Condensed Consolidated Balance Sheets (Unaudited) - USD ($) $ in Millions	Mar. 31, 2019	Dec. 31, 2018
Current Assets:
Cash and cash equivalents	$ 1,361	$ 1,396
Receivables —
Customer accounts receivable	1,715	1,726
Energy marketing receivables	529	801
Unbilled revenues	555	654
Under recovered fuel clause revenues	73	115
Other accounts and notes receivable	863	813
Accumulated provision for uncollectible accounts	(46)	(50)
Materials and supplies	1,477	1,465
Fossil fuel for generation	427	405
Natural gas for sale	189	524
Prepaid expenses	786	432
Assets from risk management activities, net of collateral	111	222
Other regulatory assets	482	525
Assets held for sale	55	393
Other current assets	132	162
Total current assets	8,709	9,583
Property, Plant, and Equipment:
In service	102,673	103,706
Less: Accumulated depreciation	30,834	31,038
Plant in service, net of depreciation	71,839	72,668
Other utility plant, net	1,315	0
Nuclear fuel, at amortized cost	885	875
Construction work in progress	7,598	7,254
Total property, plant, and equipment	81,637	80,797
Other Property and Investments:
Goodwill	5,284	5,315
Equity investments in unconsolidated subsidiaries	1,598	1,580
Other intangible assets, net of amortization	585	613
Nuclear decommissioning trusts, at fair value	1,875	1,721
Leveraged leases	806	798
Miscellaneous property and investments	363	269
Total other property and investments	10,511	10,296
Deferred Charges and Other Assets:
Operating lease right-of-use assets, net of amortization	1,881
Deferred charges related to income taxes	794	794
Unamortized loss on reacquired debt	318	323
Other regulatory assets, deferred	8,191	8,308
Assets held for sale, deferred	763	5,350
Other deferred charges and assets	1,292	1,463
Total deferred charges and other assets	13,239	16,238
Total Assets	114,096	116,914
Current Liabilities:
Securities due within one year	2,315	3,198
Notes payable	1,251	2,915
Energy marketing trade payables	532	856
Accounts payable —
Accounts payable	2,037	2,580
Customer deposits	483	522
Accrued taxes —
Accrued income taxes	340	21
Other accrued taxes	331	635
Accrued interest	412	472
Accrued compensation	473	1,030
Asset retirement obligations	417	404
Other regulatory liabilities	310	376
Liabilities held for sale	38	425
Operating lease obligations	226
Other current liabilities	754	852
Total current liabilities	9,919	14,286
Long-term Debt	40,457	40,736
Deferred Credits and Other Liabilities:
Accumulated deferred income taxes	7,937	6,558
Deferred credits related to income taxes	6,417	6,460
Accumulated deferred ITCs	2,353	2,372
Employee benefit obligations	2,084	2,147
Operating lease obligations, deferred	1,720
Asset retirement obligations, deferred	9,011	8,990
Accrued environmental remediation	261	268
Other cost of removal obligations	2,304	2,297
Other regulatory liabilities, deferred	211	169
Liabilities held for sale, deferred	39	2,836
Other deferred credits and liabilities	405	465
Total deferred credits and other liabilities	32,742	32,562
Total Liabilities	83,118	87,584
Redeemable Preferred Stock of Subsidiaries	291	291
Stockholders' Equity:
Total stockholders' equity	30,687	29,039
Total Liabilities and Stockholders' Equity	114,096	116,914
ALABAMA POWER CO
Current Assets:
Cash and cash equivalents	759	313
Receivables —
Customer accounts receivable	382	403
Unbilled revenues	126	150
Affiliated	45	94
Other accounts and notes receivable	58	51
Accumulated provision for uncollectible accounts	(10)	(10)
Materials and supplies	558	546
Fossil fuel for generation	120	141
Prepaid expenses	113	66
Other regulatory assets	125	137
Other current assets	21	18
Total current assets	2,297	1,909
Property, Plant, and Equipment:
In service	28,810	30,402
Less: Accumulated depreciation	9,447	9,988
Plant in service, net of depreciation	19,363	20,414
Other utility plant, net	1,315	0
Nuclear fuel, at amortized cost	320	324
Construction work in progress	1,023	1,113
Total property, plant, and equipment	22,021	21,851
Other Property and Investments:
Equity investments in unconsolidated subsidiaries	64	65
Nuclear decommissioning trusts, at fair value	933	847
Miscellaneous property and investments	129	127
Total other property and investments	1,126	1,039
Deferred Charges and Other Assets:
Operating lease right-of-use assets, net of amortization	160
Deferred charges related to income taxes	239	240
Deferred under recovered regulatory clause revenues	21	116
Other regulatory assets, deferred	1,350	1,386
Other deferred charges and assets	193	189
Total deferred charges and other assets	1,963	1,931
Total Assets	27,407	26,730
Current Liabilities:
Securities due within one year	1	201
Accounts payable —
Affiliated	262	364
Other	346	614
Customer deposits	97	96
Accrued taxes —
Other accrued taxes	97	44
Accrued interest	77	89
