |
|
|
| Cash and cash equivalents |
181
|
129
|
| Receivables — |
|
|
| Customer accounts receivable |
111
|
117
|
| Other accounts and notes receivable |
116
|
98
|
| Affiliated |
55
|
50
|
| Materials and supplies |
220
|
278
|
| Prepaid income taxes |
25
|
50
|
| Other current assets |
37
|
36
|
| Total current assets |
745
|
758
|
| Property, Plant, and Equipment: |
|
|
| In service |
13,271
|
13,755
|
| Less: Accumulated depreciation |
2,171
|
1,910
|
| Plant in service, net of depreciation |
11,100
|
11,845
|
| Construction work in progress |
430
|
511
|
| Total property, plant, and equipment |
11,530
|
12,356
|
| Other Property and Investments: |
|
|
| Intangible assets, net of amortization |
345
|
411
|
| Total other property and investments |
345
|
411
|
| Deferred Charges and Other Assets: |
|
|
| Prepaid LTSAs |
98
|
118
|
| Income taxes receivable, non-current |
30
|
72
|
| Disposal Group, Including Discontinued Operation, Assets, Noncurrent |
576
|
0
|
| Accumulated deferred income taxes |
1,186
|
925
|
| Other deferred charges and assets |
373
|
566
|
| Total deferred charges and other assets |
2,263
|
1,681
|
| Total Assets |
14,883
|
15,206
|
| Current Liabilities: |
|
|
| Securities due within one year |
599
|
770
|
| Notes payable |
100
|
105
|
| Accounts payable — |
|
|
| Affiliated |
92
|
102
|
| Other |
77
|
103
|
| Accrued taxes |
6
|
4
|
| Liabilities held for sale, current |
15
|
0
|
| Other current liabilities |
142
|
148
|
| Total current liabilities |
1,031
|
1,232
|
| Long-Term Debt: |
|
|
| Unamortized debt premium (discount), net |
(9)
|
(10)
|
| Unamortized debt issuance expense |
(23)
|
(28)
|
| Total long-term debt |
4,418
|
5,071
|
| Deferred Credits and Other Liabilities: |
|
|
| Accumulated deferred income taxes |
105
|
199
|
| Accumulated deferred ITCs |
1,832
|
1,884
|
| Other deferred credits and liabilities |
213
|
322
|
| Total deferred credits and other liabilities |
2,150
|
2,405
|
| Total Liabilities |
7,599
|
8,708
|
| Common Stockholder's Equity: |
|
|
| Common stock |
0
|
0
|
| Paid-in capital |
1,600
|
3,662
|
| Retained earnings |
1,352
|
1,478
|
| Accumulated other comprehensive income (loss) |
16
|
(2)
|
| Total common stockholders' equity |
2,968
|
5,138
|
| Noncontrolling Interests |
4,316
|
1,360
|
| Total Stockholders' Equity |
7,284
|
6,498
|
| Total Liabilities and Stockholder's Equity |
14,883
|
15,206
|
| Commitments and Contingent Matters |
|
|
| Southern Power | 1.95% due 2019 |
|
|
| Long-Term Debt: |
|
|
| Senior notes |
0
|
600
|
| Southern Power | 2.375% due 2020 |
|
|
| Long-Term Debt: |
|
|
| Senior notes |
300
|
300
|
| Southern Power | 2.50% due 2021 |
|
|
| Long-Term Debt: |
|
|
| Senior notes |
300
|
300
|
| Southern Power | 1.00% due 2022 |
|
|
| Long-Term Debt: |
|
|
| Senior notes |
687
|
720
|
| Southern Power | 2.75% due 2023 |
|
|
| Long-Term Debt: |
|
|
| Senior notes |
290
|
290
|
| Southern Power | 1.85% to 5.25% due 2025-2046 |
|
|
| Long-Term Debt: |
|
|
| Senior notes |
2,348
|
2,374
|
| Southern Power | Variable rate (3.34% at 12/31/18) due 2020 |
|
|
| Long-Term Debt: |
|
|
| Other long-term debt |
