Condensed Consolidated Balance Sheets (Unaudited) - USD ($) $ in Millions	Sep. 30, 2020	Dec. 31, 2019
Current Assets:
Cash and cash equivalents	$ 3,379	$ 1,975
Receivables —
Customer accounts receivable	1,778	1,614
Energy marketing receivables	328	428
Unbilled revenues	503	599
Other accounts and notes receivable	506	817
Accumulated provision for uncollectible accounts	(99)	(49)
Materials and supplies	1,522	1,388
Fossil fuel for generation	506	521
Natural gas for sale	448	479
Prepaid expenses	299	314
Assets from risk management activities, net of collateral	135	183
Regulatory assets – asset retirement obligations	246	287
Other regulatory assets	813	885
Assets held for sale	0	188
Other current assets	210	188
Total current assets	10,574	9,817
Property, Plant, and Equipment:
In service	108,831	105,114
Less: Accumulated depreciation	32,099	30,765
Plant in service, net of depreciation	76,732	74,349
Nuclear fuel, at amortized cost	804	851
Construction work in progress	8,861	7,880
Total property, plant, and equipment	86,397	83,080
Other Property and Investments:
Goodwill	5,280	5,280
Equity investments in unconsolidated subsidiaries	1,358	1,303
Other intangible assets, net of amortization	499	536
Nuclear decommissioning trusts, at fair value	2,109	2,036
Leveraged leases	653	788
Miscellaneous property and investments	403	391
Total other property and investments	10,302	10,334
Deferred Charges and Other Assets:
Operating lease right-of-use assets, net of amortization	1,791	1,800
Deferred charges related to income taxes	799	798
Unamortized loss on reacquired debt	285	300
Regulatory assets – asset retirement obligations, deferred	4,984	4,094
Other regulatory assets, deferred	6,502	6,805
Assets held for sale, deferred	0	601
Other deferred charges and assets	1,524	1,071
Total deferred charges and other assets	15,885	15,469
Total Assets	123,158	118,700
Current Liabilities:
Securities due within one year	4,378	2,989
Notes payable	171	2,055
Energy marketing trade payables	361	442
Accounts payable —
Accounts payable	1,924	2,115
Customer deposits	496	496
Accrued taxes —
Accrued income taxes	75	0
Other accrued taxes	742	659
Accrued interest	421	474
Accrued compensation	843	992
Asset retirement obligations	640	504
Other regulatory liabilities	616	756
Liabilities held for sale	0	5
Operating lease obligations	235	229
Other current liabilities	848	830
Total current liabilities	11,750	12,546
Long-term Debt	45,581	41,798
Deferred Credits and Other Liabilities:
Accumulated deferred income taxes	8,342	7,888
Deferred credits related to income taxes	5,763	6,078
Accumulated deferred ITCs	2,251	2,291
Employee benefit obligations	1,753	1,814
Operating lease obligations, deferred	1,570	1,615
Asset retirement obligations, deferred	10,020	9,282
Accrued environmental remediation	220	234
Other cost of removal obligations	2,231	2,239
Other regulatory liabilities, deferred	315	256
Other deferred credits and liabilities	571	609
Total deferred credits and other liabilities	33,036	32,306
Total Liabilities	90,367	86,650
Redeemable Preferred Stock of Subsidiaries	291	291
Common Stockholder's Equity (See accompanying statements)	32,500	31,759
Total Liabilities and Stockholders' Equity	123,158	118,700
ALABAMA POWER CO
Current Assets:
Cash and cash equivalents	1,037	894
Receivables —
Customer accounts receivable	499	425
Unbilled revenues	138	134
Affiliated	37	37
Other accounts and notes receivable	84	72
Accumulated provision for uncollectible accounts	(32)	(22)
Materials and supplies	562	512
Fossil fuel for generation	208	212
Prepaid expenses	71	50
Other regulatory assets	207	242
Other current assets	42	30
Total current assets	2,853	2,586
Property, Plant, and Equipment:
In service	31,355	30,023
Less: Accumulated depreciation	9,920	9,540
Plant in service, net of depreciation	21,435	20,483
Nuclear fuel, at amortized cost	257	296
Construction work in progress	926	890
Total property, plant, and equipment	22,618	21,669
Other Property and Investments:
Equity investments in unconsolidated subsidiaries	63	66
Nuclear decommissioning trusts, at fair value	1,039	1,023
Miscellaneous property and investments	130	128
Total other property and investments	1,232	1,217
Deferred Charges and Other Assets:
Operating lease right-of-use assets, net of amortization	162	132
Deferred charges related to income taxes	242	244
Deferred under recovered regulatory clause revenues	62	40
Regulatory assets – asset retirement obligations, deferred	1,475	1,019
Other regulatory assets, deferred	1,923	1,976
Other deferred charges and assets	402	269
Total deferred charges and other assets	4,266	3,680
Total Assets	30,969	29,152
Current Liabilities:
Securities due within one year	496	251
Accounts payable —
Affiliated	272	316
Other	353	514
Customer deposits	104	100
Accrued taxes —
Accrued taxes	210	78
Accrued interest	83	92
