RETIREMENT BENEFITS - Fair Values of Pension Plan and Other Postretirement Benefit Plan Assets (Details) - USD ($) $ in Millions | Dec. 31, 2021 | Dec. 31, 2020 |
Assets: | | |
Target Allocation | 100.00% | |
Actual Allocation | 100.00% | |
Pension plans | | |
Assets: | | |
Plan assets | $ 17,225 | $ 15,430 |
Target Allocation | | 100.00% |
Actual Allocation | | 100.00% |
Pension plans | Equity | | |
Assets: | | |
Target Allocation | 51.00% | 51.00% |
Actual Allocation | 53.00% | 56.00% |
Pension plans | Domestic equity | | |
Assets: | | |
Plan assets | $ 4,421 | $ 4,099 |
Pension plans | International equity | | |
Assets: | | |
Plan assets | $ 4,145 | $ 4,157 |
Pension plans | Fixed income | | |
Assets: | | |
Target Allocation | 23.00% | 23.00% |
Actual Allocation | 22.00% | 23.00% |
Pension plans | U.S. Treasury, government, and agency bonds | | |
Assets: | | |
Plan assets | $ 1,209 | $ 951 |
Pension plans | Mortgage- and asset-backed securities | | |
Assets: | | |
Plan assets | 10 | 9 |
Pension plans | Corporate bonds | | |
Assets: | | |
Plan assets | 1,752 | 1,673 |
Pension plans | Pooled funds | | |
Assets: | | |
Plan assets | 771 | 772 |
Pension plans | Cash equivalents and other | | |
Assets: | | |
Plan assets | 412 | 361 |
Pension plans | Real estate investments | | |
Assets: | | |
Plan assets | $ 2,744 | $ 2,138 |
Target Allocation | 14.00% | 14.00% |
Actual Allocation | 15.00% | 13.00% |
Pension plans | Special situations | | |
Assets: | | |
Plan assets | $ 171 | $ 166 |
Target Allocation | 3.00% | 3.00% |
Actual Allocation | 1.00% | 1.00% |
Pension plans | Private equity | | |
Assets: | | |
Plan assets | $ 1,590 | $ 1,104 |
Target Allocation | 9.00% | 9.00% |
Actual Allocation | 9.00% | 7.00% |
Other postretirement benefit plans | | |
Assets: | | |
Plan assets | $ 1,249 | $ 1,159 |
Target Allocation | 100.00% | 100.00% |
Actual Allocation | 100.00% | 100.00% |
Other postretirement benefit plans | Equity | | |
Assets: | | |
Target Allocation | 64.00% | 63.00% |
Actual Allocation | 66.00% | 66.00% |
Other postretirement benefit plans | Domestic equity | | |
Assets: | | |
Plan assets | $ 235 | $ 211 |
Other postretirement benefit plans | International equity | | |
Assets: | | |
Plan assets | $ 172 | $ 173 |
Other postretirement benefit plans | Fixed income | | |
Assets: | | |
Target Allocation | 27.00% | 28.00% |
Actual Allocation | 25.00% | 27.00% |
Other postretirement benefit plans | U.S. Treasury, government, and agency bonds | | |
Assets: | | |
Plan assets | $ 37 | $ 32 |
Other postretirement benefit plans | Corporate bonds | | |
Assets: | | |
Plan assets | 50 | 44 |
Other postretirement benefit plans | Pooled funds | | |
Assets: | | |
Plan assets | 90 | 86 |
Other postretirement benefit plans | Cash equivalents and other | | |
Assets: | | |
Plan assets | 14 | 15 |
Other postretirement benefit plans | Trust-owned life insurance | | |
Assets: | | |
Plan assets | 530 | 508 |
Other postretirement benefit plans | Real estate investments | | |
Assets: | | |
Plan assets | $ 74 | $ 57 |
Target Allocation | 5.00% | 5.00% |
Actual Allocation | 6.00% | 5.00% |
Other postretirement benefit plans | Special situations | | |
Assets: | | |
Plan assets | $ 5 | $ 4 |
Target Allocation | 1.00% | 1.00% |
Actual Allocation | 0.00% | 0.00% |
Other postretirement benefit plans | Private equity | | |
Assets: | | |
Plan assets | $ 42 | $ 29 |
Target Allocation | 3.00% | 3.00% |
Actual Allocation | 3.00% | 2.00% |
Quoted Prices in Active Markets for Identical Assets (Level 1) | Pension plans | | |
Assets: | | |
Plan assets | $ 6,946 | $ 6,410 |
Quoted Prices in Active Markets for Identical Assets (Level 1) | Pension plans | Domestic equity | | |
Assets: | | |
Plan assets | 3,095 | 2,852 |
Quoted Prices in Active Markets for Identical Assets (Level 1) | Pension plans | International equity | | |
Assets: | | |
Plan assets | 2,740 | 2,660 |
Quoted Prices in Active Markets for Identical Assets (Level 1) | Pension plans | U.S. Treasury, government, and agency bonds | | |
Assets: | | |
Plan assets | 0 | 0 |
Quoted Prices in Active Markets for Identical Assets (Level 1) | Pension plans | Mortgage- and asset-backed securities | | |
Assets: | | |
Plan assets | 0 | 0 |
Quoted Prices in Active Markets for Identical Assets (Level 1) | Pension plans | Corporate bonds | | |
Assets: | | |
Plan assets | 0 | 0 |
Quoted Prices in Active Markets for Identical Assets (Level 1) | Pension plans | Pooled funds | | |
Assets: | | |
Plan assets | 0 | 0 |
Quoted Prices in Active Markets for Identical Assets (Level 1) | Pension plans | Cash equivalents and other | | |
Assets: | | |
Plan assets | 405 | 356 |
Quoted Prices in Active Markets for Identical Assets (Level 1) | Pension plans | Real estate investments | | |
Assets: | | |
Plan assets | 706 | 542 |
Quoted Prices in Active Markets for Identical Assets (Level 1) | Pension plans | Special situations | | |
Assets: | | |
Plan assets | 0 | 0 |
Quoted Prices in Active Markets for Identical Assets (Level 1) | Pension plans | Private equity | | |
Assets: | | |
Plan assets | 0 | 0 |
Quoted Prices in Active Markets for Identical Assets (Level 1) | Other postretirement benefit plans | | |
Assets: | | |
Plan assets | 230 | 214 |
Quoted Prices in Active Markets for Identical Assets (Level 1) | Other postretirement benefit plans | Domestic equity | | |
Assets: | | |
Plan assets | 123 | 113 |
Quoted Prices in Active Markets for Identical Assets (Level 1) | Other postretirement benefit plans | International equity | | |
Assets: | | |
Plan assets | 73 | 71 |
Quoted Prices in Active Markets for Identical Assets (Level 1) | Other postretirement benefit plans | U.S. Treasury, government, and agency bonds | | |
Assets: | | |
Plan assets | 0 | 0 |
Quoted Prices in Active Markets for Identical Assets (Level 1) | Other postretirement benefit plans | Corporate bonds | | |
Assets: | | |
Plan assets | 0 | 0 |
Quoted Prices in Active Markets for Identical Assets (Level 1) | Other postretirement benefit plans | Pooled funds | | |
Assets: | | |
Plan assets | 0 | 0 |
Quoted Prices in Active Markets for Identical Assets (Level 1) | Other postretirement benefit plans | Cash equivalents and other | | |
Assets: | | |
Plan assets | 14 | 15 |
Quoted Prices in Active Markets for Identical Assets (Level 1) | Other postretirement benefit plans | Trust-owned life insurance | | |
Assets: | | |
Plan assets | 0 | 0 |
Quoted Prices in Active Markets for Identical Assets (Level 1) | Other postretirement benefit plans | Real estate investments | | |
Assets: | | |
Plan assets | 20 | 15 |
Quoted Prices in Active Markets for Identical Assets (Level 1) | Other postretirement benefit plans | Special situations | | |
Assets: | | |
Plan assets | 0 | 0 |
Quoted Prices in Active Markets for Identical Assets (Level 1) | Other postretirement benefit plans | Private equity | | |
Assets: | | |
Plan assets | 0 | 0 |
Significant Other Observable Inputs (Level 2) | Pension plans | | |
Assets: | | |
Plan assets | 6,477 | 6,154 |
Significant Other Observable Inputs (Level 2) | Pension plans | Domestic equity | | |
Assets: | | |
Plan assets | 1,326 | 1,247 |
Significant Other Observable Inputs (Level 2) | Pension plans | International equity | | |
Assets: | | |
Plan assets | 1,402 | 1,497 |
Significant Other Observable Inputs (Level 2) | Pension plans | U.S. Treasury, government, and agency bonds | | |
Assets: | | |
Plan assets | 1,209 | 951 |
Significant Other Observable Inputs (Level 2) | Pension plans | Mortgage- and asset-backed securities | | |
Assets: | | |
Plan assets | 10 | 9 |
Significant Other Observable Inputs (Level 2) | Pension plans | Corporate bonds | | |
Assets: | | |
Plan assets | 1,752 | 1,673 |
Significant Other Observable Inputs (Level 2) | Pension plans | Pooled funds | | |
Assets: | | |
Plan assets | 771 | 772 |
Significant Other Observable Inputs (Level 2) | Pension plans | Cash equivalents and other | | |
Assets: | | |
Plan assets | 7 | 5 |
Significant Other Observable Inputs (Level 2) | Pension plans | Real estate investments | | |
Assets: | | |
Plan assets | 0 | 0 |
Significant Other Observable Inputs (Level 2) | Pension plans | Special situations | | |
Assets: | | |
Plan assets | 0 | 0 |
Significant Other Observable Inputs (Level 2) | Pension plans | Private equity | | |
Assets: | | |
Plan assets | 0 | 0 |
Significant Other Observable Inputs (Level 2) | Other postretirement benefit plans | | |
Assets: | | |
Plan assets | 918 | 870 |
Significant Other Observable Inputs (Level 2) | Other postretirement benefit plans | Domestic equity | | |
Assets: | | |
Plan assets | 112 | 98 |
Significant Other Observable Inputs (Level 2) | Other postretirement benefit plans | International equity | | |
Assets: | | |
Plan assets | 99 | 102 |
Significant Other Observable Inputs (Level 2) | Other postretirement benefit plans | U.S. Treasury, government, and agency bonds | | |
Assets: | | |
Plan assets | 37 | 32 |
Significant Other Observable Inputs (Level 2) | Other postretirement benefit plans | Corporate bonds | | |
Assets: | | |
Plan assets | 50 | 44 |
Significant Other Observable Inputs (Level 2) | Other postretirement benefit plans | Pooled funds | | |
Assets: | | |
Plan assets | 90 | 86 |
Significant Other Observable Inputs (Level 2) | Other postretirement benefit plans | Cash equivalents and other | | |
Assets: | | |
Plan assets | 0 | 0 |
Significant Other Observable Inputs (Level 2) | Other postretirement benefit plans | Trust-owned life insurance | | |
Assets: | | |
Plan assets | 530 | 508 |
Significant Other Observable Inputs (Level 2) | Other postretirement benefit plans | Real estate investments | | |
Assets: | | |
Plan assets | 0 | 0 |
Significant Other Observable Inputs (Level 2) | Other postretirement benefit plans | Special situations | | |
Assets: | | |
Plan assets | 0 | 0 |
Significant Other Observable Inputs (Level 2) | Other postretirement benefit plans | Private equity | | |
Assets: | | |
Plan assets | 0 | 0 |
Significant Unobservable Inputs (Level 3) | Pension plans | | |
Assets: | | |
Plan assets | 3 | |
Significant Unobservable Inputs (Level 3) | Pension plans | Domestic equity | | |
Assets: | | |
Plan assets | 0 | |
Significant Unobservable Inputs (Level 3) | Pension plans | International equity | | |
Assets: | | |
Plan assets | 3 | |
