Condensed Consolidated Balance Sheets (Unaudited) - GAS - USD ($) $ in Millions	Jun. 30, 2023	Dec. 31, 2022
Current Assets:
Cash and cash equivalents	$ 2,123	$ 1,917
Receivables —
Customer and affiliated accounts, net	1,852	2,128
Unbilled revenues	682	1,012
Other accounts and notes	568	637
Accumulated provision for uncollectible accounts	(84)	(71)
Natural gas for sale	234	438
Prepaid expenses	504	347
Natural gas cost under recovery	0	108
Other regulatory assets	930	860
Other current assets	310	344
Total current assets	10,979	10,416
Property, Plant, and Equipment:
In service	119,852	117,529
Less: Accumulated depreciation	36,500	35,297
Plant in service, net of depreciation	83,352	82,232
Construction work in progress	11,992	10,896
Total property, plant, and equipment	96,767	94,570
Other Property and Investments:
Goodwill	5,161	5,161
Equity investments in unconsolidated subsidiaries	1,382	1,443
Other intangible assets, net of amortization	386	406
Miscellaneous property and investments	618	602
Total other property and investments	9,845	9,757
Deferred Charges and Other Assets:
Operating lease right-of-use assets, net of amortization	1,481	1,531
Prepaid pension costs	2,478	2,290
Other regulatory assets, deferred	5,806	5,918
Other deferred charges and assets	1,469	1,485
Total deferred charges and other assets	19,525	20,148
Total Assets	137,116	134,891
Current Liabilities:
Securities due within one year	4,063	4,285
Notes payable	1,647	2,609
Accounts payable —
Customer deposits	493	502
Accrued interest	652	614
Accrued compensation	719	1,127
Natural gas cost over recovery	161	0
Other regulatory liabilities	268	382
Other current liabilities	870	787
Total current liabilities	13,240	15,724
Long-term Debt	55,134	50,656
Deferred Credits and Other Liabilities:
Accumulated deferred income taxes	10,623	10,036
Deferred credits related to income taxes	4,965	5,235
Employee benefit obligations	1,217	1,238
Operating lease obligations, deferred	1,356	1,388
Other cost of removal obligations	1,932	1,903
Other deferred credits and liabilities	1,092	1,167
Total deferred credits and other liabilities	34,094	33,979
Total Liabilities	102,468	100,359
Total Stockholders' Equity	34,648	34,532
Total Liabilities and Stockholders' Equity	137,116	134,891
SOUTHERN Co GAS
Current Assets:
Cash and cash equivalents	242	81
Receivables —
Customer and affiliated accounts, net	319	616
Unbilled revenues	86	453
Other accounts and notes	77	76
Accumulated provision for uncollectible accounts	(62)	(50)
Natural gas for sale	234	438
Prepaid expenses	115	93
Natural gas cost under recovery	0	108
Other regulatory assets	127	119
Other current assets	119	104
Total current assets	1,257	2,038
Property, Plant, and Equipment:
In service	20,113	19,723
Less: Accumulated depreciation	5,411	5,276
Plant in service, net of depreciation	14,702	14,447
Construction work in progress	1,179	909
Total property, plant, and equipment	15,881	15,356
Other Property and Investments:
Goodwill	5,015	5,015
Equity investments in unconsolidated subsidiaries	1,252	1,276
Other intangible assets, net of amortization	21	26
Miscellaneous property and investments	25	28
Total other property and investments	6,313	6,345
Deferred Charges and Other Assets:
Operating lease right-of-use assets, net of amortization	55	57
Prepaid pension costs	197	183
Other regulatory assets, deferred	477	497
Other deferred charges and assets	151	145
Total deferred charges and other assets	880	882
Total Assets	24,331	24,621
Current Liabilities:
Securities due within one year	401	400
Notes payable	196	768
Accounts payable —
Customer deposits	115	125
Accrued taxes	63	77
Accrued interest	68	67
Accrued compensation	70	105
Natural gas cost over recovery	161	0
Other regulatory liabilities	85	36
Other current liabilities	176	187
Total current liabilities	1,883	2,570
Long-term Debt	7,050	7,042
Deferred Credits and Other Liabilities:
Accumulated deferred income taxes	1,611	1,560
Deferred credits related to income taxes	774	788
Employee benefit obligations	109	120
Operating lease obligations, deferred	48	51
Other cost of removal obligations	1,735	1,707
Accrued environmental remediation	190	207
Other deferred credits and liabilities	193	179
Total deferred credits and other liabilities	4,660	4,612
Total Liabilities	13,593	14,224
Total Stockholders' Equity	10,738	10,397
Total Liabilities and Stockholders' Equity	24,331	24,621
SOUTHERN Co GAS | Related Party
Accounts payable —
Affiliated	125	104
Other	125	104
SOUTHERN Co GAS | Nonrelated Party
Accounts payable —
Affiliated	423	701
Other	$ 423	$ 701