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Derivatives (Tables)
9 Months Ended
Sep. 30, 2023
Derivative Instruments and Hedging Activities Disclosure [Abstract]  
Schedule of Energy-Related Derivatives
At September 30, 2023, the net volume of energy-related derivative contracts for natural gas positions, together with the longest hedge date over which the respective entity is hedging its exposure to the variability in future cash flows for forecasted transactions and the longest non-hedge date for derivatives not designated as hedges, were as follows:
Net
Purchased
mmBtu
Longest
Hedge
Date
Longest
Non-Hedge
Date
(in millions)
Southern Company(*)
42220302028
Alabama Power1092026
Georgia Power1042026
Mississippi Power802027
Southern Power820302024
Southern Company Gas(*)
12120272028
(*)Southern Company Gas' derivative instruments include both long and short natural gas positions. A long position is a contract to purchase natural gas and a short position is a contract to sell natural gas. Southern Company Gas' volume represents the net of 135.5 million mmBtu long natural gas positions and 14.2 million mmBtu short natural gas positions at September 30, 2023, which is also included in Southern Company's total volume.
Schedule of Interest Rate Derivatives
At September 30, 2023, the following interest rate derivatives were outstanding:
Notional
Amount
Weighted
Average Interest
Rate Paid
Interest
Rate
Received
Hedge
Maturity
Date
Fair Value Gain (Loss) at September 30, 2023
 (in millions)   (in millions)
Fair Value Hedges of Existing Debt
Southern Company parent$400 
1-month SOFR + 0.80%
1.75%March 2028$(56)
Southern Company parent1,000 
1-month SOFR + 2.48%
3.70%April
2030
(196)
Southern Company Gas500 
1-month SOFR + 0.49%
1.75%January 2031(99)
Southern Company$1,900 $(351)
Schedule of Foreign Currency Derivatives
At September 30, 2023, the following foreign currency derivatives were outstanding:
Pay NotionalPay
Rate
Receive NotionalReceive
Rate
Hedge
Maturity Date
Fair Value Gain (Loss) at September 30, 2023
(in millions)(in millions) (in millions)
Cash Flow Hedges of Existing Debt
Southern Power$564 3.78%500 1.85%June 2026$(42)
Fair Value Hedges of Existing Debt
Southern Company parent1,476 3.39%1,250 1.88%September 2027(150)
Southern Company$2,040 1,750 $(192)
Schedule of Derivative Category and Balance Sheet Location
The fair value of energy-related derivatives, interest rate derivatives, and foreign currency derivatives was reflected in the balance sheets as follows:
At September 30, 2023At December 31, 2022
Derivative Category and Balance Sheet LocationAssetsLiabilitiesAssetsLiabilities
(in millions)(in millions)
Southern Company
Energy-related derivatives designated as hedging instruments for regulatory purposes
Assets from risk management activities/Liabilities from risk management activities$34 $134 $123 $121 
Other deferred charges and assets/Other deferred credits and liabilities36 77 52 44 
Total derivatives designated as hedging instruments for regulatory purposes70 211 175 165 
Derivatives designated as hedging instruments in cash flow and fair value hedges
Energy-related derivatives:
Assets from risk management activities/Liabilities from risk management activities 28 27 
Other deferred charges and assets/Other deferred credits and liabilities4 2 
Interest rate derivatives:
Assets from risk management activities/Liabilities from risk management activities 80 12 62 
Other deferred charges and assets/Other deferred credits and liabilities 271 — 240 
Foreign currency derivatives:
Assets from risk management activities/Liabilities from risk management activities 35 — 34 
Other deferred charges and assets/Other deferred credits and liabilities 157 — 182 
Total derivatives designated as hedging instruments in cash flow and fair value hedges4 573 21 549 
Energy-related derivatives not designated as hedging instruments
Assets from risk management activities/Liabilities from risk management activities5 8 13 13 
Other deferred charges and assets/Other deferred credits and liabilities1 2 
