Summary of Significant Accounting Policies - Regulatory Assets and Liabilities (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended																																																																																																		12 Months Ended		0 Months Ended																													12 Months Ended												12 Months Ended																				12 Months Ended																																																																														12 Months Ended																																																										12 Months Ended																																																														0 Months Ended	12 Months Ended				12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2012 PPA charges [Member]		Dec. 31, 2011 PPA charges [Member]		Dec. 31, 2012 Asset retirement obligations-liability [Member]		Dec. 31, 2011 Asset retirement obligations-liability [Member]		Dec. 31, 2012 Other cost of removal obligations [Member]		Dec. 31, 2011 Other cost of removal obligations [Member]		Dec. 31, 2012 Deferred income tax credits [Member]		Dec. 31, 2011 Deferred income tax credits [Member]		Dec. 31, 2012 State income tax credits [Member]		Dec. 31, 2011 State income tax credits [Member]		Dec. 31, 2012 Over recovered regulatory clause revenues [Member]		Dec. 31, 2011 Over recovered regulatory clause revenues [Member]		Dec. 31, 2012 Property damage reserves [Member]		Dec. 31, 2011 Property damage reserves [Member]		Dec. 31, 2012 Fuel hedging-liability [Member]		Dec. 31, 2011 Fuel hedging-liability [Member]		Dec. 31, 2012 Environmental remediation-liability [Member]		Dec. 31, 2011 Environmental remediation-liability [Member]		Dec. 31, 2012 Other regulatory liabilities [Member]		Dec. 31, 2011 Other regulatory liabilities [Member]		Dec. 31, 2012 Canceled construction projects [Member]		Dec. 31, 2011 Canceled construction projects [Member]		Dec. 31, 2012 Deferred income tax charges [Member]		Dec. 31, 2011 Deferred income tax charges [Member]		Dec. 31, 2012 Deferred income tax charges - Medicare subsidy [Member]		Dec. 31, 2011 Deferred income tax charges - Medicare subsidy [Member]		Dec. 31, 2012 Asset retirement obligations-asset [Member]		Dec. 31, 2011 Asset retirement obligations-asset [Member]		Dec. 31, 2012 Loss on reacquired debt [Member]		Dec. 31, 2011 Loss on reacquired debt [Member]		Dec. 31, 2012 Vacation pay [Member]		Dec. 31, 2011 Vacation pay [Member]		Dec. 31, 2012 Under recovered regulatory clause revenues [Member]		Dec. 31, 2011 Under recovered regulatory clause revenues [Member]		Dec. 31, 2012 Building leases [Member]		Dec. 31, 2011 Building leases [Member]		Dec. 31, 2012 Generating plant outage costs [Member]		Dec. 31, 2011 Generating plant outage costs [Member]		Dec. 31, 2012 Under recovered storm damage costs [Member]		Dec. 31, 2011 Under recovered storm damage costs [Member]		Dec. 31, 2012 Fuel hedging-asset [Member]		Dec. 31, 2011 Fuel hedging-asset [Member]		Dec. 31, 2012 Other regulatory assets [Member]		Dec. 31, 2011 Other regulatory assets [Member]		Dec. 31, 2012 Environmental remediation-asset [Member]		Dec. 31, 2011 Environmental remediation-asset [Member]		Dec. 31, 2012 Retiree benefit plans [Member]		Dec. 31, 2011 Retiree benefit plans [Member]		Dec. 31, 2012 Mississippi Power [Member]	Dec. 31, 2011 Mississippi Power [Member]	Jan. 02, 2008 Mississippi Power [Member] Hurricane Katrina [Member]	Dec. 31, 2012 Mississippi Power [Member] Other cost of removal obligations [Member]		Dec. 31, 2011 Mississippi Power [Member] Other cost of removal obligations [Member]		Dec. 31, 2012 Mississippi Power [Member] Deferred income tax credits [Member]		Dec. 31, 2011 