Significant Unobservable Inputs (Level 3) | Pension plans | U.S. Treasury, government, and agency bonds | | |
Assets: | | |
Plan assets | 0 | |
Significant Unobservable Inputs (Level 3) | Pension plans | Mortgage- and asset-backed securities | | |
Assets: | | |
Plan assets | 0 | |
Significant Unobservable Inputs (Level 3) | Pension plans | Corporate bonds | | |
Assets: | | |
Plan assets | 0 | |
Significant Unobservable Inputs (Level 3) | Pension plans | Pooled funds | | |
Assets: | | |
Plan assets | 0 | |
Significant Unobservable Inputs (Level 3) | Pension plans | Cash equivalents and other | | |
Assets: | | |
Plan assets | 0 | |
Significant Unobservable Inputs (Level 3) | Pension plans | Real estate investments | | |
Assets: | | |
Plan assets | 0 | |
Significant Unobservable Inputs (Level 3) | Pension plans | Special situations | | |
Assets: | | |
Plan assets | 0 | |
Significant Unobservable Inputs (Level 3) | Pension plans | Private equity | | |
Assets: | | |
Plan assets | 0 | |
Net Asset Value as a Practical Expedient (NAV) | Pension plans | | |
Assets: | | |
Plan assets | 3,799 | 2,866 |
Net Asset Value as a Practical Expedient (NAV) | Pension plans | Domestic equity | | |
Assets: | | |
Plan assets | 0 | 0 |
Net Asset Value as a Practical Expedient (NAV) | Pension plans | International equity | | |
Assets: | | |
Plan assets | 0 | 0 |
Net Asset Value as a Practical Expedient (NAV) | Pension plans | U.S. Treasury, government, and agency bonds | | |
Assets: | | |
Plan assets | 0 | 0 |
Net Asset Value as a Practical Expedient (NAV) | Pension plans | Mortgage- and asset-backed securities | | |
Assets: | | |
Plan assets | 0 | 0 |
Net Asset Value as a Practical Expedient (NAV) | Pension plans | Corporate bonds | | |
Assets: | | |
Plan assets | 0 | 0 |
Net Asset Value as a Practical Expedient (NAV) | Pension plans | Pooled funds | | |
Assets: | | |
Plan assets | 0 | 0 |
Net Asset Value as a Practical Expedient (NAV) | Pension plans | Cash equivalents and other | | |
Assets: | | |
Plan assets | 0 | 0 |
Net Asset Value as a Practical Expedient (NAV) | Pension plans | Real estate investments | | |
Assets: | | |
Plan assets | 2,038 | 1,596 |
Net Asset Value as a Practical Expedient (NAV) | Pension plans | Special situations | | |
Assets: | | |
Plan assets | 171 | 166 |
Net Asset Value as a Practical Expedient (NAV) | Pension plans | Private equity | | |
Assets: | | |
Plan assets | 1,590 | 1,104 |
Net Asset Value as a Practical Expedient (NAV) | Other postretirement benefit plans | | |
Assets: | | |
Plan assets | 101 | 75 |
Net Asset Value as a Practical Expedient (NAV) | Other postretirement benefit plans | Domestic equity | | |
Assets: | | |
Plan assets | 0 | 0 |
Net Asset Value as a Practical Expedient (NAV) | Other postretirement benefit plans | International equity | | |
Assets: | | |
Plan assets | 0 | 0 |
Net Asset Value as a Practical Expedient (NAV) | Other postretirement benefit plans | U.S. Treasury, government, and agency bonds | | |
Assets: | | |
Plan assets | 0 | 0 |
Net Asset Value as a Practical Expedient (NAV) | Other postretirement benefit plans | Corporate bonds | | |
Assets: | | |
Plan assets | 0 | 0 |
Net Asset Value as a Practical Expedient (NAV) | Other postretirement benefit plans | Pooled funds | | |
Assets: | | |
Plan assets | 0 | 0 |
Net Asset Value as a Practical Expedient (NAV) | Other postretirement benefit plans | Cash equivalents and other | | |
Assets: | | |
Plan assets | 0 | 0 |
Net Asset Value as a Practical Expedient (NAV) | Other postretirement benefit plans | Trust-owned life insurance | | |
Assets: | | |
Plan assets | 0 | 0 |
Net Asset Value as a Practical Expedient (NAV) | Other postretirement benefit plans | Real estate investments | | |
Assets: | | |
Plan assets | 54 | 42 |
Net Asset Value as a Practical Expedient (NAV) | Other postretirement benefit plans | Special situations | | |
Assets: | | |
Plan assets | 5 | 4 |
Net Asset Value as a Practical Expedient (NAV) | Other postretirement benefit plans | Private equity | | |
Assets: | | |
Plan assets | 42 | 29 |
Alabama Power | Pension plans | | |
Assets: | | |
Plan assets | $ 4,141 | $ 3,699 |
Target Allocation | 100.00% | 100.00% |
Actual Allocation | 100.00% | 100.00% |
Alabama Power | Pension plans | Equity | | |
Assets: | | |
Target Allocation | 51.00% | 51.00% |
Actual Allocation | 53.00% | 56.00% |
Alabama Power | Pension plans | Domestic equity | | |
Assets: | | |
Plan assets | $ 1,062 | $ 984 |
Alabama Power | Pension plans | International equity | | |
Assets: | | |
Plan assets | $ 997 | $ 997 |
Alabama Power | Pension plans | Fixed income | | |
Assets: | | |
Target Allocation | 23.00% | 23.00% |
Actual Allocation | 22.00% | 23.00% |
Alabama Power | Pension plans | U.S. Treasury, government, and agency bonds | | |
Assets: | | |
Plan assets | $ 291 | $ 228 |
Alabama Power | Pension plans | Mortgage- and asset-backed securities | | |
Assets: | | |
Plan assets | 2 | 2 |
Alabama Power | Pension plans | Corporate bonds | | |
Assets: | | |
Plan assets | 421 | 401 |
Alabama Power | Pension plans | Pooled funds | | |
Assets: | | |
Plan assets | 186 | 185 |
Alabama Power | Pension plans | Cash equivalents and other | | |
Assets: | | |
Plan assets | 99 | 86 |
Alabama Power | Pension plans | Real estate investments | | |
Assets: | | |
Plan assets | $ 660 | $ 512 |
Target Allocation | 14.00% | 14.00% |
Actual Allocation | 15.00% | 13.00% |
Alabama Power | Pension plans | Special situations | | |
Assets: | | |
Plan assets | $ 41 | $ 40 |
Target Allocation | 3.00% | 3.00% |
Actual Allocation | 1.00% | 1.00% |
Alabama Power | Pension plans | Private equity | | |
Assets: | | |
Plan assets | $ 382 | $ 264 |
Target Allocation | 9.00% | 9.00% |
Actual Allocation | 9.00% | 7.00% |
Alabama Power | Other postretirement benefit plans | | |
Assets: | | |
Plan assets | $ 488 | $ 459 |
Target Allocation | 100.00% | 100.00% |
Actual Allocation | 100.00% | 100.00% |
Alabama Power | Other postretirement benefit plans | Equity | | |
Assets: | | |
Target Allocation | 71.00% | 68.00% |
Actual Allocation | 69.00% | 69.00% |
Alabama Power | Other postretirement benefit plans | Domestic equity | | |
Assets: | | |
Plan assets | $ 37 | $ 37 |
Alabama Power | Other postretirement benefit plans | International equity | | |
Assets: | | |
Plan assets | $ 35 | $ 36 |
Alabama Power | Other postretirement benefit plans | Fixed income | | |
Assets: | | |
Target Allocation | 21.00% | 24.00% |
Actual Allocation | 21.00% | 25.00% |
Alabama Power | Other postretirement benefit plans | U.S. Treasury, government, and agency bonds | | |
Assets: | | |
Plan assets | $ 10 | $ 11 |
Alabama Power | Other postretirement benefit plans | Corporate bonds | | |
Assets: | | |
Plan assets | 18 | 14 |
Alabama Power | Other postretirement benefit plans | Pooled funds | | |
Assets: | | |
Plan assets | 6 | 7 |
Alabama Power | Other postretirement benefit plans | Cash equivalents and other | | |
Assets: | | |
Plan assets | 3 | 5 |
Alabama Power | Other postretirement benefit plans | Trust-owned life insurance | | |
Assets: | | |
Plan assets | 341 | 321 |
Alabama Power | Other postretirement benefit plans | Real estate investments | | |
Assets: | | |
Plan assets | $ 23 | $ 18 |
Target Allocation | 4.00% | 4.00% |
Actual Allocation | 7.00% | 4.00% |
Alabama Power | Other postretirement benefit plans | Special situations | | |
Assets: | | |
Plan assets | $ 2 | $ 1 |
Target Allocation | 1.00% | 1.00% |
Actual Allocation | 0.00% | 0.00% |
Alabama Power | Other postretirement benefit plans | Private equity | | |
Assets: | | |
Plan assets | $ 13 | $ 9 |
Target Allocation | 3.00% | 3.00% |
Actual Allocation | 3.00% | 2.00% |
Alabama Power | Quoted Prices in Active Markets for Identical Assets (Level 1) | Pension plans | | |
Assets: | | |
Plan assets | $ 1,669 | $ 1,538 |
Alabama Power | Quoted Prices in Active Markets for Identical Assets (Level 1) | Pension plans | Domestic equity | | |
Assets: | | |
Plan assets | 743 | 685 |
Alabama Power | Quoted Prices in Active Markets for Identical Assets (Level 1) | Pension plans | International equity | | |
Assets: | | |
Plan assets | 659 | 638 |
Alabama Power | Quoted Prices in Active Markets for Identical Assets (Level 1) | Pension plans | U.S. Treasury, government, and agency bonds | | |
Assets: | | |
Plan assets | 0 | 0 |
Alabama Power | Quoted Prices in Active Markets for Identical Assets (Level 1) | Pension plans | Mortgage- and asset-backed securities | | |
Assets: | | |
Plan assets | 0 | 0 |
Alabama Power | Quoted Prices in Active Markets for Identical Assets (Level 1) | Pension plans | Corporate bonds | | |
Assets: | | |
Plan assets | 0 | 0 |
Alabama Power | Quoted Prices in Active Markets for Identical Assets (Level 1) | Pension plans | Pooled funds | | |
Assets: | | |
Plan assets | 0 | 0 |
Alabama Power | Quoted Prices in Active Markets for Identical Assets (Level 1) | Pension plans | Cash equivalents and other | | |
Assets: | | |
Plan assets | 97 | 85 |
Alabama Power | Quoted Prices in Active Markets for Identical Assets (Level 1) | Pension plans | Real estate investments | | |
Assets: | | |
Plan assets | 170 | 130 |
Alabama Power | Quoted Prices in Active Markets for Identical Assets (Level 1) | Pension plans | Special situations | | |
Assets: | | |
Plan assets | 0 | 0 |
Alabama Power | Quoted Prices in Active Markets for Identical Assets (Level 1) | Pension plans | Private equity | | |
Assets: | | |
Plan assets | 0 | 0 |
Alabama Power | Quoted Prices in Active Markets for Identical Assets (Level 1) | Other postretirement benefit plans | | |
Assets: | | |
Plan assets | 58 | 59 |
Alabama Power | Quoted Prices in Active Markets for Identical Assets (Level 1) | Other postretirement benefit plans | Domestic equity | | |
Assets: | | |
Plan assets | 26 | 26 |
Alabama Power | Quoted Prices in Active Markets for Identical Assets (Level 1) | Other postretirement benefit plans | International equity | | |
Assets: | | |
Plan assets | 23 | 23 |
Alabama Power | Quoted Prices in Active Markets for Identical Assets (Level 1) | Other postretirement benefit plans | U.S. Treasury, government, and agency bonds | | |
Assets: | | |
Plan assets | 0 | 0 |
Alabama Power | Quoted Prices in Active Markets for Identical Assets (Level 1) | Other postretirement benefit plans | Corporate bonds | | |
Assets: | | |
Plan assets | 0 | 0 |