Accrued compensation	172	216
Asset retirement obligations	251	195
Other regulatory liabilities	144	193
Other current liabilities	116	105
Total current liabilities	2,201	2,060
Long-term Debt	8,622	8,270
Deferred Credits and Other Liabilities:
Accumulated deferred income taxes	3,372	3,260
Deferred credits related to income taxes	1,917	1,960
Accumulated deferred ITCs	96	100
Employee benefit obligations	191	206
Operating lease obligations, deferred	121	107
Asset retirement obligations, deferred	3,707	3,345
Other cost of removal obligations	360	412
Other regulatory liabilities, deferred	137	146
Other deferred credits and liabilities	39	40
Total deferred credits and other liabilities	9,940	9,576
Total Liabilities	20,763	19,906
Redeemable Preferred Stock	291	291
Common Stockholder's Equity (See accompanying statements)	9,915	8,955
Total Liabilities and Stockholders' Equity	30,969	29,152
GEORGIA POWER CO
Current Assets:
Cash and cash equivalents	518	52
Receivables —
Customer accounts receivable	715	533
Unbilled revenues	237	203
Joint owner accounts receivable	120	136
Affiliated	17	21
Other accounts and notes receivable	39	209
Accumulated provision for uncollectible accounts	(29)	(2)
Materials and supplies	572	501
Fossil fuel for generation	269	272
Regulatory assets – storm damage reserves	213	213
Regulatory assets – asset retirement obligations	209	254
Other regulatory assets	251	263
Other current assets	162	140
Total current assets	3,293	2,795
Property, Plant, and Equipment:
In service	39,170	38,137
Less: Accumulated depreciation	12,139	11,753
Plant in service, net of depreciation	27,031	26,384
Nuclear fuel, at amortized cost	547	555
Construction work in progress	6,752	5,650
Total property, plant, and equipment	34,330	32,589
Other Property and Investments:
Equity investments in unconsolidated subsidiaries	50	52
Nuclear decommissioning trusts, at fair value	1,070	1,013
Miscellaneous property and investments	67	64
Total other property and investments	1,187	1,129
Deferred Charges and Other Assets:
Operating lease right-of-use assets, net of amortization	1,345	1,428
Deferred charges related to income taxes	522	519
Regulatory assets – asset retirement obligations, deferred	3,307	2,865
Other regulatory assets, deferred	2,521	2,716
Other deferred charges and assets	541	500
Total deferred charges and other assets	8,236	8,028
Total Assets	47,046	44,541
Current Liabilities:
Securities due within one year	531	1,025
Notes payable	0	365
Accounts payable —
Affiliated	561	512
Other	731	711
Customer deposits	280	283
Accrued taxes —
Accrued taxes	415	407
Accrued interest	100	118
Accrued compensation	198	233
Asset retirement obligations	351	265
Other regulatory liabilities	302	447
Operating lease obligations	151	144
Over recovered fuel clause revenues	84	0
Other current liabilities	201	187
Total current liabilities	3,905	4,697
Long-term Debt	12,314	10,791
Deferred Credits and Other Liabilities:
Accumulated deferred income taxes	3,296	3,257
Deferred credits related to income taxes	2,664	2,862
Accumulated deferred ITCs	272	255
Employee benefit obligations	486	540
Operating lease obligations, deferred	1,163	1,282
Asset retirement obligations, deferred	5,901	5,519
Other deferred credits and liabilities	339	273
Total deferred credits and other liabilities	14,121	13,988
Total Liabilities	30,340	29,476
Common Stockholder's Equity (See accompanying statements)	16,706	15,065
Total Liabilities and Stockholders' Equity	47,046	44,541
MISSISSIPPI POWER CO
Current Assets:
Cash and cash equivalents	58	286
Receivables —
Customer accounts receivable	46	35
Unbilled revenues	40	39
Affiliated	14	27
Other accounts and notes receivable	34	26
Materials and supplies	63	61
Fossil fuel for generation	19	26
Other regulatory assets	60	99
Other current assets	19	10
Total current assets	353	609
Property, Plant, and Equipment:
In service	4,966	4,857
Less: Accumulated depreciation	1,553	1,463
Plant in service, net of depreciation	3,413	3,394
Construction work in progress	140	126
Total property, plant, and equipment	3,553	3,520
Other Property and Investments:
Total other property and investments	149	131
Deferred Charges and Other Assets:
Deferred charges related to income taxes	32	32
Regulatory assets – asset retirement obligations, deferred	202	210
Other regulatory assets, deferred	357	360
Accumulated deferred income taxes	130	139
Other deferred charges and assets	72	34
Total deferred charges and other assets	793	775
Total Assets	4,848	5,035
Current Liabilities:
Securities due within one year	0	281
Accounts payable —
Affiliated	54	76
Other	50	75
Accrued taxes —
Accrued taxes	120	105
Accrued interest	14	15
Accrued compensation	28	35
Asset retirement obligations	23	33
Other regulatory liabilities	56	21
Over recovered fuel clause revenues	31	29
Other current liabilities	42	64