Total derivatives not designated as hedging instruments6 10 15 14 
Gross amounts recognized80 794 211 728 
Gross amounts offset(a)
(37)(86)(70)(111)
Net amounts recognized in the Balance Sheets(b)
$43 $708 $141 $617 
At September 30, 2023At December 31, 2022
Derivative Category and Balance Sheet LocationAssetsLiabilitiesAssetsLiabilities
(in millions)(in millions)
Alabama Power(c)
Energy-related derivatives designated as hedging instruments for regulatory purposes
Other current assets/Other current liabilities$15 $46 $42 $21 
Other deferred charges and assets/Other deferred credits and liabilities11 29 20 18 
Total derivatives designated as hedging instruments for regulatory purposes26 75 62 39 
Gross amounts offset(17)(17)(24)(24)
Net amounts recognized in the Balance Sheets$9 $58 $38 $15 
Georgia Power
Energy-related derivatives designated as hedging instruments for regulatory purposes
Other current assets/Other current liabilities
$4 $57 $36 $43 
Other deferred charges and assets/Other deferred credits and liabilities10 26 18 
Total derivatives designated as hedging instruments for regulatory purposes14 83 42 61 
Energy-related derivatives not designated as hedging instruments
Other current assets/Other current liabilities  — 
Gross amounts recognized14 83 42 62 
Gross amounts offset(11)(11)(21)(21)
Net amounts recognized in the Balance Sheets$3 $72 $21 $41 
Mississippi Power(c)
Energy-related derivatives designated as hedging instruments for regulatory purposes
Other current assets/Other current liabilities
$9 $22 $33 $24 
Other deferred charges and assets/Other deferred credits and liabilities15 22 26 
Total derivatives designated as hedging instruments for regulatory purposes24 44 59 32 
Gross amounts offset(17)(17)(17)(17)
Net amounts recognized in the Balance Sheets$7 $27 $42 $15 
At September 30, 2023At December 31, 2022
Derivative Category and Balance Sheet LocationAssetsLiabilitiesAssetsLiabilities
(in millions)(in millions)
Southern Power
Derivatives designated as hedging instruments in cash flow and fair value hedges
Energy-related derivatives:
Other current assets/Other current liabilities$ $5 $— $12 
Other deferred charges and assets/Other deferred credits and liabilities4  — 
Foreign currency derivatives:
Other current assets/Other current liabilities 11 — 11 
Other deferred charges and assets/Other deferred credits and liabilities 31 — 36 
Total derivatives designated as hedging instruments in cash flow and fair value hedges4 47 59 
Energy-related derivatives not designated as hedging instruments
Other current assets/Other current liabilities1 1 — 
Other deferred charges and assets/Other deferred credits and liabilities  — 
Total derivatives not designated as hedging instruments1 1 — 
Gross amounts recognized5 48 59 
Gross amounts offset(1)(1)— — 
Net amounts recognized in the Balance Sheets$4 $47 $$59 
Southern Company Gas
Energy-related derivatives designated as hedging instruments for regulatory purposes
Other current assets/Other current liabilities$6 $9 $12 $33 
Derivatives designated as hedging instruments in cash flow and fair value hedges
Energy-related derivatives:
Other current assets/Other current liabilities 23 15 
Other deferred charges and assets/Other deferred credits and liabilities 2 
Interest rate derivatives:
Other current assets/Other current liabilities 21 — 14 
Other deferred charges and assets/Other deferred credits and liabilities 78 — 72 
Total derivatives designated as hedging instruments in cash flow and fair value hedges 124 105 
Energy-related derivatives not designated as hedging instruments
Other current assets/Other current liabilities4 7 11 12 
Other deferred charges and assets/Other deferred credits and liabilities1 2 
Total derivatives not designated as hedging instruments5 9 12 13 
Gross amounts recognized11 142 28 151 
Gross amounts offset(a)
9 (40)— (41)
Net amounts recognized in the Balance Sheets(b)
$20 $102 $28 $110 
(a)Gross amounts offset includes cash collateral held on deposit in broker margin accounts of $49 million and $41 million at September 30, 2023 and December 31, 2022, respectively.
