Derivatives (Tables)
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6 Months Ended |
Jun. 30, 2019 |
| Derivative Instruments and Hedging Activities Disclosure [Abstract] |
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| Schedule of Energy-Related Derivatives |
At June 30, 2019, 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(*) | 536 | | 2023 | | 2029 | Alabama Power | 88 | | 2022 | | — | Georgia Power | 200 | | 2022 | | — | Mississippi Power | 101 | | 2023 | | — | Southern Power | 8 | | 2020 | | — | Southern Company Gas(*) | 139 | | 2021 | | 2029 |
(*) 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 long natural gas positions of 4.0 billion mmBtu and short natural gas positions of 3.9 billion mmBtu as of June 30, 2019, which is also included in Southern Company's total volume.
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| Schedule of Interest Rate Derivatives |
At June 30, 2019, the following interest rate derivatives were outstanding: | | | | | | | | | | | | | | Notional Amount | | Interest Rate Received | Weighted Average Interest Rate Paid | Hedge Maturity Date | | Fair Value Gain (Loss) at June 30, 2019 | | (in millions) | | | | | | (in millions) | Cash Flow Hedges of Forecasted Debt | | | | | | | Georgia Power | $ | 250 |
| | 3-month LIBOR | 2.23% | March 2025 | | $ | (6 | ) | Georgia Power | 250 |
| | 3-month LIBOR | 2.39% | September 2029 | | (10 | ) | Georgia Power | 250 |
| | 3-month LIBOR | 2.40% | March 2030 | | (9 | ) | Georgia Power | 250 |
| | 3-month LIBOR | 2.48% | February 2044 | | (12 | ) | Fair Value Hedges of Existing Debt | | | | | | | Southern Company(*) | 300 |
| | 2.75% | 3-month LIBOR+0.92% | June 2020 | | (1 | ) | Southern Company(*) | 1,500 |
| | 2.35% | 1-month LIBOR+0.87% | July 2021 | | (14 | ) | Georgia Power | 200 |
| | 4.25% | 3-month LIBOR+2.46% | December 2019 | | (1 | ) | Southern Company Consolidated | $ | 3,000 |
| | | | | | $ | (53 | ) |
(*) Represents the Southern Company parent entity.
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| Schedule of Foreign Currency Derivatives |
At June 30, 2019, the following foreign currency derivatives were outstanding: | | | | | | | | | | | | | | | Pay Notional | Pay Rate | Receive Notional | Receive Rate | Hedge Maturity Date | Fair Value Gain (Loss) at June 30, 2019 | | (in millions) | | (in millions) | | | (in millions) | Cash Flow Hedges of Existing Debt | | | | | | Southern Power | $ | 677 |
| 2.95% | € | 600 |
| 1.00% | June 2022 | $ | 14 |
| Southern Power | 564 |
| 3.78% | 500 |
| 1.85% | June 2026 | 23 |
| Total | $ | 1,241 |
| | € | 1,100 |
| | | $ | 37 |
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| Fair Value of Energy-Related Derivatives and Interest Rate Derivatives |
The fair value of energy-related derivatives, interest rate derivatives, and foreign currency derivatives was reflected in the balance sheets as follows: | | | | | | | | | | | | | | | As of June 30, 2019 | As of December 31, 2018 | Derivative Category and Balance Sheet Location | Assets | Liabilities | Assets | Liabilities | | (in millions) | (in millions) | Southern Company | | | | | Derivatives designated as hedging instruments for regulatory purposes | | | | | Energy-related derivatives: | | | | | Other current assets/Other current liabilities | $ | 7 |
| $ | 57 |
| $ | 8 |
| $ | 23 |
| Other deferred charges and assets/Other deferred credits and liabilities | 9 |
| 34 |
| 9 |
| 26 |
| Assets held for sale, current/Liabilities held for sale, current | — |
| — |
| — |
| 6 |
| Total derivatives designated as hedging instruments for regulatory purposes | $ | 16 |
| $ | 91 |
| $ | 17 |
| $ | 55 |
| Derivatives designated as hedging instruments in cash flow and fair value hedges | | | | | Energy-related derivatives: | | | | | Other current assets/Other current liabilities | $ | 1 |
