Consolidated Statements of Capitalization (Parenthetical) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016
Total long-term debt (annual interest requirement — $)	$ 1,800
Annual dividend requirement	$ 0
Common stock, par value per share (in dollars per share)	$ 5	$ 5
Common stock, shares authorized	1,500,000,000	1,500,000,000
Common stock, shares issued	1,000,000,000	991,000,000
Treasury shares	900,000	800,000
Redeemable Preferred Stock, $1 par value
Preferred Stock, Par or Stated Value Per Share (in dollars per share)	$ 1	$ 1
Redeemable cumulative preferred stock, shares authorized	28,000,000	28,000,000
Redeemable cumulative preferred stock, shares outstanding	0	2,000,000
Redeemable Preferred Stock, $1 par value | Cumulative Preferred Stock
Dividend rate, minimum	0.00%	5.83%
Redeemable Preferred Stock, $100 par or stated value
Preferred Stock, Par or Stated Value Per Share (in dollars per share)	$ 100	$ 100
Redeemable cumulative preferred stock, shares authorized	20,000,000	20,000,000
Redeemable cumulative preferred stock, shares outstanding	1,000,000	1,000,000
Redeemable Preferred Stock, $100 par or stated value | Cumulative Preferred Stock
Dividend rate, minimum	4.20%	4.20%
Dividend rate, maximum	5.44%	5.44%
Redeemable Preferred Stock, $25 stated value
Preferred Stock, Par or Stated Value Per Share (in dollars per share)	$ 0	$ 25
Preference Stock , $100 par or stated value
Dividend rate, minimum	0.00%	5.60%
Dividend rate, maximum	0.00%	6.50%
Preferred Stock, Par or Stated Value Per Share (in dollars per share)	$ 100	$ 100
Preference stock, shares outstanding	0	4,000,000
Preference Stock, $1 par value
Dividend rate, minimum	0.00%	6.45%
Dividend rate, maximum	0.00%	6.50%
Preferred Stock, Par or Stated Value Per Share (in dollars per share)	$ 1	$ 1
Preference stock, shares authorized	65,000,000	65,000,000
Preference stock, shares outstanding	0	8,000,000
Redeemable Preferred Stock
Annual dividend requirement	$ 16	$ 6
Noncumulative Preferred Stock
Dividend rate, minimum	0.00%	6.00%
Dividend rate, maximum	0.00%	6.13%
Preferred Stock, Par or Stated Value Per Share (in dollars per share)	$ 25	$ 25
Preference stock, shares authorized	60,000,000	60,000,000
Preference stock, shares outstanding	0	2,000,000
Maturity of Pollution Control Revenue Bonds 2019
Fixed stated interest rate of debt obligation	4.55%
Pollution Control Revenue Bonds Due 2021
Fixed stated interest rate of debt obligation	7.13%
Maturity Of First Mortgage Bonds Due 2019
Fixed stated interest rate of debt obligation	4.70%
Maturity Of Gas Facility Revenue Bonds Due 2022 to 2033
Fixed stated interest rate of debt obligation	1.71%
Affiliate trusts, variable rate, due 2042
Fixed stated interest rate of debt obligation	4.44%
Adjustable Rate Loans | Maturity of Long Term Senior Notes and Debt After Year Five
Fixed stated interest rate of debt obligation		3.75%
ALABAMA POWER CO
Total long-term debt (annual interest requirement — $)	$ 305
Annual dividend requirement	$ 25
Common stock, par value per share (in dollars per share)	$ 40	$ 40
Common stock, shares authorized	40,000,000	40,000,000
Common stock, shares outstanding	30,537,500	30,537,500
ALABAMA POWER CO | Redeemable Preferred Stock, $1 par value
Dividend rate, minimum	5.00%	5.83%