(b)Net amounts of derivative instruments outstanding exclude immaterial premium and intrinsic value associated with weather derivatives for both periods presented.
(c)Energy-related derivatives not designated as hedging instruments were immaterial for Alabama Power and Mississippi Power at December 31, 2022. There were no such instruments for Alabama Power and Mississippi Power at September 30, 2023.
Schedule of Pre-tax Effects of Unrealized Derivative Gains (Losses)
At September 30, 2023 and December 31, 2022, the pre-tax effects of unrealized derivative gains (losses) arising from energy-related derivative instruments designated as regulatory hedging instruments and deferred were as follows:
Regulatory Hedge Unrealized Gain (Loss) Recognized in the Balance Sheet
Derivative Category and Balance Sheet
Location
Southern
Company
Alabama
Power
Georgia
Power
Mississippi
Power
Southern Company Gas
 (in millions)
At September 30, 2023:
Energy-related derivatives:
Other regulatory assets, current$(113)$(39)$(54)$(16)$(4)
Other regulatory assets, deferred(48)(19)(18)(11)— 
Other regulatory liabilities, current23 10 
Other regulatory liabilities, deferred— 
Total energy-related derivative gains (losses)$(132)$(49)$(69)$(20)$
At December 31, 2022:
Energy-related derivatives:
Other regulatory assets, current$(71)$(8)$(26)$(13)$(24)
Other regulatory assets, deferred(23)(7)(14)(2)— 
Other regulatory liabilities, current72 29 19 22 
Other regulatory liabilities, deferred31 20 — 
Total energy-related derivative gains (losses)$$23 $(19)$27 $(22)
Schedule of Pre-Tax Effects of Hedging on AOCI
For the three and nine months ended September 30, 2023 and 2022, the pre-tax effects of cash flow and fair value hedge accounting on accumulated OCI for the applicable Registrants were as follows:
Gain (Loss) Recognized in OCI on DerivativesFor the Three Months Ended September 30,For the Nine Months Ended September 30,
2023202220232022
(in millions)(in millions)
Southern Company
Cash flow hedges:
Energy-related derivatives$(4)$11 $(55)$51 
Interest rate derivatives(3)(12)36 
Foreign currency derivatives(15)(35)(6)(137)
Fair value hedges(*):
Foreign currency derivatives27 20 28 18 
Total$$$(45)$(32)
Georgia Power
Cash flow hedges:
Interest rate derivatives$— $— $(3)$31 
Southern Power
Cash flow hedges:
Energy-related derivatives$— $(11)$(14)$(4)
Foreign currency derivatives(15)(35)(6)(137)
Total$(15)$(46)$(20)$(141)
Southern Company Gas
Cash flow hedges:
Energy-related derivatives$(4)$22 $(41)$55 
Interest rate derivatives(4)— — 
Total$(8)$27 $(41)$55 
(*)Represents amounts excluded from the assessment of effectiveness for which the difference between changes in fair value and periodic amortization is recorded in OCI.
