Risk Management and Fair Values (Derivative Instruments Not Designated As Hedging Instruments On The Consolidated Statements Of Income) (Details) (Not Designated As Hedging Instrument [Member], USD $) In Millions, unless otherwise specified	3 Months Ended		6 Months Ended				12 Months Ended	3 Months Ended				6 Months Ended	3 Months Ended		6 Months Ended		3 Months Ended	6 Months Ended	3 Months Ended		6 Months Ended		3 Months Ended	6 Months Ended	3 Months Ended		6 Months Ended		3 Months Ended	6 Months Ended	3 Months Ended	6 Months Ended		3 Months Ended	6 Months Ended	3 Months Ended	6 Months Ended
	Jun. 30, 2014 Competitive Businesses Operating Revenues [Member] Electricity Swaps And Options [Member]	Jun. 30, 2013 Competitive Businesses Operating Revenues [Member] Electricity Swaps And Options [Member]	Jun. 30, 2014 Competitive Businesses Operating Revenues [Member] Electricity Swaps And Options [Member]	Jun. 30, 2013 Competitive Businesses Operating Revenues [Member] Electricity Swaps And Options [Member]	Jun. 30, 2014 Fuel, Fuel Related Expenses And Gas Purchased For Resale [Member] Swap [Member]	Jun. 30, 2013 Fuel, Fuel Related Expenses And Gas Purchased For Resale [Member] Swap [Member]	Dec. 31, 2013 Fuel, Fuel Related Expenses And Gas Purchased For Resale [Member] Swap [Member]	Jun. 30, 2014 Fuel, Fuel Related Expenses And Gas Purchased For Resale [Member] Natural Gas Swaps [Member]	Jun. 30, 2013 Fuel, Fuel Related Expenses And Gas Purchased For Resale [Member] Natural Gas Swaps [Member]	Jun. 30, 2014 Purchased Power Expense [Member] Fixed Transmission Rights (FTRs) [Member]	Jun. 30, 2014 Entergy Arkansas [Member] Purchased Power Expense [Member] Fixed Transmission Rights (FTRs) [Member]	Jun. 30, 2014 Entergy Arkansas [Member] Purchased Power Expense [Member] Fixed Transmission Rights (FTRs) [Member]	Jun. 30, 2014 Entergy Gulf States Louisiana [Member] Fuel, Fuel Related Expenses And Gas Purchased For Resale [Member] Natural Gas Swaps [Member]	Jun. 30, 2013 Entergy Gulf States Louisiana [Member] Fuel, Fuel Related Expenses And Gas Purchased For Resale [Member] Natural Gas Swaps [Member]	Jun. 30, 2014 Entergy Gulf States Louisiana [Member] Fuel, Fuel Related Expenses And Gas Purchased For Resale [Member] Natural Gas Swaps [Member]	Jun. 30, 2013 Entergy Gulf States Louisiana [Member] Fuel, Fuel Related Expenses And Gas Purchased For Resale [Member] Natural Gas Swaps [Member]	Jun. 30, 2014 Entergy Gulf States Louisiana [Member] Purchased Power Expense [Member] Fixed Transmission Rights (FTRs) [Member]	Jun. 30, 2014 Entergy Gulf States Louisiana [Member] Purchased Power Expense [Member] Fixed Transmission Rights (FTRs) [Member]	Jun. 30, 2014 Entergy Louisiana [Member] Fuel, Fuel Related Expenses And Gas Purchased For Resale [Member] Natural Gas Swaps [Member]	Jun. 30, 2013 Entergy Louisiana [Member] Fuel, Fuel Related Expenses And Gas Purchased For Resale [Member] Natural Gas Swaps [Member]	Jun. 30, 2014 Entergy Louisiana [Member] Fuel, Fuel Related Expenses And Gas Purchased For Resale [Member] Natural Gas Swaps [Member]	Jun. 30, 2013 Entergy Louisiana [Member] Fuel, Fuel Related Expenses And Gas Purchased For Resale [Member] Natural Gas Swaps [Member]	Jun. 30, 2014 Entergy Louisiana [Member] Purchased Power Expense [Member] Fixed Transmission Rights (FTRs) [Member]	Jun. 30, 2014 Entergy Louisiana [Member] Purchased Power Expense [Member] Fixed Transmission Rights (FTRs) [Member]	Jun. 30, 2014 Entergy Mississippi [Member] Fuel, Fuel Related Expenses And Gas Purchased For Resale [Member] Natural Gas Swaps [Member]	Jun. 30, 2013 Entergy Mississippi [Member] Fuel, Fuel Related Expenses And Gas Purchased For Resale [Member] Natural Gas Swaps [Member]	Jun. 30, 2014 Entergy Mississippi [Member] Fuel, Fuel Related Expenses And Gas Purchased For Resale [Member] Natural Gas Swaps [Member]	Jun. 30, 2013 Entergy Mississippi [Member] Fuel, Fuel Related Expenses And Gas Purchased For Resale [Member] Natural Gas Swaps [Member]	Jun. 30, 2014 Entergy Mississippi [Member] Purchased Power Expense [Member] Fixed Transmission Rights (FTRs) [Member]	Jun. 30, 2014 Entergy Mississippi [Member] Purchased Power Expense [Member] Fixed Transmission Rights (FTRs) [Member]	Jun. 30, 2013 Entergy New Orleans [Member] Fuel, Fuel Related Expenses And Gas Purchased For Resale [Member] Natural Gas Swaps [Member]	Jun. 30, 2014 Entergy New Orleans [Member] Fuel, Fuel Related Expenses And Gas Purchased For Resale [Member] Natural Gas Swaps [Member]	Jun. 30, 2013 Entergy New Orleans [Member] Fuel, Fuel Related Expenses And Gas Purchased For Resale [Member] Natural Gas Swaps [Member]	Jun. 30, 2014 Entergy New Orleans [Member] Purchased Power Expense [Member] Fixed Transmission Rights (FTRs) [Member]	Jun. 30, 2014 Entergy New Orleans [Member] Purchased Power Expense [Member] Fixed Transmission Rights (FTRs) [Member]	Jun. 30, 2014 Entergy Texas [Member] Purchased Power Expense [Member] Fixed Transmission Rights (FTRs) [Member]	Jun. 30, 2014 Entergy Texas [Member] Purchased Power Expense [Member] Fixed Transmission Rights (FTRs) [Member]
Effect of Derivative instruments not designated as hedging instruments on the consolidated statements of income
Amount of gain (loss) recognized in AOCI	$ (14)	$ (1)	$ 7	$ 0	$ 0		$ 0
Amount of gain (loss) recorded in income	$ 4.0	$ (9.0)	$ 25.0	$ (10.0)	$ 21.0	$ 9.0		$ 4.0	$ 29.0	$ 89.0	$ 6.7	$ 11.8	$ 1.4	$ 9.0	$ 8.2	$ 2.8	$ 26.1	$ 35.1	$ 2.2	$ 12.2	$ 10.2	$ 3.9	$ 12.4	$ 20.4	$ 0.6	$ 7.9	$ 2.2	$ 2.5	$ 4.5	$ 12.3	$ (0.1)	$ 0.7	$ (0.1)	$ 3.3	$ 6.3	$ 33.4	$ 46.2