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Rate And Regulatory Matters (Narrative) (Details) (USD $) | 20 Months Ended |  |  | 1 Months Ended | 6 Months Ended |  | 1 Months Ended |  |  | 1 Months Ended | 6 Months Ended |  | 1 Months Ended | 3 Months Ended | 1 Months Ended |  |  | 1 Months Ended | 12 Months Ended
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May 02, 2003 | Jun. 30, 2014 | Dec. 31, 2013 | Jun. 30, 2014 Entergy Louisiana [Member] | May 31, 2014 Entergy Louisiana [Member] | Jan. 31, 2014 Entergy Louisiana [Member] | Mar. 31, 2013 Entergy Louisiana [Member] | Jan. 31, 2013 Entergy Louisiana [Member] | Jun. 30, 2014 Entergy Louisiana [Member] | Dec. 31, 2013 Entergy Louisiana [Member] | Aug. 31, 2014 Entergy Louisiana [Member] Subsequent Event [Member] | Jul. 31, 2014 Entergy Louisiana [Member] Subsequent Event [Member] | Jun. 30, 2014 Entergy Mississippi [Member] | May 31, 2014 Entergy Mississippi [Member] | Mar. 31, 2014 Entergy Mississippi [Member] | Dec. 31, 2013 Entergy Mississippi [Member] | Jun. 30, 2014 Entergy Gulf States Louisiana [Member] | May 31, 2014 Entergy Gulf States Louisiana [Member] | Apr. 30, 2014 Entergy Gulf States Louisiana [Member] | Jan. 31, 2013 Entergy Gulf States Louisiana [Member] | Jun. 30, 2014 Entergy Gulf States Louisiana [Member] | Dec. 31, 2013 Entergy Gulf States Louisiana [Member] | Aug. 31, 2014 Entergy Gulf States Louisiana [Member] Subsequent Event [Member] | Aug. 31, 2012 Entergy New Orleans [Member] | Apr. 30, 2014 Entergy Texas [Member] | Jan. 31, 2014 Entergy Texas [Member] | Sep. 30, 2013 Entergy Texas [Member] | Mar. 31, 2014 Entergy Texas [Member] | May 31, 2014 Entergy Arkansas [Member] | Jun. 30, 2014 Entergy Arkansas [Member] | Dec. 31, 2013 Entergy Arkansas [Member] | Aug. 31, 2014 Entergy Holdings Company LLC [Member] Subsequent Event [Member] | Sep. 30, 2013 Natural Gas Processing Plant [Member] Entergy Gulf States Louisiana [Member]
Commitments and Contingencies [Abstract] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Public Utilities Earned Return On Common Equity |  |  |  | 9.95% |  | 8.13% | 10.40% |  |  |  |  |  | 10.59% |  |  |  |  |  |  |  |  |  |  |  | 9.80% | 9.20% | 10.40% |  |  |  |  |  | 5.47%
Rate Increase |  |  |  | $ 9,300,000 | $ 10,000,000 | $ 5,560,000 | $ 13,000,000 |  |  |  |  |  |  |  |  |  |  |  | $ 1,500,000 |  |  |  |  |  | $ 18,500,000 |  | $ 38,600,000 | $ 18,500,000 |  |  |  |  | $ 1,500,000
Rate Increase Through MISO Recovery Rider |  |  |  | 853,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Public Utilities, Requested Rate Increase (Decrease), Amount |  |  |  |  |  |  |  |  |  |  |  |  | 49,000,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Requested Rate Increase Including New Depreciation Rates |  |  |  |  |  |  |  |  |  |  |  |  | 30,000,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Rate Increase Period |  |  |  |  |  | 3 years | 3 years |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Rate Case Filing Request To Reconcile Fuel and Purchased Power Costs and Fuel Revenues |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 900,000,000 |  |  |  |  |  |
Rate Case Filing Request Special Circumstances Fuel Cost Recovery Of Purchased Power Costs |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 22,000,000 |  |  |  |  |  |
Storm restoration costs incurred - Hurricane Isaac |  |  |  |  |  |  |  |  | 247,700,000 |  |  |  |  |  |  |  |  |  |  |  | 73,800,000 |  |  | 47,300,000 |  |  |  |  |  |  |  |  |
