XML 1133 R66.htm IDEA: XBRL DOCUMENT v2.4.0.8
Income Taxes - Deferred Tax Assets and Liabilities (Details) (USD $)
Dec. 31, 2013
Dec. 31, 2012
Deferred tax liabilities -    
Total - deferred tax liabilities $ 10,420,000,000 $ 9,701,000,000
Deferred Tax Liabilities, Gross 13,995,000,000 13,619,000,000
Deferred tax assets -    
Total - deferred tax assets 3,624,000,000 3,972,000,000
Total deferred tax liabilities, net 3,575,000,000 3,918,000,000
Portion included in current assets/(liabilities), net 143,000,000 237,000,000
Valuation allowance (49,000,000) (54,000,000)
Accumulated deferred income taxes 10,563,000,000 9,938,000,000
Deferred State Tax Assets [Member]
    
Deferred tax assets -    
Total - deferred tax assets 77,000,000 68,000,000
Asset retirement obligations-asset [Member]
    
Deferred tax assets -    
Total - deferred tax assets 824,000,000 720,000,000
Kemper IGCC Loss [Member]
    
Deferred tax assets -    
Total - deferred tax assets 472,000,000 0
Unbilled revenues [Member]
    
Deferred tax assets -    
Total - deferred tax assets 116,000,000 101,000,000
Accelerated depreciation [Member]
    
Deferred tax liabilities -    
Deferred Tax Liabilities, Gross 9,710,000,000 9,022,000,000
Property basis differences [Member]
    
Deferred tax liabilities -    
Deferred Tax Liabilities, Gross 1,515,000,000 1,254,000,000
Leveraged lease basis differences [Member]
    
Deferred tax liabilities -    
Deferred Tax Liabilities, Gross 287,000,000 278,000,000
Employee benefit obligations [Member]
    
Deferred tax liabilities -    
Deferred Tax Liabilities, Gross 491,000,000 536,000,000
Deferred tax assets -    
Total - deferred tax assets 1,048,000,000 1,678,000,000
Regulatory assets associated with employee benefit obligations [Member]
    
Deferred tax liabilities -    
Deferred Tax Liabilities, Gross 705,000,000 988,000,000
Premium on reacquired debt [Member]
    
Deferred tax liabilities -    
Deferred Tax Liabilities, Gross 113,000,000 84,000,000
Regulatory assets associated with asset retirement obligations [Member]
    
Deferred tax liabilities -    
Deferred Tax Liabilities, Gross 824,000,000 1,108,000,000
Federal effect of state deferred taxes [Member]
    
Deferred tax assets -    
Total - deferred tax assets 421,000,000 394,000,000
Other deferred tax liabilities [Member]
    
Deferred tax liabilities -    
Deferred Tax Liabilities, Gross 350,000,000 349,000,000
Over recovered fuel clause [Member]
    
Deferred tax assets -    
Total - deferred tax assets 30,000,000 135,000,000
Other property basis differences [Member]
    
Deferred tax assets -    
Total - deferred tax assets 157,000,000 134,000,000
Deferred costs [Member]
    
Deferred tax assets -    
Total - deferred tax assets 84,000,000 39,000,000
Tax credit carryforward [Member]
    
Deferred tax assets -    
Total - deferred tax assets 121,000,000 256,000,000
Other Comprehensive Income Losses [Member]
    
Deferred tax assets -    
Total - deferred tax assets 54,000,000 84,000,000
Other deferred tax assets [Member]
    
Deferred tax assets -    
Total - deferred tax assets 220,000,000 363,000,000
Alabama Power [Member]
    
Deferred tax liabilities -    
Total - deferred tax liabilities 3,578,000,000 3,379,000,000
Deferred Tax Liabilities, Gross 4,516,000,000 4,419,000,000
Deferred tax assets -    
Total - deferred tax assets 938,000,000 1,040,000,000
Portion included in current assets/(liabilities), net 25,000,000 25,000,000
Accumulated deferred income taxes 3,603,000,000 3,404,000,000
Alabama Power [Member] | Accelerated depreciation [Member]
    