Mississippi Power [Member] Deferred income tax credits [Member]		Dec. 31, 2012 Mississippi Power [Member] Property damage reserves [Member]		Dec. 31, 2011 Mississippi Power [Member] Property damage reserves [Member]		Dec. 31, 2012 Mississippi Power [Member] Fuel hedging-liability [Member]		Dec. 31, 2011 Mississippi Power [Member] Fuel hedging-liability [Member]		Dec. 31, 2012 Mississippi Power [Member] Other regulatory liabilities [Member]		Dec. 31, 2011 Mississippi Power [Member] Other regulatory liabilities [Member]		Dec. 31, 2012 Mississippi Power [Member] Deferred income tax charges [Member]		Dec. 31, 2011 Mississippi Power [Member] Deferred income tax charges [Member]		Dec. 31, 2012 Mississippi Power [Member] Deferred income tax charges - Medicare subsidy [Member]		Dec. 31, 2011 Mississippi Power [Member] Deferred income tax charges - Medicare subsidy [Member]		Dec. 31, 2012 Mississippi Power [Member] Property tax [Member]		Dec. 31, 2011 Mississippi Power [Member] Property tax [Member]		Dec. 31, 2012 Mississippi Power [Member] Asset retirement obligations-asset [Member]		Dec. 31, 2011 Mississippi Power [Member] Asset retirement obligations-asset [Member]		Dec. 31, 2012 Mississippi Power [Member] Loss on reacquired debt [Member]		Dec. 31, 2011 Mississippi Power [Member] Loss on reacquired debt [Member]		Dec. 31, 2012 Mississippi Power [Member] Vacation pay [Member]		Dec. 31, 2011 Mississippi Power [Member] Vacation pay [Member]		Dec. 31, 2012 Mississippi Power [Member] Fuel hedging-asset [Member]		Dec. 31, 2011 Mississippi Power [Member] Fuel hedging-asset [Member]		Dec. 31, 2012 Mississippi Power [Member] Other regulatory assets [Member]		Dec. 31, 2011 Mississippi Power [Member] Other regulatory assets [Member]		Dec. 31, 2012 Mississippi Power [Member] Retiree benefit plans [Member]		Dec. 31, 2011 Mississippi Power [Member] Retiree benefit plans [Member]		Dec. 31, 2012 Mississippi Power [Member] Kemper IGCC [Member]		Dec. 31, 2011 Mississippi Power [Member] Kemper IGCC [Member]		Dec. 31, 2012 Gulf Power [Member]	Dec. 31, 2011 Gulf Power [Member]	Dec. 31, 2012 Gulf Power [Member] Asset retirement obligations-liability [Member]		Dec. 31, 2011 Gulf Power [Member] Asset retirement obligations-liability [Member]		Dec. 31, 2012 Gulf Power [Member] Other cost of removal obligations [Member]		Dec. 31, 2011 Gulf Power [Member] Other cost of removal obligations [Member]		Dec. 31, 2012 Gulf Power [Member] Deferred income tax credits [Member]		Dec. 31, 2011 Gulf Power [Member] Deferred income tax credits [Member]		Dec. 31, 2012 Gulf Power [Member] Over recovered regulatory clause revenues [Member]		Dec. 31, 2011 Gulf Power [Member] Over recovered regulatory clause revenues [Member]		Dec. 31, 2012 Gulf Power [Member] Property damage reserves [Member]		Dec. 31, 2011 Gulf Power [Member] Property damage reserves [Member]		Dec. 31, 2012 Gulf Power [Member] Fuel hedging-liability [Member]		Dec. 31, 2011 Gulf Power [Member] Fuel hedging-liability [Member]		Dec. 31, 2012 Gulf Power [Member] PPA credits [Member]		Dec. 31, 2011 Gulf Power [Member] PPA credits [Member]		Dec. 31, 2012 Gulf Power [Member] Other regulatory liabilities [Member]		Dec. 31, 2011 Gulf Power [Member] Other regulatory liabilities [Member]		Dec. 31, 2012 Gulf Power [Member] Deferred income tax charges [Member]		Dec. 31, 2011 Gulf Power [Member] Deferred income tax charges [Member]		Dec. 31, 2012 Gulf Power [Member] Deferred income tax charges - Medicare subsidy [Member]		Dec. 31, 2011 Gulf Power [Member] Deferred income tax charges - Medicare subsidy [Member]		Dec. 31, 2012 Gulf Power [Member] Loss on reacquired debt [Member]		Dec. 31, 2011 Gulf Power [Member] Loss on reacquired debt [Member]		Dec. 31, 2012 Gulf Power [Member] Vacation pay [Member]		Dec. 31, 2011 Gulf Power [Member] Vacation pay [Member]		Dec. 31, 2012 Gulf Power [Member] Under recovered regulatory clause revenues [Member]		Dec. 31, 2011 Gulf Power [Member] Under recovered regulatory clause revenues [Member]		Dec. 31, 2012 Gulf Power [Member] Fuel hedging-asset [Member]		Dec. 31, 2011 Gulf Power [Member] Fuel hedging-asset [Member]		Dec. 31, 2012 Gulf Power [Member] PPA charges [Member]		Dec. 31, 2011 Gulf Power [Member] PPA charges [Member]		Dec. 31, 2012 Gulf Power [Member] Generation site selection/evaluation costs [Member]		Dec. 31, 2011 Gulf Power [Member] Generation site selection/evaluation costs [Member]		Dec. 31, 2012 Gulf Power [Member] Other regulatory assets [Member]		Dec. 31, 2011 Gulf Power [Member] Other regulatory assets [Member]		Dec. 31, 2012 Gulf Power [Member] Environmental remediation-asset [Member]		Dec. 31, 2011 Gulf Power [Member] Environmental remediation-asset [Member]		Dec. 31, 2012 Gulf Power [Member] Retiree benefit plans [Member]		Dec. 31, 2011 Gulf Power [Member] Retiree benefit plans [Member]		Dec. 31, 2012 Georgia Power [Member]	Dec. 31, 2011 Georgia Power [Member]	Dec. 31, 2012 Georgia Power [Member] Other cost of removal obligations [Member]		Dec. 31, 2011 Georgia Power [Member] Other cost of removal obligations [Member]		Dec. 31, 2012 Georgia Power [Member] Deferred income tax credits [Member]		Dec. 31, 2011 Georgia Power [Member] Deferred income tax credits [Member]		Dec. 31, 2012 Georgia Power [Member] State income tax credits [Member]		Dec. 31, 2011 Georgia Power [Member] State income tax credits [Member]		Dec. 31, 2012 Georgia Power [Member] Other regulatory liabilities [Member]		Dec. 31, 2011 Georgia Power [Member] Other regulatory liabilities [Member]		Dec. 31, 2012 Georgia Power [Member] Deferred income tax charges [Member]		Dec. 31, 2011 Georgia Power [Member] Deferred income tax charges [Member]		Dec. 31, 2012 Georgia Power [Member] Deferred income tax charges - Medicare subsidy [Member]		Dec. 31, 2011 Georgia Power [Member] Deferred income tax charges - Medicare subsidy [Member]		Dec. 31, 2012 Georgia Power [Member] Asset retirement obligations-asset [Member]		Dec. 31, 2011 Georgia Power [Member] Asset retirement obligations-asset [Member]		Dec. 31, 2012 Georgia Power [Member] Loss on reacquired debt [Member]		Dec. 31, 2011 Georgia Power [Member] Loss on reacquired debt [Member]		Dec. 31, 2012 Georgia Power [Member] Vacation pay [Member]		Dec. 31, 2011 Georgia Power [Member] Vacation pay [Member]		Dec. 31, 2012 Georgia Power [Member] Building leases [Member]		Dec. 31, 2011 Georgia Power [Member] Building leases [Member]		Dec. 31, 2012 Georgia Power [Member] Canceled construction projects [Member]		Dec. 31, 2011 Georgia Power [Member] Canceled construction projects [Member]		Dec. 31, 2012 Georgia Power [Member] Fuel hedging-asset [Member]		Dec. 31, 2011 Georgia Power [Member] Fuel hedging-asset [Member]		Dec. 31, 2012 Georgia Power [Member] Other regulatory assets [Member]		Dec. 31, 2011 Georgia Power [Member] Other regulatory assets [Member]		Dec. 31, 2012 Georgia Power [Member] Retiree benefit plans [Member]		Dec. 31, 2011 Georgia Power [Member] Retiree benefit plans [Member]		Dec. 31, 2012 Alabama Power [Member]	Dec. 31, 2011 Alabama Power [Member]	Dec. 31, 2012 Alabama Power [Member] Asset retirement obligations-liability [Member]		Dec. 31, 2011 Alabama Power [Member] Asset retirement obligations-liability [Member]		Dec. 31, 2012 Alabama Power [Member] Other cost of