| $ | 7 |
| $ | 3 |
| $ | 7 |
| Other deferred charges and assets/Other deferred credits and liabilities | — |
| 1 |
| 1 |
| 2 |
| Interest rate derivatives: | | | | | Other current assets/Other current liabilities | — |
| 50 |
| — |
| 19 |
| Other deferred charges and assets/Other deferred credits and liabilities | — |
| 2 |
| — |
| 30 |
| Foreign currency derivatives: | | | | | Other current assets/Other current liabilities | — |
| 23 |
| — |
| 23 |
| Other deferred charges and assets/Other deferred credits and liabilities | 60 |
| — |
| 75 |
| — |
| Total derivatives designated as hedging instruments in cash flow and fair value hedges | $ | 61 |
| $ | 83 |
| $ | 79 |
| $ | 81 |
| Derivatives not designated as hedging instruments | | | | | Energy-related derivatives: | | | | | Other current assets/Other current liabilities | $ | 286 |
| $ | 298 |
| $ | 561 |
| $ | 575 |
| Other deferred charges and assets/Other deferred credits and liabilities | 156 |
| 219 |
| 180 |
| 325 |
| Total derivatives not designated as hedging instruments | $ | 442 |
| $ | 517 |
| $ | 741 |
| $ | 900 |
| Gross amounts recognized | $ | 519 |
| $ | 691 |
| $ | 837 |
| $ | 1,036 |
| Gross amounts offset(a) | $ | (328 | ) | $ | (506 | ) | $ | (524 | ) | $ | (801 | ) | Net amounts recognized in the Balance Sheets(b) | $ | 191 |
| $ | 185 |
| $ | 313 |
| $ | 235 |
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| | | | | | | | | | | | | | | As of June 30, 2019 | As of December 31, 2018 | Derivative Category and Balance Sheet Location | Assets | Liabilities | Assets | Liabilities | | (in millions) | (in millions) | Alabama Power | | | | | Derivatives designated as hedging instruments for regulatory purposes | | | | | Energy-related derivatives: | | | | | Other current assets/Other current liabilities | $ | 4 |
| $ | 11 |
| $ | 3 |
| $ | 4 |
| Other deferred charges and assets/Other deferred credits and liabilities | 2 |
| 7 |
| 3 |
| 6 |
| Total derivatives designated as hedging instruments for regulatory purposes | $ | 6 |
| $ | 18 |
| $ | 6 |
| $ | 10 |
| Gross amounts recognized | $ | 6 |
| $ | 18 |
| $ | 6 |
| $ | 10 |
| Gross amounts offset | $ | (3 | ) | $ | (3 | ) | $ | (4 | ) | $ | (4 | ) | Net amounts recognized in the Balance Sheets | $ | 3 |
| $ | 15 |
| $ | 2 |
| $ | 6 |
| | | | | | Georgia Power | | | | | Derivatives designated as hedging instruments for regulatory purposes | | | | | Energy-related derivatives: | | | | | Other current assets/Other current liabilities | $ | 1 |
| $ | 26 |
| $ | 2 |
| $ | 8 |
| Other deferred charges and assets/Other deferred credits and liabilities | 5 |
| 17 |
| 4 |
| 13 |
| Total derivatives designated as hedging instruments for regulatory purposes | $ | 6 |
| $ | 43 |
| $ | 6 |
| $ | 21 |
| Derivatives designated as hedging instruments in cash flow and fair value hedges | | | | | Interest rate derivatives: | | | | | Other current assets/Other current liabilities | $ | — |
| $ | 37 |
| $ | — |
| $ | 2 |
| Total derivatives designated as hedging instruments in cash flow and fair value hedges | $ | — |
| $ | 37 |
| $ | — |
| $ | 2 |
| Gross amounts recognized | $ | 6 |
| $ | 80 |
| $ | 6 |
| $ | 23 |
| Gross amounts offset | $ | (6 | ) | $ | (6 | ) | $ | (6 | ) | $ | (6 | ) | Net amounts recognized in the Balance Sheets | $ | — |
| $ | 74 |
| $ | — |
| $ | 17 |
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| | | | | | | | | | | | | | | As of June 30, 2019 | As of December 31, 2018 | Derivative Category and Balance Sheet Location | Assets | Liabilities | Assets | Liabilities | | (in millions) | (in millions) | Mississippi Power | | | | | Derivatives designated as hedging instruments for regulatory purposes | | | | | Energy-related derivatives: | | | | | Other current assets/Other current liabilities | $ | 1 |