Deferred tax liabilities -    
Deferred Tax Liabilities, Gross 3,187,000,000 2,989,000,000
Alabama Power [Member] | Property basis differences [Member]
    
Deferred tax liabilities -    
Deferred Tax Liabilities, Gross 458,000,000 420,000,000
Alabama Power [Member] | Leveraged lease basis differences [Member]
    
Deferred tax liabilities -    
Deferred Tax Liabilities, Gross 33,000,000 36,000,000
Alabama Power [Member] | Employee benefit obligations [Member]
    
Deferred tax liabilities -    
Deferred Tax Liabilities, Gross 209,000,000 218,000,000
Deferred tax assets -    
Total - deferred tax assets 231,000,000 408,000,000
Alabama Power [Member] | Regulatory assets associated with employee benefit obligations [Member]
    
Deferred tax liabilities -    
Deferred Tax Liabilities, Gross 198,000,000 378,000,000
Alabama Power [Member] | Under recovered fuel clause [Member]
    
Deferred tax liabilities -    
Deferred Tax Liabilities, Gross 0 16,000,000
Alabama Power [Member] | Asset retirement obligation [Member]
    
Deferred tax liabilities -    
Deferred Tax Liabilities, Gross 38,000,000 0
Deferred tax assets -    
Total - deferred tax assets 303,000,000 248,000,000
Alabama Power [Member] | Regulatory assets associated with asset retirement obligations [Member]
    
Deferred tax liabilities -    
Deferred Tax Liabilities, Gross 265,000,000 248,000,000
Alabama Power [Member] | Federal effect of state deferred taxes [Member]
    
Deferred tax assets -    
Total - deferred tax assets 205,000,000 194,000,000
Alabama Power [Member] | Other deferred tax liabilities [Member]
    
Deferred tax liabilities -    
Deferred Tax Liabilities, Gross 128,000,000 114,000,000
Alabama Power [Member] | Unbilled revenues [Member]
    
Deferred tax assets -    
Total - deferred tax assets 41,000,000 39,000,000
Alabama Power [Member] | Storm reserve [Member]
    
Deferred tax assets -    
Total - deferred tax assets 32,000,000 34,000,000
Alabama Power [Member] | Other Comprehensive Income Losses [Member]
    
Deferred tax assets -    
Total - deferred tax assets 18,000,000 19,000,000
Alabama Power [Member] | Other deferred tax assets [Member]
    
Deferred tax assets -    
Total - deferred tax assets 108,000,000 98,000,000
Georgia Power [Member]
    
Deferred tax liabilities -    
Total - deferred tax liabilities 5,132,000,000 4,709,000,000
Deferred Tax Liabilities, Gross 6,596,000,000 6,365,000,000
Deferred tax assets -    
Total - deferred tax assets 1,464,000,000 1,656,000,000
Portion included in current assets/(liabilities), net 68,000,000 152,000,000
Accumulated deferred income taxes 5,200,000,000 4,861,000,000
Georgia Power [Member] | Accelerated depreciation [Member]
    
Deferred tax liabilities -    
Deferred Tax Liabilities, Gross 4,479,000,000 4,201,000,000
Georgia Power [Member] | Property basis differences [Member]
    
Deferred tax liabilities -    
Deferred Tax Liabilities, Gross 873,000,000 757,000,000
Georgia Power [Member] | Employee benefit obligations [Member]
    
Deferred tax liabilities -    
Deferred Tax Liabilities, Gross 232,000,000 255,000,000
Deferred tax assets -    
Total - deferred tax assets 388,000,000 644,000,000
Georgia Power [Member] | Regulatory assets associated with employee benefit obligations [Member]
    
