Risk Management and Fair Values (Fair Values Of Derivative Instruments) (Details) (USD $) In Millions, unless otherwise specified	Dec. 31, 2013		Dec. 31, 2012
Liabilities:
Cash collateral posted	$ 47
Cash collateral held	4		56
Prepayments And Other [Member] | Electricity Swaps And Options [Member] | Entergy Wholesale Commodities [Member] | Designated as Hedging Instrument [Member]
Assets:
Derivative asset, fair value	118.0	[1]	123.0	[1]
Derivative asset as hedging instrument offset	(99)	[2]	0	[2]
Derivative asset, net	19	[3],[4]	123	[3],[4]
Prepayments And Other [Member] | Electricity Swaps And Options [Member] | Entergy Wholesale Commodities [Member] | Not Designated As Hedging Instrument [Member]
Assets:
Derivative asset, fair value	177.0	[1]	22.0	[1]
Derivative asset as hedging instrument offset	(122)	[2]	0	[2]
Derivative asset, net	55	[3],[4]	22	[3],[4]
Prepayments And Other [Member] | Natural Gas Swaps [Member] | Utility Plants [Member] | Not Designated As Hedging Instrument [Member]
Assets:
Derivative asset, fair value	6.0	[1]
Derivative asset as hedging instrument offset		[2]
Derivative asset, net	6	[3],[4]
Prepayments And Other [Member] | Fixed Transmission Rights (FTRs) [Member] | Entergy Wholesale Commodities [Member] | Not Designated As Hedging Instrument [Member]
Assets:
Derivative asset, fair value	36.0	[1]
Derivative asset as hedging instrument offset	(2)	[2]
Derivative asset, net	34	[3],[4]
Other Deferred Debits And Other Assets [Member] | Electricity Swaps And Options [Member] | Entergy Wholesale Commodities [Member] | Designated as Hedging Instrument [Member]
Assets:
Derivative asset, fair value	17.0	[1]	46.0	[1]
Derivative asset as hedging instrument offset	(17)	[2]	(10)	[2]
Derivative asset, net	0	[3],[4]	36	[3],[4]
Other Deferred Debits And Other Assets [Member] | Electricity Swaps And Options [Member] | Entergy Wholesale Commodities [Member] | Not Designated As Hedging Instrument [Member]
Assets:
Derivative asset, fair value			24.0	[1]
Derivative asset as hedging instrument offset			(14)	[2]
Derivative asset, net			10	[3],[4]
Other Current Liabilities [Member] | Electricity Swaps And Options [Member] | Entergy Wholesale Commodities [Member] | Designated as Hedging Instrument [Member]
Liabilities:
Derivative liability, fair value	197.0	[1]
Derivative liability as hedging instrument offset	(131)	[2]
Derivative liability, net	66.0	[3],[4]
Other Current Liabilities [Member] | Electricity Swaps And Options [Member] | Entergy Wholesale Commodities [Member] | Not Designated As Hedging Instrument [Member]
Liabilities:
Derivative liability, fair value			19.0	[1]
Derivative liability as hedging instrument offset			(13)	[2]
Derivative liability, net			6.0	[3],[4]
Other Current Liabilities [Member] | Natural Gas Swaps [Member] | Utility Plants [Member] | Not Designated As Hedging Instrument [Member]
Liabilities:
Derivative liability, fair value			8.0	[1]
Derivative liability as hedging instrument offset				[2]
Derivative liability, net			8.0	[3],[4]
Other Non-Current Liabilities [Member] | Electricity Swaps And Options [Member] | Entergy Wholesale Commodities [Member] | Designated as Hedging Instrument [Member]
Liabilities:
Derivative liability, fair value	46.0	[1]	18.0	[1]
Derivative liability as hedging instrument offset	(17)	[2]	(11)	[2]
Derivative liability, net	29.0	[3],[4]	7.0	[3],[4]
Other Non-Current Liabilities [Member] | Electricity Swaps And Options [Member] | Entergy Wholesale Commodities [Member] | Not Designated As Hedging Instrument [Member]
Liabilities:
Derivative liability, fair value	201.0	[1]
Derivative liability as hedging instrument offset	(89)	[2]
Derivative liability, net	112.0	[3],[4]
Entergy Gulf States Louisiana [Member] | Gas Hedge Contracts [Member] | Natural Gas Swaps [Member] | Not Designated As Hedging Instrument [Member]
Assets:
Derivative asset, fair value	2.2
Liabilities:
Derivative liability, fair value			2.6
Entergy Gulf States Louisiana [Member] | Prepayments And Other [Member] | Fixed Transmission Rights (FTRs) [Member] | Not Designated As Hedging Instrument [Member]
Assets:
Derivative asset, fair value	6.7
Entergy Louisiana [Member] | Gas Hedge Contracts [Member] | Natural Gas Swaps [Member] | Not Designated As Hedging Instrument [Member]
Assets:
Derivative asset, fair value	2.9
Liabilities:
Derivative liability, fair value			3.4
Entergy Louisiana [Member] | Prepayments And Other [Member] | Fixed Transmission Rights (FTRs) [Member] | Not Designated As Hedging Instrument [Member]
Assets:
Derivative asset, fair value	5.7
Entergy Mississippi [Member] | Prepayments And Other [Member] | Natural Gas Swaps [Member] | Not Designated As Hedging Instrument [Member]
Assets:
Derivative asset, fair value	0.7
Entergy Mississippi [Member] | Prepayments And Other [Member] | Fixed Transmission Rights (FTRs) [Member] | Not Designated As Hedging Instrument [Member]
Assets:
Derivative asset, fair value	1.0
Entergy Mississippi [Member] | Other Current Liabilities [Member] | Natural Gas Swaps [Member] | Not Designated As Hedging Instrument [Member]
Liabilities:
Derivative liability, fair value			2.2
Entergy New Orleans [Member] | Prepayments And Other [Member] | Natural Gas Swaps [Member] | Not Designated As Hedging Instrument [Member]
Assets:
Derivative asset, fair value	0.1
Entergy New Orleans [Member] | Prepayments And Other [Member] | Fixed Transmission Rights (FTRs) [Member] | Not Designated As Hedging Instrument [Member]
Assets:
Derivative asset, fair value	2.0
Entergy Texas [Member] | Prepayments And Other [Member] | Fixed Transmission Rights (FTRs) [Member] | Not Designated As Hedging Instrument [Member]
Assets:
Derivative asset, fair value	$ 18.4

[1] Represents the gross amounts of recognized assets/liabilities

[2] Represents the netting of fair value balances with the same counterparty

[3] Represents the net amounts of assets/liabilities presented on the Entergy Consolidated Balance Sheets

[4] Excludes cash collateral in the amounts of $47 million posted and $4 million held as of December 31, 2013 and $56 million held as of December 31, 2012