removal obligations [Member]		Dec. 31, 2011 Alabama Power [Member] Other cost of removal obligations [Member]		Dec. 31, 2012 Alabama Power [Member] Deferred income tax credits [Member]		Dec. 31, 2011 Alabama Power [Member] Deferred income tax credits [Member]		Dec. 31, 2012 Alabama Power [Member] Fuel hedging-liability [Member]		Dec. 31, 2011 Alabama Power [Member] Fuel hedging-liability [Member]		Dec. 31, 2012 Alabama Power [Member] Mine reclamation and remediation [Member]		Dec. 31, 2011 Alabama Power [Member] Mine reclamation and remediation [Member]		Dec. 31, 2012 Alabama Power [Member] Nuclear outage [Member]		Dec. 31, 2011 Alabama Power [Member] Nuclear outage [Member]		Dec. 31, 2012 Alabama Power [Member] Nuclear disaster reserve [Member]		Dec. 31, 2011 Alabama Power [Member] Nuclear disaster reserve [Member]		Dec. 31, 2012 Alabama Power [Member] Other regulatory liabilities [Member]		Dec. 31, 2011 Alabama Power [Member] Other regulatory liabilities [Member]		Dec. 31, 2012 Alabama Power [Member] Retiree benefit plans [Member]		Dec. 31, 2011 Alabama Power [Member] Retiree benefit plans [Member]		Dec. 31, 2012 Alabama Power [Member] Deferred income tax charges [Member]		Dec. 31, 2011 Alabama Power [Member] Deferred income tax charges [Member]		Dec. 31, 2012 Alabama Power [Member] Loss on reacquired debt [Member]		Dec. 31, 2011 Alabama Power [Member] Loss on reacquired debt [Member]		Dec. 31, 2012 Alabama Power [Member] Vacation pay [Member]		Dec. 31, 2011 Alabama Power [Member] Vacation pay [Member]		Dec. 31, 2012 Alabama Power [Member] Under recovered regulatory clause revenues [Member]		Dec. 31, 2011 Alabama Power [Member] Under recovered regulatory clause revenues [Member]		Dec. 31, 2012 Alabama Power [Member] Fuel hedging-asset [Member]		Dec. 31, 2011 Alabama Power [Member] Fuel hedging-asset [Member]		Dec. 31, 2012 Alabama Power [Member] Other regulatory assets [Member]		Dec. 31, 2011 Alabama Power [Member] Other regulatory assets [Member]		Oct. 20, 2011 Plant Daniel Units 3 and 4 [Member] Mississippi Power [Member]	Dec. 31, 2012 Plant Daniel Units 3 and 4 [Member] Mississippi Power [Member]		Dec. 31, 2011 Plant Daniel Units 3 and 4 [Member] Mississippi Power [Member]		Dec. 31, 2012 Maximum [Member]	Dec. 31, 2012 Maximum [Member] Alabama Power [Member]
Schedule of Regulatory Assets and Liabilities [Line Items]
Amortization of Regulatory Asset, Vacation Pay	1 year																																																																																																																																													1 year																				1 year																																																																														1 year																																																										1 year
Power Purchase Agreement Period																																																																																																																																																																																																																																																																																																																																																																													14 years
Recovery and Amortization Periods for Regulatory Assets Liabilities Approved by PSCs																																																																																																			10 years																																																																																																																																																																																																																																																																						10 years				10 years	5 years
