Revolving Credit Facilities, Lines Of Credit And Short-Term Borrowings (Book Value And The Fair Value Of Long-Term Debt) (Details) (USD $)	Sep. 30, 2014		Dec. 31, 2013
Short-term Debt [Line Items]
Long-term Debt, Fair Value	$ 12,872,518,000	[1],[2]	$ 12,439,785,000	[1],[3]
Long-term Debt, Book Value	12,748,708,000		12,596,244,000
Notes payable to power authority	97,000,000		95,000,000
Entergy Arkansas [Member]
Short-term Debt [Line Items]
Long-term Debt, Fair Value	2,244,612,000	[1],[2]	2,142,527,000	[1],[3]
Long-term Debt, Book Value	2,429,578,000		2,405,802,000
Long term DOE obligations	181,000,000		181,000,000
Entergy Gulf States Louisiana [Member]
Short-term Debt [Line Items]
Long-term Debt, Fair Value	1,746,041,000	[1],[2]	1,631,308,000	[1],[3]
Long-term Debt, Book Value	1,622,755,000		1,527,465,000
Entergy Louisiana [Member]
Short-term Debt [Line Items]
Long-term Debt, Fair Value	3,414,414,000	[1],[2]	3,148,877,000	[1],[3]
Long-term Debt, Book Value	3,368,934,000		3,219,516,000
Capital Lease Obligations	128,000,000		149,000,000
Entergy Mississippi [Member]
Short-term Debt [Line Items]
Long-term Debt, Fair Value	1,098,397,000	[1],[2]	1,067,006,000	[1],[3]
Long-term Debt, Book Value	1,058,806,000		1,053,670,000
Entergy New Orleans [Member]
Short-term Debt [Line Items]
Long-term Debt, Fair Value	226,115,000	[1],[2]	217,692,000	[1],[3]
Long-term Debt, Book Value	225,886,000		225,944,000
Entergy Texas [Member]
Short-term Debt [Line Items]
Long-term Debt, Fair Value	1,641,839,000	[1],[2]	1,726,623,000	[1],[3]
Long-term Debt, Book Value	1,490,216,000		1,556,939,000
System Energy [Member]
Short-term Debt [Line Items]
Long-term Debt, Fair Value	672,972,000	[1],[2]	664,890,000	[1],[3]
Long-term Debt, Book Value	710,777,000		757,436,000
Capital Lease Obligations	$ 51,000,000		$ 97,000,000

[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 $128 million at Entergy Louisiana and $51 million at System Energy, long-term DOE obligations of $181 million at Entergy Arkansas, and the note payable to NYPA of $97 million at Entergy, and include debt due within one year.

[3] The values exclude lease obligations of $149 million at Entergy Louisiana and $97 million at System Energy, long-term DOE obligations of $181 million at Entergy Arkansas, and the note payable to NYPA of $95 million at Entergy, and include debt due within one year.