XML 195 R60.htm IDEA: XBRL DOCUMENT v2.4.0.8
Risk Management and Fair Values (Assets And Liabilities At Fair Value On A Recurring Basis) (Details) (USD $)
In Millions, unless otherwise specified
Jun. 30, 2013
Dec. 31, 2012
Liabilities at fair value on a recurring basis    
Average Coupon Rate of Debt Securities Percentage 3.62%  
Fair Value, Measurements, Recurring [Member]
   
Assets at fair value on a recurring basis    
Temporary cash investments $ 225.0 $ 420.0
Total 4,955.0 5,233.0
Liabilities at fair value on a recurring basis    
Total 18 21
Gas Hedge Contracts [Member] | Fair Value, Measurements, Recurring [Member]
   
Liabilities at fair value on a recurring basis    
Liabilities, Fair Value Disclosure on Recurring Basis 7.0 8.0
Power Contracts Liabilities [Member] | Fair Value, Measurements, Recurring [Member]
   
Liabilities at fair value on a recurring basis    
Liabilities, Fair Value Disclosure on Recurring Basis 11.0 13.0
Equity Securities [Member] | Fair Value, Measurements, Recurring [Member]
   
Assets at fair value on a recurring basis    
Assets other than temporary cash investments 2,735.0 2,459.0
Debt Securities [Member] | Fair Value, Measurements, Recurring [Member]
   
Assets at fair value on a recurring basis    
Assets other than temporary cash investments 1,732.0 1,731.0
Power Contracts Assets [Member] | Fair Value, Measurements, Recurring [Member]
   
Assets at fair value on a recurring basis    
Assets other than temporary cash investments 94.0 191.0
Securitization Recovery Trust Account [Member] | Fair Value, Measurements, Recurring [Member]
   
Assets at fair value on a recurring basis    
Assets other than temporary cash investments 37.0 46.0
Storm Reserve Escrow Account [Member] | Fair Value, Measurements, Recurring [Member]
   
Assets at fair value on a recurring basis    
Assets other than temporary cash investments 132.0 386.0
Fair Value Inputs Level 1 [Member]
   
Assets at fair value on a recurring basis    
Temporary cash investments 225.0 420.0
Total 1,530.0 1,979.0
Liabilities at fair value on a recurring basis    
Total 7 8
Fair Value Inputs Level 1 [Member] | Gas Hedge Contracts [Member]
   
Liabilities at fair value on a recurring basis    
Liabilities, Fair Value Disclosure on Recurring Basis 7.0 8.0
Fair Value Inputs Level 1 [Member] | Power Contracts Liabilities [Member]
   
Liabilities at fair value on a recurring basis    
Liabilities, Fair Value Disclosure on Recurring Basis     
Fair Value Inputs Level 1 [Member] | Equity Securities [Member]
   
Assets at fair value on a recurring basis    
Assets other than temporary cash investments 394.0 358.0
Fair Value Inputs Level 1 [Member] | Debt Securities [Member]
   
Assets at fair value on a recurring basis    
Assets other than temporary cash investments 742.0 769.0
Fair Value Inputs Level 1 [Member] | Power Contracts Assets [Member]
   
Assets at fair value on a recurring basis    
Assets other than temporary cash investments     
Fair Value Inputs Level 1 [Member] | Securitization Recovery Trust Account [Member]
   
Assets at fair value on a recurring basis    
Assets other than temporary cash investments 37.0 46.0
Fair Value Inputs Level 1 [Member] | Storm Reserve Escrow Account [Member]
   
Assets at fair value on a recurring basis    
Assets other than temporary cash investments 132.0 386.0
Fair Value Inputs Level 2 [Member]
   
Assets at fair value on a recurring basis    
Temporary cash investments     
Total 3,331.0 3,063.0
Liabilities at fair value on a recurring basis    
Total     
Fair Value Inputs Level 2 [Member] | Gas Hedge Contracts [Member]
   
Liabilities at fair value on a recurring basis    
Liabilities, Fair Value Disclosure on Recurring Basis     
Fair Value Inputs Level 2 [Member] | Power Contracts Liabilities [Member]
   
Liabilities at fair value on a recurring basis    
Liabilities, Fair Value Disclosure on Recurring Basis     
Fair Value Inputs Level 2 [Member] | Equity Securities [Member]
   
