Consolidated Balance Sheets - GAS - USD ($) $ in Millions	Dec. 31, 2023	Dec. 31, 2022
Current Assets:
Cash and cash equivalents	$ 748	$ 1,917
Receivables —
Customer accounts	2,030	2,128
Unbilled revenues	786	1,012
Other accounts and notes	519	637
Accumulated provision for uncollectible accounts	(68)	(71)
Natural gas for sale	420	438
Prepaid expenses	406	347
Natural gas cost under recovery	0	108
Other regulatory assets	1,120	860
Other current assets	533	344
Total current assets	10,432	10,416
Property, Plant, and Equipment:
In service	128,428	117,529
Less: Accumulated depreciation	37,725	35,297
Plant in service, net of depreciation	90,703	82,232
Construction work in progress	7,784	10,896
Total property, plant, and equipment	99,844	94,570
Other Property and Investments:
Goodwill	5,161	5,161
Equity investments in unconsolidated subsidiaries	1,368	1,443
Other intangible assets, net of amortization	368	406
Miscellaneous property and investments	665	602
Total other property and investments	9,986	9,757
Deferred Charges and Other Assets:
Operating lease right-of-use assets, net of amortization	1,432	1,531
Prepaid pension costs	2,079	2,290
Other regulatory assets, deferred	6,264	5,918
Other deferred charges and assets	1,468	1,485
Total deferred charges and other assets	19,069	20,148
Total Assets	139,331	134,891
Current Liabilities:
Securities due within one year	2,476	4,285
Notes payable	2,314	2,609
Accounts payable —
Customer deposits	503	502
Accrued compensation	1,151	1,127
Natural gas cost over recovery	214	0
Other regulatory liabilities	141	382
Other current liabilities	1,029	787
Total current liabilities	13,467	15,724
Long-Term Debt	57,210	50,656
Deferred Credits and Other Liabilities:
Accumulated deferred income taxes	10,990	10,036
Deferred credits related to income taxes	4,674	5,235
Employee benefit obligations	1,115	1,238
Operating lease obligations	1,307	1,388
Other cost of removal obligations	1,957	1,903
Other deferred credits and liabilities	1,031	1,167
Total deferred credits and other liabilities	33,429	33,979
Total Liabilities	104,106	100,359
Common Stockholders' Equity:
Paid-in capital	13,775	13,673
Accumulated deficit	12,482	11,538
Accumulated other comprehensive income (loss)	(177)	(167)
Total common stockholders' equity	31,444	30,408
Total Liabilities and Stockholders' Equity	139,331	134,891
Commitments and Contingent Matters
Operating lease obligations - current	183	197
Southern Company Gas
Current Assets:
Cash and cash equivalents	33	81
Receivables —
Customer accounts	405	616
Unbilled revenues	261	453
Other accounts and notes	47	76
Accumulated provision for uncollectible accounts	(44)	(50)
Natural gas for sale	420	438
Prepaid expenses	107	93
Natural gas cost under recovery	0	108
Other regulatory assets	141	119
Other current assets	116	104
Total current assets	1,486	2,038
Property, Plant, and Equipment:
In service	20,840	19,723
Less: Accumulated depreciation	5,534	5,276
Plant in service, net of depreciation	15,306	14,447
Construction work in progress	1,110	909
Total property, plant, and equipment	16,416	15,356
Other Property and Investments:
Goodwill	5,015	5,015
Equity investments in unconsolidated subsidiaries	1,235	1,276
Other intangible assets, net of amortization	16	26
Miscellaneous property and investments	25	28
Total other property and investments	6,291	6,345
Deferred Charges and Other Assets:
Operating lease right-of-use assets, net of amortization	47	57
Prepaid pension costs	158	183
Other regulatory assets, deferred	504	497
Other deferred charges and assets	181	145
Total deferred charges and other assets	890	882
Total Assets	25,083	24,621
Current Liabilities:
Securities due within one year	0	400
Notes payable	415	768
Accounts payable —
Affiliated and other	424	701
Customer deposits	126	125
Accrued taxes	77	77
Accrued compensation	112	105
Natural gas cost over recovery	214	0
Other regulatory liabilities	19	36
Other current liabilities	232	254
Total current liabilities	1,708	2,570
Long-Term Debt	7,833	7,042
Deferred Credits and Other Liabilities:
Accumulated deferred income taxes	1,671	1,560
Deferred credits related to income taxes	759	788
Employee benefit obligations	110	120
Operating lease obligations	40	51
Other cost of removal obligations	1,771	1,707
Accrued environmental remediation	192	207
Other deferred credits and liabilities	196	179
Total deferred credits and other liabilities	4,739	4,612
Total Liabilities	14,280	14,224
Common Stockholders' Equity:
Paid-in capital	10,836	10,445
Accumulated deficit	(49)	(79)
Accumulated other comprehensive income (loss)	16	31
Total common stockholders' equity	10,803	10,397
Total Liabilities and Stockholders' Equity	25,083	24,621
Commitments and Contingent Matters
Operating lease obligations - current	11	9
Southern Company Gas | Related Party
Accounts payable —
Affiliated and other	$ 89	$ 104