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Income Taxes	3 Months Ended
Income Taxes	Mar. 31, 2013
Income Taxes	NOTE 10. INCOME TAXES (Entergy Corporation, Entergy Arkansas, Entergy Gulf States Louisiana, Entergy Louisiana, Entergy Mississippi, Entergy New Orleans, Entergy Texas, and System Energy) See Income Tax Litigation, Income Tax Audits, and Other Tax Matters in Note 3 to the financial statements in the Form 10-K for a discussion of income tax proceedings, income tax audits, and other income tax matters involving Entergy. As discussed in the Form 10-K, oral argument in PPL's U.K. Windfall Tax case at the U.S. Supreme Court was heard in February 2013, and the U.S. Supreme Court's decision is pending. Also, in March 2013, Entergy Louisiana distributed to its parent, Entergy Louisiana Holdings, Inc., Louisiana income tax credits of $20.6 million which resulted in a decrease in Entergy Louisiana's member's equity account.
Entergy Arkansas [Member]
Income Taxes	NOTE 10. INCOME TAXES (Entergy Corporation, Entergy Arkansas, Entergy Gulf States Louisiana, Entergy Louisiana, Entergy Mississippi, Entergy New Orleans, Entergy Texas, and System Energy) See Income Tax Litigation, Income Tax Audits, and Other Tax Matters in Note 3 to the financial statements in the Form 10-K for a discussion of income tax proceedings, income tax audits, and other income tax matters involving Entergy. As discussed in the Form 10-K, oral argument in PPL's U.K. Windfall Tax case at the U.S. Supreme Court was heard in February 2013, and the U.S. Supreme Court's decision is pending. Also, in March 2013, Entergy Louisiana distributed to its parent, Entergy Louisiana Holdings, Inc., Louisiana income tax credits of $20.6 million which resulted in a decrease in Entergy Louisiana's member's equity account.
Entergy Gulf States Louisiana [Member]
Income Taxes	NOTE 10. INCOME TAXES (Entergy Corporation, Entergy Arkansas, Entergy Gulf States Louisiana, Entergy Louisiana, Entergy Mississippi, Entergy New Orleans, Entergy Texas, and System Energy) See Income Tax Litigation, Income Tax Audits, and Other Tax Matters in Note 3 to the financial statements in the Form 10-K for a discussion of income tax proceedings, income tax audits, and other income tax matters involving Entergy. As discussed in the Form 10-K, oral argument in PPL's U.K. Windfall Tax case at the U.S. Supreme Court was heard in February 2013, and the U.S. Supreme Court's decision is pending. Also, in March 2013, Entergy Louisiana distributed to its parent, Entergy Louisiana Holdings, Inc., Louisiana income tax credits of $20.6 million which resulted in a decrease in Entergy Louisiana's member's equity account.
Entergy Louisiana [Member]
Income Taxes	NOTE 10. INCOME TAXES (Entergy Corporation, Entergy Arkansas, Entergy Gulf States Louisiana, Entergy Louisiana, Entergy Mississippi, Entergy New Orleans, Entergy Texas, and System Energy) See Income Tax Litigation, Income Tax Audits, and Other Tax Matters in Note 3 to the financial statements in the Form 10-K for a discussion of income tax proceedings, income tax audits, and other income tax matters involving Entergy. As discussed in the Form 10-K, oral argument in PPL's U.K. Windfall Tax case at the U.S. Supreme Court was heard in February 2013, and the U.S. Supreme Court's decision is pending. Also, in March 2013, Entergy Louisiana distributed to its parent, Entergy Louisiana Holdings, Inc., Louisiana income tax credits of $20.6 million which resulted in a decrease in Entergy Louisiana's member's equity account.
Entergy Mississippi [Member]
Income Taxes	NOTE 10. INCOME TAXES (Entergy Corporation, Entergy Arkansas, Entergy Gulf States Louisiana, Entergy Louisiana, Entergy Mississippi, Entergy New Orleans, Entergy Texas, and System Energy) See Income Tax Litigation, Income Tax Audits, and Other Tax Matters in Note 3 to the financial statements in the Form 10-K for a discussion of income tax proceedings, income tax audits, and other income tax matters involving Entergy. As discussed in the Form 10-K, oral argument in PPL's U.K. Windfall Tax case at the U.S. Supreme Court was heard in February 2013, and the U.S. Supreme Court's decision is pending. Also, in March 2013, Entergy Louisiana distributed to its parent, Entergy Louisiana Holdings, Inc., Louisiana income tax credits of $20.6 million which resulted in a decrease in Entergy Louisiana's member's equity account.
Entergy New Orleans
Income Taxes	NOTE 10. INCOME TAXES (Entergy Corporation, Entergy Arkansas, Entergy Gulf States Louisiana, Entergy Louisiana, Entergy Mississippi, Entergy New Orleans, Entergy Texas, and System Energy) See Income Tax Litigation, Income Tax Audits, and Other Tax Matters in Note 3 to the financial statements in the Form 10-K for a discussion of income tax proceedings, income tax audits, and other income tax matters involving Entergy. As discussed in the Form 10-K, oral argument in PPL's U.K. Windfall Tax case at the U.S. Supreme Court was heard in February 2013, and the U.S. Supreme Court's decision is pending. Also, in March 2013, Entergy Louisiana distributed to its parent, Entergy Louisiana Holdings, Inc., Louisiana income tax credits of $20.6 million which resulted in a decrease in Entergy Louisiana's member's equity account.
Entergy Texas [Member]
Income Taxes	NOTE 10. INCOME TAXES (Entergy Corporation, Entergy Arkansas, Entergy Gulf States Louisiana, Entergy Louisiana, Entergy Mississippi, Entergy New Orleans, Entergy Texas, and System Energy) See Income Tax Litigation, Income Tax Audits, and Other Tax Matters in Note 3 to the financial statements in the Form 10-K for a discussion of income tax proceedings, income tax audits, and other income tax matters involving Entergy. As discussed in the Form 10-K, oral argument in PPL's U.K. Windfall Tax case at the U.S. Supreme Court was heard in February 2013, and the U.S. Supreme Court's decision is pending. Also, in March 2013, Entergy Louisiana distributed to its parent, Entergy Louisiana Holdings, Inc., Louisiana income tax credits of $20.6 million which resulted in a decrease in Entergy Louisiana's member's equity account.
System Energy [Member]
Income Taxes	NOTE 10. INCOME TAXES (Entergy Corporation, Entergy Arkansas, Entergy Gulf States Louisiana, Entergy Louisiana, Entergy Mississippi, Entergy New Orleans, Entergy Texas, and System Energy) See Income Tax Litigation, Income Tax Audits, and Other Tax Matters in Note 3 to the financial statements in the Form 10-K for a discussion of income tax proceedings, income tax audits, and other income tax matters involving Entergy. As discussed in the Form 10-K, oral argument in PPL's U.K. Windfall Tax case at the U.S. Supreme Court was heard in February 2013, and the U.S. Supreme Court's decision is pending. Also, in March 2013, Entergy Louisiana distributed to its parent, Entergy Louisiana Holdings, Inc., Louisiana income tax credits of $20.6 million which resulted in a decrease in Entergy Louisiana's member's equity account.

The entire disclosure for income taxes. Disclosures may include net deferred tax liability or asset recognized in an enterprise's statement of financial position, net change during the year in the total valuation allowance, approximate tax effect of each type of temporary difference and carryforward that gives rise to a significant portion of deferred tax liabilities and deferred tax assets, utilization of a tax carryback, and tax uncertainties information.

+ References

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-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

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+ Details