Alabama Power | Quoted Prices in Active Markets for Identical Assets (Level 1) | Other postretirement benefit plans | Pooled funds | | |
Assets: | | |
Plan assets | 0 | 0 |
Alabama Power | Quoted Prices in Active Markets for Identical Assets (Level 1) | Other postretirement benefit plans | Cash equivalents and other | | |
Assets: | | |
Plan assets | 3 | 5 |
Alabama Power | Quoted Prices in Active Markets for Identical Assets (Level 1) | Other postretirement benefit plans | Trust-owned life insurance | | |
Assets: | | |
Plan assets | 0 | 0 |
Alabama Power | Quoted Prices in Active Markets for Identical Assets (Level 1) | Other postretirement benefit plans | Real estate investments | | |
Assets: | | |
Plan assets | 6 | 5 |
Alabama Power | Quoted Prices in Active Markets for Identical Assets (Level 1) | Other postretirement benefit plans | Special situations | | |
Assets: | | |
Plan assets | 0 | 0 |
Alabama Power | Quoted Prices in Active Markets for Identical Assets (Level 1) | Other postretirement benefit plans | Private equity | | |
Assets: | | |
Plan assets | 0 | 0 |
Alabama Power | Significant Other Observable Inputs (Level 2) | Pension plans | | |
Assets: | | |
Plan assets | 1,558 | 1,475 |
Alabama Power | Significant Other Observable Inputs (Level 2) | Pension plans | Domestic equity | | |
Assets: | | |
Plan assets | 319 | 299 |
Alabama Power | Significant Other Observable Inputs (Level 2) | Pension plans | International equity | | |
Assets: | | |
Plan assets | 337 | 359 |
Alabama Power | Significant Other Observable Inputs (Level 2) | Pension plans | U.S. Treasury, government, and agency bonds | | |
Assets: | | |
Plan assets | 291 | 228 |
Alabama Power | Significant Other Observable Inputs (Level 2) | Pension plans | Mortgage- and asset-backed securities | | |
Assets: | | |
Plan assets | 2 | 2 |
Alabama Power | Significant Other Observable Inputs (Level 2) | Pension plans | Corporate bonds | | |
Assets: | | |
Plan assets | 421 | 401 |
Alabama Power | Significant Other Observable Inputs (Level 2) | Pension plans | Pooled funds | | |
Assets: | | |
Plan assets | 186 | 185 |
Alabama Power | Significant Other Observable Inputs (Level 2) | Pension plans | Cash equivalents and other | | |
Assets: | | |
Plan assets | 2 | 1 |
Alabama Power | Significant Other Observable Inputs (Level 2) | Pension plans | Real estate investments | | |
Assets: | | |
Plan assets | 0 | 0 |
Alabama Power | Significant Other Observable Inputs (Level 2) | Pension plans | Special situations | | |
Assets: | | |
Plan assets | 0 | 0 |
Alabama Power | Significant Other Observable Inputs (Level 2) | Pension plans | Private equity | | |
Assets: | | |
Plan assets | 0 | 0 |
Alabama Power | Significant Other Observable Inputs (Level 2) | Other postretirement benefit plans | | |
Assets: | | |
Plan assets | 398 | 377 |
Alabama Power | Significant Other Observable Inputs (Level 2) | Other postretirement benefit plans | Domestic equity | | |
Assets: | | |
Plan assets | 11 | 11 |
Alabama Power | Significant Other Observable Inputs (Level 2) | Other postretirement benefit plans | International equity | | |
Assets: | | |
Plan assets | 12 | 13 |
Alabama Power | Significant Other Observable Inputs (Level 2) | Other postretirement benefit plans | U.S. Treasury, government, and agency bonds | | |
Assets: | | |
Plan assets | 10 | 11 |
Alabama Power | Significant Other Observable Inputs (Level 2) | Other postretirement benefit plans | Corporate bonds | | |
Assets: | | |
Plan assets | 18 | 14 |
Alabama Power | Significant Other Observable Inputs (Level 2) | Other postretirement benefit plans | Pooled funds | | |
Assets: | | |
Plan assets | 6 | 7 |
Alabama Power | Significant Other Observable Inputs (Level 2) | Other postretirement benefit plans | Cash equivalents and other | | |
Assets: | | |
Plan assets | 0 | 0 |
Alabama Power | Significant Other Observable Inputs (Level 2) | Other postretirement benefit plans | Trust-owned life insurance | | |
Assets: | | |
Plan assets | 341 | 321 |
Alabama Power | Significant Other Observable Inputs (Level 2) | Other postretirement benefit plans | Real estate investments | | |
Assets: | | |
Plan assets | 0 | 0 |
Alabama Power | Significant Other Observable Inputs (Level 2) | Other postretirement benefit plans | Special situations | | |
Assets: | | |
Plan assets | 0 | 0 |
Alabama Power | Significant Other Observable Inputs (Level 2) | Other postretirement benefit plans | Private equity | | |
Assets: | | |
Plan assets | 0 | 0 |
Alabama Power | Significant Unobservable Inputs (Level 3) | Pension plans | | |
Assets: | | |
Plan assets | 1 | |
Alabama Power | Significant Unobservable Inputs (Level 3) | Pension plans | Domestic equity | | |
Assets: | | |
Plan assets | 0 | |
Alabama Power | Significant Unobservable Inputs (Level 3) | Pension plans | International equity | | |
Assets: | | |
Plan assets | 1 | |
Alabama Power | Significant Unobservable Inputs (Level 3) | Pension plans | U.S. Treasury, government, and agency bonds | | |
Assets: | | |
Plan assets | 0 | |
Alabama Power | Significant Unobservable Inputs (Level 3) | Pension plans | Mortgage- and asset-backed securities | | |
Assets: | | |
Plan assets | 0 | |
Alabama Power | Significant Unobservable Inputs (Level 3) | Pension plans | Corporate bonds | | |
Assets: | | |
Plan assets | 0 | |
Alabama Power | Significant Unobservable Inputs (Level 3) | Pension plans | Pooled funds | | |
Assets: | | |
Plan assets | 0 | |
Alabama Power | Significant Unobservable Inputs (Level 3) | Pension plans | Cash equivalents and other | | |
Assets: | | |
Plan assets | 0 | |
Alabama Power | Significant Unobservable Inputs (Level 3) | Pension plans | Real estate investments | | |
Assets: | | |
Plan assets | 0 | |
Alabama Power | Significant Unobservable Inputs (Level 3) | Pension plans | Special situations | | |
Assets: | | |
Plan assets | 0 | |
Alabama Power | Significant Unobservable Inputs (Level 3) | Pension plans | Private equity | | |
Assets: | | |
Plan assets | 0 | |
Alabama Power | Net Asset Value as a Practical Expedient (NAV) | Pension plans | | |
Assets: | | |
Plan assets | 913 | 686 |
Alabama Power | Net Asset Value as a Practical Expedient (NAV) | Pension plans | Domestic equity | | |
Assets: | | |
Plan assets | 0 | 0 |
Alabama Power | Net Asset Value as a Practical Expedient (NAV) | Pension plans | International equity | | |
Assets: | | |
Plan assets | 0 | 0 |
Alabama Power | Net Asset Value as a Practical Expedient (NAV) | Pension plans | U.S. Treasury, government, and agency bonds | | |
Assets: | | |
Plan assets | 0 | 0 |
Alabama Power | Net Asset Value as a Practical Expedient (NAV) | Pension plans | Mortgage- and asset-backed securities | | |
Assets: | | |
Plan assets | 0 | 0 |
Alabama Power | Net Asset Value as a Practical Expedient (NAV) | Pension plans | Corporate bonds | | |
Assets: | | |
Plan assets | 0 | 0 |
Alabama Power | Net Asset Value as a Practical Expedient (NAV) | Pension plans | Pooled funds | | |
Assets: | | |
Plan assets | 0 | 0 |
Alabama Power | Net Asset Value as a Practical Expedient (NAV) | Pension plans | Cash equivalents and other | | |
Assets: | | |
Plan assets | 0 | 0 |
Alabama Power | Net Asset Value as a Practical Expedient (NAV) | Pension plans | Real estate investments | | |
Assets: | | |
Plan assets | 490 | 382 |
Alabama Power | Net Asset Value as a Practical Expedient (NAV) | Pension plans | Special situations | | |
Assets: | | |
Plan assets | 41 | 40 |
Alabama Power | Net Asset Value as a Practical Expedient (NAV) | Pension plans | Private equity | | |
Assets: | | |
Plan assets | 382 | 264 |
Alabama Power | Net Asset Value as a Practical Expedient (NAV) | Other postretirement benefit plans | | |
Assets: | | |
Plan assets | 32 | 23 |
Alabama Power | Net Asset Value as a Practical Expedient (NAV) | Other postretirement benefit plans | Domestic equity | | |
Assets: | | |
Plan assets | 0 | 0 |
Alabama Power | Net Asset Value as a Practical Expedient (NAV) | Other postretirement benefit plans | International equity | | |
Assets: | | |
Plan assets | 0 | 0 |
Alabama Power | Net Asset Value as a Practical Expedient (NAV) | Other postretirement benefit plans | U.S. Treasury, government, and agency bonds | | |
Assets: | | |
Plan assets | 0 | 0 |
Alabama Power | Net Asset Value as a Practical Expedient (NAV) | Other postretirement benefit plans | Corporate bonds | | |
Assets: | | |
Plan assets | 0 | 0 |
Alabama Power | Net Asset Value as a Practical Expedient (NAV) | Other postretirement benefit plans | Pooled funds | | |
Assets: | | |
Plan assets | 0 | 0 |
Alabama Power | Net Asset Value as a Practical Expedient (NAV) | Other postretirement benefit plans | Cash equivalents and other | | |
Assets: | | |
Plan assets | 0 | 0 |
Alabama Power | Net Asset Value as a Practical Expedient (NAV) | Other postretirement benefit plans | Trust-owned life insurance | | |
Assets: | | |
Plan assets | 0 | 0 |
Alabama Power | Net Asset Value as a Practical Expedient (NAV) | Other postretirement benefit plans | Real estate investments | | |
Assets: | | |
Plan assets | 17 | 13 |
Alabama Power | Net Asset Value as a Practical Expedient (NAV) | Other postretirement benefit plans | Special situations | | |
Assets: | | |
Plan assets | 2 | 1 |
Alabama Power | Net Asset Value as a Practical Expedient (NAV) | Other postretirement benefit plans | Private equity | | |
Assets: | | |
Plan assets | 13 | 9 |
Georgia Power | Pension plans | | |
Assets: | | |
Plan assets | $ 5,415 | $ 4,864 |
Target Allocation | 100.00% | 100.00% |
Actual Allocation | 100.00% | 100.00% |
Georgia Power | Pension plans | Equity | | |
Assets: | | |
Target Allocation | 51.00% | 51.00% |
Actual Allocation | 53.00% | 56.00% |
Georgia Power | Pension plans | Domestic equity | | |
Assets: | | |
Plan assets | $ 1,389 | $ 1,292 |
Georgia Power | Pension plans | International equity | | |
Assets: | | |
Plan assets | $ 1,303 | $ 1,311 |
Georgia Power | Pension plans | Fixed income | | |
Assets: | | |
Target Allocation | 23.00% | 23.00% |
Actual Allocation | 22.00% | 23.00% |
Georgia Power | Pension plans | U.S. Treasury, government, and agency bonds | | |
Assets: | | |
Plan assets | $ 380 | $ 300 |
Georgia Power | Pension plans | Mortgage- and asset-backed securities | | |
Assets: | | |
Plan assets | 3 | 3 |
Georgia Power | Pension plans | Corporate bonds | | |
Assets: | | |