Preferred Stock, Par or Stated Value Per Share (in dollars per share)	$ 1	$ 1
Redeemable cumulative preferred stock, shares authorized	27,500,000	27,500,000
Redeemable cumulative preferred stock, shares outstanding	10,000,000	1,520,000
ALABAMA POWER CO | Redeemable Preferred Stock, $100 par or stated value
Preferred Stock, Par or Stated Value Per Share (in dollars per share)	$ 100	$ 100
Redeemable cumulative preferred stock, shares authorized	3,850,000	3,850,000
Redeemable cumulative preferred stock, shares outstanding	475,115	475,115
ALABAMA POWER CO | Redeemable Preferred Stock, $100 par or stated value | Cumulative Preferred Stock
Dividend rate, minimum	4.20%	4.20%
Dividend rate, maximum	4.92%	4.92%
ALABAMA POWER CO | Redeemable Preferred Stock, $25 stated value
Preferred Stock, Par or Stated Value Per Share (in dollars per share)	$ 25	$ 25
ALABAMA POWER CO | Preference Stock, $1 par value
Dividend rate, minimum	6.45%	6.45%
Dividend rate, maximum	6.50%	6.50%
Preferred Stock, Par or Stated Value Per Share (in dollars per share)	$ 1	$ 1
ALABAMA POWER CO | Redeemable Preferred Stock
Annual dividend requirement	$ 15
ALABAMA POWER CO | Noncumulative Preferred Stock
Preferred Stock, Par or Stated Value Per Share (in dollars per share)	$ 25	$ 25
Preference stock, shares authorized	40,000,000	40,000,000
Preference stock, shares outstanding	0	8,000,000
ALABAMA POWER CO | Affiliate trusts, variable rate, due 2042
Fixed stated interest rate of debt obligation	4.44%	4.44%
ALABAMA POWER CO | Maturity of Long Term Senior Notes and Debt 2019
Fixed stated interest rate of debt obligation	5.125%	5.125%
ALABAMA POWER CO | Maturity of Long Term Senior Notes and Debt 2020
Fixed stated interest rate of debt obligation	3.375%	3.375%
GEORGIA POWER CO
Fixed stated interest rate of debt obligation	2.00%
Total long-term debt (annual interest requirement — $)	$ 437
Common stock, shares authorized	20,000,000	20,000,000
Preference stock, shares outstanding	0
Common stock, shares outstanding	9,261,500	9,261,500
GEORGIA POWER CO | Noncumulative Preferred Stock, $25 par value
Preferred Stock, Par or Stated Value Per Share (in dollars per share)	$ 25	$ 25
Dividend rate	6.125%	6.125%
Preference stock, shares authorized	50,000,000	50,000,000
Preference stock, shares outstanding	1,800,000	1,800,000
GEORGIA POWER CO | Noncumulative Preferred Stock, $100 par value
Preferred Stock, Par or Stated Value Per Share (in dollars per share)	$ 100	$ 100
Dividend rate	6.50%	6.50%
Preference stock, shares authorized	15,000,000	15,000,000
Preference stock, shares outstanding	2,250,000	2,250,000
GEORGIA POWER CO | Maturity Of Pollution Control Bonds Variable Rate Due 2018
Fixed stated interest rate of debt obligation	1.84%
GEORGIA POWER CO | Maturity of Long Term Senior Notes And Debt 2017
Fixed stated interest rate of debt obligation	5.70%	5.70%
GEORGIA POWER CO | Maturity of Long Term Senior Notes and Debt 2019
Fixed stated interest rate of debt obligation	4.25%	4.25%
GEORGIA POWER CO | Maturity of Long Term Senior Notes and Debt 2020
Fixed stated interest rate of debt obligation	2.40%	2.40%
GEORGIA POWER CO | Maturity of Long Term Senior Notes and Debt 2022
Fixed stated interest rate of debt obligation	2.85%
GULF POWER CO
Total long-term debt (annual interest requirement — $)	$ 48
Common stock, shares authorized	20,000,000	20,000,000
