Revolving Credit Facilities, Lines Of Credit, Short-Term Borrowings, And Long-Term Debt (Book Value And The Fair Value Of Long-Term Debt) (Details) - USD ($) $ in Thousands	Mar. 31, 2016		Dec. 31, 2015
Short-term Debt [Line Items]
Long-term Debt, Fair Value	$ 14,811,845	[1],[2]	$ 13,578,511	[3],[4]
Long-term Debt, Book Value	14,296,872		13,325,930
Notes payable to power authority	35,000		35,000
Entergy Arkansas [Member]
Short-term Debt [Line Items]
Long-term Debt, Fair Value	2,726,079	[1],[2]	2,498,108	[3],[4]
Long-term Debt, Book Value	2,777,649		2,629,839
Long term DOE obligations	181,000		181,000
Entergy Louisiana [Member]
Short-term Debt [Line Items]
Long-term Debt, Fair Value	5,967,996	[1],[2]	5,018,786	[3],[4]
Long-term Debt, Book Value	5,620,234		4,836,162
Capital Lease Obligations	56,000		109,000
Entergy Mississippi [Member]
Short-term Debt [Line Items]
Long-term Debt, Fair Value	1,100,469	[1],[2]	1,087,326	[3],[4]
Long-term Debt, Book Value	1,045,430		1,045,085
Entergy New Orleans [Member]
Short-term Debt [Line Items]
Long-term Debt, Fair Value	443,145	[1],[2]	351,040	[3],[4]
Long-term Debt, Book Value	449,892		342,880
Entergy Texas [Member]
Short-term Debt [Line Items]
Long-term Debt, Fair Value	1,702,601	[1],[2]	1,590,616	[3],[4]
Long-term Debt, Book Value	1,552,741		1,451,967
System Energy [Member]
Short-term Debt [Line Items]
Long-term Debt, Fair Value	550,080	[1],[2]	552,762	[3],[4]
Long-term Debt, Book Value	572,742		572,667
Capital Lease Obligations	$ 34,000		$ 34,000

[1] Fair values are classified as Level 2 in the fair value hierarchy discussed in Note 8 to the financial statements and are based on prices derived from inputs such as benchmark yields and reported trades.

[2] The values exclude lease obligations of $56 million at Entergy Louisiana and $34 million at System Energy, long-term DOE obligations of $181 million at Entergy Arkansas, and the note payable to NYPA of $35 million at Entergy, and include debt due within one year.

[3] Fair values are classified as Level 2 in the fair value hierarchy discussed in Note 8 to the financial statements and are based on prices derived from inputs such as benchmark yields and reported trades.

[4] The values exclude lease obligations of $109 million at Entergy Louisiana and $34 million at System Energy, long-term DOE obligations of $181 million at Entergy Arkansas, and the note payable to NYPA of $35 million at Entergy, and include debt due within one year.