Leases - Undiscounted Cash Flows to be Received Under PPAs Accounted for as Operating Leases (Details) $ in Millions |
Jun. 30, 2019
USD ($)
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| Lessor, Lease, Description [Line Items] | |
| 2019 (remaining) | $ 75 |
| 2020 | 125 |
| 2021 | 118 |
| 2022 | 109 |
| 2023 | 103 |
| Thereafter | 1,142 |
| Total | 1,672 |
| GEORGIA POWER CO | |
| Lessor, Lease, Description [Line Items] | |
| 2019 (remaining) | 13 |
| 2020 | 26 |
| 2021 | 18 |
| 2022 | 8 |
| 2023 | 2 |
| Thereafter | 0 |
| Total | 67 |
| SOUTHERN POWER CO | |
| Lessor, Lease, Description [Line Items] | |
| 2019 (remaining) | 52 |
| 2020 | 65 |
| 2021 | 66 |
| 2022 | 68 |
| 2023 | 69 |
| Thereafter | 350 |
| Total | 670 |
| SOUTHERN Co GAS | |
| Lessor, Lease, Description [Line Items] | |
| 2019 (remaining) | 17 |
| 2020 | 35 |
| 2021 | 35 |
| 2022 | 34 |
| 2023 | 34 |
| Thereafter | 497 |
| Total | $ 652 |
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- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. No definition available.
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- Definition Amount of lease payments to be received by lessor for operating lease. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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- Definition Amount of lease payments to be received by lessor in fifth fiscal year following latest fiscal year for operating lease. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest statement of financial position date. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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- Definition Amount of lease payments to be received by lessor in fourth year following latest fiscal year for operating lease. Excludes interim and annual periods when interim periods are reported on rolling approach, from latest statement of financial position date. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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- Definition Amount of lease payments to be received by lessor in remainder of fiscal year following latest fiscal year for operating lease. Excludes interim and annual periods when interim periods are reported on rolling approach, from latest statement of financial position date. Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
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- Definition Amount of lease payments to be received by lessor after fifth fiscal year following latest statement of financial position date for operating lease. Excludes interim and annual periods when interim periods are reported on rolling approach, from latest statement of financial position date. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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- Definition Amount of lease payments to be received by lessor in third fiscal year following latest fiscal year for operating lease. Excludes interim and annual periods when interim periods are reported on rolling approach, from latest statement of financial position date. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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- Definition Amount of lease payments to be received by lessor in second fiscal year following latest fiscal year for operating lease. Excludes interim and annual periods when interim periods are reported on rolling approach, from latest statement of financial position date. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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