Preference stock, shares authorized	20,000,000	20,000,000
Common stock, shares outstanding	7,392,717	5,642,717
GULF POWER CO | Redeemable Preferred Stock, $1 par value
Redeemable cumulative preferred stock, shares outstanding	0
GULF POWER CO | Redeemable Preferred Stock, $100 par or stated value
Redeemable cumulative preferred stock, shares authorized	0
GULF POWER CO | Preference Stock , $100 par or stated value
Preferred Stock, Par or Stated Value Per Share (in dollars per share)	$ 100	$ 100
Preference stock, shares outstanding	0	550,000
GULF POWER CO | Preference Stock Type Three
Preference stock, shares outstanding	0	450,000
GULF POWER CO | Preference Stock Type Four
Preference stock, shares outstanding	0	500,000
GULF POWER CO | Preference Stock, $1 par value
Preference stock, shares authorized	10,000,000	10,000,000
GULF POWER CO | Noncumulative Preferred Stock
Preference stock, shares outstanding	0
GULF POWER CO | Maturity of Pollution Control Bonds Period One [Member]
Fixed stated interest rate of debt obligation	2.10%
GULF POWER CO | Pollution control revenue bonds variable rate due 2022
Fixed stated interest rate of debt obligation	1.83%
GULF POWER CO | Maturity of Long Term Senior Notes and Debt 2020
Fixed stated interest rate of debt obligation	4.75%	4.75%
GULF POWER CO | Maturity of Long Term Senior Notes and Debt 2022
Fixed stated interest rate of debt obligation	3.10%
GULF POWER CO | 6.0% preference stock | Preference Stock , $100 par or stated value
Fixed stated interest rate of debt obligation	0.00%	6.00%
GULF POWER CO | 6.45% preference stock | Preference Stock , $100 par or stated value
Fixed stated interest rate of debt obligation	0.00%	6.45%
GULF POWER CO | 5.6% Preference Stock | Preference Stock , $100 par or stated value
Fixed stated interest rate of debt obligation	0.00%	5.60%
MISSISSIPPI POWER CO
Total long-term debt (annual interest requirement — $)	$ 86
Dividend rate, minimum	4.40%	4.40%
Dividend rate, maximum	5.25%	5.25%
Preferred Stock, Par or Stated Value Per Share (in dollars per share)	$ 100	$ 100
Redeemable cumulative preferred stock, shares authorized	1,244,139	1,244,139
Redeemable cumulative preferred stock, shares outstanding	334,210	334,210
Annual dividend requirement	$ 2
Common stock, shares authorized	1,130,000	1,130,000
Common stock, shares outstanding	1,121,000	1,121,000
MISSISSIPPI POWER CO | Maturity of Long Term Notes Payable Variable Rate Due 2018
Fixed stated interest rate of debt obligation	3.05%
MISSISSIPPI POWER CO | 2028
Fixed stated interest rate of debt obligation	5.15%	5.15%
MISSISSIPPI POWER CO | Plant Daniel revenue bonds (7.13%) due 2021
Fixed stated interest rate of debt obligation	7.13%	7.13%
MISSISSIPPI POWER CO | Maturity of Long Term Senior Notes and Debt In Last Twelve Months
Fixed stated interest rate of debt obligation	5.60%	5.60%
MISSISSIPPI POWER CO | Maturity of Long Term Senior Notes and Debt 2018
Fixed stated interest rate of debt obligation	1.63%	1.63%
MISSISSIPPI POWER CO | Maturity of Long Term Senior Notes and Debt 2020
Fixed stated interest rate of debt obligation	5.55%	5.55%
MISSISSIPPI POWER CO | Maturity of Long-Term Debt Payable to Parent Company
Fixed stated interest rate of debt obligation	2.27%	2.27%
SOUTHERN Co GAS