Plan assets | 551 | 527 |
Georgia Power | Pension plans | Pooled funds | | |
Assets: | | |
Plan assets | 243 | 243 |
Georgia Power | Pension plans | Cash equivalents and other | | |
Assets: | | |
Plan assets | 129 | 113 |
Georgia Power | Pension plans | Real estate investments | | |
Assets: | | |
Plan assets | $ 863 | $ 674 |
Target Allocation | 14.00% | 14.00% |
Actual Allocation | 15.00% | 13.00% |
Georgia Power | Pension plans | Special situations | | |
Assets: | | |
Plan assets | $ 54 | $ 53 |
Target Allocation | 3.00% | 3.00% |
Actual Allocation | 1.00% | 1.00% |
Georgia Power | Pension plans | Private equity | | |
Assets: | | |
Plan assets | $ 500 | $ 348 |
Target Allocation | 9.00% | 9.00% |
Actual Allocation | 9.00% | 7.00% |
Georgia Power | Other postretirement benefit plans | | |
Assets: | | |
Plan assets | $ 450 | $ 427 |
Target Allocation | 100.00% | 100.00% |
Actual Allocation | 100.00% | 100.00% |
Georgia Power | Other postretirement benefit plans | Equity | | |
Assets: | | |
Target Allocation | 60.00% | 60.00% |
Actual Allocation | 62.00% | 64.00% |
Georgia Power | Other postretirement benefit plans | Domestic equity | | |
Assets: | | |
Plan assets | $ 78 | $ 68 |
Georgia Power | Other postretirement benefit plans | International equity | | |
Assets: | | |
Plan assets | $ 72 | $ 71 |
Georgia Power | Other postretirement benefit plans | Fixed income | | |
Assets: | | |
Target Allocation | 33.00% | 33.00% |
Actual Allocation | 30.00% | 30.00% |
Georgia Power | Other postretirement benefit plans | U.S. Treasury, government, and agency bonds | | |
Assets: | | |
Plan assets | $ 9 | $ 8 |
Georgia Power | Other postretirement benefit plans | Corporate bonds | | |
Assets: | | |
Plan assets | 14 | 13 |
Georgia Power | Other postretirement benefit plans | Pooled funds | | |
Assets: | | |
Plan assets | 46 | 46 |
Georgia Power | Other postretirement benefit plans | Cash equivalents and other | | |
Assets: | | |
Plan assets | 5 | 5 |
Georgia Power | Other postretirement benefit plans | Trust-owned life insurance | | |
Assets: | | |
Plan assets | 189 | 188 |
Georgia Power | Other postretirement benefit plans | Real estate investments | | |
Assets: | | |
Plan assets | $ 23 | $ 18 |
Target Allocation | 4.00% | 4.00% |
Actual Allocation | 5.00% | 4.00% |
Georgia Power | Other postretirement benefit plans | Special situations | | |
Assets: | | |
Plan assets | $ 1 | $ 1 |
Target Allocation | 1.00% | 1.00% |
Actual Allocation | 0.00% | 0.00% |
Georgia Power | Other postretirement benefit plans | Private equity | | |
Assets: | | |
Plan assets | $ 13 | $ 9 |
Target Allocation | 2.00% | 2.00% |
Actual Allocation | 3.00% | 2.00% |
Georgia Power | Quoted Prices in Active Markets for Identical Assets (Level 1) | Pension plans | | |
Assets: | | |
Plan assets | $ 2,182 | $ 2,021 |
Georgia Power | Quoted Prices in Active Markets for Identical Assets (Level 1) | Pension plans | Domestic equity | | |
Assets: | | |
Plan assets | 972 | 899 |
Georgia Power | Quoted Prices in Active Markets for Identical Assets (Level 1) | Pension plans | International equity | | |
Assets: | | |
Plan assets | 861 | 839 |
Georgia Power | Quoted Prices in Active Markets for Identical Assets (Level 1) | Pension plans | U.S. Treasury, government, and agency bonds | | |
Assets: | | |
Plan assets | 0 | 0 |
Georgia Power | Quoted Prices in Active Markets for Identical Assets (Level 1) | Pension plans | Mortgage- and asset-backed securities | | |
Assets: | | |
Plan assets | 0 | 0 |
Georgia Power | Quoted Prices in Active Markets for Identical Assets (Level 1) | Pension plans | Corporate bonds | | |
Assets: | | |
Plan assets | 0 | 0 |
Georgia Power | Quoted Prices in Active Markets for Identical Assets (Level 1) | Pension plans | Pooled funds | | |
Assets: | | |
Plan assets | 0 | 0 |
Georgia Power | Quoted Prices in Active Markets for Identical Assets (Level 1) | Pension plans | Cash equivalents and other | | |
Assets: | | |
Plan assets | 127 | 112 |
Georgia Power | Quoted Prices in Active Markets for Identical Assets (Level 1) | Pension plans | Real estate investments | | |
Assets: | | |
Plan assets | 222 | 171 |
Georgia Power | Quoted Prices in Active Markets for Identical Assets (Level 1) | Pension plans | Special situations | | |
Assets: | | |
Plan assets | 0 | 0 |
Georgia Power | Quoted Prices in Active Markets for Identical Assets (Level 1) | Pension plans | Private equity | | |
Assets: | | |
Plan assets | 0 | 0 |
Georgia Power | Quoted Prices in Active Markets for Identical Assets (Level 1) | Other postretirement benefit plans | | |
Assets: | | |
Plan assets | 99 | 89 |
Georgia Power | Quoted Prices in Active Markets for Identical Assets (Level 1) | Other postretirement benefit plans | Domestic equity | | |
Assets: | | |
Plan assets | 65 | 58 |
Georgia Power | Quoted Prices in Active Markets for Identical Assets (Level 1) | Other postretirement benefit plans | International equity | | |
Assets: | | |
Plan assets | 22 | 21 |
Georgia Power | Quoted Prices in Active Markets for Identical Assets (Level 1) | Other postretirement benefit plans | U.S. Treasury, government, and agency bonds | | |
Assets: | | |
Plan assets | 0 | 0 |
Georgia Power | Quoted Prices in Active Markets for Identical Assets (Level 1) | Other postretirement benefit plans | Corporate bonds | | |
Assets: | | |
Plan assets | 0 | 0 |
Georgia Power | Quoted Prices in Active Markets for Identical Assets (Level 1) | Other postretirement benefit plans | Pooled funds | | |
Assets: | | |
Plan assets | 0 | 0 |
Georgia Power | Quoted Prices in Active Markets for Identical Assets (Level 1) | Other postretirement benefit plans | Cash equivalents and other | | |
Assets: | | |
Plan assets | 5 | 5 |
Georgia Power | Quoted Prices in Active Markets for Identical Assets (Level 1) | Other postretirement benefit plans | Trust-owned life insurance | | |
Assets: | | |
Plan assets | 0 | 0 |
Georgia Power | Quoted Prices in Active Markets for Identical Assets (Level 1) | Other postretirement benefit plans | Real estate investments | | |
Assets: | | |
Plan assets | 7 | 5 |
Georgia Power | Quoted Prices in Active Markets for Identical Assets (Level 1) | Other postretirement benefit plans | Special situations | | |
Assets: | | |
Plan assets | 0 | 0 |
Georgia Power | Quoted Prices in Active Markets for Identical Assets (Level 1) | Other postretirement benefit plans | Private equity | | |
Assets: | | |
Plan assets | 0 | 0 |
Georgia Power | Significant Other Observable Inputs (Level 2) | Pension plans | | |
Assets: | | |
Plan assets | 2,037 | 1,939 |
Georgia Power | Significant Other Observable Inputs (Level 2) | Pension plans | Domestic equity | | |
Assets: | | |
Plan assets | 417 | 393 |
Georgia Power | Significant Other Observable Inputs (Level 2) | Pension plans | International equity | | |
Assets: | | |
Plan assets | 441 | 472 |
Georgia Power | Significant Other Observable Inputs (Level 2) | Pension plans | U.S. Treasury, government, and agency bonds | | |
Assets: | | |
Plan assets | 380 | 300 |
Georgia Power | Significant Other Observable Inputs (Level 2) | Pension plans | Mortgage- and asset-backed securities | | |
Assets: | | |
Plan assets | 3 | 3 |
Georgia Power | Significant Other Observable Inputs (Level 2) | Pension plans | Corporate bonds | | |
Assets: | | |
Plan assets | 551 | 527 |
Georgia Power | Significant Other Observable Inputs (Level 2) | Pension plans | Pooled funds | | |
Assets: | | |
Plan assets | 243 | 243 |
Georgia Power | Significant Other Observable Inputs (Level 2) | Pension plans | Cash equivalents and other | | |
Assets: | | |
Plan assets | 2 | 1 |
Georgia Power | Significant Other Observable Inputs (Level 2) | Pension plans | Real estate investments | | |
Assets: | | |
Plan assets | 0 | 0 |
Georgia Power | Significant Other Observable Inputs (Level 2) | Pension plans | Special situations | | |
Assets: | | |
Plan assets | 0 | 0 |
Georgia Power | Significant Other Observable Inputs (Level 2) | Pension plans | Private equity | | |
Assets: | | |
Plan assets | 0 | 0 |
Georgia Power | Significant Other Observable Inputs (Level 2) | Other postretirement benefit plans | | |
Assets: | | |
Plan assets | 321 | 315 |
Georgia Power | Significant Other Observable Inputs (Level 2) | Other postretirement benefit plans | Domestic equity | | |
Assets: | | |
Plan assets | 13 | 10 |
Georgia Power | Significant Other Observable Inputs (Level 2) | Other postretirement benefit plans | International equity | | |
Assets: | | |
Plan assets | 50 | 50 |
Georgia Power | Significant Other Observable Inputs (Level 2) | Other postretirement benefit plans | U.S. Treasury, government, and agency bonds | | |
Assets: | | |
Plan assets | 9 | 8 |
Georgia Power | Significant Other Observable Inputs (Level 2) | Other postretirement benefit plans | Corporate bonds | | |
Assets: | | |
Plan assets | 14 | 13 |
Georgia Power | Significant Other Observable Inputs (Level 2) | Other postretirement benefit plans | Pooled funds | | |
Assets: | | |
Plan assets | 46 | 46 |
Georgia Power | Significant Other Observable Inputs (Level 2) | Other postretirement benefit plans | Cash equivalents and other | | |
Assets: | | |
Plan assets | 0 | 0 |
Georgia Power | Significant Other Observable Inputs (Level 2) | Other postretirement benefit plans | Trust-owned life insurance | | |
Assets: | | |
Plan assets | 189 | 188 |
Georgia Power | Significant Other Observable Inputs (Level 2) | Other postretirement benefit plans | Real estate investments | | |
Assets: | | |
Plan assets | 0 | 0 |
Georgia Power | Significant Other Observable Inputs (Level 2) | Other postretirement benefit plans | Special situations | | |
Assets: | | |
Plan assets | 0 | 0 |
Georgia Power | Significant Other Observable Inputs (Level 2) | Other postretirement benefit plans | Private equity | | |
Assets: | | |
Plan assets | 0 | 0 |
Georgia Power | Significant Unobservable Inputs (Level 3) | Pension plans | | |
Assets: | | |
Plan assets | 1 | |
Georgia Power | Significant Unobservable Inputs (Level 3) | Pension plans | Domestic equity | | |
Assets: | | |
Plan assets | 0 | |
Georgia Power | Significant Unobservable Inputs (Level 3) | Pension plans | International equity | | |
Assets: | | |
Plan assets | 1 | |
Georgia Power | Significant Unobservable Inputs (Level 3) | Pension plans | U.S. Treasury, government, and agency bonds | | |