Assets at fair value on a recurring basis    
Assets other than temporary cash investments 2,341.0 2,101.0
Fair Value Inputs Level 2 [Member] | Debt Securities [Member]
   
Assets at fair value on a recurring basis    
Assets other than temporary cash investments 990.0 962.0
Fair Value Inputs Level 2 [Member] | Power Contracts Assets [Member]
   
Assets at fair value on a recurring basis    
Assets other than temporary cash investments     
Fair Value Inputs Level 2 [Member] | Securitization Recovery Trust Account [Member]
   
Assets at fair value on a recurring basis    
Assets other than temporary cash investments     
Fair Value Inputs Level 2 [Member] | Storm Reserve Escrow Account [Member]
   
Assets at fair value on a recurring basis    
Assets other than temporary cash investments     
Fair Value Inputs Level 3 [Member]
   
Assets at fair value on a recurring basis    
Temporary cash investments     
Total 94.0 191.0
Liabilities at fair value on a recurring basis    
Total 11 13
Fair Value Inputs Level 3 [Member] | Gas Hedge Contracts [Member]
   
Liabilities at fair value on a recurring basis    
Liabilities, Fair Value Disclosure on Recurring Basis     
Fair Value Inputs Level 3 [Member] | Power Contracts Liabilities [Member]
   
Liabilities at fair value on a recurring basis    
Liabilities, Fair Value Disclosure on Recurring Basis 11.0 13.0
Fair Value Inputs Level 3 [Member] | Equity Securities [Member]
   
Assets at fair value on a recurring basis    
Assets other than temporary cash investments     
Fair Value Inputs Level 3 [Member] | Debt Securities [Member]
   
Assets at fair value on a recurring basis    
Assets other than temporary cash investments     
Fair Value Inputs Level 3 [Member] | Power Contracts Assets [Member]
   
Assets at fair value on a recurring basis    
Assets other than temporary cash investments 94.0 191.0
Fair Value Inputs Level 3 [Member] | Securitization Recovery Trust Account [Member]
   
Assets at fair value on a recurring basis    
Assets other than temporary cash investments     
Fair Value Inputs Level 3 [Member] | Storm Reserve Escrow Account [Member]
   
Assets at fair value on a recurring basis    
Assets other than temporary cash investments     
Entergy Arkansas [Member]
   
Assets at fair value on a recurring basis    
Temporary cash investments 34.4 24.9
Total 722.5 667.9
Liabilities at fair value on a recurring basis    
Average Coupon Rate of Debt Securities Percentage 2.82%  
Entergy Arkansas [Member] | Equity Securities [Member]
   
Assets at fair value on a recurring basis    
Assets other than temporary cash investments 410.3 384.0
Entergy Arkansas [Member] | Debt Securities [Member]
   
Assets at fair value on a recurring basis    
Assets other than temporary cash investments 236.2 216.6
Entergy Arkansas [Member] | Securitization Recovery Trust Account [Member]
   
Assets at fair value on a recurring basis    
Assets other than temporary cash investments 3.6 4.4
Entergy Arkansas [Member] | Storm Reserve Escrow Account [Member]
   
Assets at fair value on a recurring basis    
Assets other than temporary cash investments 38.0 38.0
Entergy Arkansas [Member] | Fair Value Inputs Level 1 [Member]
   
Assets at fair value on a recurring basis    
Temporary cash investments 34.4 24.9
Total 159.8 171.1
Entergy Arkansas [Member] | Fair Value Inputs Level 1 [Member] | Equity Securities [Member]
   
Assets at fair value on a recurring basis    
Assets other than temporary cash investments 7.1 9.5
Entergy Arkansas [Member] | Fair Value Inputs Level 1 [Member] | Debt Securities [Member]
   
Assets at fair value on a recurring basis    
Assets other than temporary cash investments 76.7 94.3
Entergy Arkansas [Member] | Fair Value Inputs Level 1 [Member] | Securitization Recovery Trust Account [Member]
   
Assets at fair value on a recurring basis    
Assets other than temporary cash investments 3.6 4.4
Entergy Arkansas [Member] | Fair Value Inputs Level 1 [Member] | Storm Reserve Escrow Account [Member]
   