Total long-term debt (annual interest requirement — $)	$ 241
Common stock, par value per share (in dollars per share)	$ 0.01	$ 10,000.00
Common stock, shares authorized	100,000,000	100
Common stock, shares outstanding	100	100
SOUTHERN Co GAS | First Mortgage Bonds Due 2019
Fixed stated interest rate of debt obligation	4.70%
SOUTHERN Co GAS | Maturity Of Gas Facility Revenue Bonds Due 2022
Fixed stated interest rate of debt obligation	1.71%
SOUTHERN Co GAS | Maturity Of Gas Facility Revenue Bonds Due 2024 to 2033
Fixed stated interest rate of debt obligation	1.71%
SOUTHERN Co GAS | Maturity of Long Term Senior Notes and Debt In Last Twelve Months
Fixed stated interest rate of debt obligation	7.20%
SOUTHERN Co GAS | Maturity of Long Term Senior Notes and Debt 2018
Fixed stated interest rate of debt obligation	3.50%
SOUTHERN Co GAS | Maturity of Long Term Senior Notes and Debt 2019
Fixed stated interest rate of debt obligation	5.25%
Minimum | Maturity of Pollution Control Revenue Bonds 2022
Fixed stated interest rate of debt obligation	2.10%
Minimum | Maturity of Pollution Control Revenue Bonds 2023 through 2049
Fixed stated interest rate of debt obligation	1.15%
Minimum | Pollution Control Revenue Bonds Due 2017
Fixed stated interest rate of debt obligation	2.45%
Minimum | Pollution Control Revenue Bonds Due 2022 to 2053
Fixed stated interest rate of debt obligation	1.59%
Minimum | Pollution Control Revenue Bonds Due 2021
Fixed stated interest rate of debt obligation	1.86%
Minimum | First Mortgage Bonds Due 2023 to 2033
Fixed stated interest rate of debt obligation	2.66%
Minimum | Junior Subordinated Notes Due 2076
Fixed stated interest rate of debt obligation	5.00%
Minimum | Maturity of Long Term Senior Notes and Debt In Last Twelve Months
Fixed stated interest rate of debt obligation		1.30%
Minimum | Maturity of Long Term Senior Notes and Debt 2018
Fixed stated interest rate of debt obligation	1.50%
Minimum | Maturity of Long Term Senior Notes and Debt 2019
Fixed stated interest rate of debt obligation	1.85%
Minimum | Maturity of Long Term Senior Notes and Debt 2020
Fixed stated interest rate of debt obligation	2.00%
Minimum | Maturity of Long Term Senior Notes and Debt in 2021
Fixed stated interest rate of debt obligation	2.35%
Minimum | Maturity of Long Term Senior Notes and Debt 2022
Fixed stated interest rate of debt obligation	1.00%
Minimum | Maturity of Long Term Senior Notes and Debt After Year Five
Fixed stated interest rate of debt obligation	1.85%
Minimum | Maturity Of FFB Loans Due 2020
Fixed stated interest rate of debt obligation	2.57%	2.57%
Minimum | Maturity Of FFB Loans Due 2021
Fixed stated interest rate of debt obligation	2.57%	2.57%
Minimum | Maturity Of Loans Due Two Thousand Twenty Two
Fixed stated interest rate of debt obligation	2.57%	2.57%
Minimum | Maturity Of Loans Due Two Thousand Twenty Two To Two Thousand Forty Four [Member]
Fixed stated interest rate of debt obligation	2.57%	2.57%
Minimum | Adjustable Rate Loans | Maturity of Long Term Senior Notes and Debt In Last Twelve Months
Fixed stated interest rate of debt obligation		1.82%
Minimum | Adjustable Rate Loans | Maturity of Long Term Senior Notes and Debt 2018
Fixed stated interest rate of debt obligation	2.29%
Minimum | Adjustable Rate Loans | Maturity of Long Term Senior Notes and Debt 2020
