Condensed Consolidated Statements of Cash Flows (Unaudited) - USD ($) $ in Millions	6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019
Operating Activities:
Net income	$ 1,461	$ 2,989
Adjustments to reconcile net income to net cash provided from operating activities —
Depreciation and amortization, total	1,916	1,623
Deferred income taxes	(218)	274
Utilization of federal investment tax credits	0	427
Allowance for equity funds used during construction	(68)	(63)
Pension, postretirement, and other employee benefits	(119)	(65)
Settlement of asset retirement obligations	(193)	(143)
Stock based compensation expense	84	75
Estimated loss on Plant Vogtle Units 3 and 4	149	0
Storm damage reserve accruals	117	23
Impairment charges	154	32
(Gain) loss on dispositions, net	(35)	(2,512)
Other, net	43	(3)
Changes in certain current assets and liabilities —
-Receivables	292	653
-Prepayments	(102)	(53)
-Natural gas for sale	182	255
-Other current assets	(253)	(18)
-Accounts payable	(467)	(1,045)
-Accrued taxes	258	511
-Accrued compensation	(347)	(312)
-Retail fuel cost over recovery	174	2
-Customer refunds	(223)	(35)
-Other current liabilities	42	(102)
Net cash provided from operating activities	2,847	2,513
Investing Activities:
Property additions	(3,202)	(3,484)
Nuclear decommissioning trust fund purchases	(524)	(405)
Nuclear decommissioning trust fund sales	519	400
Proceeds from dispositions and asset sales	983	5,000
Cost of removal, net of salvage	(130)	(197)
Change in construction payables, net	(103)	(107)
Investment in unconsolidated subsidiaries	(78)	(134)
Payments pursuant to LTSAs	(91)	(64)
Other investing activities	(29)	(7)
Net cash provided from (used for) investing activities	(2,655)	1,002
Financing Activities:
Increase (decrease) in notes payable, net		83
Decrease in notes payable, net	(1,170)
Proceeds —
Long-term debt	4,293	1,390
Common stock	59	452
Short-term borrowings	615	250
Redemptions and repurchases —
Long-term debt	(2,444)	(2,560)
Short-term borrowings	(190)	(1,850)
Distributions to noncontrolling interests	(118)	(82)
Capital contributions from noncontrolling interests	172	5
Payment of common stock dividends	(1,332)	(1,269)
Other financing activities	(170)	(67)
Net cash used for financing activities	(285)	(3,648)
Net Change in Cash, Cash Equivalents, and Restricted Cash	(93)	(133)
Cash, Cash Equivalents, and Restricted Cash at Beginning of Period	1,978	1,519
Cash, Cash Equivalents, and Restricted Cash at End of Period	1,885	1,386
Cash paid (received) during the period for —
Interest, net of amounts capitalized	852	844
Income taxes, net	(8)	210
Accrued property additions at end of period	828	988
Right-of-use assets obtained under operating leases	87	55
Right-of-use assets obtained under finance leases	7	33
ALABAMA POWER CO
Operating Activities:
Net income	585	520
Adjustments to reconcile net income to net cash provided from operating activities —
Depreciation and amortization, total	484	493
Deferred income taxes	38	138
Allowance for equity funds used during construction	(22)	(28)
Pension, postretirement, and other employee benefits	(50)	(13)
Settlement of asset retirement obligations	(100)	(43)
Other, net	45	(1)
Changes in certain current assets and liabilities —
-Prepayments	(62)	(59)
-Materials and supplies	(38)	5
-Other current assets	(65)	(4)
-Accounts payable	(232)	(246)
-Accrued taxes	197	8
-Accrued compensation	(75)	(88)
-Retail fuel cost over recovery	66	0
-Customer refunds	(64)	(1)
-Other current liabilities	(33)	14
Net cash provided from operating activities	674	695
Investing Activities:
Property additions	(686)	(833)
Nuclear decommissioning trust fund purchases	(160)	(139)
Nuclear decommissioning trust fund sales	160	139
Cost of removal, net of salvage	(29)	(48)
Change in construction payables, net	(53)	(103)
Other investing activities	(15)	(18)
Net cash provided from (used for) investing activities	(783)	(1,002)
Proceeds —
Pollution control revenue bonds	87	0
Capital contributions from parent company	610	1,254