Assets at fair value on a recurring basis    
Assets other than temporary cash investments 38.0 38.0
Entergy Arkansas [Member] | Fair Value Inputs Level 2 [Member]
   
Assets at fair value on a recurring basis    
Total 562.7 496.8
Entergy Arkansas [Member] | Fair Value Inputs Level 2 [Member] | Equity Securities [Member]
   
Assets at fair value on a recurring basis    
Assets other than temporary cash investments 403.2 374.5
Entergy Arkansas [Member] | Fair Value Inputs Level 2 [Member] | Debt Securities [Member]
   
Assets at fair value on a recurring basis    
Assets other than temporary cash investments 159.5 122.3
Entergy Gulf States Louisiana [Member]
   
Assets at fair value on a recurring basis    
Temporary cash investments 0.6 0.6
Total 538.1 565.0
Liabilities at fair value on a recurring basis    
Average Coupon Rate of Debt Securities Percentage 4.61%  
Entergy Gulf States Louisiana [Member] | Gas Hedge Contracts [Member]
   
Liabilities at fair value on a recurring basis    
Liabilities, Fair Value Disclosure on Recurring Basis 2.1 2.6
Entergy Gulf States Louisiana [Member] | Equity Securities [Member]
   
Assets at fair value on a recurring basis    
Assets other than temporary cash investments 327.9 288.5
Entergy Gulf States Louisiana [Member] | Debt Securities [Member]
   
Assets at fair value on a recurring basis    
Assets other than temporary cash investments 188.1 188.9
Entergy Gulf States Louisiana [Member] | Storm Reserve Escrow Account [Member]
   
Assets at fair value on a recurring basis    
Assets other than temporary cash investments 21.5 87.0
Entergy Gulf States Louisiana [Member] | Fair Value Inputs Level 1 [Member]
   
Assets at fair value on a recurring basis    
Temporary cash investments 0.6 0.6
Total 80.1 142.6
Entergy Gulf States Louisiana [Member] | Fair Value Inputs Level 1 [Member] | Gas Hedge Contracts [Member]
   
Liabilities at fair value on a recurring basis    
Liabilities, Fair Value Disclosure on Recurring Basis 2.1 2.6
Entergy Gulf States Louisiana [Member] | Fair Value Inputs Level 1 [Member] | Equity Securities [Member]
   
Assets at fair value on a recurring basis    
Assets other than temporary cash investments 4.6 5.5
Entergy Gulf States Louisiana [Member] | Fair Value Inputs Level 1 [Member] | Debt Securities [Member]
   
Assets at fair value on a recurring basis    
Assets other than temporary cash investments 53.4 49.5
Entergy Gulf States Louisiana [Member] | Fair Value Inputs Level 1 [Member] | Storm Reserve Escrow Account [Member]
   
Assets at fair value on a recurring basis    
Assets other than temporary cash investments 21.5 87.0
Entergy Gulf States Louisiana [Member] | Fair Value Inputs Level 2 [Member]
   
Assets at fair value on a recurring basis    
Total 458.0 422.4
Entergy Gulf States Louisiana [Member] | Fair Value Inputs Level 2 [Member] | Equity Securities [Member]
   
Assets at fair value on a recurring basis    
Assets other than temporary cash investments 323.3 283.0
Entergy Gulf States Louisiana [Member] | Fair Value Inputs Level 2 [Member] | Debt Securities [Member]
   
Assets at fair value on a recurring basis    
Assets other than temporary cash investments 134.7 139.4
Entergy Louisiana [Member]
   
Assets at fair value on a recurring basis    
Temporary cash investments 2.6 29.3
Total 319.0 508.1
Liabilities at fair value on a recurring basis    
Average Coupon Rate of Debt Securities Percentage 3.53%  
Entergy Louisiana [Member] | Gas Hedge Contracts [Member]
   
Liabilities at fair value on a recurring basis    
Liabilities, Fair Value Disclosure on Recurring Basis 2.8 3.4
Entergy Louisiana [Member] | Equity Securities [Member]
   
Assets at fair value on a recurring basis    
Assets other than temporary cash investments 199.7 175.5
Entergy Louisiana [Member] | Debt Securities [Member]
   
Assets at fair value on a recurring basis    
Assets other than temporary cash investments 112.0 111.9
Entergy Louisiana [Member] | Securitization Recovery Trust Account [Member]
   