Fixed stated interest rate of debt obligation	2.04%
Minimum | Adjustable Rate Loans | Maturity of Long Term Senior Notes and Debt in 2021
Fixed stated interest rate of debt obligation	2.55%
Minimum | ALABAMA POWER CO | Maturity of Long Term Senior Notes and Debt 2021-2045
Fixed stated interest rate of debt obligation	2.80%	2.80%
Minimum | ALABAMA POWER CO | Pollution control revenue bonds due 2034
Fixed stated interest rate of debt obligation	1.625%	1.625%
Minimum | ALABAMA POWER CO | Pollution Control Revenue Bonds Variable Rate Due 2024 - 2038
Fixed stated interest rate of debt obligation	1.70%	1.70%
Minimum | ALABAMA POWER CO | Maturity Of Pollution Control Bonds 2017
Fixed stated interest rate of debt obligation	0.77%	0.77%
Minimum | ALABAMA POWER CO | Maturity Of Pollution Control Bonds 2021
Fixed stated interest rate of debt obligation	1.86%	1.86%
Minimum | ALABAMA POWER CO | Maturity of Long Term Senior Notes And Debt 2017
Fixed stated interest rate of debt obligation	5.50%	5.50%
Minimum | ALABAMA POWER CO | Maturity of Long Term Senior Notes and Debt in 2021
Fixed stated interest rate of debt obligation	3.95%	3.95%
Minimum | ALABAMA POWER CO | Maturity of Long Term Senior Notes and Debt 2022
Fixed stated interest rate of debt obligation	5.875%
Minimum | ALABAMA POWER CO | Adjustable Rate Loans | Maturity of Long Term Senior Notes and Debt 2022
Fixed stated interest rate of debt obligation	2.55%	2.55%
Minimum | GEORGIA POWER CO | FFB Loans Due 2022 to 2044
Fixed stated interest rate of debt obligation	2.57%	2.57%
Minimum | GEORGIA POWER CO | Maturity of Long Term Senior Notes and Debt 2022 to 2043
Fixed stated interest rate of debt obligation	3.25%	2.85%
Minimum | GEORGIA POWER CO | Pollution control revenue bonds due 2022 - 2049
Fixed stated interest rate of debt obligation	1.38%	1.38%
Minimum | GEORGIA POWER CO | Maturity of Long Term Senior Notes and Debt 2018
Fixed stated interest rate of debt obligation	1.95%	1.95%
Minimum | GEORGIA POWER CO | Variable rate, Due 2022-2053
Fixed stated interest rate of debt obligation	1.59%
Minimum | GEORGIA POWER CO | Maturity Of FFB Loans Due 2020
Fixed stated interest rate of debt obligation	2.57%	2.57%
Minimum | GEORGIA POWER CO | Maturity Of FFB Loans Due 2021
Fixed stated interest rate of debt obligation	2.57%	2.57%
Minimum | GEORGIA POWER CO | Maturity Of Loans Due Two Thousand Twenty Two
Fixed stated interest rate of debt obligation	2.57%	2.57%
Minimum | GULF POWER CO | 2020-2051
Fixed stated interest rate of debt obligation	3.30%	3.10%
Minimum | GULF POWER CO | Pollution control revenue bonds due 2022 - 2049
Fixed stated interest rate of debt obligation	1.15%	1.15%
Minimum | GULF POWER CO | Pollution control revenue bonds due 2022-2042
Fixed stated interest rate of debt obligation	1.85%
Minimum | GULF POWER CO | Maturity of Long Term Senior Notes and Debt 2018
Fixed stated interest rate of debt obligation	2.93%	2.93%
Minimum | MISSISSIPPI POWER CO | Maturity of Long Term Senior Notes and Debt 2035 to 2042
Fixed stated interest rate of debt obligation	4.25%	1.63%
Minimum | MISSISSIPPI POWER CO | Maturity Of Pollution Control Bonds 2017
Fixed stated interest rate of debt obligation	2.45%	0.83%
Minimum | SOUTHERN Co GAS | First Mortgage Bonds Due 2023 to 2057