| $ | 10 |
| $ | 1 |
| $ | 3 |
| Other deferred charges and assets/Other deferred credits and liabilities | 2 |
| 9 |
| 2 |
| 6 |
| Total derivatives designated as hedging instruments for regulatory purposes | $ | 3 |
| $ | 19 |
| $ | 3 |
| $ | 9 |
| Gross amounts recognized | $ | 3 |
| $ | 19 |
| $ | 3 |
| $ | 9 |
| Gross amounts offset | $ | (3 | ) | $ | (3 | ) | $ | (2 | ) | $ | (2 | ) | Net amounts recognized in the Balance Sheets | $ | — |
| $ | 16 |
| $ | 1 |
| $ | 7 |
| | | | | | Southern Power | | | | | Derivatives designated as hedging instruments in cash flow and fair value hedges | | | | | Energy-related derivatives: | | | | | Other current assets/Other current liabilities | $ | 1 |
| $ | 3 |
| $ | 3 |
| $ | 6 |
| Other deferred charges and assets/Other deferred credits and liabilities | — |
| 1 |
| 1 |
| 2 |
| Foreign currency derivatives: | | | | | Other current assets/Other current liabilities | — |
| 23 |
| — |
| 23 |
| Other deferred charges and assets/Other deferred credits and liabilities | 60 |
| — |
| 75 |
| — |
| Total derivatives designated as hedging instruments in cash flow and fair value hedges | $ | 61 |
| $ | 27 |
| $ | 79 |
| $ | 31 |
| Derivatives not designated as hedging instruments | | | | | Energy-related derivatives: | | | | | Other current assets/Other current liabilities | $ | 1 |
| $ | — |
| $ | — |
| $ | — |
| Total derivatives not designated as hedging instruments | $ | 1 |
| $ | — |
| $ | — |
| $ | — |
| Gross amounts recognized | $ | 62 |
| $ | 27 |
| $ | 79 |
| $ | 31 |
| Gross amounts offset | $ | (1 | ) | $ | (1 | ) | $ | (3 | ) | $ | (3 | ) | Net amounts recognized in the Balance Sheets | $ | 61 |
| $ | 26 |
| $ | 76 |
| $ | 28 |
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| | | | | | | | | | | | | | | As of June 30, 2019 | As of December 31, 2018 | Derivative Category and Balance Sheet Location | Assets | Liabilities | Assets | Liabilities | | (in millions) | (in millions) | Southern Company Gas | | | | | Derivatives designated as hedging instruments for regulatory purposes | | | | | Energy-related derivatives: | | | | | Assets from risk management activities/Liabilities from risk management activities-current | $ | 1 |
| $ | 10 |
| $ | 2 |
| $ | 8 |
| Other deferred charges and assets/Other deferred credits and liabilities | — |
| 1 |
| — |
| 1 |
| Total derivatives designated as hedging instruments for regulatory purposes | $ | 1 |
| $ | 11 |
| $ | 2 |
| $ | 9 |
| 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-current | $ | — |
| $ | 4 |
| $ | — |
| $ | 1 |
| Total derivatives designated as hedging instruments in cash flow and fair value hedges | $ | — |
| $ | 4 |
| $ | — |
| $ | 1 |
| Derivatives not designated as hedging instruments | | | | | Energy-related derivatives: | | | | | Assets from risk management activities/Liabilities from risk management activities-current | $ | 285 |
| $ | 298 |
| $ | 559 |
| $ | 574 |
| Other deferred charges and assets/Other deferred credits and liabilities | 156 |
| 219 |
| 180 |
| 325 |
| Total derivatives not designated as hedging instruments | $ | 441 |
| $ | 517 |
| $ | 739 |
| $ | 899 |
| Gross amounts of recognized | $ | 442 |
| $ | 532 |
| $ | 741 |
| $ | 909 |
| Gross amounts offset(a) | $ | (315 | ) | $ | (493 | ) | $ | (508 | ) | $ | (785 | ) | Net amounts recognized in the Balance Sheets(b) | $ | 127 |
| $ | 39 |
| $ | 233 |
| $ | 124 |
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| | (a) | Gross amounts offset include cash collateral held on deposit in broker margin accounts of $178 million and $277 million as of June 30, 2019 and December 31, 2018, respectively. |
(b) Net amounts of derivative instruments outstanding exclude premium and intrinsic value associated with weather derivatives of $8 million as of December 31, 2018.