Assets: | | |
Plan assets | 0 | |
Georgia Power | Significant Unobservable Inputs (Level 3) | Pension plans | Mortgage- and asset-backed securities | | |
Assets: | | |
Plan assets | 0 | |
Georgia Power | Significant Unobservable Inputs (Level 3) | Pension plans | Corporate bonds | | |
Assets: | | |
Plan assets | 0 | |
Georgia Power | Significant Unobservable Inputs (Level 3) | Pension plans | Pooled funds | | |
Assets: | | |
Plan assets | 0 | |
Georgia Power | Significant Unobservable Inputs (Level 3) | Pension plans | Cash equivalents and other | | |
Assets: | | |
Plan assets | 0 | |
Georgia Power | Significant Unobservable Inputs (Level 3) | Pension plans | Real estate investments | | |
Assets: | | |
Plan assets | 0 | |
Georgia Power | Significant Unobservable Inputs (Level 3) | Pension plans | Special situations | | |
Assets: | | |
Plan assets | 0 | |
Georgia Power | Significant Unobservable Inputs (Level 3) | Pension plans | Private equity | | |
Assets: | | |
Plan assets | 0 | |
Georgia Power | Net Asset Value as a Practical Expedient (NAV) | Pension plans | | |
Assets: | | |
Plan assets | 1,195 | 904 |
Georgia Power | Net Asset Value as a Practical Expedient (NAV) | Pension plans | Domestic equity | | |
Assets: | | |
Plan assets | 0 | 0 |
Georgia Power | Net Asset Value as a Practical Expedient (NAV) | Pension plans | International equity | | |
Assets: | | |
Plan assets | 0 | 0 |
Georgia Power | Net Asset Value as a Practical Expedient (NAV) | Pension plans | U.S. Treasury, government, and agency bonds | | |
Assets: | | |
Plan assets | 0 | 0 |
Georgia Power | Net Asset Value as a Practical Expedient (NAV) | Pension plans | Mortgage- and asset-backed securities | | |
Assets: | | |
Plan assets | 0 | 0 |
Georgia Power | Net Asset Value as a Practical Expedient (NAV) | Pension plans | Corporate bonds | | |
Assets: | | |
Plan assets | 0 | 0 |
Georgia Power | Net Asset Value as a Practical Expedient (NAV) | Pension plans | Pooled funds | | |
Assets: | | |
Plan assets | 0 | 0 |
Georgia Power | Net Asset Value as a Practical Expedient (NAV) | Pension plans | Cash equivalents and other | | |
Assets: | | |
Plan assets | 0 | 0 |
Georgia Power | Net Asset Value as a Practical Expedient (NAV) | Pension plans | Real estate investments | | |
Assets: | | |
Plan assets | 641 | 503 |
Georgia Power | Net Asset Value as a Practical Expedient (NAV) | Pension plans | Special situations | | |
Assets: | | |
Plan assets | 54 | 53 |
Georgia Power | Net Asset Value as a Practical Expedient (NAV) | Pension plans | Private equity | | |
Assets: | | |
Plan assets | 500 | 348 |
Georgia Power | Net Asset Value as a Practical Expedient (NAV) | Other postretirement benefit plans | | |
Assets: | | |
Plan assets | 30 | 23 |
Georgia Power | Net Asset Value as a Practical Expedient (NAV) | Other postretirement benefit plans | Domestic equity | | |
Assets: | | |
Plan assets | 0 | 0 |
Georgia Power | Net Asset Value as a Practical Expedient (NAV) | Other postretirement benefit plans | International equity | | |
Assets: | | |
Plan assets | 0 | 0 |
Georgia Power | Net Asset Value as a Practical Expedient (NAV) | Other postretirement benefit plans | U.S. Treasury, government, and agency bonds | | |
Assets: | | |
Plan assets | 0 | 0 |
Georgia Power | Net Asset Value as a Practical Expedient (NAV) | Other postretirement benefit plans | Corporate bonds | | |
Assets: | | |
Plan assets | 0 | 0 |
Georgia Power | Net Asset Value as a Practical Expedient (NAV) | Other postretirement benefit plans | Pooled funds | | |
Assets: | | |
Plan assets | 0 | 0 |
Georgia Power | Net Asset Value as a Practical Expedient (NAV) | Other postretirement benefit plans | Cash equivalents and other | | |
Assets: | | |
Plan assets | 0 | 0 |
Georgia Power | Net Asset Value as a Practical Expedient (NAV) | Other postretirement benefit plans | Trust-owned life insurance | | |
Assets: | | |
Plan assets | 0 | 0 |
Georgia Power | Net Asset Value as a Practical Expedient (NAV) | Other postretirement benefit plans | Real estate investments | | |
Assets: | | |
Plan assets | 16 | 13 |
Georgia Power | Net Asset Value as a Practical Expedient (NAV) | Other postretirement benefit plans | Special situations | | |
Assets: | | |
Plan assets | 1 | 1 |
Georgia Power | Net Asset Value as a Practical Expedient (NAV) | Other postretirement benefit plans | Private equity | | |
Assets: | | |
Plan assets | 13 | 9 |
Mississippi Power | Pension plans | | |
Assets: | | |
Plan assets | $ 787 | $ 704 |
Target Allocation | 100.00% | 100.00% |
Actual Allocation | 100.00% | 100.00% |
Mississippi Power | Pension plans | Equity | | |
Assets: | | |
Target Allocation | 51.00% | 51.00% |
Actual Allocation | 53.00% | 56.00% |
Mississippi Power | Pension plans | Domestic equity | | |
Assets: | | |
Plan assets | $ 203 | $ 188 |
Mississippi Power | Pension plans | International equity | | |
Assets: | | |
Plan assets | $ 190 | $ 190 |
Mississippi Power | Pension plans | Fixed income | | |
Assets: | | |
Target Allocation | 23.00% | 23.00% |
Actual Allocation | 22.00% | 23.00% |
Mississippi Power | Pension plans | U.S. Treasury, government, and agency bonds | | |
Assets: | | |
Plan assets | $ 55 | $ 43 |
Mississippi Power | Pension plans | Corporate bonds | | |
Assets: | | |
Plan assets | 80 | 76 |
Mississippi Power | Pension plans | Pooled funds | | |
Assets: | | |
Plan assets | 35 | 35 |
Mississippi Power | Pension plans | Cash equivalents and other | | |
Assets: | | |
Plan assets | 18 | 16 |
Mississippi Power | Pension plans | Real estate investments | | |
Assets: | | |
Plan assets | $ 125 | $ 98 |
Target Allocation | 14.00% | 14.00% |
Actual Allocation | 15.00% | 13.00% |
Mississippi Power | Pension plans | Special situations | | |
Assets: | | |
Plan assets | $ 8 | $ 8 |
Target Allocation | 3.00% | 3.00% |
Actual Allocation | 1.00% | 1.00% |
Mississippi Power | Pension plans | Private equity | | |
Assets: | | |
Plan assets | $ 73 | $ 50 |
Target Allocation | 9.00% | 9.00% |
Actual Allocation | 9.00% | 7.00% |
Mississippi Power | Other postretirement benefit plans | | |
Assets: | | |
Plan assets | $ 27 | $ 26 |
Target Allocation | 100.00% | 100.00% |
Actual Allocation | 100.00% | 100.00% |
Mississippi Power | Other postretirement benefit plans | Equity | | |
Assets: | | |
Target Allocation | 43.00% | 43.00% |
Actual Allocation | 44.00% | 46.00% |
Mississippi Power | Other postretirement benefit plans | Domestic equity | | |
Assets: | | |
Plan assets | $ 6 | $ 6 |
Mississippi Power | Other postretirement benefit plans | International equity | | |
Assets: | | |
Plan assets | $ 6 | $ 6 |
Mississippi Power | Other postretirement benefit plans | Fixed income | | |
Assets: | | |
Target Allocation | 36.00% | 37.00% |
Actual Allocation | 34.00% | 36.00% |
Mississippi Power | Other postretirement benefit plans | U.S. Treasury, government, and agency bonds | | |
Assets: | | |
Plan assets | $ 5 | $ 5 |
Mississippi Power | Other postretirement benefit plans | Corporate bonds | | |
Assets: | | |
Plan assets | 2 | 2 |
Mississippi Power | Other postretirement benefit plans | Pooled funds | | |
Assets: | | |
Plan assets | 1 | 1 |
Mississippi Power | Other postretirement benefit plans | Cash equivalents and other | | |
Assets: | | |
Plan assets | 1 | 1 |
Mississippi Power | Other postretirement benefit plans | Real estate investments | | |
Assets: | | |
Plan assets | $ 4 | $ 3 |
Target Allocation | 11.00% | 11.00% |
Actual Allocation | 13.00% | 11.00% |
Mississippi Power | Other postretirement benefit plans | Special situations | | |
Assets: | | |
Plan assets | $ 0 | $ 0 |
Target Allocation | 2.00% | 2.00% |
Actual Allocation | 1.00% | 1.00% |
Mississippi Power | Other postretirement benefit plans | Private equity | | |
Assets: | | |
Plan assets | $ 2 | $ 2 |
Target Allocation | 8.00% | 7.00% |
Actual Allocation | 8.00% | 6.00% |
Mississippi Power | Quoted Prices in Active Markets for Identical Assets (Level 1) | Pension plans | | |
Assets: | | |
Plan assets | $ 318 | $ 294 |
Mississippi Power | Quoted Prices in Active Markets for Identical Assets (Level 1) | Pension plans | Domestic equity | | |
Assets: | | |
Plan assets | 142 | 131 |
Mississippi Power | Quoted Prices in Active Markets for Identical Assets (Level 1) | Pension plans | International equity | | |
Assets: | | |
Plan assets | 126 | 122 |
Mississippi Power | Quoted Prices in Active Markets for Identical Assets (Level 1) | Pension plans | U.S. Treasury, government, and agency bonds | | |
Assets: | | |
Plan assets | 0 | 0 |
Mississippi Power | Quoted Prices in Active Markets for Identical Assets (Level 1) | Pension plans | Corporate bonds | | |
Assets: | | |
Plan assets | 0 | 0 |
Mississippi Power | Quoted Prices in Active Markets for Identical Assets (Level 1) | Pension plans | Pooled funds | | |
Assets: | | |
Plan assets | 0 | 0 |
Mississippi Power | Quoted Prices in Active Markets for Identical Assets (Level 1) | Pension plans | Cash equivalents and other | | |
Assets: | | |
Plan assets | 18 | 16 |
Mississippi Power | Quoted Prices in Active Markets for Identical Assets (Level 1) | Pension plans | Real estate investments | | |
Assets: | | |
Plan assets | 32 | 25 |
Mississippi Power | Quoted Prices in Active Markets for Identical Assets (Level 1) | Pension plans | Special situations | | |
Assets: | | |
Plan assets | 0 | 0 |
Mississippi Power | Quoted Prices in Active Markets for Identical Assets (Level 1) | Pension plans | Private equity | | |
Assets: | | |
Plan assets | 0 | 0 |
Mississippi Power | Quoted Prices in Active Markets for Identical Assets (Level 1) | Other postretirement benefit plans | | |
Assets: | | |
Plan assets | 10 | 10 |
Mississippi Power | Quoted Prices in Active Markets for Identical Assets (Level 1) | Other postretirement benefit plans | Domestic equity | | |
Assets: | | |
Plan assets | 4 | 4 |
Mississippi Power | Quoted Prices in Active Markets for Identical Assets (Level 1) | Other postretirement benefit plans | International equity | | |
Assets: | | |
Plan assets | 4 | 4 |
Mississippi Power | Quoted Prices in Active Markets for Identical Assets (Level 1) | Other postretirement benefit plans | U.S. Treasury, government, and agency bonds | | |
Assets: | | |
Plan assets | 0 | 0 |
Mississippi Power | Quoted Prices in Active Markets for Identical Assets (Level 1) | Other postretirement benefit plans | Corporate bonds | | |