Fixed stated interest rate of debt obligation	2.66%
Minimum | SOUTHERN Co GAS | Maturity of Long Term Senior Notes and Debt in 2021
Fixed stated interest rate of debt obligation	3.50%
Minimum | SOUTHERN Co GAS | Maturity of Long Term Senior Notes and Debt 2022
Fixed stated interest rate of debt obligation	8.55%
Minimum | SOUTHERN Co GAS | Maturity of Long Term Senior Notes and Debt After Year Five
Fixed stated interest rate of debt obligation	2.45%
Maximum | Maturity of Pollution Control Revenue Bonds 2022
Fixed stated interest rate of debt obligation	2.35%
Maximum | Maturity of Pollution Control Revenue Bonds 2023 through 2049
Fixed stated interest rate of debt obligation	5.15%
Maximum | Pollution Control Revenue Bonds Due 2017
Fixed stated interest rate of debt obligation	2.50%
Maximum | Pollution Control Revenue Bonds Due 2022 to 2053
Fixed stated interest rate of debt obligation	1.88%
Maximum | Pollution Control Revenue Bonds Due 2021
Fixed stated interest rate of debt obligation	1.87%
Maximum | First Mortgage Bonds Due 2023 to 2033
Fixed stated interest rate of debt obligation	6.58%
Maximum | Junior Subordinated Notes Due 2076
Fixed stated interest rate of debt obligation	6.25%
Maximum | Maturity of Long Term Senior Notes and Debt In Last Twelve Months
Fixed stated interest rate of debt obligation		7.20%
Maximum | Maturity of Long Term Senior Notes and Debt 2018
Fixed stated interest rate of debt obligation	5.40%
Maximum | Maturity of Long Term Senior Notes and Debt 2019
Fixed stated interest rate of debt obligation	5.55%
Maximum | Maturity of Long Term Senior Notes and Debt 2020
Fixed stated interest rate of debt obligation	4.75%
Maximum | Maturity of Long Term Senior Notes and Debt in 2021
Fixed stated interest rate of debt obligation	9.10%
Maximum | Maturity of Long Term Senior Notes and Debt 2022
Fixed stated interest rate of debt obligation	8.70%
Maximum | Maturity of Long Term Senior Notes and Debt After Year Five
Fixed stated interest rate of debt obligation	7.30%
Maximum | Maturity Of FFB Loans Due 2020
Fixed stated interest rate of debt obligation	3.86%	3.86%
Maximum | Maturity Of FFB Loans Due 2021
Fixed stated interest rate of debt obligation	3.86%	3.86%
Maximum | Maturity Of Loans Due Two Thousand Twenty Two
Fixed stated interest rate of debt obligation	3.86%	3.86%
Maximum | Maturity Of Loans Due Two Thousand Twenty Two To Two Thousand Forty Four [Member]
Fixed stated interest rate of debt obligation	3.86%	3.86%
Maximum | Adjustable Rate Loans | Maturity of Long Term Senior Notes and Debt In Last Twelve Months
Fixed stated interest rate of debt obligation		3.75%
Maximum | Adjustable Rate Loans | Maturity of Long Term Senior Notes and Debt 2018
Fixed stated interest rate of debt obligation	3.05%
Maximum | Adjustable Rate Loans | Maturity of Long Term Senior Notes and Debt 2020
Fixed stated interest rate of debt obligation	2.18%
Maximum | Adjustable Rate Loans | Maturity of Long Term Senior Notes and Debt in 2021
Fixed stated interest rate of debt obligation	2.79%
Maximum | ALABAMA POWER CO | Maturity of Long Term Senior Notes and Debt 2021-2045
Fixed stated interest rate of debt obligation	6.125%	6.125%
Maximum | ALABAMA POWER CO | Pollution control revenue bonds due 2034
Fixed stated interest rate of debt obligation	1.85%	1.85%
