Condensed Consolidated Balance Sheets (Unaudited) - GAS - USD ($) $ in Millions	Sep. 30, 2024	Dec. 31, 2023
Current Assets:
Cash and cash equivalents	$ 1,018	$ 748
Receivables —
Customer accounts	2,327	2,030
Unbilled revenues	556	786
Other accounts and notes	909	519
Accumulated provision for uncollectible accounts	(64)	(68)
Materials and supplies	2,169	1,989
Natural gas for sale	417	420
Prepaid expenses	391	406
Other regulatory assets	877	1,120
Other current assets	562	569
Total current assets	11,040	10,432
Property, Plant, and Equipment:
In service	134,889	128,428
Less: Accumulated depreciation	39,536	37,725
Plant in service, net of depreciation	95,353	90,703
Construction work in progress	6,232	7,784
Total property, plant, and equipment	102,897	99,844
Other Property and Investments:
Goodwill	5,161	5,161
Equity investments in unconsolidated subsidiaries	1,414	1,368
Other intangible assets, net of amortization	341	368
Miscellaneous property and investments	657	665
Total other property and investments	10,223	9,986
Deferred Charges and Other Assets:
Operating lease right-of-use assets, net of amortization	1,415	1,432
Prepaid pension costs	2,375	2,079
Other regulatory assets, deferred	7,531	6,264
Other deferred charges and assets	1,484	1,468
Total deferred charges and other assets	19,796	19,069
Total Assets	143,956	139,331
Current Liabilities:
Securities due within one year	1,642	2,476
Notes payable	722	2,314
Accounts payable —
Customer deposits	491	503
Accrued interest	570	652
Accrued compensation	1,065	1,151
Natural gas cost over recovery	226	214
Other regulatory liabilities	214	141
Other current liabilities	1,104	1,029
Total current liabilities	12,165	13,467
Long-term Debt	61,254	57,210
Deferred Credits and Other Liabilities:
Accumulated deferred income taxes	11,727	10,990
Deferred credits related to income taxes	4,587	4,674
Employee benefit obligations	1,064	1,115
Operating lease obligations, deferred	1,267	1,307
Other cost of removal obligations	2,006	1,957
Other deferred credits and liabilities	1,075	1,031
Total deferred credits and other liabilities	33,632	33,429
Total Liabilities	107,051	104,106
Total Stockholders' Equity	36,905	35,225
Total Liabilities and Stockholders' Equity	143,956	139,331
SOUTHERN Co GAS
Current Assets:
Cash and cash equivalents	44	33
Receivables —
Customer accounts	215	405
Unbilled revenues	63	261
Other accounts and notes	54	47
Accumulated provision for uncollectible accounts	(31)	(44)
Materials and supplies	68	66
Natural gas for sale	417	420
Prepaid expenses	74	107
Other regulatory assets	220	141
Other current assets	43	50
Total current assets	1,167	1,486
Property, Plant, and Equipment:
In service	21,753	20,840
Less: Accumulated depreciation	5,790	5,534
Plant in service, net of depreciation	15,963	15,306
Construction work in progress	1,194	1,110
Total property, plant, and equipment	17,157	16,416
Other Property and Investments:
Goodwill	5,015	5,015
Equity investments in unconsolidated subsidiaries	1,279	1,235
Other intangible assets, net of amortization	11	16
Miscellaneous property and investments	25	25
Total other property and investments	6,330	6,291
Deferred Charges and Other Assets:
Operating lease right-of-use assets, net of amortization	41	47
Prepaid pension costs	175	158
Other regulatory assets, deferred	486	504
Other deferred charges and assets	189	181
Total deferred charges and other assets	891	890
Total Assets	25,545	25,083
Current Liabilities:
Securities due within one year	50	0
Notes payable	63	415
Accounts payable —
Customer deposits	105	126
Accrued taxes	68	77
Accrued interest	72	77
Accrued compensation	106	112
Natural gas cost over recovery	226	214
Other regulatory liabilities	6	19
Other current liabilities	136	155
Total current liabilities	1,247	1,708
Long-term Debt	8,387	7,833
Deferred Credits and Other Liabilities:
Accumulated deferred income taxes	1,861	1,671
Deferred credits related to income taxes	764	759
Employee benefit obligations	106	110
Operating lease obligations, deferred	33	40
Other cost of removal obligations	1,833	1,771
Accrued environmental remediation	204	192
Other deferred credits and liabilities	182	196
Total deferred credits and other liabilities	4,983	4,739
Total Liabilities	14,617	14,280
Total Stockholders' Equity	10,928	10,803
Total Liabilities and Stockholders' Equity	25,545	25,083
SOUTHERN Co GAS | Related Party
Accounts payable —
Affiliated and Other	48	89
SOUTHERN Co GAS | Nonrelated Party
Accounts payable —
Affiliated and Other	$ 367	$ 424