Assets: | | |
Plan assets | 0 | 0 |
Mississippi Power | Quoted Prices in Active Markets for Identical Assets (Level 1) | Other postretirement benefit plans | Pooled funds | | |
Assets: | | |
Plan assets | 0 | 0 |
Mississippi Power | Quoted Prices in Active Markets for Identical Assets (Level 1) | Other postretirement benefit plans | Cash equivalents and other | | |
Assets: | | |
Plan assets | 1 | 1 |
Mississippi Power | Quoted Prices in Active Markets for Identical Assets (Level 1) | Other postretirement benefit plans | Real estate investments | | |
Assets: | | |
Plan assets | 1 | 1 |
Mississippi Power | Quoted Prices in Active Markets for Identical Assets (Level 1) | Other postretirement benefit plans | Special situations | | |
Assets: | | |
Plan assets | 0 | 0 |
Mississippi Power | Quoted Prices in Active Markets for Identical Assets (Level 1) | Other postretirement benefit plans | Private equity | | |
Assets: | | |
Plan assets | 0 | 0 |
Mississippi Power | Significant Other Observable Inputs (Level 2) | Pension plans | | |
Assets: | | |
Plan assets | 295 | 279 |
Mississippi Power | Significant Other Observable Inputs (Level 2) | Pension plans | Domestic equity | | |
Assets: | | |
Plan assets | 61 | 57 |
Mississippi Power | Significant Other Observable Inputs (Level 2) | Pension plans | International equity | | |
Assets: | | |
Plan assets | 64 | 68 |
Mississippi Power | Significant Other Observable Inputs (Level 2) | Pension plans | U.S. Treasury, government, and agency bonds | | |
Assets: | | |
Plan assets | 55 | 43 |
Mississippi Power | Significant Other Observable Inputs (Level 2) | Pension plans | Corporate bonds | | |
Assets: | | |
Plan assets | 80 | 76 |
Mississippi Power | Significant Other Observable Inputs (Level 2) | Pension plans | Pooled funds | | |
Assets: | | |
Plan assets | 35 | 35 |
Mississippi Power | Significant Other Observable Inputs (Level 2) | Pension plans | Cash equivalents and other | | |
Assets: | | |
Plan assets | 0 | 0 |
Mississippi Power | Significant Other Observable Inputs (Level 2) | Pension plans | Real estate investments | | |
Assets: | | |
Plan assets | 0 | 0 |
Mississippi Power | Significant Other Observable Inputs (Level 2) | Pension plans | Special situations | | |
Assets: | | |
Plan assets | 0 | 0 |
Mississippi Power | Significant Other Observable Inputs (Level 2) | Pension plans | Private equity | | |
Assets: | | |
Plan assets | 0 | 0 |
Mississippi Power | Significant Other Observable Inputs (Level 2) | Other postretirement benefit plans | | |
Assets: | | |
Plan assets | 12 | 12 |
Mississippi Power | Significant Other Observable Inputs (Level 2) | Other postretirement benefit plans | Domestic equity | | |
Assets: | | |
Plan assets | 2 | 2 |
Mississippi Power | Significant Other Observable Inputs (Level 2) | Other postretirement benefit plans | International equity | | |
Assets: | | |
Plan assets | 2 | 2 |
Mississippi Power | Significant Other Observable Inputs (Level 2) | Other postretirement benefit plans | U.S. Treasury, government, and agency bonds | | |
Assets: | | |
Plan assets | 5 | 5 |
Mississippi Power | Significant Other Observable Inputs (Level 2) | Other postretirement benefit plans | Corporate bonds | | |
Assets: | | |
Plan assets | 2 | 2 |
Mississippi Power | Significant Other Observable Inputs (Level 2) | Other postretirement benefit plans | Pooled funds | | |
Assets: | | |
Plan assets | 1 | 1 |
Mississippi Power | Significant Other Observable Inputs (Level 2) | Other postretirement benefit plans | Cash equivalents and other | | |
Assets: | | |
Plan assets | 0 | 0 |
Mississippi Power | Significant Other Observable Inputs (Level 2) | Other postretirement benefit plans | Real estate investments | | |
Assets: | | |
Plan assets | 0 | 0 |
Mississippi Power | Significant Other Observable Inputs (Level 2) | Other postretirement benefit plans | Special situations | | |
Assets: | | |
Plan assets | 0 | 0 |
Mississippi Power | Significant Other Observable Inputs (Level 2) | Other postretirement benefit plans | Private equity | | |
Assets: | | |
Plan assets | 0 | 0 |
Mississippi Power | Significant Unobservable Inputs (Level 3) | Pension plans | | |
Assets: | | |
Plan assets | 0 | |
Mississippi Power | Significant Unobservable Inputs (Level 3) | Pension plans | Domestic equity | | |
Assets: | | |
Plan assets | 0 | |
Mississippi Power | Significant Unobservable Inputs (Level 3) | Pension plans | International equity | | |
Assets: | | |
Plan assets | 0 | |
Mississippi Power | Significant Unobservable Inputs (Level 3) | Pension plans | U.S. Treasury, government, and agency bonds | | |
Assets: | | |
Plan assets | 0 | |
Mississippi Power | Significant Unobservable Inputs (Level 3) | Pension plans | Corporate bonds | | |
Assets: | | |
Plan assets | 0 | |
Mississippi Power | Significant Unobservable Inputs (Level 3) | Pension plans | Pooled funds | | |
Assets: | | |
Plan assets | 0 | |
Mississippi Power | Significant Unobservable Inputs (Level 3) | Pension plans | Cash equivalents and other | | |
Assets: | | |
Plan assets | 0 | |
Mississippi Power | Significant Unobservable Inputs (Level 3) | Pension plans | Real estate investments | | |
Assets: | | |
Plan assets | 0 | |
Mississippi Power | Significant Unobservable Inputs (Level 3) | Pension plans | Special situations | | |
Assets: | | |
Plan assets | 0 | |
Mississippi Power | Significant Unobservable Inputs (Level 3) | Pension plans | Private equity | | |
Assets: | | |
Plan assets | 0 | |
Mississippi Power | Net Asset Value as a Practical Expedient (NAV) | Pension plans | | |
Assets: | | |
Plan assets | 174 | 131 |
Mississippi Power | Net Asset Value as a Practical Expedient (NAV) | Pension plans | Domestic equity | | |
Assets: | | |
Plan assets | 0 | 0 |
Mississippi Power | Net Asset Value as a Practical Expedient (NAV) | Pension plans | International equity | | |
Assets: | | |
Plan assets | 0 | 0 |
Mississippi Power | Net Asset Value as a Practical Expedient (NAV) | Pension plans | U.S. Treasury, government, and agency bonds | | |
Assets: | | |
Plan assets | 0 | 0 |
Mississippi Power | Net Asset Value as a Practical Expedient (NAV) | Pension plans | Corporate bonds | | |
Assets: | | |
Plan assets | 0 | 0 |
Mississippi Power | Net Asset Value as a Practical Expedient (NAV) | Pension plans | Pooled funds | | |
Assets: | | |
Plan assets | 0 | 0 |
Mississippi Power | Net Asset Value as a Practical Expedient (NAV) | Pension plans | Cash equivalents and other | | |
Assets: | | |
Plan assets | 0 | 0 |
Mississippi Power | Net Asset Value as a Practical Expedient (NAV) | Pension plans | Real estate investments | | |
Assets: | | |
Plan assets | 93 | 73 |
Mississippi Power | Net Asset Value as a Practical Expedient (NAV) | Pension plans | Special situations | | |
Assets: | | |
Plan assets | 8 | 8 |
Mississippi Power | Net Asset Value as a Practical Expedient (NAV) | Pension plans | Private equity | | |
Assets: | | |
Plan assets | 73 | 50 |
Mississippi Power | Net Asset Value as a Practical Expedient (NAV) | Other postretirement benefit plans | | |
Assets: | | |
Plan assets | 5 | 4 |
Mississippi Power | Net Asset Value as a Practical Expedient (NAV) | Other postretirement benefit plans | Domestic equity | | |
Assets: | | |
Plan assets | 0 | 0 |
Mississippi Power | Net Asset Value as a Practical Expedient (NAV) | Other postretirement benefit plans | International equity | | |
Assets: | | |
Plan assets | 0 | 0 |
Mississippi Power | Net Asset Value as a Practical Expedient (NAV) | Other postretirement benefit plans | U.S. Treasury, government, and agency bonds | | |
Assets: | | |
Plan assets | 0 | 0 |
Mississippi Power | Net Asset Value as a Practical Expedient (NAV) | Other postretirement benefit plans | Corporate bonds | | |
Assets: | | |
Plan assets | 0 | 0 |
Mississippi Power | Net Asset Value as a Practical Expedient (NAV) | Other postretirement benefit plans | Pooled funds | | |
Assets: | | |
Plan assets | 0 | 0 |
Mississippi Power | Net Asset Value as a Practical Expedient (NAV) | Other postretirement benefit plans | Cash equivalents and other | | |
Assets: | | |
Plan assets | 0 | 0 |
Mississippi Power | Net Asset Value as a Practical Expedient (NAV) | Other postretirement benefit plans | Real estate investments | | |
Assets: | | |
Plan assets | 3 | 2 |
Mississippi Power | Net Asset Value as a Practical Expedient (NAV) | Other postretirement benefit plans | Special situations | | |
Assets: | | |
Plan assets | 0 | 0 |
Mississippi Power | Net Asset Value as a Practical Expedient (NAV) | Other postretirement benefit plans | Private equity | | |
Assets: | | |
Plan assets | 2 | 2 |
Southern Power | Pension plans | | |
Assets: | | |
Plan assets | $ 213 | $ 187 |
Target Allocation | 100.00% | 100.00% |
Actual Allocation | 100.00% | 100.00% |
Southern Power | Pension plans | Equity | | |
Assets: | | |
Target Allocation | 51.00% | 51.00% |
Actual Allocation | 53.00% | 56.00% |
Southern Power | Pension plans | Domestic equity | | |
Assets: | | |
Plan assets | $ 54 | $ 50 |
Southern Power | Pension plans | International equity | | |
Assets: | | |
Plan assets | $ 51 | $ 51 |
Southern Power | Pension plans | Fixed income | | |
Assets: | | |
Target Allocation | 23.00% | 23.00% |
Actual Allocation | 22.00% | 23.00% |
Southern Power | Pension plans | U.S. Treasury, government, and agency bonds | | |
Assets: | | |
Plan assets | $ 15 | $ 12 |
Southern Power | Pension plans | Corporate bonds | | |
Assets: | | |
Plan assets | 22 | 20 |
Southern Power | Pension plans | Pooled funds | | |
Assets: | | |
Plan assets | 10 | 9 |
Southern Power | Pension plans | Cash equivalents and other | | |
Assets: | | |
Plan assets | 5 | 4 |
Southern Power | Pension plans | Real estate investments | | |
Assets: | | |
Plan assets | $ 34 | $ 26 |
Target Allocation | 14.00% | 14.00% |
Actual Allocation | 15.00% | 13.00% |
Southern Power | Pension plans | Special situations | | |
Assets: | | |
Plan assets | $ 2 | $ 2 |
Target Allocation | 3.00% | 3.00% |
Actual Allocation | 1.00% | 1.00% |
Southern Power | Pension plans | Private equity | | |
Assets: | | |
Plan assets | $ 20 | $ 13 |
Target Allocation | 9.00% | 9.00% |
Actual Allocation | 9.00% | 7.00% |
Southern Power | Quoted Prices in Active Markets for Identical Assets (Level 1) | Pension plans | | |
Assets: | | |