Amortization Period of Regulatory Assets and Liabilities																																																																																																			50 years		4 years																													12 months																																																																																																																																																																																																																																						10 years
Recovery and Amortization Periods for Regulatory Assets Liabilities Approved by FERC																																																																																																			5 years
Schedule of Regulatory Assets and Liabilities [Abstract]
Total assets (liabilities), net	$ 4,322,000	$ 3,865,000	$ 138,000	[1],[2]	$ 95,000	[1],[2]	$ (71,000)	[1],[3]	$ (42,000)	[1],[3]	$ (1,225,000)	[3]	$ (1,196,000)	[3]	$ (212,000)	[3]	$ (225,000)	[3]	$ (36,000)	[4]	$ (62,000)	[4]	$ (18,000)	[5]	$ (28,000)	[5]	$ (193,000)	[6]	$ (206,000)	[6]	$ (24,000)	[5]	$ (13,000)	[5]	$ (8,000)	[6]	$ (8,000)	[6]	$ (14,000)	[5],[7]	$ (30,000)	[5],[7]	$ 65,000	[8]	$ 12,000	[8]	$ 1,318,000	[3]	$ 1,293,000	[3]	$ 72,000	[9]	$ 77,000	[9]	$ 141,000	[1],[3]	$ 117,000	[1],[3]	$ 309,000	[10]	$ 285,000	[10]	$ 165,000	[1],[11]	$ 160,000	[1],[11]	$ 38,000	[5]	$ 50,000	[5]	$ 40,000	[12]	$ 43,000	[12]	$ 30,000	[13]	$ 38,000	[13]	$ 38,000	[5]	$ 43,000	[5]	$ 118,000	[5]	$ 249,000	[5]	$ 204,000	[5]	$ 183,000	[5]	$ 74,000	[1],[6]	$ 71,000	[1],[6]	$ 3,373,000	[1],[14]	$ 2,959,000	[1],[14]	$ 147,469	$ 75,795		$ (143,461)	[15]	$ (126,424)	[15]	$ (11,157)	[15]	$ (12,081)	[15]	$ (58,789)	[16]	$ (64,748)	[16]	$ (2,519)	[1],[17]	$ (162)	[1],[17]	$ 0	[18]	$ (693)	[18]	$ 68,175	[15]	$ 21,000	[15]	$ 4,868	[19]	$ 5,521	[19]	$ 27,882	[20]	$ 18,484	[20]	$ 9,353	[15]	$ 9,057	[15]	$ 9,815	[21]	$ 7,171	[21]	$ 9,635	[1],[11]	$ 9,128	[1],[11]	$ 20,906	[1],[17]	$ 54,103	[1],[17]	$ 2,035	[18]	$ 132	[18]	$ 162,293	[1],[22]	$ 130,678	[1],[22]	$ 36,047	[23]	$ 20,684	[23]	$ 171,985	$ 117,626	$ (5,793)	[1],[24]	$ (5,653)	[1],[24]	$ (213,413)	[24]	$ (214,598)	[24]	$ (6,515)	[24]	$ (8,113)	[24]	$ (17,092)	[25]	$ (27,950)	[25]	$ (31,956)	[26]	$ (30,473)	[26]	$ (4,358)	[1],[27]	$ (197)	[1],[27]	$ (7,502)	[1],[28]	$ (7,536)	[1],[28]	$ (534)	[26]	$ (798)	[26]	$ 46,788	[24]	$ 44,533	[24]	$ 3,678	[29]	$ 4,005	[29]	$ 16,400	[30]	$ 14,437	[30]	$ 9,238	[1],[11]	$ 8,973	[1],[11]	$ 3,523	[25]	$ 3,133	[25]	$ 29,038	[1],[27]	$ 43,071	[1],[27]	$ 137,568	[1],[28]	$ 94,986	[1],[28]	$ 1,344	[31]	$ 20,415	[31]	$ 9,690	[1],[25]	$ 1,675	[1],[25]	$ 60,452	[1],[32]	$ 61,625	[1],[32]	$ 141,429	[1],[22]	$ 116,091	[1],[22]	$ 2,471,000	$ 2,254,000	$ (94,000)	[33]	$ (141,000)	[33]	$ (115,000)	[33]	$ (122,000)	[33]	$ (36,000)	[34]	$ (62,000)	[34]	$ (13,000)	[10],[35]	$ (13,000)	[10],[35]	$ 695,000	[33]	$ 713,000	[33]	$ 43,000	[36]	$ 47,000	[36]	$ 131,000	[33],[37]	$ 108,000	[33],[37]	$ 190,000	[10]	$ 178,000	[10]	$ 85,000	[11],[37]	$ 82,000	[11],[37]	$ 40,000	[27]	$ 43,000	[27]	$ 65,000	[8]	$ 12,000	[8]	$ 49,000	[35]	$ 104,000	[35]	$ 100,000	[36]	$ 108,000	[36]	$ 1,331,000	[37],[38]	$ 1,197,000	[37],[38]	$ 703,000	$ 716,000	$ (64,000)	[39]	$ (35,000)	[39]	$ (759,000)	[39]	$ (703,000)	[39]	$ (79,000)	[39]	$ (83,000)	[39]	$ (5,000)	[40]	$ (1,000)	[40]	$ (8,000)	[41]	$ (8,000)	[41]	$ 33,000	[42]	$ 38,000	[42]	$ (103,000)	[43]	$ (110,000)	[43]	$ (5,000)	[42],[44]	$ (20,000)	[42],[44]	$ 911,000	[1],[14]	$ 822,000	[1],[14]	$ 525,000	[39],[45]	$ 532,000	[39],[45]	$ 93,000	[46]	$ 84,000	[46]	$ 61,000	[1],[11]	$ 59,000	[1],[11]	$ 34,000	[42]	$ 47,000	[42]	$ 18,000	[40]	$ 48,000	[40]	$ 51,000	[44],[47]	$ 46,000	[44],[47]		$ 12,386	[48]	$ 3,945	[48]