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| Pre-tax Effects of Unrealized Derivative Gains (Losses) Arising from Energy-Related Derivative Instruments |
At June 30, 2019 and December 31, 2018, 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 at June 30, 2019 | Derivative Category and Balance Sheet Location | Southern Company(*) | Alabama Power | Georgia Power | Mississippi Power | Southern Company Gas(*) | | (in millions) | Energy-related derivatives: | | | | | | Other regulatory assets, current | $ | (48 | ) | $ | (11 | ) | $ | (25 | ) | $ | (10 | ) | $ | (2 | ) | Other regulatory assets, deferred | (23 | ) | (5 | ) | (12 | ) | (6 | ) | — |
| Other regulatory liabilities, current | 6 |
| 3 |
| — |
| — |
| 3 |
| Total energy-related derivative gains (losses) | $ | (65 | ) | $ | (13 | ) | $ | (37 | ) | $ | (16 | ) | $ | 1 |
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| | (*) | Fair value gains and losses recorded in regulatory assets and liabilities include cash collateral held on deposit in broker margin accounts of $12 million at June 30, 2019. |
| | | | | | | | | | | | | | | | | Regulatory Hedge Unrealized Gain (Loss) Recognized in the Balance Sheet at December 31, 2018 | Derivative Category and Balance Sheet Location | Southern Company | Alabama Power | Georgia Power | Mississippi Power | Southern Company Gas | | (in millions) | Energy-related derivatives: | | | | | | Other regulatory assets, current | $ | (19 | ) | $ | (3 | ) | $ | (6 | ) | $ | (2 | ) | $ | (8 | ) | Other regulatory assets, deferred | (16 | ) | (3 | ) | (9 | ) | (4 | ) | — |
| Assets held for sale, current | (6 | ) | — |
| — |
| — |
| — |
| Other regulatory liabilities, current | 1 |
| — |
| — |
| — |
| 1 |
| Total energy-related derivative gains (losses) | $ | (40 | ) | $ | (6 | ) | $ | (15 | ) | $ | (6 | ) | $ | (7 | ) |
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| Pre-tax Effects of Interest Rate Derivatives, Designated as Cash Flow Hedging Instruments |
For the three and six months ended June 30, 2019 and 2018, the pre-tax effects of cash flow hedge accounting on accumulated OCI were as follows: | | | | | | | | | | | | | | Gain (Loss) Recognized in OCI on Derivative | For the Three Months Ended June 30, | For the Six Months Ended June 30, | 2019 | 2018 | 2019 | 2018 | | (in millions) | (in millions) | Southern Company | | | | | Energy-related derivatives | $ | (6 | ) | $ | — |
| $ | (6 | ) | $ | 12 |
| Interest rate derivatives | (37 | ) | — |
| (37 | ) | (2 | ) | Foreign currency derivatives | (1 | ) | (73 | ) | (39 | ) | (21 | ) | Total | $ | (44 | ) | $ | (73 | ) | $ | (82 | ) | $ | (11 | ) | Georgia Power | | | | | Interest rate derivatives | $ | (37 | ) | $ | — |
| $ | (37 | ) | $ | — |
| Total | $ | (37 | ) | $ | — |
| $ | (37 | ) | $ | — |
| Southern Power | | | | | Energy-related derivatives | $ | (2 | ) | $ | (1 | ) | $ | (2 | ) | $ | 10 |
| Foreign currency derivatives | (1 | ) | (73 | ) | (39 | ) | (21 | ) | Total | $ | (3 | ) | $ | (74 | ) | $ | (41 | ) | $ | (11 | ) |
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| Schedule of Cash Flow Hedging Instruments, Statements of Financial Performance and Financial Position, Location |
For the three and six months ended June 30, 2019 and 2018, 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 Relationships | For the Three Months Ended June 30, | For the Six Months Ended June 30, | | | | | 2019 | 2018 | 2019 | 2018 | | | | (in millions) | (in millions) | | | Southern Company | | | | | | | Total depreciation and amortization | $ | 755 |