Plan assets | $ 86 | $ 78 |
Southern Power | Quoted Prices in Active Markets for Identical Assets (Level 1) | Pension plans | Domestic equity | | |
Assets: | | |
Plan assets | 38 | 35 |
Southern Power | Quoted Prices in Active Markets for Identical Assets (Level 1) | Pension plans | International equity | | |
Assets: | | |
Plan assets | 34 | 32 |
Southern Power | Quoted Prices in Active Markets for Identical Assets (Level 1) | Pension plans | U.S. Treasury, government, and agency bonds | | |
Assets: | | |
Plan assets | 0 | 0 |
Southern Power | Quoted Prices in Active Markets for Identical Assets (Level 1) | Pension plans | Corporate bonds | | |
Assets: | | |
Plan assets | 0 | 0 |
Southern Power | Quoted Prices in Active Markets for Identical Assets (Level 1) | Pension plans | Pooled funds | | |
Assets: | | |
Plan assets | 0 | 0 |
Southern Power | Quoted Prices in Active Markets for Identical Assets (Level 1) | Pension plans | Cash equivalents and other | | |
Assets: | | |
Plan assets | 5 | 4 |
Southern Power | Quoted Prices in Active Markets for Identical Assets (Level 1) | Pension plans | Real estate investments | | |
Assets: | | |
Plan assets | 9 | 7 |
Southern Power | Quoted Prices in Active Markets for Identical Assets (Level 1) | Pension plans | Special situations | | |
Assets: | | |
Plan assets | 0 | 0 |
Southern Power | Quoted Prices in Active Markets for Identical Assets (Level 1) | Pension plans | Private equity | | |
Assets: | | |
Plan assets | 0 | 0 |
Southern Power | Significant Other Observable Inputs (Level 2) | Pension plans | | |
Assets: | | |
Plan assets | 80 | 75 |
Southern Power | Significant Other Observable Inputs (Level 2) | Pension plans | Domestic equity | | |
Assets: | | |
Plan assets | 16 | 15 |
Southern Power | Significant Other Observable Inputs (Level 2) | Pension plans | International equity | | |
Assets: | | |
Plan assets | 17 | 19 |
Southern Power | Significant Other Observable Inputs (Level 2) | Pension plans | U.S. Treasury, government, and agency bonds | | |
Assets: | | |
Plan assets | 15 | 12 |
Southern Power | Significant Other Observable Inputs (Level 2) | Pension plans | Corporate bonds | | |
Assets: | | |
Plan assets | 22 | 20 |
Southern Power | Significant Other Observable Inputs (Level 2) | Pension plans | Pooled funds | | |
Assets: | | |
Plan assets | 10 | 9 |
Southern Power | Significant Other Observable Inputs (Level 2) | Pension plans | Cash equivalents and other | | |
Assets: | | |
Plan assets | 0 | 0 |
Southern Power | Significant Other Observable Inputs (Level 2) | Pension plans | Real estate investments | | |
Assets: | | |
Plan assets | 0 | 0 |
Southern Power | Significant Other Observable Inputs (Level 2) | Pension plans | Special situations | | |
Assets: | | |
Plan assets | 0 | 0 |
Southern Power | Significant Other Observable Inputs (Level 2) | Pension plans | Private equity | | |
Assets: | | |
Plan assets | 0 | 0 |
Southern Power | Significant Unobservable Inputs (Level 3) | Pension plans | | |
Assets: | | |
Plan assets | 0 | |
Southern Power | Significant Unobservable Inputs (Level 3) | Pension plans | Domestic equity | | |
Assets: | | |
Plan assets | 0 | |
Southern Power | Significant Unobservable Inputs (Level 3) | Pension plans | International equity | | |
Assets: | | |
Plan assets | 0 | |
Southern Power | Significant Unobservable Inputs (Level 3) | Pension plans | U.S. Treasury, government, and agency bonds | | |
Assets: | | |
Plan assets | 0 | |
Southern Power | Significant Unobservable Inputs (Level 3) | Pension plans | Corporate bonds | | |
Assets: | | |
Plan assets | 0 | |
Southern Power | Significant Unobservable Inputs (Level 3) | Pension plans | Pooled funds | | |
Assets: | | |
Plan assets | 0 | |
Southern Power | Significant Unobservable Inputs (Level 3) | Pension plans | Cash equivalents and other | | |
Assets: | | |
Plan assets | 0 | |
Southern Power | Significant Unobservable Inputs (Level 3) | Pension plans | Real estate investments | | |
Assets: | | |
Plan assets | 0 | |
Southern Power | Significant Unobservable Inputs (Level 3) | Pension plans | Special situations | | |
Assets: | | |
Plan assets | 0 | |
Southern Power | Significant Unobservable Inputs (Level 3) | Pension plans | Private equity | | |
Assets: | | |
Plan assets | 0 | |
Southern Power | Net Asset Value as a Practical Expedient (NAV) | Pension plans | | |
Assets: | | |
Plan assets | 47 | 34 |
Southern Power | Net Asset Value as a Practical Expedient (NAV) | Pension plans | Domestic equity | | |
Assets: | | |
Plan assets | 0 | 0 |
Southern Power | Net Asset Value as a Practical Expedient (NAV) | Pension plans | International equity | | |
Assets: | | |
Plan assets | 0 | 0 |
Southern Power | Net Asset Value as a Practical Expedient (NAV) | Pension plans | U.S. Treasury, government, and agency bonds | | |
Assets: | | |
Plan assets | 0 | 0 |
Southern Power | Net Asset Value as a Practical Expedient (NAV) | Pension plans | Corporate bonds | | |
Assets: | | |
Plan assets | 0 | 0 |
Southern Power | Net Asset Value as a Practical Expedient (NAV) | Pension plans | Pooled funds | | |
Assets: | | |
Plan assets | 0 | 0 |
Southern Power | Net Asset Value as a Practical Expedient (NAV) | Pension plans | Cash equivalents and other | | |
Assets: | | |
Plan assets | 0 | 0 |
Southern Power | Net Asset Value as a Practical Expedient (NAV) | Pension plans | Real estate investments | | |
Assets: | | |
Plan assets | 25 | 19 |
Southern Power | Net Asset Value as a Practical Expedient (NAV) | Pension plans | Special situations | | |
Assets: | | |
Plan assets | 2 | 2 |
Southern Power | Net Asset Value as a Practical Expedient (NAV) | Pension plans | Private equity | | |
Assets: | | |
Plan assets | 20 | 13 |
Southern Company Gas | Pension plans | | |
Assets: | | |
Plan assets | $ 1,241 | $ 1,128 |
Target Allocation | 100.00% | 100.00% |
Actual Allocation | 100.00% | 100.00% |
Southern Company Gas | Pension plans | Equity | | |
Assets: | | |
Target Allocation | 51.00% | 51.00% |
Actual Allocation | 53.00% | 56.00% |
Southern Company Gas | Pension plans | Domestic equity | | |
Assets: | | |
Plan assets | $ 319 | $ 300 |
Southern Company Gas | Pension plans | International equity | | |
Assets: | | |
Plan assets | $ 298 | $ 304 |
Southern Company Gas | Pension plans | Fixed income | | |
Assets: | | |
Target Allocation | 23.00% | 23.00% |
Actual Allocation | 22.00% | 23.00% |
Southern Company Gas | Pension plans | U.S. Treasury, government, and agency bonds | | |
Assets: | | |
Plan assets | $ 87 | $ 69 |
Southern Company Gas | Pension plans | Mortgage- and asset-backed securities | | |
Assets: | | |
Plan assets | 1 | 1 |
Southern Company Gas | Pension plans | Corporate bonds | | |
Assets: | | |
Plan assets | 126 | 122 |
Southern Company Gas | Pension plans | Pooled funds | | |
Assets: | | |
Plan assets | 56 | 56 |
Southern Company Gas | Pension plans | Cash equivalents and other | | |
Assets: | | |
Plan assets | 29 | 26 |
Southern Company Gas | Pension plans | Real estate investments | | |
Assets: | | |
Plan assets | $ 198 | $ 157 |
Target Allocation | 14.00% | 14.00% |
Actual Allocation | 15.00% | 13.00% |
Southern Company Gas | Pension plans | Special situations | | |
Assets: | | |
Plan assets | $ 12 | $ 12 |
Target Allocation | 3.00% | 3.00% |
Actual Allocation | 1.00% | 1.00% |
Southern Company Gas | Pension plans | Private equity | | |
Assets: | | |
Plan assets | $ 115 | $ 81 |
Target Allocation | 9.00% | 9.00% |
Actual Allocation | 9.00% | 7.00% |
Southern Company Gas | Other postretirement benefit plans | | |
Assets: | | |
Plan assets | $ 143 | $ 125 |
Target Allocation | 100.00% | 100.00% |
Actual Allocation | 100.00% | 100.00% |
Southern Company Gas | Other postretirement benefit plans | Equity | | |
Assets: | | |
Target Allocation | 72.00% | 72.00% |
Actual Allocation | 73.00% | 76.00% |
Southern Company Gas | Other postretirement benefit plans | Domestic equity | | |
Assets: | | |
Plan assets | $ 79 | $ 68 |
Southern Company Gas | Other postretirement benefit plans | International equity | | |
Assets: | | |
Plan assets | $ 26 | $ 27 |
Southern Company Gas | Other postretirement benefit plans | Fixed income | | |
Assets: | | |
Target Allocation | 26.00% | 26.00% |
Actual Allocation | 24.00% | 22.00% |
Southern Company Gas | Other postretirement benefit plans | U.S. Treasury, government, and agency bonds | | |
Assets: | | |
Plan assets | $ 1 | $ 1 |
Southern Company Gas | Other postretirement benefit plans | Corporate bonds | | |
Assets: | | |
Plan assets | 1 | 1 |
Southern Company Gas | Other postretirement benefit plans | Pooled funds | | |
Assets: | | |
Plan assets | 30 | 25 |
Southern Company Gas | Other postretirement benefit plans | Cash equivalents and other | | |
Assets: | | |
Plan assets | 2 | 1 |
Southern Company Gas | Other postretirement benefit plans | Real estate investments | | |
Assets: | | |
Plan assets | $ 3 | $ 1 |
Target Allocation | 1.00% | 1.00% |
Actual Allocation | 2.00% | 1.00% |
Southern Company Gas | Other postretirement benefit plans | Private equity | | |
Assets: | | |
Plan assets | $ 1 | $ 1 |
Target Allocation | 1.00% | 1.00% |
Actual Allocation | 1.00% | 1.00% |
Southern Company Gas | Quoted Prices in Active Markets for Identical Assets (Level 1) | Pension plans | | |
Assets: | | |
Plan assets | $ 500 | $ 470 |
Southern Company Gas | Quoted Prices in Active Markets for Identical Assets (Level 1) | Pension plans | Domestic equity | | |
Assets: | | |
Plan assets | 223 | 209 |
Southern Company Gas | Quoted Prices in Active Markets for Identical Assets (Level 1) | Pension plans | International equity | | |
Assets: | | |
Plan assets | 197 | 195 |
Southern Company Gas | Quoted Prices in Active Markets for Identical Assets (Level 1) | Pension plans | U.S. Treasury, government, and agency bonds | | |
Assets: | | |
Plan assets | 0 | 0 |
Southern Company Gas | Quoted Prices in Active Markets for Identical Assets (Level 1) | Pension plans | Mortgage- and asset-backed securities | | |
Assets: | | |
Plan assets | 0 | 0 |
Southern Company Gas | Quoted Prices in Active Markets for Identical Assets (Level 1) | Pension plans | Corporate bonds | | |
Assets: | | |
Plan assets | 0 | 0 |
Southern Company Gas | Quoted Prices in Active Markets for Identical Assets (Level 1) | Pension plans | Pooled funds | | |
Assets: | | |
Plan assets | 0 | 0 |
