Risk Management and Fair Values (Narrative) (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended
	Mar. 31, 2014 MWh MMBTU	Mar. 31, 2013	Mar. 31, 2014 Entergy Arkansas [Member] MWh	Mar. 31, 2014 Entergy Gulf States Louisiana [Member] MWh MMBTU	Mar. 31, 2014 Entergy Louisiana [Member] MWh MMBTU	Mar. 31, 2014 Entergy Mississippi [Member] MWh MMBTU	Mar. 31, 2014 Entergy New Orleans [Member] MWh	Mar. 31, 2014 Entergy Texas [Member] MWh	Mar. 31, 2014 Fixed Transmission Rights (FTRs) [Member] Entergy Arkansas [Member]	Mar. 31, 2014 Utility and Entergy Wholesale Commodities [Member] Electricity Swaps And Options And Fixed Transmission Rights [Member]	Dec. 31, 2013 Utility and Entergy Wholesale Commodities [Member] Electricity Swaps And Options And Fixed Transmission Rights [Member]	Mar. 31, 2014 Utility and Entergy Wholesale Commodities [Member] Fixed Transmission Rights (FTRs) [Member]	Mar. 31, 2014 Entergy Wholesale Commodities [Member] Electricity Swaps And Options [Member]
Risk Management and Fair Values [Abstract]
Cash Collateral for Borrowed Securities											$ 4
Cash collateral posted									1	65	47	1	64
Cash flow hedges relating to power sales as part of net unrealized gains	98
Reclassified from accumulated other comprehensive income (OCI) to operating revenues	74
Maturity of cash flow hedges, before taxes	(195)	(2)
Maturity of cash flow hedges, Tax	(68)	(1)
Maximum length of time over which Company is currently hedging the variability in future cash flows for forecasted power transactions, years	2 years 9 months
Planned generation sold forward from non utility nuclear power plants for the remainder of the period	75.00%
Planned Generation Sold Forward under financial derivatives	45.00%
Total planned generation for remainder of the period (MMBtu)	30,000,000
Total volume of natural gas swaps outstanding (MMBtu)	42,490,000			16,070,000	19,180,000	7,240,000
Total volume of fixed transmission rights outstanding (MMBtu)	15,554,000		3,540,000	2,613,000	3,998,000	2,319,000	523,000	2,423,000
Change in cash flow hedges due to ineffectiveness	1.0	(1.3)
Dollar amount of hedge contract in a liability position	$ 98	$ 25