525
|
525
|
| Southern Company Gas |
|
|
| Current Assets: |
|
|
| Cash and cash equivalents |
64
|
73
|
| Receivables — |
|
|
| Customer accounts receivable |
370
|
400
|
| Energy marketing receivable |
801
|
607
|
| Unbilled revenues |
213
|
285
|
| Other accounts and notes receivable |
142
|
91
|
| Affiliated |
11
|
12
|
| Accumulated provision for uncollectible accounts |
(30)
|
(28)
|
| Natural gas for sale |
524
|
595
|
| Prepaid expenses |
118
|
79
|
| Assets from risk management activities, net of collateral |
219
|
135
|
| Other regulatory assets, current |
73
|
94
|
| Other current assets |
50
|
52
|
| Total current assets |
2,555
|
2,395
|
| Property, Plant, and Equipment: |
|
|
| In service |
15,177
|
15,833
|
| Less: Accumulated depreciation |
4,400
|
4,596
|
| Plant in service, net of depreciation |
10,777
|
11,237
|
| Construction work in progress |
580
|
491
|
| Total property, plant, and equipment |
11,357
|
11,728
|
| Other Property and Investments: |
|
|
| Goodwill |
5,015
|
5,967
|
| Equity investments in unconsolidated subsidiaries |
1,538
|
1,477
|
| Other intangible assets, net of amortization |
101
|
280
|
| Miscellaneous property and investments |
20
|
21
|
| Total other property and investments |
6,674
|
7,745
|
| Deferred Charges and Other Assets: |
|
|
| Other regulatory assets |
669
|
901
|
| Other deferred charges and assets |
193
|
218
|
| Total deferred charges and other assets |
862
|
1,119
|
| Total Assets |
21,448
|
22,987
|
| Current Liabilities: |
|
|
| Securities due within one year |
357
|
157
|
| Notes payable |
650
|
1,518
|
| Accounts payable — |
|
|
| Affiliated |
45
|
21
|
| Other |
402
|
425
|
| Energy marketing trade payables |
856
|
546
|
| Customer deposits |
133
|
128
|
| Accrued taxes |
66
|
40
|
| Other accrued taxes |
75
|
78
|
| Accrued interest |
55
|
51
|
| Accrued compensation |
100
|
74
|
| Other regulatory liabilities, current |
79
|
135
|
| Liabilities from risk management activities |
76
|
69
|
| Other current liabilities |
130
|
159
|
| Total current liabilities |
3,024
|
3,401
|
| Long-Term Debt: |
|
|
| Total long-term debt |
5,583
|
5,891
|
| Deferred Credits and Other Liabilities: |
|
|
| Accumulated deferred income taxes |
1,016
|
1,089
|
| Deferred credits related to income taxes |
940
|
1,063
|
| Employee benefit obligations |
357
|
415
|
| Accrued environmental remediation |
268
|
342
|
| Other cost of removal obligations |
1,585
|
1,646
|
| Other deferred credits and liabilities |
105
|
118
|
| Total deferred credits and other liabilities |
4,271
|
4,673
|
| Total Liabilities |
12,878
|
13,965
|
| Common Stockholder's Equity: |
|
|
| Paid-in capital |
8,856
|
9,214
|
| Retained earnings |
(312)
|
(212)
|
| Accumulated other comprehensive income (loss) |
26
|
20
|
| Total common stockholders' equity |
8,570
|
9,022
|
| Total Stockholders' Equity |
8,570
|
9,022
|
| Total Liabilities and Stockholder's Equity |
21,448
|
22,987
|
| Commitments and Contingent Matters |
|
|
| Securities due within one year | Mississippi Power |
|
|
| Current Liabilities: |
|
|
| Securities due within one year |
$ 40
|
$ 989
|