Consolidated Statements Of Comprehensive Income (Parenthetical) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Cash flow hedges net unrealized gain (loss), tax expense (benefit)	$ (22,570)	$ (55,298)	$ 3,752
Pension and other postretirement liabilities, tax expense	(4,057)	(3,952)	61,576
Net unrealized investment gains, tax expense	80,069	57,277	(45,904)
Foreign currency translation, tax expense	(403)	(689)	(345)
Entergy Louisiana [Member]
Pension and other postretirement liabilities, tax expense	$ 234	$ 5,034	$ 14,316