Risk Management and Fair Values (Narrative) (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Risk Management and Fair Values [Abstract]
Cash flow hedges relating to power sales as part of net unrealized gains		$ 151
Reclassified from accumulated other comprehensive income (OCI) to operating revenues		123
Maturity of cash flow hedges, before taxes		268	168	220
Maturity of cash flow hedges, Tax		94	59	77
Planned generation sold forward from non utility nuclear power plants in the next three quarters	85.00%
Planned Generation Sold Forward under financial derivatives	51.00%
Change in cash flow hedges due to ineffectiveness		(14)	(6)	1
Dollar amount of hedge contract in a liability position		2.0
Total volume of natural gas swaps outstanding (MMBtu)		39,380,000
Cash flow hedges in-the-money contracts		180
Cash flow hedges out-of-money contracts		$ 2
Entergy Gulf States Louisiana [Member]
Risk Management and Fair Values [Abstract]
Total volume of natural gas swaps outstanding (MMBtu)		12,670,000
Entergy Louisiana [Member]
Risk Management and Fair Values [Abstract]
Total volume of natural gas swaps outstanding (MMBtu)		16,300,000
Entergy Mississippi [Member]
Risk Management and Fair Values [Abstract]
Total volume of natural gas swaps outstanding (MMBtu)		10,410,000