Redemptions and repurchases —
Pollution control revenue bonds	(87)	0
Senior notes	0	(200)
Payment of common stock dividends	(479)	(422)
Other financing activities	(15)	(15)
Net cash used for financing activities	116	617
Net Change in Cash, Cash Equivalents, and Restricted Cash	7	310
Cash, Cash Equivalents, and Restricted Cash at Beginning of Period	894	313
Cash, Cash Equivalents, and Restricted Cash at End of Period	901	623
Cash paid (received) during the period for —
Interest, net of amounts capitalized	161	154
Income taxes, net	0	63
Accrued property additions at end of period	147	168
Right-of-use assets obtained under operating leases	2	5
Right-of-use assets obtained under finance leases	1	1
GEORGIA POWER CO
Operating Activities:
Net income	638	759
Adjustments to reconcile net income to net cash provided from operating activities —
Depreciation and amortization, total	800	583
Deferred income taxes	(202)	153
Allowance for equity funds used during construction	(40)	(31)
Pension, postretirement, and other employee benefits	(55)	(56)
Settlement of asset retirement obligations	(78)	(76)
Estimated loss on Plant Vogtle Units 3 and 4	149	0
Storm damage reserve accruals	107	15
Other, net	19	17
Changes in certain current assets and liabilities —
-Receivables	(73)	(43)
-Fossil fuel stock	(52)	(26)
-Prepaid income taxes	0	63
-Materials and supplies	(61)	2
-Other current assets	(26)	19
-Accounts payable	0	(94)
-Accrued taxes	87	(139)
-Accrued compensation	(69)	(32)
-Retail fuel cost over recovery	109	0
-Customer refunds	(159)	(19)
-Other current liabilities	30	17
Net cash provided from operating activities	1,124	1,112
Investing Activities:
Property additions	(1,650)	(1,712)
Nuclear decommissioning trust fund purchases	(365)	(266)
Nuclear decommissioning trust fund sales	359	260
Proceeds from dispositions and asset sales	143	9
Cost of removal, net of salvage	(62)	(107)
Change in construction payables, net	(48)	(5)
Payments pursuant to LTSAs	(41)	(9)
Other investing activities	5	(4)
Net cash provided from (used for) investing activities	(1,659)	(1,834)
Financing Activities:
Increase (decrease) in notes payable, net		11
Decrease in notes payable, net	(25)
Proceeds —
FFB loan	519	835
Senior notes	1,500	0
Pollution control revenue bonds	53	513
Short-term borrowings	250	250
Capital contributions from parent company	500	46
Redemptions and repurchases —
Pollution control revenue bonds	(148)	(223)
Senior notes	(950)	0
FFB loan	(32)	0
Payment of common stock dividends	(771)	(788)
Other financing activities	(27)	(24)
Net cash used for financing activities	869	620
Net Change in Cash, Cash Equivalents, and Restricted Cash	334	(102)
Cash, Cash Equivalents, and Restricted Cash at Beginning of Period	52	112
Cash, Cash Equivalents, and Restricted Cash at End of Period	386	10
Cash paid (received) during the period for —
Interest, net of amounts capitalized	180	179
Income taxes, net	0	(6)
Accrued property additions at end of period	478	650
Right-of-use assets obtained under operating leases	29	13
Right-of-use assets obtained under finance leases	0	28
MISSISSIPPI POWER CO
Operating Activities:
Net income	71	74
Adjustments to reconcile net income to net cash provided from operating activities —
Depreciation and amortization, total	92	98
Deferred income taxes	(13)	(16)
Settlement of asset retirement obligations	(9)	(17)
Other, net	9	12
Changes in certain current assets and liabilities —
-Receivables	(7)	(8)
-Other current assets	(6)	(3)
-Accounts payable	(19)	(28)
-Accrued taxes	(21)	(43)
-Accrued compensation	(15)	(15)
-Other current liabilities	(11)	6
Net cash provided from operating activities	71	60
Investing Activities:
Property additions	(111)	(95)
Change in construction payables, net	(14)	(12)
Payments pursuant to LTSAs	(10)	(11)
Other investing activities	(10)	(10)
Net cash provided from (used for) investing activities	(145)	(128)
Proceeds —
Pollution control revenue bonds	34	43
Short-term borrowings	40	0
Capital contributions from parent company	75	7
