Condensed Consolidated Balance Sheets (Unaudited) - USD ($) $ in Millions	Jun. 30, 2016	Dec. 31, 2015
Current Assets:
Cash and cash equivalents	$ 1,897	$ 1,404
Restricted cash and cash equivalents	7,963	0
Receivables —
Customer accounts receivable	1,281	1,058
Unbilled revenues	590	397
Under recovered regulatory clause revenues	12	63
Income taxes receivable, current	0	144
Other accounts and notes receivable	247	398
Accumulated provision for uncollectible accounts	(14)	(13)
Fossil fuel stock, at average cost	798	868
Materials and supplies, at average cost	1,210	1,061
Vacation pay	181	178
Other regulatory assets, current	350	402
Prepaid expenses	563	495
Other current assets	71	71
Total current assets	15,149	6,526
Property, Plant, and Equipment:
In service	78,112	75,118
Less accumulated provision for depreciation	24,778	24,253
Plant in service, net of depreciation	53,334	50,865
Other utility plant, net	174	233
Nuclear fuel, at amortized cost	934	934
Construction work in progress	9,451	9,082
Total property, plant, and equipment	63,893	61,114
Other Property and Investments:
Goodwill	264	2
Other intangible assets, net of amortization	490	317
Nuclear decommissioning trusts, at fair value	1,578	1,512
Leveraged leases	763	755
Miscellaneous property and investments	230	166
Total other property and investments	3,325	2,752
Deferred Charges and Other Assets:
Deferred charges related to income taxes	1,580	1,560
Unamortized loss on reacquired debt	220	227
Other regulatory assets, deferred	5,460	4,989
Income taxes receivable, non-current	413	413
Other deferred charges and assets	833	737
Total deferred charges and other assets	8,506	7,926
Total Assets	90,873	78,318
Current Liabilities:
Securities due within one year	2,724	2,674
Notes payable	1,372	1,376
Accounts payable —
Accounts payable	1,493	1,905
Customer deposits	408	404
Accrued taxes —
Accrued income taxes	13	19
Other accrued taxes	398	484
Accrued interest	289	249
Accrued vacation pay	229	228
Accrued compensation	335	549
Asset retirement obligations, current	349	217
Liabilities from risk management activities	95	156
Other regulatory liabilities, current	115	278
Other current liabilities	694	590
Total current liabilities	8,514	9,129
Long-term Debt:
Total Long-term Debt	35,368	24,688
Deferred Credits and Other Liabilities:
Accumulated deferred income taxes	12,563	12,322
Deferred credits related to income taxes	183	187
Accumulated deferred investment tax credits	1,427	1,219
Employee benefit obligations	2,485	2,582
Asset retirement obligations, deferred	4,129	3,542
Unrecognized tax benefits	380	370
Other cost of removal obligations	1,154	1,162
Other regulatory liabilities, deferred	335	254
Other deferred credits and liabilities	724	720
Total deferred credits and other liabilities	23,380	22,358
Total Liabilities	67,262	56,175
Redeemable Preferred Stock of Subsidiaries	118	118
Redeemable Noncontrolling Interest	47	43
Common Stockholders' Equity:
Common stock	4,708	4,572
Paid-in capital	7,499	6,282
Treasury, at cost	(30)	(142)
Retained earnings (accumulated deficit)	10,085	10,010
Accumulated other comprehensive income (loss)	(247)	(130)
Total common stockholders' equity	22,015	20,592
Preferred and Preference Stock of Subsidiaries	609	609
Noncontrolling Interests	822	781
Total Stockholders' Equity	23,446	21,982
Total Liabilities and Stockholders' Equity	90,873	78,318
Alabama Power [Member]
Current Assets:
Cash and cash equivalents	343	194
Receivables —
Customer accounts receivable	357	332
Unbilled revenues	174	119
Under recovered regulatory clause revenues	7	43
Income taxes receivable, current	0	142
Other accounts and notes receivable	35	20
Affiliated companies	32	50
Accumulated provision for uncollectible accounts	(9)	(10)
Fossil fuel stock, at average cost	271	239
Materials and supplies, at average cost	412	398
Vacation pay	66	66
Other regulatory assets, current	87	115
Prepaid expenses	100	83
Other current assets	10	10
Total current assets	1,885	1,801
Property, Plant, and Equipment:
In service	25,572	24,750
