v3.26.1
Condensed Consolidated Statements of Cash Flows (Unaudited) - GAS - USD ($)
$ in Millions
 6 Months Ended
Jun. 30, 2026
Jun. 30, 2025
Operating Activities:    
Net income $ 2,531 $ 2,214
Adjustments to reconcile net income to net cash provided from operating activities —    
Depreciation and amortization, total 3,176 2,860
Deferred income taxes 310 453
Other, net (87) 76
Changes in certain current assets and liabilities —    
Receivables 116 (130)
Natural gas for sale, net of temporary LIFO liquidation 197 233
Other current assets (60) 61
Accounts payable (403) (695)
Accrued compensation (459) (421)
Other current liabilities 105 (141)
Net cash provided from operating activities 4,280 3,431
Investing Activities:    
Property additions (6,639) (5,456)
Contributions in aid of construction 313 219
Cost of removal, net of salvage (349) (304)
Other investing activities (83) (193)
Net cash used for investing activities (6,758) (5,734)
Financing Activities:    
Increase (decrease) in notes payable, net   (150)
Increase in notes payable, net 1,415  
Payment of common stock dividends (1,579) (1,494)
Other financing activities (233) (150)
Net cash provided from financing activities 3,828 2,467
Net Change in Cash, Cash Equivalents, and Restricted Cash 1,350 164
Cash, Cash Equivalents, and Restricted Cash at Beginning of Period 1,640 1,101
Cash, Cash Equivalents, and Restricted Cash at End of Period 2,990 1,265
Supplemental Cash Flow Information:    
Interest, net of amounts capitalized 1,472 1,287
Income taxes, net (excludes credit transfers) 146 199
Noncash transactions —    
Accrued property additions at end of period 1,409 1,091
Right-of-use assets obtained under operating leases 107 114
SOUTHERN Co GAS    
Operating Activities:    
Net income 573 524
Adjustments to reconcile net income to net cash provided from operating activities —    
Depreciation and amortization, total 366 338
Deferred income taxes 89 67
Other, net 40 26
Changes in certain current assets and liabilities —    
Receivables 427 209
Natural gas for sale, net of temporary LIFO liquidation 197 233
Other current assets (12) 37
Accounts payable (152) (105)
Accrued compensation (39) (44)
Natural gas cost over recovery 34 (87)
Other current liabilities (15) 12
Net cash provided from operating activities 1,508 1,210
Investing Activities:    
Property additions (799) (704)
Contributions in aid of construction 11 27
Cost of removal, net of salvage (39) (42)
Change in construction payables, net 26 15
Capital contributions to unconsolidated subsidiaries (93) (31)
Other investing activities 5 0
Net cash used for investing activities (889) (735)
Financing Activities:    
Increase (decrease) in notes payable, net (190)  
Increase in notes payable, net   16
Proceeds — Other long-term debt 500 0
Redemptions — Senior notes (350) 0
Redemptions - First mortgage bonds (100) 0
Return of capital to parent company 0 (23)
Capital contributions from parent company 22 22
Payment of common stock dividends (281) (297)
Other financing activities (17) (12)
Net cash provided from financing activities (416) (294)
Net Change in Cash, Cash Equivalents, and Restricted Cash 203 181
Cash, Cash Equivalents, and Restricted Cash at Beginning of Period 15 44
Cash, Cash Equivalents, and Restricted Cash at End of Period 218 225
Supplemental Cash Flow Information:    
Interest, net of amounts capitalized 201 185
Income taxes, net (excludes credit transfers) 55 66
Noncash transactions —    
Accrued property additions at end of period 138 101
Right-of-use assets obtained under operating leases 1 60
Return of capital to parent company $ 0 $ 33