Deferred tax liabilities -    
Deferred Tax Liabilities, Gross 276,000,000 536,000,000
Georgia Power [Member] | Premium on reacquired debt [Member]
    
Deferred tax liabilities -    
Deferred Tax Liabilities, Gross 73,000,000 77,000,000
Georgia Power [Member] | Regulatory assets associated with asset retirement obligations [Member]
    
Deferred tax liabilities -    
Deferred Tax Liabilities, Gross 495,000,000 446,000,000
Deferred tax assets -    
Total - deferred tax assets 495,000,000 446,000,000
Georgia Power [Member] | Federal effect of state deferred taxes [Member]
    
Deferred tax assets -    
Total - deferred tax assets 159,000,000 142,000,000
Georgia Power [Member] | Other deferred tax liabilities [Member]
    
Deferred tax liabilities -    
Deferred Tax Liabilities, Gross 168,000,000 93,000,000
Georgia Power [Member] | Unbilled revenues [Member]
    
Deferred tax assets -    
Total - deferred tax assets 53,000,000 39,000,000
Georgia Power [Member] | Over recovered fuel clause [Member]
    
Deferred tax assets -    
Total - deferred tax assets 22,000,000 89,000,000
Georgia Power [Member] | Other property basis differences [Member]
    
Deferred tax assets -    
Total - deferred tax assets 93,000,000 100,000,000
Georgia Power [Member] | Deferred costs [Member]
    
Deferred tax assets -    
Total - deferred tax assets 84,000,000 39,000,000
Georgia Power [Member] | Cost of removal [Member]
    
Deferred tax assets -    
Total - deferred tax assets 17,000,000 29,000,000
Georgia Power [Member] | Tax credit carryforward [Member]
    
Deferred tax assets -    
Total - deferred tax assets 118,000,000 86,000,000
Georgia Power [Member] | Federal Tax Credit Carryforward [Member]
    
Deferred tax assets -    
Total - deferred tax assets 3,000,000 0
Georgia Power [Member] | Other deferred tax assets [Member]
    
Deferred tax assets -    
Total - deferred tax assets 32,000,000 42,000,000
Gulf Power [Member]
    
Deferred tax liabilities -    
Total - deferred tax liabilities 725,974,000 646,980,000
Deferred Tax Liabilities, Gross 858,980,000 804,881,000
Deferred tax assets -    
Total - deferred tax assets 133,006,000 157,901,000
Portion included in current assets/(liabilities), net 8,381,000 1,972,000
Accumulated deferred income taxes 734,355,000 648,952,000
Gulf Power [Member] | Accelerated depreciation [Member]
    
Deferred tax liabilities -    
Deferred Tax Liabilities, Gross 721,087,000 696,502,000
Gulf Power [Member] | Property basis differences [Member]
    
Deferred tax liabilities -    
Deferred Tax Liabilities, Gross 45,960,000 0
Gulf Power [Member] | Employee benefit obligations [Member]
    
Deferred tax liabilities -    
Deferred Tax Liabilities, Gross 25,800,000 28,579,000
Gulf Power [Member] | Pension and other employee benefits [Member]
    
Deferred tax assets -    
Total - deferred tax assets 33,015,000 61,939,000
Gulf Power [Member] | Regulatory assets associated with employee benefit obligations [Member]
    
Deferred tax liabilities -    
Deferred Tax Liabilities, Gross 27,660,000 57,279,000
Gulf Power [Member] | Fuel Recovery Clause [Member]
    
Deferred tax liabilities -    
Deferred Tax Liabilities, Gross 7,972,000 0
Gulf Power [Member] | Asset retirement obligation [Member]
    
Deferred tax assets -    
Total - deferred tax assets 6,554,000 6,502,000
Gulf Power [Member] | Regulatory assets associated with asset retirement obligations [Member]
    
Deferred tax liabilities -    
Deferred Tax Liabilities, Gross 6,554,000 6,502,000
Gulf Power [Member] | Federal effect of state deferred taxes [Member]
    