Accrued compensation	102	227
Asset retirement obligations	163	163
Operating lease obligations	47
Other current liabilities	97	161
Total current liabilities	1,242	1,959
Long-term Debt	7,924	7,923
Deferred Credits and Other Liabilities:
Accumulated deferred income taxes	2,971	2,962
Deferred credits related to income taxes	2,015	2,027
Accumulated deferred ITCs	105	106
Employee benefit obligations	302	314
Operating lease obligations, deferred	147
Asset retirement obligations, deferred	3,064	3,047
Other cost of removal obligations	489	497
Other regulatory liabilities, deferred	107	69
Other deferred credits and liabilities	30	58
Total deferred credits and other liabilities	9,230	9,080
Total Liabilities	18,396	18,962
Redeemable Preferred Stock	291	291
Stockholders' Equity:
Total stockholders' equity	8,720	7,477
Total Liabilities and Stockholders' Equity	27,407	26,730
GEORGIA POWER CO
Current Assets:
Cash and cash equivalents	9	4
Restricted cash and cash equivalents	0	108
Receivables —
Customer accounts receivable	550	591
Unbilled revenues	179	208
Under recovered fuel clause revenues	73	115
Joint owner accounts receivable	170	170
Affiliated	21	39
Other accounts and notes receivable	241	80
Accumulated provision for uncollectible accounts	(2)	(2)
Materials and supplies	504	519
Fossil fuel for generation	272	231
Prepaid expenses	193	142
Other regulatory assets	210	199
Other current assets	48	70
Total current assets	2,468	2,474
Property, Plant, and Equipment:
In service	38,015	37,675
Less: Accumulated depreciation	12,210	12,096
Plant in service, net of depreciation	25,805	25,579
Nuclear fuel, at amortized cost	565	550
Construction work in progress	5,298	4,833
Total property, plant, and equipment	31,668	30,962
Other Property and Investments:
Equity investments in unconsolidated subsidiaries	50	51
Nuclear decommissioning trusts, at fair value	942	873
Miscellaneous property and investments	73	72
Total other property and investments	1,065	996
Deferred Charges and Other Assets:
Operating lease right-of-use assets, net of amortization	1,519
Deferred charges related to income taxes	518	517
Other regulatory assets, deferred	4,921	4,902
Other deferred charges and assets	379	514
Total deferred charges and other assets	7,337	5,933
Total Assets	42,538	40,365
Current Liabilities:
Securities due within one year	973	617
Notes payable	275	294
Accounts payable —
Affiliated	448	575
Other	827	890
Customer deposits	278	276
Accrued taxes —
Other accrued taxes	132	377
Accrued interest	103	105
Accrued compensation	112	221
Asset retirement obligations	221	202
Other regulatory liabilities	197	169
Operating lease obligations	139
Other current liabilities	305	183
Total current liabilities	3,871	3,909
Long-term Debt	10,108	9,364
Deferred Credits and Other Liabilities:
Accumulated deferred income taxes	3,192	3,062
Deferred credits related to income taxes	3,079	3,080
Accumulated deferred ITCs	259	262
Employee benefit obligations	567	599
Operating lease obligations, deferred	1,404
Asset retirement obligations, deferred	5,634	5,627
Other deferred credits and liabilities	155	139
Total deferred credits and other liabilities	14,290	12,769
Total Liabilities	28,269	26,042
Stockholders' Equity:
Total stockholders' equity	14,269	14,323
Total Liabilities and Stockholders' Equity	42,538	40,365
MISSISSIPPI POWER CO
Current Assets:
Cash and cash equivalents	212	293
Receivables —
Customer accounts receivable	29	34
Unbilled revenues	37	41
Affiliated	16	21
Other accounts and notes receivable	36	31
Materials and supplies	52	53
Fossil fuel for generation	23	20
Other regulatory assets	102	116
Other current assets	6	19
Total current assets	513	628
Property, Plant, and Equipment:
In service	4,821	4,900
Less: Accumulated depreciation	1,467	1,429
Plant in service, net of depreciation	3,354	3,471
Construction work in progress	110	103
Total property, plant, and equipment	3,464	3,574
Other Property and Investments:
Total other property and investments	123	24
Deferred Charges and Other Assets:
Operating lease right-of-use assets, net of amortization	8
Deferred charges related to income taxes	33	33
Other regulatory assets, deferred	487	474
Accumulated deferred income taxes	148	150
Other deferred charges and assets	17	3
Total deferred charges and other assets	685	660
Total Assets	4,785	4,886
Current Liabilities:
Securities due within one year	339	40
Accounts payable —
Affiliated	52	60
Other	50	90
Accrued taxes —
Other accrued taxes	33	95
Accrued interest	20	15
Accrued compensation	16	38
Accrued plant closure costs	26	29
Asset retirement obligations	28	34
Operating lease obligations	3
Other current liabilities	55	40
Over recovered regulatory clause liabilities	14	14
Total current liabilities	633	455
Long-term Debt	1,280	1,539
Deferred Credits and Other Liabilities:
Accumulated deferred income taxes	373	378
Deferred credits related to income taxes	367	382
Employee benefit obligations	111	115
Operating lease obligations, deferred	5
Asset retirement obligations, deferred	127	126
Other cost of removal obligations	186	185
Other regulatory liabilities, deferred	80	81
Other deferred credits and liabilities	18	16
Total deferred credits and other liabilities	1,262	1,283
Total Liabilities	3,175	3,277
Stockholders' Equity:
Total stockholders' equity	1,610	1,609
Total Liabilities and Stockholders' Equity	4,785	4,886
SOUTHERN POWER CO
Current Assets:
Cash and cash equivalents	133	181
Receivables —
Customer accounts receivable	120	111
Affiliated	33	55
Other accounts and notes receivable	116	116
Materials and supplies	218	220
Prepaid income taxes	1,190	25
Other current assets	37	37
Total current assets	1,847	745
Property, Plant, and Equipment:
In service	13,284	13,271
Less: Accumulated depreciation	2,288	2,171
Plant in service, net of depreciation	10,996	11,100
Construction work in progress	409	430
Total property, plant, and equipment	11,405	11,530
Other Property and Investments:
Intangible assets, net of amortization	340	345
Miscellaneous property and investments	2	0
Total other property and investments	342	345
Deferred Charges and Other Assets:
Operating lease right-of-use assets, net of amortization	372
Prepaid LTSAs	102	98
Accumulated deferred income taxes	17	1,186
Income taxes receivable, non-current	33	30
Assets held for sale, deferred	644	576
Other deferred charges and assets	342	373
Total deferred charges and other assets	1,510	2,263
Total Assets	15,104	14,883
Current Liabilities:
Securities due within one year	599	599
Notes payable	105	100
Accounts payable —
Affiliated	69	92
Other	66	77
Accrued taxes —
Accrued income taxes	11	6
Accrued interest	44	36
Liabilities held for sale	9	15
Operating lease obligations	22
Other current liabilities	111	106
Total current liabilities	1,014	1,031
Long-term Debt	4,396	4,418
Deferred Credits and Other Liabilities:
Accumulated deferred income taxes	107	105
Accumulated deferred ITCs	1,817	1,832
Operating lease obligations, deferred	371
Other deferred credits and liabilities	181	213
Total deferred credits and other liabilities	2,476	2,150
Total Liabilities	7,886	7,599
Stockholders' Equity:
Total stockholders' equity	7,218	7,284
Total Liabilities and Stockholders' Equity	15,104	14,883
SOUTHERN Co GAS
Current Assets:
Cash and cash equivalents	57	64
Receivables —
Customer accounts receivable	472	370
Energy marketing receivables	529	801
Unbilled revenues	179	213
Affiliated	9	11
Other accounts and notes receivable	108	142
Accumulated provision for uncollectible accounts	(27)	(30)
Natural gas for sale	189	524
Prepaid expenses	99	118
Assets from risk management activities, net of collateral	108	219
Other regulatory assets	46	73
Other current assets	42	50
Total current assets	1,811	2,555
Property, Plant, and Equipment:
In service	15,417	15,177
Less: Accumulated depreciation	4,466	4,400
Plant in service, net of depreciation	10,951	10,777
Construction work in progress	577	580
Total property, plant, and equipment	11,528	11,357
Other Property and Investments:
Goodwill	5,015	5,015
Equity investments in unconsolidated subsidiaries	1,557	1,538
Other intangible assets, net of amortization	93	101
Miscellaneous property and investments	20	20
Total other property and investments	6,685	6,674
Deferred Charges and Other Assets:
Operating lease right-of-use assets, net of amortization	86
Other regulatory assets, deferred	657	669
Other deferred charges and assets	185	193
Total deferred charges and other assets	928	862
Total Assets	20,952	21,448
Current Liabilities:
Securities due within one year	354	357
Notes payable	361	650
Energy marketing trade payables	532	856
Accounts payable —
Affiliated	31	45
Other	391	402
Customer deposits	91	133
Accrued taxes —
Accrued income taxes	89	66
Other accrued taxes	72	75
Accrued interest	64	55
Accrued compensation	49	100
Liabilities from risk management activities, net of collateral	26	76
Other regulatory liabilities	86	79
Operating lease obligations	13
Other current liabilities	160	130
Total current liabilities	2,306	3,024
Long-term Debt	5,574	5,583
Deferred Credits and Other Liabilities:
Accumulated deferred income taxes	1,064	1,016
Deferred credits related to income taxes	926	940
Employee benefit obligations	351	357
Operating lease obligations, deferred	71
Accrued environmental remediation	261	268
Other cost of removal obligations	1,598	1,585
Other deferred credits and liabilities	63	105
Total deferred credits and other liabilities	4,334	4,271
Total Liabilities	12,214	12,878
Stockholders' Equity:
Total stockholders' equity	8,738	8,570
Total Liabilities and Stockholders' Equity	$ 20,952	$ 21,448