Less accumulated provision for depreciation	8,889	8,736
Plant in service, net of depreciation	16,683	16,014
Nuclear fuel, at amortized cost	368	363
Construction work in progress	423	801
Total property, plant, and equipment	17,474	17,178
Other Property and Investments:
Equity investments in unconsolidated subsidiaries	69	71
Nuclear decommissioning trusts, at fair value	759	737
Miscellaneous property and investments	101	96
Total other property and investments	929	904
Deferred Charges and Other Assets:
Deferred charges related to income taxes	519	522
Deferred under recovered regulatory clause revenues	136	99
Other regulatory assets, deferred	1,100	1,114
Other deferred charges and assets	113	103
Total deferred charges and other assets	1,868	1,838
Total Assets	22,156	21,721
Current Liabilities:
Securities due within one year	200	200
Accounts payable —
Affiliated accounts payable	293	278
Other accounts payable	294	410
Customer deposits	88	88
Accrued taxes —
Accrued income taxes	10	0
Other accrued taxes	93	38
Accrued interest	80	73
Accrued vacation pay	55	55
Accrued compensation	72	119
Liabilities from risk management activities	17	55
Other regulatory liabilities, current	81	240
Other current liabilities	41	39
Total current liabilities	1,324	1,595
Long-term Debt:
Total Long-term Debt	6,894	6,654
Deferred Credits and Other Liabilities:
Accumulated deferred income taxes	4,413	4,241
Deferred credits related to income taxes	68	70
Accumulated deferred investment tax credits	114	118
Employee benefit obligations	360	388
Asset retirement obligations, deferred	1,502	1,448
Other cost of removal obligations	699	722
Other regulatory liabilities, deferred	106	136
Deferred over recovered regulatory clause revenues	102	0
Other deferred credits and liabilities	69	76
Total deferred credits and other liabilities	7,433	7,199
Total Liabilities	15,651	15,448
Redeemable Preferred Stock	85	85
Preference Stock	196	196
Common Stockholders' Equity:
Common stock	1,222	1,222
Paid-in capital	2,589	2,341
Retained earnings (accumulated deficit)	2,445	2,461
Accumulated other comprehensive income (loss)	(32)	(32)
Total common stockholders' equity	6,224	5,992
Total Liabilities and Stockholders' Equity	22,156	21,721
Georgia Power [Member]
Current Assets:
Cash and cash equivalents	121	67
Receivables —
Customer accounts receivable	592	541
Unbilled revenues	293	188
Joint owner accounts receivable	51	227
Income taxes receivable, current	0	114
Other accounts and notes receivable	52	57
Affiliated companies	16	18
Accumulated provision for uncollectible accounts	(2)	(2)
Fossil fuel stock, at average cost	340	402
Materials and supplies, at average cost	477	449
Vacation pay	93	91
Other regulatory assets, current	123	123
Prepaid income taxes	157	156
Other current assets	55	92
Total current assets	2,368	2,523
Property, Plant, and Equipment:
In service	33,045	31,841
Less accumulated provision for depreciation	11,087	10,903
Plant in service, net of depreciation	21,958	20,938
Other utility plant, net	174	171
Nuclear fuel, at amortized cost	566	572
Construction work in progress	4,655	4,775
Total property, plant, and equipment	27,353	26,456
Other Property and Investments:
Equity investments in unconsolidated subsidiaries	62	64
Nuclear decommissioning trusts, at fair value	819	775
Miscellaneous property and investments	42	43
Total other property and investments	923	882
Deferred Charges and Other Assets:
Deferred charges related to income taxes	677	679
Other regulatory assets, deferred	2,524	2,152
Other deferred charges and assets	170	173
Total deferred charges and other assets	3,371	3,004
Total Assets	34,015	32,865
Current Liabilities:
Securities due within one year	658	712
Notes payable	197	158
Accounts payable —
Affiliated accounts payable	407	411
Other accounts payable	541	750
Customer deposits	268	264
Accrued taxes —
Accrued income taxes	0	12
Other accrued taxes	199	325
Accrued interest	107	99
Accrued vacation pay	64	62
Accrued compensation	88	142
Asset retirement obligations, current	323	179
