Condensed Consolidated Balance Sheets (Unaudited) - SPC - USD ($) $ in Millions	Mar. 31, 2024	Dec. 31, 2023
Current Assets:
Cash and cash equivalents	$ 713	$ 748
Receivables —
Customer accounts, net and Affiliated	2,191	2,030
Other	512	519
Materials and supplies	2,063	1,989
Other current assets	763	569
Total current assets	10,543	10,432
Property, Plant, and Equipment:
In service	129,228	128,428
Less: Accumulated depreciation	38,347	37,725
Plant in service, net of depreciation	90,881	90,703
Construction work in progress	8,225	7,784
Total property, plant, and equipment	100,470	99,844
Other Property and Investments:
Total other property and investments	10,100	9,986
Deferred Charges and Other Assets:
Operating lease right-of-use assets, net of amortization	1,400	1,432
Other deferred charges and assets	1,578	1,468
Total deferred charges and other assets	19,007	19,069
Total Assets	140,120	139,331
Current Liabilities:
Notes payable	2,445	2,314
Accounts payable —
Accrued interest	583	652
Operating lease obligations	184	183
Other current liabilities	1,108	1,029
Total current liabilities	11,458	13,467
Long-term Debt	59,361	57,210
Deferred Credits and Other Liabilities:
Accumulated deferred income taxes	11,195	10,990
Accumulated deferred ITCs	2,046	2,067
Operating lease obligations, deferred	1,292	1,307
Other deferred credits and liabilities	1,074	1,031
Total deferred credits and other liabilities	33,687	33,429
Total Liabilities	104,506	104,106
Total Stockholders' Equity (See accompanying statements)	35,614	35,225
Total Liabilities and Stockholders' Equity	140,120	139,331
SOUTHERN POWER CO
Current Assets:
Cash and cash equivalents	115	124
Receivables —
Other	43	54
Materials and supplies	83	80
Prepaid income taxes	42	2
Other current assets	85	90
Total current assets	506	523
Property, Plant, and Equipment:
In service	14,659	14,690
Less: Accumulated depreciation	4,200	4,119
Plant in service, net of depreciation	10,459	10,571
Construction work in progress	298	278
Total property, plant, and equipment	10,757	10,849
Other Property and Investments:
Intangible assets, net of amortization	238	243
Net investment in sales-type leases	147	148
Total other property and investments	385	391
Deferred Charges and Other Assets:
Operating lease right-of-use assets, net of amortization	486	488
Prepaid LTSAs	262	248
Other deferred charges and assets	266	262
Total deferred charges and other assets	1,014	998
Total Assets	12,662	12,761
Current Liabilities:
Notes payable	140	138
Accounts payable —
Accrued taxes	20	26
Accrued interest	27	27
Operating lease obligations	29	29
Other current liabilities	83	97
Total current liabilities	407	490
Long-term Debt	2,699	2,711
Deferred Credits and Other Liabilities:
Accumulated deferred income taxes	667	614
Accumulated deferred ITCs	1,483	1,498
Operating lease obligations, deferred	515	517
Other deferred credits and liabilities	248	233
Total deferred credits and other liabilities	2,913	2,862
Total Liabilities	6,019	6,063
Total Stockholders' Equity (See accompanying statements)	6,643	6,698
Total Liabilities and Stockholders' Equity	12,662	12,761
SOUTHERN POWER CO | Nonrelated Party
Receivables —
Customer accounts, net and Affiliated	124	136
Accounts payable —
Affiliated and Other	69	91
SOUTHERN POWER CO | Related Party
Receivables —
Customer accounts, net and Affiliated	14	37
Accounts payable —
Affiliated and Other	$ 39	$ 82