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	Sep. 30, 2015		Dec. 31, 2014
Short-term Debt [Line Items]
Long-term Debt, Fair Value	$ 13,458,106	[1],[2]	$ 13,607,242	[3],[4]
Long-term Debt, Book Value	13,331,261		13,399,484
Notes payable to power authority	82,000		80,000
Entergy Arkansas [Member]
Short-term Debt [Line Items]
Long-term Debt, Fair Value	2,505,438	[1],[2]	2,517,633	[3],[4]
Long-term Debt, Book Value	2,665,002		2,671,343
Long term DOE obligations	181,000		181,000
Entergy Louisiana [Member]
Short-term Debt [Line Items]
Long-term Debt, Fair Value	3,387,481	[1],[2]	3,447,404	[3],[4]
Long-term Debt, Book Value	3,328,026		3,356,579
Capital Lease Obligations	109,000		128,000
Entergy Mississippi [Member]
Short-term Debt [Line Items]
Long-term Debt, Fair Value	1,100,438	[1],[2]	1,102,741	[3],[4]
Long-term Debt, Book Value	1,058,931		1,058,838
Entergy New Orleans [Member]
Short-term Debt [Line Items]
Long-term Debt, Fair Value	353,973	[1],[2]	308,665	[3],[4]
Long-term Debt, Book Value	350,077		308,182
Entergy Texas [Member]
Short-term Debt [Line Items]
Long-term Debt, Fair Value	1,609,771	[1],[2]	1,629,124	[3],[4]
Long-term Debt, Book Value	1,475,105		1,478,931
System Energy [Member]
Short-term Debt [Line Items]
Long-term Debt, Fair Value	578,226	[1],[2]	677,475	[3],[4]
Long-term Debt, Book Value	599,654		710,806
Capital Lease Obligations	$ 34,000		$ 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 $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 $82 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.