Summary Of Significant Accounting Policies (Schedule Of Earnings Per Share, Basic And Diluted) (Details) (USD $)	3 Months Ended								12 Months Ended
	Dec. 31, 2014	Sep. 30, 2014	Jun. 30, 2014	Mar. 31, 2014	Dec. 31, 2013	Sep. 30, 2013	Jun. 30, 2013	Mar. 31, 2013	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Basic earnings per share
Net income (loss) attributable to Entergy Corporation	$ 120,127,000	$ 230,037,000	$ 189,383,000	$ 401,174,000	$ 146,929,000	$ 239,850,000	$ 163,723,000	$ 161,400,000	$ 940,721,000	$ 711,902,000	$ 846,673,000
Net Income Attributable to Entergy Corporation, Shares									179,506,151	178,211,192	177,324,813
Basic earnings per share (in usd per share)	$ 0.67	$ 1.28	$ 1.06	$ 2.24	$ 0.82	$ 1.35	$ 0.92	$ 0.91	$ 5.24	$ 3.99	$ 4.77
Average dilutive effect of:
Diluted earnings per share, Shares									180,296,885	178,570,400	177,737,565
Diluted earnings per share (in usd per share)	$ 0.66	$ 1.27	$ 1.05	$ 2.24	$ 0.82	$ 1.34	$ 0.92	$ 0.90	$ 5.22	$ 3.99	$ 4.76
Parent Company [Member]
Basic earnings per share
Net income (loss) attributable to Entergy Corporation									940,700,000	711,900,000	846,700,000
Net Income Attributable to Entergy Corporation, Shares									179,500,000	178,200,000	177,300,000
Basic earnings per share (in usd per share)									$ 5.24	$ 3.99	$ 4.77
Average dilutive effect of:
Stock options, Shares									300,000	100,000	300,000
Stock options $/share									$ (0.01)	$ 0.00	$ (0.01)
Equity units, Income									$ 500,000	$ 300,000	$ 100,000
Average Dilutive Effect of Other Equity Plans Per Share									$ (0.01)
Diluted earnings per share, Shares									180,300,000	178,600,000	177,700,000
Diluted earnings per share (in usd per share)									$ 5.22	$ 3.99	$ 4.76