Revolving Credit Facilities, Lines Of Credit And Short-Term Borrowings (Book Value And The Fair Value Of Long-Term Debt) (Details) - USD ($) $ in Thousands	Jun. 30, 2015		Dec. 31, 2014
Short-term Debt [Line Items]
Long-term Debt, Fair Value	$ 12,963,574	[1],[2]	$ 13,607,242	[3],[4]
Long-term Debt, Book Value	12,886,819		13,399,484
Notes payable to power authority	81,000		80,000
Entergy Arkansas [Member]
Short-term Debt [Line Items]
Long-term Debt, Fair Value	2,501,634	[1],[2]	2,517,633	[3],[4]
Long-term Debt, Book Value	2,664,952		2,671,343
Long term DOE obligations	181,000		181,000
Entergy Gulf States Louisiana [Member]
Short-term Debt [Line Items]
Long-term Debt, Fair Value	1,722,029	[1],[2]	1,743,143	[3],[4]
Long-term Debt, Book Value	1,655,841		1,622,817
Entergy Louisiana [Member]
Short-term Debt [Line Items]
Long-term Debt, Fair Value	3,360,897	[1],[2]	3,447,404	[3],[4]
Long-term Debt, Book Value	3,331,389		3,356,579
Capital Lease Obligations	112,000		128,000
Entergy Mississippi [Member]
Short-term Debt [Line Items]
Long-term Debt, Fair Value	1,086,306	[1],[2]	1,102,741	[3],[4]
Long-term Debt, Book Value	1,058,900		1,058,838
Entergy New Orleans [Member]
Short-term Debt [Line Items]
Long-term Debt, Fair Value	224,803	[1],[2]	226,349	[3],[4]
Long-term Debt, Book Value	225,877		225,866
Entergy Texas [Member]
Short-term Debt [Line Items]
Long-term Debt, Fair Value	1,627,335	[1],[2]	1,629,124	[3],[4]
Long-term Debt, Book Value	1,493,432		1,478,931
System Energy [Member]
Short-term Debt [Line Items]
Long-term Debt, Fair Value	573,247	[1],[2]	677,475	[3],[4]
Long-term Debt, Book Value	604,533		710,806
Capital Lease Obligations	$ 39,000		$ 51,000

[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 $112 million at Entergy Louisiana and $39 million at System Energy, long-term DOE obligations of $181 million at Entergy Arkansas, and the note payable to NYPA of $81 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 $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 $80 million at Entergy, and include debt due within one year.