Other long-term debt	100	0
Redemptions and repurchases —
Short-term borrowings	(40)	0
Pollution control revenue bonds	(41)	0
Senior notes	(275)	0
Return of capital to parent company	(74)	(75)
Other financing activities	3	(1)
Net cash used for financing activities	(178)	(26)
Net Change in Cash, Cash Equivalents, and Restricted Cash	(252)	(94)
Cash, Cash Equivalents, and Restricted Cash at Beginning of Period	286	293
Cash, Cash Equivalents, and Restricted Cash at End of Period	34	199
Cash paid (received) during the period for —
Interest, net of amounts capitalized	33	36
Income taxes, net	0	23
Accrued property additions at end of period	21	23
SOUTHERN POWER CO
Operating Activities:
Net income	112	230
Adjustments to reconcile net income to net cash provided from operating activities —
Depreciation and amortization, total	251	251
Deferred income taxes	(34)	(63)
Utilization of federal investment tax credits	0	427
Amortization of investment tax credits	(30)	(122)
(Gain) loss on dispositions, net	(39)	(23)
Other, net	(31)	(46)
Changes in certain current assets and liabilities —
-Receivables	(67)	(9)
-Prepaid income taxes	73	93
-Other current assets	(8)	4
-Accounts payable	(29)	(17)
-Accrued taxes	16	19
-Other current liabilities	(19)	(25)
Net cash provided from operating activities	195	719
Investing Activities:
Business acquisitions, net of cash acquired	(81)	(2)
Property additions	(101)	(123)
Proceeds from dispositions and asset sales	660	540
Investment in unconsolidated subsidiaries	0	(116)
Payments pursuant to LTSAs	(31)	(31)
Other investing activities	43	(14)
Net cash provided from (used for) investing activities	490	254
Financing Activities:
Decrease in notes payable, net	(357)	0
Redemptions and repurchases —
Short-term borrowings	(100)	(100)
Senior notes	(300)	0
Return of capital to parent company	0	(505)
Distributions to noncontrolling interests	(118)	(82)
Capital contributions from noncontrolling interests	172	5
Payment of common stock dividends	(100)	(103)
Other financing activities	(5)	1
Net cash used for financing activities	(808)	(784)
Net Change in Cash, Cash Equivalents, and Restricted Cash	(123)	189
Cash, Cash Equivalents, and Restricted Cash at Beginning of Period	279	181
Cash, Cash Equivalents, and Restricted Cash at End of Period	156	370
Cash paid (received) during the period for —
Interest, net of amounts capitalized	96	106
Income taxes, net	(5)	(421)
Accrued property additions at end of period	38	31
Right-of-use assets obtained under operating leases	30	0
SOUTHERN Co GAS
Operating Activities:
Net income	346	376
Adjustments to reconcile net income to net cash provided from operating activities —
Depreciation and amortization, total	243	238
Deferred income taxes	40	59
Mark-to-market adjustments	34	30
Other, net	11	(26)
Changes in certain current assets and liabilities —
-Receivables	344	717
-Natural gas for sale	182	256
-Other current assets	6	29
-Accounts payable	(176)	(604)
-Accrued taxes	26	(54)
-Accrued compensation	(31)	(34)
-Other current liabilities	21	(56)
Net cash provided from operating activities	1,046	931
Investing Activities:
Property additions	(647)	(603)
Proceeds from dispositions and asset sales	178	32
Cost of removal, net of salvage	(31)	(33)
Investment in unconsolidated subsidiaries	(78)	(18)
Other investing activities	8	36
Net cash provided from (used for) investing activities	(570)	(586)
Financing Activities:
Decrease in notes payable, net	(321)	(158)
Proceeds —
Capital contributions from parent company	186	38
Redemptions and repurchases —
Payment of common stock dividends	(266)	(235)
Net cash used for financing activities	(401)	(355)
Net Change in Cash, Cash Equivalents, and Restricted Cash	75	(10)
Cash, Cash Equivalents, and Restricted Cash at Beginning of Period	49	70
Cash, Cash Equivalents, and Restricted Cash at End of Period	124	60
Cash paid (received) during the period for —
Interest, net of amounts capitalized	119	125
Income taxes, net	(4)	96
Accrued property additions at end of period	$ 123	$ 123