Rate reduction |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 300,000 |  |  |  |  |  |  |
Period of prohibited refunds | 20 months |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Storm reserve withdrawal |  |  |  |  |  |  |  | 187,000,000 |  |  |  |  |  |  |  |  |  |  |  | 65,000,000 |  |  |  | 17,400,000 |  |  |  |  |  |  |  |  |
Storm restoration costs deemed prudently incurred - Hurricane Isaac |  |  |  |  |  |  |  |  | 224,300,000 |  |  |  |  |  |  |  |  |  |  |  | 66,500,000 |  |  |  |  |  |  |  |  |  |  |  |
Requested Replenishment of Storm Escrow Accounts Hurricane Issac |  |  |  | 200,000,000 |  |  |  |  |  |  |  |  |  |  |  |  | 90,000,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
LCDA issuance of bonds under Louisiana Act 55 financing |  |  |  |  |  |  |  |  |  |  | 243.85 |  |  |  |  |  |  |  |  |  |  |  | 71,000,000 |  |  |  |  |  |  |  |  |  |
Bond proceeds loaned by LCDA to LURC under Louisiana Act 55 financing |  |  |  |  |  |  |  |  |  |  | 240,000,000 |  |  |  |  |  |  |  |  |  |  |  | 69,000,000 |  |  |  |  |  |  |  |  |  |
Amount transfered to restricted escrow account as storm damage reserve |  |  |  |  |  |  |  |  |  |  | 13,000,000 |  |  |  |  |  |  |  |  |  |  |  | 3,000,000 |  |  |  |  |  |  |  |  |  |
Bond proceeds transfered to company under Louisiana Act 55 financing |  |  |  |  |  |  |  |  |  |  | 227,000,000 |  |  |  |  |  |  |  |  |  |  |  | 66,000,000 |  |  |  |  |  |  |  |  |  |
Bond proceeds used to acquire preferred units |  |  |  |  |  |  |  |  |  |  | 227,000,000 |  |  |  |  |  |  |  |  |  |  |  | 66,000,000 |  |  |  |  |  |  |  |  |  |
Class preferred non voting membership interest units acquired in wholly owned Subsidiary |  |  |  |  |  |  |  |  |  |  | 2,272,725.89 |  |  |  |  |  |  |  |  |  |  |  | 662,426.80 |  |  |  |  |  |  |  |  |  |
Annual distribution rate |  |  |  |  |  |  |  |  |  |  | 7.50% |  |  |  |  |  |  |  |  |  |  |  | 7.50% |  |  |  |  |  |  |  |  |  |
Liquidation price per unit |  |  |  |  |  |  |  |  |  |  | 100 |  |  |  |  |  |  |  |  |  |  |  | 100 |  |  |  |  |  |  |  |  |  |
Net worth required under terms of membership interest |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 1,750,000,000 |
Redetermination Of Production Cost Allocation Rider Unrecovered Retail Balance |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 3,000,000 |  |  |  |
System Agreement Bandwidth Remedy Payments |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 68,000,000 |  |  |  |
Deferred Fuel Cost |  | 311,018,000 | 116,379,000 | 44,889,000 |  |  |  |  | 44,889,000 | 0 |  |  | 54,594,000 |  | 60,400,000 | 38,057,000 | 25,957,000 |  |  |  | 25,957,000 | 9,625,000 |  |  |  |  |  |  |  | 185,579,000 | 68,696,000 |  |
Natural Gas Cost |  |  |  |  |  |  |  |  |  |  |  |  |  | 4.50 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Rate increase value to reflect special formula rate plan rate implementation adjustment |  |  |  |  | 39,000,000 |  |  |  |  |  |  |  |  |  |  |  |  | 3,800,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Recommended potential project and replacement power cost disallowances |  |  |  |  |  |  |  |  |  |  |  | 71,000,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Intervenor recommended disallowance of incremental project costs |  |  |  |  |  |  |  |  |  |  |  | $ 141,000,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |

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