Deferred tax assets -    
Total - deferred tax assets 24,277,000 20,656,000
Gulf Power [Member] | Other deferred tax liabilities [Member]
    
Deferred tax liabilities -    
Deferred Tax Liabilities, Gross 23,947,000 16,019,000
Gulf Power [Member] | Other Postretirement Benefits [Member]
    
Deferred tax assets -    
Total - deferred tax assets 17,816,000 17,905,000
Gulf Power [Member] | Over recovered fuel clause [Member]
    
Deferred tax assets -    
Total - deferred tax assets 0 6,922,000
Gulf Power [Member] | Other property basis differences [Member]
    
Deferred tax assets -    
Total - deferred tax assets 0 23,549,000
Gulf Power [Member] | Tax credit carryforward [Member]
    
Deferred tax assets -    
Total - deferred tax assets 18,420,000 938,000
Gulf Power [Member] | Property reserve [Member]
    
Deferred tax assets -    
Total - deferred tax assets 15,144,000 13,773,000
Gulf Power [Member] | Other Comprehensive Income Losses [Member]
    
Deferred tax assets -    
Total - deferred tax assets 696,000 993,000
Gulf Power [Member] | Other deferred tax assets [Member]
    
Deferred tax assets -    
Total - deferred tax assets 17,084,000 4,724,000
Mississippi Power [Member]
    
Deferred tax liabilities -    
Total - deferred tax liabilities 57,182,000 209,143,000
Deferred Tax Liabilities, Gross 730,649,000 658,814,000
Deferred tax assets -    
Total - deferred tax assets 673,467,000 449,671,000
Portion included in current assets/(liabilities), net 15,626,000 35,815,000
Accumulated deferred income taxes 72,808,000 244,958,000
Mississippi Power [Member] | Accelerated depreciation [Member]
    
Deferred tax liabilities -    
Deferred Tax Liabilities, Gross 371,553,000 385,899,000
Mississippi Power [Member] | Property basis differences [Member]
    
Deferred tax liabilities -    
Deferred Tax Liabilities, Gross 130,679,000 72,451,000
Mississippi Power [Member] | Pension and other employee benefits [Member]
    
Deferred tax liabilities -    
Deferred Tax Liabilities, Gross 23,769,000 33,756,000
Deferred tax assets -    
Total - deferred tax assets 57,999,000 87,416,000
Mississippi Power [Member] | Regulatory assets associated with employee benefit obligations [Member]
    
Deferred tax liabilities -    
Deferred Tax Liabilities, Gross 33,127,000 68,717,000
Mississippi Power [Member] | Regulatory assets associated with Kemper IGCC [Member]
    
Deferred tax liabilities -    
Deferred Tax Liabilities, Gross 30,708,000 10,492,000
Mississippi Power [Member] | Under recovered fuel clause [Member]
    
Deferred tax liabilities -    
Deferred Tax Liabilities, Gross 1,777,000 9,492,000
Mississippi Power [Member] | Asset retirement obligation [Member]
    
Deferred tax assets -    
Total - deferred tax assets 16,764,000 16,851,000
Mississippi Power [Member] | Regulatory assets associated with asset retirement obligations [Member]
    
Deferred tax liabilities -    
Deferred Tax Liabilities, Gross 16,764,000 16,851,000
Mississippi Power [Member] | Long-term service agreement [Member]
    
Deferred tax assets -    
Total - deferred tax assets 0 5,544,000
Mississippi Power [Member] | Rate Differential [Member]
    
Deferred tax liabilities -    
Deferred Tax Liabilities, Gross 56,074,000 27,270,000
Mississippi Power [Member] | Federal effect of state deferred taxes [Member]
    
Deferred tax liabilities -    
Deferred Tax Liabilities, Gross 30,615,000 0
Deferred tax assets -    
Total - deferred tax assets 0 7,732,000
Mississippi Power [Member] | Other deferred tax liabilities [Member]
    