Schedule of Pre-Tax Effects of Cash Flow and Fair Value Hedging on Income
For the three and nine months ended September 30, 2023 and 2022, the pre-tax effects of cash flow and fair value hedge accounting on income were as follows:
Location and Amount of Gain (Loss) Recognized in Income on Cash Flow and Fair Value Hedging RelationshipsFor the Three Months Ended September 30,For the Nine Months Ended September 30,
2023202220232022
(in millions)(in millions)
Southern Company
Total cost of natural gas$102 $294 $1,199 $1,840 
Gain (loss) on energy-related cash flow hedges(a)
(4)(32)28 
Total other operations and maintenance1,424 1,527 4,352 4,568 
Gain (loss) on energy-related cash flow hedges(a)
(1)— (2)— 
Total depreciation and amortization1,143 922 3,365 2,728 
Gain (loss) on energy-related cash flow hedges(a)
(5)(1)(18)
Total interest expense, net of amounts capitalized(620)(511)(1,812)(1,461)
Gain (loss) on interest rate cash flow hedges(a)
(22)(7)(31)(19)
Gain (loss) on foreign currency cash flow hedges(a)
(3)(3)(8)(16)
Gain (loss) on interest rate fair value hedges(b)
(47)(102)(50)(300)
Total other income (expense), net141 132 428 414 
Gain (loss) on foreign currency cash flow hedges(a)(c)
(14)(32)(4)(129)
Gain (loss) on foreign currency fair value hedges(7)(59)19 (180)
Amount excluded from effectiveness testing recognized in earnings(27)(21)(28)(17)
Southern Power
Total depreciation and amortization$130 $133 $380 $384 
Gain (loss) on energy-related cash flow hedges(a)
(5)(1)(18)
Total interest expense, net of amounts capitalized(32)(32)(98)(105)
Gain (loss) on foreign currency cash flow hedges(a)
(3)(3)(8)(16)
Total other income (expense), net
Gain (loss) on foreign currency cash flow hedges(a)(c)
(14)(32)(4)(129)
Southern Company Gas
Total cost of natural gas$102 $294 $1,199 $1,840 
Gain (loss) on energy-related cash flow hedges(a)
(4)(32)28 
Total other operations and maintenance
264 252 879 824 
Gain (loss) on energy-related cash flow hedges(a)
(1) (2)— 
Total interest expense, net of amounts capitalized(77)(65)(226)(187)
Gain (loss) on interest rate cash flow hedges(a)
(18)(2)(18)(3)
Gain (loss) on interest rate fair value hedges(b)
(11)(30)(14)(87)
(a)Reclassified from accumulated OCI into earnings.
(b)For fair value hedges, changes in the fair value of the derivative contracts are generally equal to changes in the fair value of the underlying debt and have no material impact on income.
(c)The reclassification from accumulated OCI into other income (expense), net completely offsets currency gains and losses arising from changes in the U.S. currency exchange rates used to record the euro-denominated notes.
Schedule of Cumulative Basis Adjustments for Fair Value Hedges
At September 30, 2023 and December 31, 2022, the following amounts were recorded on the balance sheets related to cumulative basis adjustments for fair value hedges:
Carrying Amount of the Hedged ItemCumulative Amount of Fair Value Hedging Adjustment included in Carrying Amount of the Hedged Item
Balance Sheet Location of Hedged ItemsAt September 30, 2023At December 31, 2022At September 30, 2023At December 31, 2022
(in millions)(in millions)
Southern Company
Long-term debt$(2,873)$(2,927)$328 $282 
Southern Company Gas
Long-term debt$(402)$(415)$95 $81 
Schedule of Pre-tax Effect of Interest Rate and Energy Related Derivatives on Income
For the three and nine months ended September 30, 2023 and 2022, the pre-tax effects of energy-related derivatives not designated as hedging instruments on the statements of income of Southern Company and Southern Company Gas were as follows:
Gain (Loss)
Three Months Ended September 30,
Nine Months Ended
September 30,
Derivatives in Non-Designated Hedging RelationshipsStatements of Income Location2023202220232022
(in millions)(in millions)
Energy-related derivatives:
Natural gas revenues(*)
$ $$ $(10)
Cost of natural gas7 (2)36 (7)
Total derivatives in non-designated hedging relationships$7 $$36 $(17)
(*)Excludes $14 million of gains for the nine months ended September 30, 2023, and immaterial amounts for all other periods presented, recorded in natural gas revenues associated with weather derivatives.