Risk Management and Fair Values (Narrative) (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2013 MWh counterparty MMBTU	Dec. 31, 2012 counterparty	Dec. 31, 2011
Risk Management and Fair Values [Abstract]
Cash flow hedges relating to power sales as part of net unrealized gains	$ 118
Reclassified from accumulated other comprehensive income (OCI) to operating revenues	80
Maturity of cash flow hedges, before taxes	47	268	168
Maturity of cash flow hedges, Tax	18	94	59
Planned generation sold forward from non utility nuclear power plants in the next three quarters	74.00%
Planned Generation Sold Forward under financial derivatives	62.00%
Planned Generation Under Normal Purchase Sold Under Financial Derivatives	39,000,000
Change in cash flow hedges due to ineffectiveness	(6)	(14)	(6)
Dollar amount of hedge contract in a liability position	187	2
Total volume of natural gas swaps outstanding (MMBtu)	27,480,000
Total volume of FTRs outstanding (MWh)	37,647,000
Cash Collateral Requirement	$ 47
Number of Hedge Contracts Counterparties	9	2
Entergy Arkansas [Member]
Risk Management and Fair Values [Abstract]
Total volume of FTRs outstanding (MWh)	8,769,000
Entergy Gulf States Louisiana [Member]
Risk Management and Fair Values [Abstract]
Total volume of natural gas swaps outstanding (MMBtu)	10,340,000
Total volume of FTRs outstanding (MWh)	6,125,000
Entergy Louisiana [Member]
Risk Management and Fair Values [Abstract]
Total volume of natural gas swaps outstanding (MMBtu)	13,050,000
Total volume of FTRs outstanding (MWh)	9,202,000
Entergy Mississippi [Member]
Risk Management and Fair Values [Abstract]
Total volume of natural gas swaps outstanding (MMBtu)	3,590,000
Total volume of FTRs outstanding (MWh)	6,112,000
Entergy New Orleans [Member]
Risk Management and Fair Values [Abstract]
Total volume of natural gas swaps outstanding (MMBtu)	500,000
Total volume of FTRs outstanding (MWh)	1,402,000
Entergy Texas [Member]
Risk Management and Fair Values [Abstract]
Total volume of FTRs outstanding (MWh)	6,038,000
Maximum [Member]
Risk Management and Fair Values [Abstract]
Hedging the Variability in Future Cash Flow, Period	3 years