Condensed Consolidated Balance Sheets (Unaudited) - GAS - USD ($) $ in Millions	Jun. 30, 2024	Dec. 31, 2023
Current Assets:
Cash and cash equivalents	$ 1,152	$ 748
Receivables —
Customer accounts	2,239	2,030
Unbilled revenues	876	786
Other accounts and notes	549	519
Accumulated provision for uncollectible accounts	(77)	(68)
Materials and supplies	2,129	1,989
Natural gas for sale	223	420
Prepaid expenses	422	406
Other regulatory assets	980	1,120
Other current assets	525	569
Total current assets	10,993	10,432
Property, Plant, and Equipment:
In service	134,354	128,428
Less: Accumulated depreciation	38,995	37,725
Plant in service, net of depreciation	95,359	90,703
Construction work in progress	5,231	7,784
Total property, plant, and equipment	101,888	99,844
Other Property and Investments:
Goodwill	5,161	5,161
Equity investments in unconsolidated subsidiaries	1,385	1,368
Other intangible assets, net of amortization	350	368
Miscellaneous property and investments	684	665
Total other property and investments	10,129	9,986
Deferred Charges and Other Assets:
Operating lease right-of-use assets, net of amortization	1,430	1,432
Prepaid pension costs	2,279	2,079
Other regulatory assets, deferred	6,353	6,264
Other deferred charges and assets	1,449	1,468
Total deferred charges and other assets	18,927	19,069
Total Assets	141,937	139,331
Current Liabilities:
Notes payable	1,334	2,314
Accounts payable —
Customer deposits	466	503
Accrued interest	702	652
Accrued compensation	746	1,151
Natural gas cost over recovery	171	214
Other regulatory liabilities	135	141
Other current liabilities	1,271	1,029
Total current liabilities	12,028	13,467
Long-term Debt	59,883	57,210
Deferred Credits and Other Liabilities:
Accumulated deferred income taxes	11,339	10,990
Deferred credits related to income taxes	4,645	4,674
Employee benefit obligations	1,109	1,115
Operating lease obligations, deferred	1,309	1,307
Other cost of removal obligations	1,994	1,957
Other deferred credits and liabilities	1,160	1,031
Total deferred credits and other liabilities	33,915	33,429
Total Liabilities	105,826	104,106
Total Stockholders' Equity	36,111	35,225
Total Liabilities and Stockholders' Equity	141,937	139,331
SOUTHERN Co GAS
Current Assets:
Cash and cash equivalents	34	33
Receivables —
Customer accounts	274	405
Unbilled revenues	78	261
Other accounts and notes	62	47
Accumulated provision for uncollectible accounts	(49)	(44)
Materials and supplies	71	66
Natural gas for sale	223	420
Prepaid expenses	98	107
Other regulatory assets	187	141
Other current assets	36	50
Total current assets	1,014	1,486
Property, Plant, and Equipment:
In service	21,338	20,840
Less: Accumulated depreciation	5,711	5,534
Plant in service, net of depreciation	15,627	15,306
Construction work in progress	1,232	1,110
Total property, plant, and equipment	16,859	16,416
Other Property and Investments:
Goodwill	5,015	5,015
Equity investments in unconsolidated subsidiaries	1,246	1,235
Other intangible assets, net of amortization	13	16
Miscellaneous property and investments	25	25
Total other property and investments	6,299	6,291
Deferred Charges and Other Assets:
Operating lease right-of-use assets, net of amortization	43	47
Prepaid pension costs	169	158
Other regulatory assets, deferred	482	504
Other deferred charges and assets	189	181
Total deferred charges and other assets	883	890
Total Assets	25,055	25,083
Current Liabilities:
Notes payable	141	415
Accounts payable —
Customer deposits	84	126
Accrued taxes	57	77
Accrued interest	78	77
Accrued compensation	71	112
Natural gas cost over recovery	171	214
Other regulatory liabilities	26	19
Other current liabilities	140	155
Total current liabilities	1,200	1,708
Long-term Debt	7,821	7,833
Deferred Credits and Other Liabilities:
Accumulated deferred income taxes	1,876	1,671
Deferred credits related to income taxes	760	759
Employee benefit obligations	108	110
Operating lease obligations, deferred	35	40
Other cost of removal obligations	1,815	1,771
Accrued environmental remediation	192	192
Other deferred credits and liabilities	204	196
Total deferred credits and other liabilities	4,990	4,739
Total Liabilities	14,011	14,280
Total Stockholders' Equity	11,044	10,803
Total Liabilities and Stockholders' Equity	25,055	25,083
SOUTHERN Co GAS | Related Party
Accounts payable —
Affiliated and Other	42	89
SOUTHERN Co GAS | Nonrelated Party
Accounts payable —
Affiliated and Other	$ 390	$ 424