Deferred tax liabilities -    
Deferred Tax Liabilities, Gross 35,583,000 33,886,000
Mississippi Power [Member] | Property insurance [Member]
    
Deferred tax assets -    
Total - deferred tax assets 23,693,000 23,171,000
Mississippi Power [Member] | Premium on long-term debt [Member]
    
Deferred tax assets -    
Total - deferred tax assets 23,736,000 26,778,000
Mississippi Power [Member] | Unbilled revenues [Member]
    
Deferred tax assets -    
Total - deferred tax assets 12,136,000 11,642,000
Mississippi Power [Member] | Over recovered fuel clause [Member]
    
Deferred tax assets -    
Total - deferred tax assets 7,741,000 38,955,000
Mississippi Power [Member] | Kemper IGCC Loss [Member]
    
Deferred tax assets -    
Total - deferred tax assets 472,000,000 31,200,000
Mississippi Power [Member] | Interest rate hedges [Member]
    
Deferred tax assets -    
Total - deferred tax assets 5,094,000 5,644,000
Mississippi Power [Member] | Investment tax credit carryforward [Member]
    
Deferred tax assets -    
Total - deferred tax assets 0 170,938,000
Mississippi Power [Member] | Kemper Rate Factor - Regulatory Liability Retail [Member]
    
Deferred tax assets -    
Total - deferred tax assets 36,210,000 0
Mississippi Power [Member] | Other deferred tax assets [Member]
    
Deferred tax assets -    
Total - deferred tax assets 18,094,000 23,800,000
Southern Power [Member]
    
Deferred tax liabilities -    
Total - deferred tax liabilities 724,200,000 550,500,000
Deferred Tax Liabilities, Gross 844,400,000 636,000,000
Deferred tax assets -    
Total - deferred tax assets 127,700,000 91,700,000
Total deferred tax liabilities, net 120,200,000 85,500,000
Portion included in current assets/(liabilities), net 200,000 200,000
Valuation allowance (7,500,000) (6,200,000)
Accumulated deferred income taxes 724,390,000 550,685,000
Southern Power [Member] | Accelerated depreciation and other property basis differences [Member]
    
Deferred tax liabilities -    
Deferred Tax Liabilities, Gross 829,500,000 632,900,000
Southern Power [Member] | Federal effect of state deferred taxes [Member]
    
Deferred tax assets -    
Total - deferred tax assets 29,700,000 25,200,000
Southern Power [Member] | Levelized capacity revenues [Member]
    
Deferred tax liabilities -    
Deferred Tax Liabilities, Gross 11,200,000 0
Deferred tax assets -    
Total - deferred tax assets 6,000,000 4,500,000
Southern Power [Member] | State Net Operating Loss [Member]
    
Deferred tax assets -    
Total - deferred tax assets 17,000,000 8,300,000
Southern Power [Member] | Other deferred tax liabilities [Member]
    
Deferred tax liabilities -    
Deferred Tax Liabilities, Gross 900,000 0
Southern Power [Member] | Other property basis differences [Member]
    
Deferred tax liabilities -    
Deferred Tax Liabilities, Gross 2,800,000 3,100,000
Deferred tax assets -    
Total - deferred tax assets 2,900,000 3,900,000
Southern Power [Member] | Tax credit carryforward [Member]
    
Deferred tax assets -    
Total - deferred tax assets 1,100,000 1,100,000
Southern Power [Member] | Investment tax credit carryforward [Member]
    
Deferred tax assets -    
Total - deferred tax assets 58,000,000 28,600,000
Southern Power [Member] | Unrealized Loss [Member]
    
Deferred tax assets -    
Total - deferred tax assets 11,200,000 15,700,000
Southern Power [Member] | Other deferred tax assets [Member]
    
Deferred tax assets -    
Total - deferred tax assets $ 1,800,000 $ 4,400,000