Consolidated Balance Sheets - SPC - USD ($) $ in Millions	Dec. 31, 2021	Dec. 31, 2020
Current Assets:
Cash and cash equivalents	$ 1,798	$ 1,065
Receivables —
Customer accounts	1,806	1,753
Other accounts and notes	523	512
Materials and supplies	1,543	1,478
Other current assets	231	282
Total current assets	8,965	8,617
Property, Plant, and Equipment:
In service	115,592	110,516
Less: Accumulated depreciation	34,079	32,397
Plant in service, net of depreciation	81,513	78,119
Construction work in progress	8,771	8,697
Total property, plant, and equipment	91,108	87,634
Other Property and Investments:
Equity investments in unconsolidated subsidiaries	1,282	1,362
Total other property and investments	10,202	10,386
Deferred Charges and Other Assets:
Operating lease right-of-use assets, net of amortization	1,701	1,802
Other deferred charges and assets	1,776	1,288
Total deferred charges and other assets	17,259	16,298
Total Assets	127,534	122,935
Current Liabilities:
Securities due within one year	2,157	3,507
Notes payable	1,440	609
Accounts payable —
Accrued interest	533	513
Other current liabilities	872	968
Total current liabilities	10,921	12,079
Long-Term Debt	50,120	45,073
Deferred Credits and Other Liabilities:
Accumulated deferred income taxes	8,862	8,175
Accumulated deferred ITCs	2,216	2,235
Operating lease obligations, deferred	1,503	1,611
Other deferred credits and liabilities	816	696
Total deferred credits and other liabilities	33,926	33,258
Total Liabilities	94,967	90,410
Common Stockholders' Equity:
Common stock	5,279	5,268
Paid-in capital	11,950	11,834
Retained earnings (accumulated deficit)	10,929	11,311
Accumulated other comprehensive loss	(237)	(395)
Total common stockholders' equity	27,874	27,972
Noncontrolling Interests	4,402	4,262
Total Stockholders' Equity (See accompanying statements)	32,276	32,234
Total Liabilities and Stockholders' Equity	127,534	122,935
Commitments and Contingent Matters (See notes)
Southern Power
Current Assets:
Cash and cash equivalents	107	182
Receivables —
Customer accounts	139	125
Affiliated	51	37
Other accounts and notes	29	27
Materials and supplies	106	157
Prepaid income taxes	27	11
Other current assets	46	36
Total current assets	505	575
Property, Plant, and Equipment:
In service	14,585	13,904
Less: Accumulated depreciation	3,241	2,842
Plant in service, net of depreciation	11,344	11,062
Construction work in progress	45	127
Total property, plant, and equipment	11,389	11,189
Other Property and Investments:
Intangible assets, net of amortization of $109 and $89, respectively	282	302
Equity investments in unconsolidated subsidiaries	86	19
Net investment in sales-type leases	161	0
Total other property and investments	529	321
Deferred Charges and Other Assets:
Operating lease right-of-use assets, net of amortization	479	415
Prepaid LTSAs	210	155
Accumulated deferred income taxes	0	262
Income taxes receivable, non-current	20	25
Other deferred charges and assets	258	293
Total deferred charges and other assets	967	1,150
Total Assets	13,390	13,235
Current Liabilities:
Securities due within one year	679	299
Notes payable	211	175
Accounts payable —
Affiliated	92	65
Other	85	92
Accrued taxes	14	30
Accrued interest	32	32
Other current liabilities	140	132
Total current liabilities	1,253	825
Long-Term Debt	3,009	3,393
Deferred Credits and Other Liabilities:
Accumulated deferred income taxes	215	123
Accumulated deferred ITCs	1,614	1,672
Operating lease obligations, deferred	497	426
Other deferred credits and liabilities	204	165
Total deferred credits and other liabilities	2,530	2,386
Total Liabilities	6,792	6,604
Common Stockholders' Equity:
Common stock	0	0
Paid-in capital	638	914
Retained earnings (accumulated deficit)	1,585	1,522
Accumulated other comprehensive loss	(27)	(67)
Total common stockholders' equity	2,196	2,369
Noncontrolling Interests	4,402	4,262
Total Stockholders' Equity (See accompanying statements)	6,598	6,631
Total Liabilities and Stockholders' Equity	13,390	13,235
Commitments and Contingent Matters (See notes)