Total current liabilities	418	734
Long-term Debt	1,402	1,308
Deferred Credits and Other Liabilities:
Accumulated deferred income taxes	422	424
Deferred credits related to income taxes	299	352
Employee benefit obligations	95	99
Asset retirement obligations, deferred	158	157
Other cost of removal obligations	195	189
Other regulatory liabilities, deferred	64	76
Other deferred credits and liabilities	35	44
Total deferred credits and other liabilities	1,268	1,341
Total Liabilities	3,088	3,383
Common Stockholder's Equity (See accompanying statements)	1,760	1,652
Total Liabilities and Stockholders' Equity	4,848	5,035
SOUTHERN POWER CO
Current Assets:
Cash and cash equivalents	416	279
Receivables —
Customer accounts receivable	135	107
Affiliated	41	30
Other accounts and notes receivable	37	73
Materials and supplies	204	191
Prepaid income taxes	33	36
Other current assets	37	43
Total current assets	903	759
Property, Plant, and Equipment:
In service	13,600	13,270
Less: Accumulated depreciation	2,776	2,464
Plant in service, net of depreciation	10,824	10,806
Construction work in progress	335	515
Total property, plant, and equipment	11,159	11,321
Other Property and Investments:
Intangible assets, net of amortization	307	322
Equity investments in unconsolidated subsidiaries	19	28
Miscellaneous property and investments	19	28
Total other property and investments	326	350
Deferred Charges and Other Assets:
Operating lease right-of-use assets, net of amortization	395	369
Prepaid LTSAs	160	128
Assets held for sale, deferred	0	601
Accumulated deferred income taxes	231	551
Income taxes receivable, non-current	13	5
Other deferred charges and assets	237	216
Total deferred charges and other assets	1,036	1,870
Total Assets	13,424	14,300
Current Liabilities:
Securities due within one year	525	824
Notes payable	0	549
Accounts payable —
Affiliated	49	56
Other	69	85
Accrued taxes —
Accrued income taxes	9	0
Other accrued taxes	31	26
Accrued interest	26	32
Other current liabilities	104	132
Total current liabilities	813	1,704
Long-term Debt	3,630	3,574
Deferred Credits and Other Liabilities:
Accumulated deferred income taxes	117	115
Accumulated deferred ITCs	1,687	1,731
Operating lease obligations, deferred	404	376
Other deferred credits and liabilities	162	178
Total deferred credits and other liabilities	2,370	2,400
Total Liabilities	6,813	7,678
Common Stockholder's Equity (See accompanying statements)	6,611	6,622
Total Liabilities and Stockholders' Equity	13,424	14,300
SOUTHERN Co GAS
Current Assets:
Cash and cash equivalents	157	46
Receivables —
Customer accounts receivable	214	323
Energy marketing receivables	328	428
Unbilled revenues	60	183
Affiliated	3	5
Other accounts and notes receivable	42	114
Accumulated provision for uncollectible accounts	(34)	(18)
Natural gas for sale	448	479
Prepaid expenses	92	65
Assets from risk management activities, net of collateral	75	177
Other regulatory assets	110	92
Assets held for sale	0	171
Other current assets	43	41
Total current assets	1,538	2,106
Property, Plant, and Equipment:
In service	17,202	16,344
Less: Accumulated depreciation	4,761	4,650
Plant in service, net of depreciation	12,441	11,694
Construction work in progress	655	613
Total property, plant, and equipment	13,096	12,307
Other Property and Investments:
Goodwill	5,015	5,015
Equity investments in unconsolidated subsidiaries	1,301	1,251
Other intangible assets, net of amortization	55	70
Miscellaneous property and investments	20	20
Total other property and investments	6,391	6,356
Deferred Charges and Other Assets:
Operating lease right-of-use assets, net of amortization	85	93
Other regulatory assets, deferred	580	618
Other deferred charges and assets	242	207
Total deferred charges and other assets	907	918
Total Assets	21,932	21,687
Current Liabilities:
Securities due within one year	334	0
Notes payable	150	650
Energy marketing trade payables	361	442
Accounts payable —
Affiliated	46	41
Other	341	315
Customer deposits	94	96
Accrued taxes —
Accrued taxes	78	71
Accrued interest	66	52
Accrued compensation	83	100
Liabilities from risk management activities, net of collateral	31	21
Other regulatory liabilities	112	94
Other current liabilities	128	128
Total current liabilities	1,824	2,010
Long-term Debt	6,127	5,845
Deferred Credits and Other Liabilities:
Accumulated deferred income taxes	1,213	1,219
Deferred credits related to income taxes	854	874
Employee benefit obligations	247	265
Operating lease obligations, deferred	70	78
Accrued environmental remediation	220	233
Other cost of removal obligations	1,642	1,606
Other deferred credits and liabilities	50	51
Total deferred credits and other liabilities	4,296	4,326
Total Liabilities	12,247	12,181
Common Stockholder's Equity (See accompanying statements)	9,685	9,506
Total Liabilities and Stockholders' Equity	$ 21,932	$ 21,687