ACQUISITIONS AND DISPOSITIONS - GAS Acquisitions and Dispositions Narrative (Details) - Disposal Group, Disposed of by Sale, Not Discontinued Operations - Natural Gas Storage Facilities - Southern Company Gas $ in Millions |
3 Months Ended | |
|---|---|---|
|
Dec. 31, 2022
USD ($)
|
Sep. 30, 2022
USD ($)
storageFacility
|
|
| Business Acquisition [Line Items] | ||
| Number of natural gas storage facilities sold | storageFacility | 2 | |
| Consideration for sale | $ 186 | |
| Gain (loss) on dispositions | $ (131) | |
| Gain (loss) on dispositions, after tax | $ (99) |