Southern Company Gas | Quoted Prices in Active Markets for Identical Assets (Level 1) | Pension plans | Cash equivalents and other | | |
Assets: | | |
Plan assets | 29 | 26 |
Southern Company Gas | Quoted Prices in Active Markets for Identical Assets (Level 1) | Pension plans | Real estate investments | | |
Assets: | | |
Plan assets | 51 | 40 |
Southern Company Gas | Quoted Prices in Active Markets for Identical Assets (Level 1) | Pension plans | Special situations | | |
Assets: | | |
Plan assets | 0 | 0 |
Southern Company Gas | Quoted Prices in Active Markets for Identical Assets (Level 1) | Pension plans | Private equity | | |
Assets: | | |
Plan assets | 0 | 0 |
Southern Company Gas | Quoted Prices in Active Markets for Identical Assets (Level 1) | Other postretirement benefit plans | | |
Assets: | | |
Plan assets | 8 | 5 |
Southern Company Gas | Quoted Prices in Active Markets for Identical Assets (Level 1) | Other postretirement benefit plans | Domestic equity | | |
Assets: | | |
Plan assets | 3 | 2 |
Southern Company Gas | Quoted Prices in Active Markets for Identical Assets (Level 1) | Other postretirement benefit plans | International equity | | |
Assets: | | |
Plan assets | 2 | 2 |
Southern Company Gas | Quoted Prices in Active Markets for Identical Assets (Level 1) | Other postretirement benefit plans | U.S. Treasury, government, and agency bonds | | |
Assets: | | |
Plan assets | 0 | 0 |
Southern Company Gas | Quoted Prices in Active Markets for Identical Assets (Level 1) | Other postretirement benefit plans | Corporate bonds | | |
Assets: | | |
Plan assets | 0 | 0 |
Southern Company Gas | Quoted Prices in Active Markets for Identical Assets (Level 1) | Other postretirement benefit plans | Pooled funds | | |
Assets: | | |
Plan assets | 0 | 0 |
Southern Company Gas | Quoted Prices in Active Markets for Identical Assets (Level 1) | Other postretirement benefit plans | Cash equivalents and other | | |
Assets: | | |
Plan assets | 2 | 1 |
Southern Company Gas | Quoted Prices in Active Markets for Identical Assets (Level 1) | Other postretirement benefit plans | Real estate investments | | |
Assets: | | |
Plan assets | 1 | 0 |
Southern Company Gas | Quoted Prices in Active Markets for Identical Assets (Level 1) | Other postretirement benefit plans | Private equity | | |
Assets: | | |
Plan assets | 0 | 0 |
Southern Company Gas | Significant Other Observable Inputs (Level 2) | Pension plans | | |
Assets: | | |
Plan assets | 467 | 448 |
Southern Company Gas | Significant Other Observable Inputs (Level 2) | Pension plans | Domestic equity | | |
Assets: | | |
Plan assets | 96 | 91 |
Southern Company Gas | Significant Other Observable Inputs (Level 2) | Pension plans | International equity | | |
Assets: | | |
Plan assets | 101 | 109 |
Southern Company Gas | Significant Other Observable Inputs (Level 2) | Pension plans | U.S. Treasury, government, and agency bonds | | |
Assets: | | |
Plan assets | 87 | 69 |
Southern Company Gas | Significant Other Observable Inputs (Level 2) | Pension plans | Mortgage- and asset-backed securities | | |
Assets: | | |
Plan assets | 1 | 1 |
Southern Company Gas | Significant Other Observable Inputs (Level 2) | Pension plans | Corporate bonds | | |
Assets: | | |
Plan assets | 126 | 122 |
Southern Company Gas | Significant Other Observable Inputs (Level 2) | Pension plans | Pooled funds | | |
Assets: | | |
Plan assets | 56 | 56 |
Southern Company Gas | Significant Other Observable Inputs (Level 2) | Pension plans | Cash equivalents and other | | |
Assets: | | |
Plan assets | 0 | 0 |
Southern Company Gas | Significant Other Observable Inputs (Level 2) | Pension plans | Real estate investments | | |
Assets: | | |
Plan assets | 0 | 0 |
Southern Company Gas | Significant Other Observable Inputs (Level 2) | Pension plans | Special situations | | |
Assets: | | |
Plan assets | 0 | 0 |
Southern Company Gas | Significant Other Observable Inputs (Level 2) | Pension plans | Private equity | | |
Assets: | | |
Plan assets | 0 | 0 |
Southern Company Gas | Significant Other Observable Inputs (Level 2) | Other postretirement benefit plans | | |
Assets: | | |
Plan assets | 132 | 118 |
Southern Company Gas | Significant Other Observable Inputs (Level 2) | Other postretirement benefit plans | Domestic equity | | |
Assets: | | |
Plan assets | 76 | 66 |
Southern Company Gas | Significant Other Observable Inputs (Level 2) | Other postretirement benefit plans | International equity | | |
Assets: | | |
Plan assets | 24 | 25 |
Southern Company Gas | Significant Other Observable Inputs (Level 2) | Other postretirement benefit plans | U.S. Treasury, government, and agency bonds | | |
Assets: | | |
Plan assets | 1 | 1 |
Southern Company Gas | Significant Other Observable Inputs (Level 2) | Other postretirement benefit plans | Corporate bonds | | |
Assets: | | |
Plan assets | 1 | 1 |
Southern Company Gas | Significant Other Observable Inputs (Level 2) | Other postretirement benefit plans | Pooled funds | | |
Assets: | | |
Plan assets | 30 | 25 |
Southern Company Gas | Significant Other Observable Inputs (Level 2) | Other postretirement benefit plans | Cash equivalents and other | | |
Assets: | | |
Plan assets | 0 | 0 |
Southern Company Gas | Significant Other Observable Inputs (Level 2) | Other postretirement benefit plans | Real estate investments | | |
Assets: | | |
Plan assets | 0 | 0 |
Southern Company Gas | Significant Other Observable Inputs (Level 2) | Other postretirement benefit plans | Private equity | | |
Assets: | | |
Plan assets | 0 | 0 |
Southern Company Gas | Significant Unobservable Inputs (Level 3) | Pension plans | | |
Assets: | | |
Plan assets | 0 | |
Southern Company Gas | Significant Unobservable Inputs (Level 3) | Pension plans | Domestic equity | | |
Assets: | | |
Plan assets | 0 | |
Southern Company Gas | Significant Unobservable Inputs (Level 3) | Pension plans | International equity | | |
Assets: | | |
Plan assets | 0 | |
Southern Company Gas | Significant Unobservable Inputs (Level 3) | Pension plans | U.S. Treasury, government, and agency bonds | | |
Assets: | | |
Plan assets | 0 | |
Southern Company Gas | Significant Unobservable Inputs (Level 3) | Pension plans | Mortgage- and asset-backed securities | | |
Assets: | | |
Plan assets | 0 | |
Southern Company Gas | Significant Unobservable Inputs (Level 3) | Pension plans | Corporate bonds | | |
Assets: | | |
Plan assets | 0 | |
Southern Company Gas | Significant Unobservable Inputs (Level 3) | Pension plans | Pooled funds | | |
Assets: | | |
Plan assets | 0 | |
Southern Company Gas | Significant Unobservable Inputs (Level 3) | Pension plans | Cash equivalents and other | | |
Assets: | | |
Plan assets | 0 | |
Southern Company Gas | Significant Unobservable Inputs (Level 3) | Pension plans | Real estate investments | | |
Assets: | | |
Plan assets | 0 | |
Southern Company Gas | Significant Unobservable Inputs (Level 3) | Pension plans | Special situations | | |
Assets: | | |
Plan assets | 0 | |
Southern Company Gas | Significant Unobservable Inputs (Level 3) | Pension plans | Private equity | | |
Assets: | | |
Plan assets | 0 | |
Southern Company Gas | Net Asset Value as a Practical Expedient (NAV) | Pension plans | | |
Assets: | | |
Plan assets | 274 | 210 |
Southern Company Gas | Net Asset Value as a Practical Expedient (NAV) | Pension plans | Domestic equity | | |
Assets: | | |
Plan assets | 0 | 0 |
Southern Company Gas | Net Asset Value as a Practical Expedient (NAV) | Pension plans | International equity | | |
Assets: | | |
Plan assets | 0 | 0 |
Southern Company Gas | Net Asset Value as a Practical Expedient (NAV) | Pension plans | U.S. Treasury, government, and agency bonds | | |
Assets: | | |
Plan assets | 0 | 0 |
Southern Company Gas | Net Asset Value as a Practical Expedient (NAV) | Pension plans | Mortgage- and asset-backed securities | | |
Assets: | | |
Plan assets | 0 | 0 |
Southern Company Gas | Net Asset Value as a Practical Expedient (NAV) | Pension plans | Corporate bonds | | |
Assets: | | |
Plan assets | 0 | 0 |
Southern Company Gas | Net Asset Value as a Practical Expedient (NAV) | Pension plans | Pooled funds | | |
Assets: | | |
Plan assets | 0 | 0 |
Southern Company Gas | Net Asset Value as a Practical Expedient (NAV) | Pension plans | Cash equivalents and other | | |
Assets: | | |
Plan assets | 0 | 0 |
Southern Company Gas | Net Asset Value as a Practical Expedient (NAV) | Pension plans | Real estate investments | | |
Assets: | | |
Plan assets | 147 | 117 |
Southern Company Gas | Net Asset Value as a Practical Expedient (NAV) | Pension plans | Special situations | | |
Assets: | | |
Plan assets | 12 | 12 |
Southern Company Gas | Net Asset Value as a Practical Expedient (NAV) | Pension plans | Private equity | | |
Assets: | | |
Plan assets | 115 | 81 |
Southern Company Gas | Net Asset Value as a Practical Expedient (NAV) | Other postretirement benefit plans | | |
Assets: | | |
Plan assets | 3 | 2 |
Southern Company Gas | Net Asset Value as a Practical Expedient (NAV) | Other postretirement benefit plans | Domestic equity | | |
Assets: | | |
Plan assets | 0 | 0 |
Southern Company Gas | Net Asset Value as a Practical Expedient (NAV) | Other postretirement benefit plans | International equity | | |
Assets: | | |
Plan assets | 0 | 0 |
Southern Company Gas | Net Asset Value as a Practical Expedient (NAV) | Other postretirement benefit plans | U.S. Treasury, government, and agency bonds | | |
Assets: | | |
Plan assets | 0 | 0 |
Southern Company Gas | Net Asset Value as a Practical Expedient (NAV) | Other postretirement benefit plans | Corporate bonds | | |
Assets: | | |
Plan assets | 0 | 0 |
Southern Company Gas | Net Asset Value as a Practical Expedient (NAV) | Other postretirement benefit plans | Pooled funds | | |
Assets: | | |
Plan assets | 0 | 0 |
Southern Company Gas | Net Asset Value as a Practical Expedient (NAV) | Other postretirement benefit plans | Cash equivalents and other | | |
Assets: | | |
Plan assets | 0 | 0 |
Southern Company Gas | Net Asset Value as a Practical Expedient (NAV) | Other postretirement benefit plans | Real estate investments | | |
Assets: | | |
Plan assets | 2 | 1 |
Southern Company Gas | Net Asset Value as a Practical Expedient (NAV) | Other postretirement benefit plans | Private equity | | |
Assets: | | |
Plan assets | $ 1 | $ 1 |