[1] Not earning a return as offset in rate base by a corresponding asset or liability.

[2] Recovered over the life of the power purchase agreement (PPA) for periods up to 14 years.

[3] Asset retirement and removal assets and liabilities are recorded, deferred income tax assets are recovered, and deferred income tax liabilities are amortized over the related property lives, which may range up to 65 years. Asset retirement and removal assets and liabilities will be settled and trued up following completion of the related activities. At December 31, 2012, other cost of removal obligations included $31 million that will be amortized during 2013 in accordance with an Alternate Rate Plan for Georgia Power for the years 2011 through 2013 (2010 ARP). See Note 3 under "Retail Regulatory Matters – Georgia Power – Rate Plans" for additional information.

[4] Additional tax benefits resulting from the Georgia state income tax credit settlement that are being amortized over a 21-month period that began in April 2012, in accordance with a Georgia PSC order.

[5] Recorded and recovered or amortized as approved or accepted by the appropriate state PSCs over periods generally not exceeding 10 years.

[6] Recovered as storm restoration and potential reliability-related expenses or environmental remediation expenses are incurred as approved by the appropriate state PSCs.

[7] Recovered and amortized as approved or accepted by the appropriate state PSC over the life of the contract.

[8] Costs associated with construction of environmental controls that will not be completed as a result of unit retirements and deferred in accordance with the 2010 ARP. Amortization is expected to begin January 1, 2014, subject to approval by the Georgia PSC.

[9] Recovered and amortized as approved by the appropriate state PSCs over periods not exceeding 15 years.

[10] Recovered over either the remaining life of the original issue or, if refinanced, over the life of the new issue, which may range up to 50 years.

[11] Recorded as earned by employees and recovered as paid, generally within one year. This includes both vacation and banked holiday pay.

[12] Recovered over the remaining lives of the buildings through 2026.

[13] Recovered over the respective operating cycles, which range from 18 months to 10 years. See "Property, Plant, and Equipment" herein for additional information.

[14] Recovered and amortized over the average remaining service period which may range up to 15 years. See Note 2 for additional information.

[15] Asset retirement and removal assets and liabilities and deferred income tax assets are recovered, and removal assets and deferred income tax liabilities are amortized over the related property lives, which may range up to 50 years. Asset retirement and removal assets and liabilities will be settled and trued up following completion of the related activities.

[16] For additional information, see Note 1 under "Provision for Property Damage" and Note 3 under "Retail Regulatory Matters – System Restoration Rider."

[17] Fuel hedging assets and liabilities are recorded over the life of the underlying hedged purchase contracts, which generally do not exceed two years. Upon final settlement, costs are recovered through the Energy Cost Management clause (ECM).

[18] Recorded and recovered as approved by the Mississippi PSC.

[19] Recovered and amortized over a 10-year period beginning in 2012, as approved by the Mississippi PSC for the retail portion and a five-year period for the wholesale portion, as approved by FERC.