Maximum | ALABAMA POWER CO | Pollution Control Revenue Bonds Variable Rate Due 2024 - 2038
Fixed stated interest rate of debt obligation	1.87%	1.87%
Maximum | ALABAMA POWER CO | Maturity Of Pollution Control Bonds 2017
Fixed stated interest rate of debt obligation	0.79%	0.79%
Maximum | ALABAMA POWER CO | Maturity Of Pollution Control Bonds 2021
Fixed stated interest rate of debt obligation	1.87%	0.86%
Maximum | ALABAMA POWER CO | Maturity of Long Term Senior Notes And Debt 2017
Fixed stated interest rate of debt obligation	5.55%	5.55%
Maximum | ALABAMA POWER CO | Maturity of Long Term Senior Notes and Debt in 2021
Fixed stated interest rate of debt obligation	2.38%	2.38%
Maximum | ALABAMA POWER CO | Maturity of Long Term Senior Notes and Debt 2022
Fixed stated interest rate of debt obligation	2.45%
Maximum | ALABAMA POWER CO | Adjustable Rate Loans | Maturity of Long Term Senior Notes and Debt 2022
Fixed stated interest rate of debt obligation	2.786%	2.786%
Maximum | GEORGIA POWER CO | FFB Loans Due 2022 to 2044
Fixed stated interest rate of debt obligation	3.86%	3.86%
Maximum | GEORGIA POWER CO | Maturity of Long Term Senior Notes and Debt 2022 to 2043
Fixed stated interest rate of debt obligation	5.95%	5.95%
Maximum | GEORGIA POWER CO | Pollution control revenue bonds due 2022 - 2049
Fixed stated interest rate of debt obligation	4.00%	4.00%
Maximum | GEORGIA POWER CO | Maturity of Long Term Senior Notes and Debt 2018
Fixed stated interest rate of debt obligation	5.40%	5.40%
Maximum | GEORGIA POWER CO | Variable rate, Due 2022-2053
Fixed stated interest rate of debt obligation	1.88%
Maximum | GEORGIA POWER CO | Maturity Of FFB Loans Due 2020
Fixed stated interest rate of debt obligation	3.86%	3.86%
Maximum | GEORGIA POWER CO | Maturity Of FFB Loans Due 2021
Fixed stated interest rate of debt obligation	3.86%	3.86%
Maximum | GEORGIA POWER CO | Maturity Of Loans Due Two Thousand Twenty Two
Fixed stated interest rate of debt obligation	3.86%	3.86%
Maximum | GULF POWER CO | 2020-2051
Fixed stated interest rate of debt obligation	5.10%	5.75%
Maximum | GULF POWER CO | Pollution control revenue bonds due 2022 - 2049
Fixed stated interest rate of debt obligation	4.45%	4.45%
Maximum | GULF POWER CO | Pollution control revenue bonds due 2022-2042
Fixed stated interest rate of debt obligation	1.88%
Maximum | GULF POWER CO | Maturity of Long Term Senior Notes and Debt 2018
Fixed stated interest rate of debt obligation	5.90%	5.90%
Maximum | MISSISSIPPI POWER CO | Maturity of Long Term Senior Notes and Debt 2035 to 2042
Fixed stated interest rate of debt obligation	5.40%	5.40%
Maximum | MISSISSIPPI POWER CO | Maturity Of Pollution Control Bonds 2017
Fixed stated interest rate of debt obligation	2.50%	0.87%
Maximum | SOUTHERN Co GAS | First Mortgage Bonds Due 2023 to 2057
Fixed stated interest rate of debt obligation	6.58%
Maximum | SOUTHERN Co GAS | Maturity of Long Term Senior Notes and Debt in 2021
Fixed stated interest rate of debt obligation	9.10%
Maximum | SOUTHERN Co GAS | Maturity of Long Term Senior Notes and Debt 2022
Fixed stated interest rate of debt obligation	8.70%
Maximum | SOUTHERN Co GAS | Maturity of Long Term Senior Notes and Debt After Year Five
Fixed stated interest rate of debt obligation	7.30%