Other current liabilities	299	181
Total current liabilities	3,151	3,295
Long-term Debt:
Total Long-term Debt	10,120	9,616
Deferred Credits and Other Liabilities:
Accumulated deferred income taxes	5,788	5,627
Deferred credits related to income taxes	104	105
Accumulated deferred investment tax credits	199	204
Employee benefit obligations	901	949
Asset retirement obligations, deferred	2,249	1,737
Other deferred credits and liabilities	302	347
Total deferred credits and other liabilities	9,543	8,969
Total Liabilities	22,814	21,880
Redeemable Preferred Stock	45	45
Preference Stock	221	221
Common Stockholders' Equity:
Common stock	398	398
Paid-in capital	6,527	6,275
Retained earnings (accumulated deficit)	4,024	4,061
Accumulated other comprehensive income (loss)	(14)	(15)
Total common stockholders' equity	10,935	10,719
Total Liabilities and Stockholders' Equity	34,015	32,865
Gulf Power [Member]
Current Assets:
Cash and cash equivalents	46	74
Receivables —
Customer accounts receivable	81	76
Unbilled revenues	77	54
Under recovered regulatory clause revenues	5	20
Income taxes receivable, current	0	27
Other accounts and notes receivable	3	9
Affiliated companies	10	1
Accumulated provision for uncollectible accounts	(1)	(1)
Fossil fuel stock, at average cost	74	108
Materials and supplies, at average cost	56	56
Other regulatory assets, current	65	90
Other current assets	17	22
Total current assets	433	536
Property, Plant, and Equipment:
In service	5,032	5,045
Less accumulated provision for depreciation	1,351	1,296
Plant in service, net of depreciation	3,681	3,749
Other utility plant, net	0	62
Construction work in progress	68	48
Total property, plant, and equipment	3,749	3,859
Other Property and Investments:
Total other property and investments	4	4
Deferred Charges and Other Assets:
Deferred charges related to income taxes	60	61
Other regulatory assets, deferred	523	427
Other deferred charges and assets	49	33
Total deferred charges and other assets	632	521
Total Assets	4,818	4,920
Current Liabilities:
Securities due within one year	195	110
Notes payable	187	142
Accounts payable —
Affiliated accounts payable	46	55
Other accounts payable	44	44
Customer deposits	36	36
Accrued taxes —
Accrued income taxes	5	4
Other accrued taxes	25	9
Accrued interest	8	9
Accrued compensation	13	25
Deferred capacity expense, current	22	22
Liabilities from risk management activities	32	49
Other regulatory liabilities, current	19	22
Other current liabilities	30	40
Total current liabilities	662	567
Long-term Debt:
Total Long-term Debt	987	1,193
Deferred Credits and Other Liabilities:
Accumulated deferred income taxes	905	893
Employee benefit obligations	126	129
Deferred capacity expense	130	141
Asset retirement obligations, deferred	128	113
Other cost of removal obligations	237	233
Other regulatory liabilities, deferred	46	47
Other deferred credits and liabilities	90	102
Total deferred credits and other liabilities	1,662	1,658
Total Liabilities	3,311	3,418
Preference Stock	147	147
Common Stockholders' Equity:
Common stock	503	503
Paid-in capital	573	567
Retained earnings (accumulated deficit)	288	285
Accumulated other comprehensive income (loss)	(4)	0
Total common stockholders' equity	1,360	1,355
Total Liabilities and Stockholders' Equity	4,818	4,920
Mississippi Power [Member]
Current Assets:
Cash and cash equivalents	137	98
Receivables —
Customer accounts receivable	35	26
Unbilled revenues	46	36
Income taxes receivable, current	0	20
Other accounts and notes receivable	5	10
Affiliated companies	12	20
Fossil fuel stock, at average cost	99	104
Materials and supplies, at average cost	77	75
Other regulatory assets, current	97	95
Prepaid income taxes	5	39
Other current assets	7	8
Total current assets	520	531
Property, Plant, and Equipment:
In service	4,809	4,886
Less accumulated provision for depreciation	1,248	1,262
Plant in service, net of depreciation	3,561	3,624
Construction work in progress	2,429	2,254
Total property, plant, and equipment	5,990	5,878
Other Property and Investments:
Total other property and investments	11	11
Deferred Charges and Other Assets:
Deferred charges related to income taxes	317	290
Other regulatory assets, deferred	520	525
Income taxes receivable, non-current	544	544
Other deferred charges and assets	85	61
Total deferred charges and other assets	1,466	1,420
Total Assets	7,987	7,840
Current Liabilities:
Securities due within one year	343	728
Notes payable	25	500
Accounts payable —
Affiliated accounts payable	87	85
Other accounts payable	120	135
Customer deposits	16	16
Accrued taxes —
Accrued income taxes	57	0
Other accrued taxes	48	85
Accrued interest	19	18
Accrued compensation	14	26
Asset retirement obligations, current	21	22
Over recovered regulatory clause liabilities	100	96
Customer liability associated with Kemper refunds	5	73
Other current liabilities	41	52
Total current liabilities	896	1,836
Long-term Debt:
Long-term Debt, Affiliated	551	576
Long-term debt, non-affiliated	2,164	1,310
Total Long-term Debt	2,715	1,886
Deferred Credits and Other Liabilities:
Accumulated deferred income taxes	773	762
Deferred credits related to income taxes	8	8
Accumulated deferred investment tax credits	5	5
Employee benefit obligations	148	153
Asset retirement obligations, deferred	157	154
Unrecognized tax benefits	368	368
Other cost of removal obligations	169	165
Other regulatory liabilities, deferred	74	71
Other deferred credits and liabilities	40	40
Total deferred credits and other liabilities	1,742	1,726
Total Liabilities	5,353	5,448
Redeemable Preferred Stock	33	33
Common Stockholders' Equity:
Common stock	38	38
Paid-in capital	3,122	2,893
Retained earnings (accumulated deficit)	(553)	(566)
Accumulated other comprehensive income (loss)	(6)	(6)
Total common stockholders' equity	2,601	2,359
Total Liabilities and Stockholders' Equity	7,987	7,840
Southern Power [Member]
Current Assets:
Cash and cash equivalents	1,022	830
Receivables —
Customer accounts receivable	115	75
Other accounts and notes receivable	23	19
Affiliated companies	60	30
Fossil fuel stock, at average cost	14	16
Materials and supplies, at average cost	120	63
Prepaid income taxes	192	45
Other current assets	31	30
Total current assets	1,577	1,108
Property, Plant, and Equipment:
In service	8,348	7,275
Less accumulated provision for depreciation	1,374	1,248
Plant in service, net of depreciation	6,974	6,027
Construction work in progress	1,852	1,137
Total property, plant, and equipment	8,826	7,164
Other Property and Investments:
Goodwill	2	2
Other intangible assets, net of amortization	316	317
Total other property and investments	318	319
Deferred Charges and Other Assets:
Prepaid long-term service agreements	165	166
Other deferred charges and assets -- affiliated	23	9
Other deferred charges and assets	173	139
Total deferred charges and other assets	361	314
Total Assets	11,082	8,905
Current Liabilities:
Securities due within one year	403	403
Notes payable	831	137
Accounts payable —
Affiliated accounts payable	80	66
Other accounts payable	175	327
Accrued taxes —
Accrued income taxes	9	198
Other accrued taxes	16	5
Accrued interest	22	23
Contingent consideration	23	36
Other current liabilities	69	44
Total current liabilities	1,628	1,239
Long-term Debt:
Total Long-term Debt	3,929	2,719
Deferred Credits and Other Liabilities:
Accumulated deferred income taxes	524	601
Accumulated deferred investment tax credits	1,107	889
Accrued income taxes, non-current	109	109
Asset retirement obligations, deferred	28	21
Deferred capacity revenues -- affiliated	7	17
Other deferred credits and liabilities	105	3
Total deferred credits and other liabilities	1,880	1,640
Total Liabilities	7,437	5,598
Redeemable Noncontrolling Interest	47	43
Common Stockholders' Equity:
Common stock	0	0
Paid-in capital	2,121	1,822
Retained earnings (accumulated deficit)	661	657
Accumulated other comprehensive income (loss)	(6)	4
Total common stockholders' equity	2,776	2,483
Noncontrolling Interests, Total	822	781
Total Stockholders' Equity	3,598	3,264
Total Liabilities and Stockholders' Equity	$ 11,082	$ 8,905