Retirement And Other Postretirement Benefits (Expected Employer Contributions) (Details) (USD $) In Thousands, unless otherwise specified	9 Months Ended
	Sep. 30, 2014
Change in Plan Assets
Expected current year pension contributions	$ 399,000
Pension contributions made through Year To Date	320,000
Entergy Arkansas [Member]
Change in Plan Assets
Expected current year pension contributions	95,464
Pension contributions made through Year To Date	76,371
Remaining estimated pension contributions to be made in current year	19,093
Entergy Gulf States Louisiana [Member]
Change in Plan Assets
Expected current year pension contributions	30,176
Pension contributions made through Year To Date	24,217
Remaining estimated pension contributions to be made in current year	5,959
Entergy Louisiana [Member]
Change in Plan Assets
Expected current year pension contributions	54,549
Pension contributions made through Year To Date	43,475
Remaining estimated pension contributions to be made in current year	11,074
Entergy Mississippi [Member]
Change in Plan Assets
Expected current year pension contributions	21,839
Pension contributions made through Year To Date	17,455
Remaining estimated pension contributions to be made in current year	4,384
Entergy New Orleans [Member]
Change in Plan Assets
Expected current year pension contributions	10,509
Pension contributions made through Year To Date	8,408
Remaining estimated pension contributions to be made in current year	2,101
Entergy Texas [Member]
Change in Plan Assets
Expected current year pension contributions	17,072
Pension contributions made through Year To Date	13,793
Remaining estimated pension contributions to be made in current year	3,279
System Energy [Member]
Change in Plan Assets
Expected current year pension contributions	21,158
Pension contributions made through Year To Date	16,989
Remaining estimated pension contributions to be made in current year	$ 4,169