Income Taxes	6 Months Ended
Jun. 30, 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 United States Supreme Court was heard in February 2013. On May 20, 2013, the Supreme Court issued a unanimous decision in PPL's favor, holding that the U.K. Windfall Tax is a creditable tax for U.S. federal income tax purposes. On May 28, 2013, the Supreme Court denied the petition for certiorari filed by the Commissioner of Internal Revenue in Entergy's U.K. Windfall Tax case, allowing Entergy's favorable decision from the United States Court of Appeals for the Fifth Circuit to become final. 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 United States Supreme Court was heard in February 2013. On May 20, 2013, the Supreme Court issued a unanimous decision in PPL's favor, holding that the U.K. Windfall Tax is a creditable tax for U.S. federal income tax purposes. On May 28, 2013, the Supreme Court denied the petition for certiorari filed by the Commissioner of Internal Revenue in Entergy's U.K. Windfall Tax case, allowing Entergy's favorable decision from the United States Court of Appeals for the Fifth Circuit to become final. 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 United States Supreme Court was heard in February 2013. On May 20, 2013, the Supreme Court issued a unanimous decision in PPL's favor, holding that the U.K. Windfall Tax is a creditable tax for U.S. federal income tax purposes. On May 28, 2013, the Supreme Court denied the petition for certiorari filed by the Commissioner of Internal Revenue in Entergy's U.K. Windfall Tax case, allowing Entergy's favorable decision from the United States Court of Appeals for the Fifth Circuit to become final. 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 United States Supreme Court was heard in February 2013. On May 20, 2013, the Supreme Court issued a unanimous decision in PPL's favor, holding that the U.K. Windfall Tax is a creditable tax for U.S. federal income tax purposes. On May 28, 2013, the Supreme Court denied the petition for certiorari filed by the Commissioner of Internal Revenue in Entergy's U.K. Windfall Tax case, allowing Entergy's favorable decision from the United States Court of Appeals for the Fifth Circuit to become final. 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 United States Supreme Court was heard in February 2013. On May 20, 2013, the Supreme Court issued a unanimous decision in PPL's favor, holding that the U.K. Windfall Tax is a creditable tax for U.S. federal income tax purposes. On May 28, 2013, the Supreme Court denied the petition for certiorari filed by the Commissioner of Internal Revenue in Entergy's U.K. Windfall Tax case, allowing Entergy's favorable decision from the United States Court of Appeals for the Fifth Circuit to become final. 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 United States Supreme Court was heard in February 2013. On May 20, 2013, the Supreme Court issued a unanimous decision in PPL's favor, holding that the U.K. Windfall Tax is a creditable tax for U.S. federal income tax purposes. On May 28, 2013, the Supreme Court denied the petition for certiorari filed by the Commissioner of Internal Revenue in Entergy's U.K. Windfall Tax case, allowing Entergy's favorable decision from the United States Court of Appeals for the Fifth Circuit to become final. 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 United States Supreme Court was heard in February 2013. On May 20, 2013, the Supreme Court issued a unanimous decision in PPL's favor, holding that the U.K. Windfall Tax is a creditable tax for U.S. federal income tax purposes. On May 28, 2013, the Supreme Court denied the petition for certiorari filed by the Commissioner of Internal Revenue in Entergy's U.K. Windfall Tax case, allowing Entergy's favorable decision from the United States Court of Appeals for the Fifth Circuit to become final. 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 United States Supreme Court was heard in February 2013. On May 20, 2013, the Supreme Court issued a unanimous decision in PPL's favor, holding that the U.K. Windfall Tax is a creditable tax for U.S. federal income tax purposes. On May 28, 2013, the Supreme Court denied the petition for certiorari filed by the Commissioner of Internal Revenue in Entergy's U.K. Windfall Tax case, allowing Entergy's favorable decision from the United States Court of Appeals for the Fifth Circuit to become final. 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.

