Preferred Equity (Narratives) (Details) - USD ($)	1 Months Ended			12 Months Ended
	Nov. 30, 2017	Oct. 31, 2015	Dec. 31, 2013	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Preferred Equity [Line Items]
Payments for Repurchase of Preferred Stock and Preference Stock				$ 20,599,000	$ 115,283,000	$ 94,285,000
Entergy Arkansas [Member]
Preferred Equity [Line Items]
Payments for Repurchase of Preferred Stock and Preference Stock				0	85,283,000	0
Entergy Louisiana [Member]
Preferred Equity [Line Items]
Payments for Repurchase of Preferred Stock and Preference Stock				0	0	110,286,000
Entergy Mississippi [Member]
Preferred Equity [Line Items]
Payments for Repurchase of Preferred Stock and Preference Stock				0	30,000,000	0
Entergy New Orleans [Member]
Preferred Equity [Line Items]
Payments for Repurchase of Preferred Stock and Preference Stock				$ 20,599,000	$ 0	$ 0
Preferred Stock, 8.75% Rate [Member] | Entergy Finance Holding Inc [Member]
Preferred Equity [Line Items]
Preferred stock/preferred membership interests rate			8.75%	8.75%
Temporary Equity, Shares Issued			250,000
Temporary Equity, Par Value			$ 100
Temporary Equity, Redemption Price Per Share				$ 100
Adjustments to Additional Paid in Capital, Stock Issued, Issuance Costs				$ 751,000
Preferred Stock, Cumulative $100 Par Value, 4.36% Series [Member] | Entergy Mississippi [Member]
Preferred Equity [Line Items]
Preferred stock/preferred membership interests rate				4.36%
Preferred Stock, Cumulative $100 Par Value, 4.36% Series [Member] | Entergy New Orleans [Member]
Preferred Equity [Line Items]
Payments for Repurchase of Preferred Stock and Preference Stock	$ 6,000,000
Preferred stock/preferred membership interests rate	4.36%			4.36%
Preferred Stock, Cumulative $100 Par Value, 4.75% Series [Member] | Entergy New Orleans [Member]
Preferred Equity [Line Items]
Payments for Repurchase of Preferred Stock and Preference Stock	$ 7,800,000
Preferred stock/preferred membership interests rate	4.75%			4.75%
Preferred Stock, Cumulative One Thousand Dollar Par Value, Seven Point Five Percent Series [Member] | Entergy Utility Holding Company LLC [Member]
Preferred Equity [Line Items]
Preferred stock/preferred membership interests rate		7.50%		7.50%
Temporary Equity, Shares Issued		110,000
Temporary Equity, Par Value		$ 1,000
Temporary Equity, Redemption Price Per Share				$ 1,000
Adjustments to Additional Paid in Capital, Stock Issued, Issuance Costs				$ 2,575,000
Preferred Stock, Cumulative $1,000 Par Value 6.25% Series [Domain] | Entergy Utility Holding Company LLC [Member]
Preferred Equity [Line Items]
Preferred stock/preferred membership interests rate	6.25%			6.25%
Temporary Equity, Shares Issued	15,000
Temporary Equity, Par Value	$ 1,000
Temporary Equity, Redemption Price Per Share				$ 1,000
Adjustments to Additional Paid in Capital, Stock Issued, Issuance Costs				$ 602,000
Preferred Stock, Cumulative $100 Par Value, 5.56% Series [Member] | Entergy New Orleans [Member]
Preferred Equity [Line Items]
Payments for Repurchase of Preferred Stock and Preference Stock	$ 6,000,000
Preferred stock/preferred membership interests rate	5.56%			5.56%