| $ | 783 |
| $ | 1,506 |
| $ | 1,552 |
| | | Gain (loss) on energy-related cash flow hedges(a) | (1 | ) | 1 |
| (4 | ) | 2 |
| | | Total interest expense, net of amounts capitalized | (429 | ) | (470 | ) | (859 | ) | (928 | ) | | | Gain (loss) on interest rate cash flow hedges(a) | (5 | ) | (6 | ) | (9 | ) | (11 | ) | | | Gain (loss) on foreign currency cash flow hedges(a) | (6 | ) | (7 | ) | (12 | ) | (12 | ) | | | Gain (loss) on interest rate fair value hedges(b) | 19 |
| (7 | ) | 33 |
| (31 | ) | | | Total other income (expense), net | 99 |
| 78 |
| 176 |
| 138 |
| | | Gain (loss) on foreign currency cash flow hedges(a)(c) | 16 |
| (73 | ) | (8 | ) | (37 | ) | | | Southern Power | | | | | | | Total depreciation and amortization | $ | 119 |
| $ | 125 |
| $ | 237 |
| $ | 240 |
| | | Gain (loss) on energy-related cash flow hedges(a) | (1 | ) | 1 |
| (4 | ) | 2 |
| | | Total interest expense, net of amounts capitalized | (41 | ) | (46 | ) | (84 | ) | (93 | ) | | | Gain (loss) on foreign currency cash flow hedges(a) | (6 | ) | (7 | ) | (12 | ) | (12 | ) | | | Total other income (expense), net | 40 |
| 2 |
| 41 |
| 5 |
| | | Gain (loss) on foreign currency cash flow hedges(a)(c) | 16 |
| (73 | ) | (8 | ) | (37 | ) |
| | (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.
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| Schedule of Fair Value Hedging Instruments, Statements of Financial Performance and Financial Position, Location |
As of June 30, 2019 and December 31, 2018, the following amounts were recorded on the balance sheets related to cumulative basis adjustments for fair value hedges: | | | | | | | | | | | | | | |
| Carrying Amount of the Hedged Item | | Cumulative Amount of Fair Value Hedging Adjustment included in Carrying Amount of the Hedged Item | Balance Sheet Location of Hedged Items | As of June 30, 2019 | As of December 31, 2018 |
| As of June 30, 2019 | As of December 31, 2018 |
| (in millions) | | (in millions) | Southern Company | | | | | | Securities due within one year | $ | (499 | ) | $ | (498 | ) | | $ | 1 |
| $ | 2 |
| Long-term debt | (2,087 | ) | (2,052 | ) | | 7 |
| 41 |
| | | | | | | Georgia Power | | | | | | Securities due within one year | $ | (499 | ) | $ | (498 | ) | | $ | 1 |
| $ | 2 |
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| Pre-tax Effect of Interest Rate and Energy Related Derivatives |
For the three and six months ended June 30, 2019 and 2018, 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 June 30, | | Six Months Ended June 30, | Derivatives in Non-Designated Hedging Relationships | Statements of Income Location | 2019 | 2018 | | 2019 | 2018 | | | (in millions) | | (in millions) | Southern Company | | | | | | | Energy-related derivatives: | Natural gas revenues(*) | $ | 50 |
| $ | (28 | ) | | $ | 83 |
| $ | (43 | ) | | Cost of natural gas | (5 | ) | 2 |
| | 3 |
| 4 |
| Total derivatives in non-designated hedging relationships | $ | 45 |
| $ | (26 | ) | | $ | 86 |
| $ | (39 | ) | Southern Company Gas | | | | | | | Energy-related derivatives: | Natural gas revenues(*) | $ | 50 |
| $ | (28 | ) | | $ | 83 |
| $ | (43 | ) | | Cost of natural gas | (5 | ) | 2 |
| | 3 |
| 4 |
| Total derivatives in non-designated hedging relationships | $ | 45 |
| $ | (26 | ) | | $ | 86 |
| $ | (39 | ) |
(*) Excludes immaterial gains (losses) recorded in natural gas revenues associated with weather derivatives for all periods presented.
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