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 United States Supreme Court was heard in February 2013. On May 20, 2013, the Supreme Court issued a unanimous decision in PPL's favor, holding that the U.K. Windfall Tax is a creditable tax for U.S. federal income tax purposes. On May 28, 2013, the Supreme Court denied the petition for certiorari filed by the Commissioner of Internal Revenue in Entergy's U.K. Windfall Tax case, allowing Entergy's favorable decision from the United States Court of Appeals for the Fifth Circuit to become final.

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.

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 United States Supreme Court was heard in February 2013. On May 20, 2013, the Supreme Court issued a unanimous decision in PPL's favor, holding that the U.K. Windfall Tax is a creditable tax for U.S. federal income tax purposes. On May 28, 2013, the Supreme Court denied the petition for certiorari filed by the Commissioner of Internal Revenue in Entergy's U.K. Windfall Tax case, allowing Entergy's favorable decision from the United States Court of Appeals for the Fifth Circuit to become final.

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.

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 United States Supreme Court was heard in February 2013. On May 20, 2013, the Supreme Court issued a unanimous decision in PPL's favor, holding that the U.K. Windfall Tax is a creditable tax for U.S. federal income tax purposes. On May 28, 2013, the Supreme Court denied the petition for certiorari filed by the Commissioner of Internal Revenue in Entergy's U.K. Windfall Tax case, allowing Entergy's favorable decision from the United States Court of Appeals for the Fifth Circuit to become final.

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.

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 United States Supreme Court was heard in February 2013. On May 20, 2013, the Supreme Court issued a unanimous decision in PPL's favor, holding that the U.K. Windfall Tax is a creditable tax for U.S. federal income tax purposes. On May 28, 2013, the Supreme Court denied the petition for certiorari filed by the Commissioner of Internal Revenue in Entergy's U.K. Windfall Tax case, allowing Entergy's favorable decision from the United States Court of Appeals for the Fifth Circuit to become final.

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.

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 United States Supreme Court was heard in February 2013. On May 20, 2013, the Supreme Court issued a unanimous decision in PPL's favor, holding that the U.K. Windfall Tax is a creditable tax for U.S. federal income tax purposes. On May 28, 2013, the Supreme Court denied the petition for certiorari filed by the Commissioner of Internal Revenue in Entergy's U.K. Windfall Tax case, allowing Entergy's favorable decision from the United States Court of Appeals for the Fifth Circuit to become final.

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.

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 United States Supreme Court was heard in February 2013. On May 20, 2013, the Supreme Court issued a unanimous decision in PPL's favor, holding that the U.K. Windfall Tax is a creditable tax for U.S. federal income tax purposes. On May 28, 2013, the Supreme Court denied the petition for certiorari filed by the Commissioner of Internal Revenue in Entergy's U.K. Windfall Tax case, allowing Entergy's favorable decision from the United States Court of Appeals for the Fifth Circuit to become final.

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.

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 United States Supreme Court was heard in February 2013. On May 20, 2013, the Supreme Court issued a unanimous decision in PPL's favor, holding that the U.K. Windfall Tax is a creditable tax for U.S. federal income tax purposes. On May 28, 2013, the Supreme Court denied the petition for certiorari filed by the Commissioner of Internal Revenue in Entergy's U.K. Windfall Tax case, allowing Entergy's favorable decision from the United States Court of Appeals for the Fifth Circuit to become final.

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.

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 United States Supreme Court was heard in February 2013. On May 20, 2013, the Supreme Court issued a unanimous decision in PPL's favor, holding that the U.K. Windfall Tax is a creditable tax for U.S. federal income tax purposes. On May 28, 2013, the Supreme Court denied the petition for certiorari filed by the Commissioner of Internal Revenue in Entergy's U.K. Windfall Tax case, allowing Entergy's favorable decision from the United States Court of Appeals for the Fifth Circuit to become final.

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.