[20] Recovered through the ad valorem tax adjustment clause over a 12-month period beginning in April of the following year.

[21] Recovered over the remaining life of the original issue or, if refinanced, over the life of the new issue, which may range up to 50 years.

[22] Recovered and amortized over the average remaining service period which may range up to 14 years. See Note 2 for additional information.

[23] For additional information, see Note 3 under "Integrated Coal Gasification Combined Cycle."

[24] Asset retirement and removal assets and liabilities are recorded, deferred income tax assets are recovered, and deferred income tax liabilities are amortized over the related property lives, which may range up to 65 years. Asset retirement and removal assets and liabilities will be settled and trued up following completion of the related activities.

[25] Recorded and recovered or amortized as approved by the Florida PSC, generally within one year.

[26] Recorded and recovered or amortized as approved by the Florida PSC.

[27] See Note 6 under "Capital Leases." Recovered over the remaining lives of the buildings through 2026.

[28] Recovered over the life of the PPA for periods up to 14 years.

[29] Recovered and amortized over periods not exceeding 14 years.

[30] Recovered over either the remaining life of the original issue or, if refinanced, over the life of the new issue, which may range up to 40 years.

[31] Deferred pursuant to Florida Statute while the Company continues to evaluate certain potential new generation projects.

[32] Recovered through the environmental cost recovery clause when the remediation is performed.

[33] Asset retirement and other cost of removal obligations and deferred income tax assets are recovered, and deferred income tax liabilities are amortized over the related property lives, which may range up to 65 years. Asset retirement and removal liabilities will be settled and trued up following completion of the related activities. At December 31, 2012, other cost of removal obligations included $31 million that will be amortized during 2013 in accordance with the Company's Alternate Rate Plan for the years 2011 through 2013 (2010 ARP). See Note 3 under "Retail Regulatory Matters – Rate Plans" for additional information.

[34] Additional tax benefits resulting from the Georgia state income tax credit settlement that are being amortized over a 21-month period that began in April 2012, in accordance with a Georgia PSC order. See Note 5 under "Current and Deferred Income Taxes" for additional information.

[35] Fuel hedging assets and liabilities are recorded over the life of the underlying hedged purchase contracts, which generally do not exceed three years. Upon final settlement, actual costs incurred are recovered through the Company's fuel cost recovery mechanism.

[36] Recorded and recovered or amortized as approved by the Georgia PSC over periods generally not exceeding 10 years.

[37] Not earning a return as offset in rate base by a corresponding asset or liability

[38] Recovered and amortized over the average remaining service period which may range up to 14 years. See Note 2 under "Pension Plans" and "Other Postretirement Benefits" for additional information.

[39] Asset retirement and removal assets and liabilities are recorded, deferred income tax assets are recovered, and deferred income tax liabilities are amortized over the related property lives, which may range up to 50 years. Asset retirement and removal assets and liabilities will be settled and trued up following completion of the related activities.

[40] Fuel hedging assets and liabilities are recorded over the life of the underlying hedged purchase contracts, which generally do not exceed three years. Upon final settlement, actual costs incurred are recovered through the energy cost recovery clause.

[41] Recorded as accepted by the Alabama PSC. Mine reclamation and remediation liabilities will be settled following completion of the related activities.

[42] Recorded and recovered or amortized as approved or accepted by the Alabama PSC over periods not exceeding five years.

[43] Utilized as storm restoration and potential reliability-related expenses are incurred, as approved by the Alabama PSC.

[44] Recovered and amortized as approved or accepted by the Alabama PSC over the life of the contract.

[45] Included in the deferred income tax charges is $21 million for the retiree Medicare drug subsidy, which is recovered and amortized, as approved by the Alabama PSC, over the average remaining service period which may range up to 15 years.

[46] Recovered over the remaining life of the original issue, which may range up to 50 years.

[47] Recorded as accepted by the Alabama PSC. Capitalized upon initialization of related construction projects, if applicable.

[48] Recovered and amortized over a 10-year period ending October 2021, as approved by the Mississippi PSC for the difference between the revenue requirement under the purchase option and the revenue requirement assuming operating lease accounting treatment for the extended term.