Preferred Equity (Narratives) (Details) - USD ($)	1 Months Ended				12 Months Ended
	Nov. 30, 2018	Nov. 30, 2017	Oct. 31, 2015	Dec. 31, 2013	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Preferred Equity [Line Items]
Payments for Repurchase of Preferred Stock and Preference Stock					$ 53,868,000	$ 20,599,000	$ 115,283,000
Preferred Stock, Shares Authorized					450,000	892,307
Adjustments to Additional Paid in Capital, Stock Issued, Issuance Costs					$ 728,000
Entergy Arkansas [Member]
Preferred Equity [Line Items]
Payments for Repurchase of Preferred Stock and Preference Stock					$ 32,660,000	$ 0	85,283,000
Preferred Units, Authorized					0	313,500
Entergy Mississippi [Member]
Preferred Equity [Line Items]
Payments for Repurchase of Preferred Stock and Preference Stock					$ 21,208,000	$ 0	30,000,000
Preferred Units, Authorized					0	203,807
Entergy New Orleans [Member]
Preferred Equity [Line Items]
Payments for Repurchase of Preferred Stock and Preference Stock					$ 0	$ 20,599,000	$ 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%
Preferred Stock, Shares Authorized				250,000	250,000	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 $1,000 Par Value 6.75% Series [Domain] | Entergy Utility Holding Company LLC [Member]
Preferred Equity [Line Items]
Preferred stock/preferred membership interests rate	6.75%				6.75%
Temporary Equity, Par Value	$ 1,000
Temporary Equity, Redemption Price Per Share					$ 1,000
Adjustments to Additional Paid in Capital, Stock Issued, Issuance Costs					$ 1,638,000
Preferred Units, Authorized	75,000				75,000	0
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 Units, Authorized					0	59,920
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, 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 Units, Authorized			110,000		110,000	110,000
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, Par Value		$ 1,000
Temporary Equity, Redemption Price Per Share					$ 1,000
Adjustments to Additional Paid in Capital, Stock Issued, Issuance Costs					$ 634,000
Preferred Units, Authorized		15,000			15,000	15,000