Assets at fair value on a recurring basis    
Assets other than temporary cash investments 4.7 4.4
Entergy Louisiana [Member] | Storm Reserve Escrow Account [Member]
   
Assets at fair value on a recurring basis    
Assets other than temporary cash investments   187.0
Entergy Louisiana [Member] | Fair Value Inputs Level 1 [Member]
   
Assets at fair value on a recurring basis    
Temporary cash investments 2.6 29.3
Total 61.0 275.3
Entergy Louisiana [Member] | Fair Value Inputs Level 1 [Member] | Gas Hedge Contracts [Member]
   
Liabilities at fair value on a recurring basis    
Liabilities, Fair Value Disclosure on Recurring Basis 2.8 3.4
Entergy Louisiana [Member] | Fair Value Inputs Level 1 [Member] | Equity Securities [Member]
   
Assets at fair value on a recurring basis    
Assets other than temporary cash investments 1.8 2.0
Entergy Louisiana [Member] | Fair Value Inputs Level 1 [Member] | Debt Securities [Member]
   
Assets at fair value on a recurring basis    
Assets other than temporary cash investments 51.9 52.6
Entergy Louisiana [Member] | Fair Value Inputs Level 1 [Member] | Securitization Recovery Trust Account [Member]
   
Assets at fair value on a recurring basis    
Assets other than temporary cash investments 4.7 4.4
Entergy Louisiana [Member] | Fair Value Inputs Level 1 [Member] | Storm Reserve Escrow Account [Member]
   
Assets at fair value on a recurring basis    
Assets other than temporary cash investments   187.0
Entergy Louisiana [Member] | Fair Value Inputs Level 2 [Member]
   
Assets at fair value on a recurring basis    
Total 258.0 232.8
Entergy Louisiana [Member] | Fair Value Inputs Level 2 [Member] | Equity Securities [Member]
   
Assets at fair value on a recurring basis    
Assets other than temporary cash investments 197.9 173.5
Entergy Louisiana [Member] | Fair Value Inputs Level 2 [Member] | Debt Securities [Member]
   
Assets at fair value on a recurring basis    
Assets other than temporary cash investments 60.1 59.3
Entergy Mississippi [Member]
   
Assets at fair value on a recurring basis    
Temporary cash investments 2.0 52.4
Total 63.8 114.2
Entergy Mississippi [Member] | Gas Hedge Contracts [Member]
   
Liabilities at fair value on a recurring basis    
Liabilities, Fair Value Disclosure on Recurring Basis 1.7 2.2
Entergy Mississippi [Member] | Storm Reserve Escrow Account [Member]
   
Assets at fair value on a recurring basis    
Assets other than temporary cash investments 61.8 61.8
Entergy Mississippi [Member] | Fair Value Inputs Level 1 [Member]
   
Assets at fair value on a recurring basis    
Temporary cash investments 2.0 52.4
Total 63.8 114.2
Entergy Mississippi [Member] | Fair Value Inputs Level 1 [Member] | Gas Hedge Contracts [Member]
   
Liabilities at fair value on a recurring basis    
Liabilities, Fair Value Disclosure on Recurring Basis 1.7 2.2
Entergy Mississippi [Member] | Fair Value Inputs Level 1 [Member] | Storm Reserve Escrow Account [Member]
   
Assets at fair value on a recurring basis    
Assets other than temporary cash investments 61.8 61.8
Entergy New Orleans
   
Assets at fair value on a recurring basis    
Temporary cash investments 27.3 9.1
Total 34.0 19.7
Entergy New Orleans | Gas Hedge Contracts [Member]
   
Liabilities at fair value on a recurring basis    
Liabilities, Fair Value Disclosure on Recurring Basis 0.1  
Entergy New Orleans | Storm Reserve Escrow Account [Member]
   
Assets at fair value on a recurring basis    
Assets other than temporary cash investments 6.7 10.6
Entergy New Orleans | Fair Value Inputs Level 1 [Member]
   
Assets at fair value on a recurring basis    
Temporary cash investments 27.3 9.1
Total 34.0 19.7
Entergy New Orleans | Fair Value Inputs Level 1 [Member] | Gas Hedge Contracts [Member]
   
Liabilities at fair value on a recurring basis    
Liabilities, Fair Value Disclosure on Recurring Basis 0.1  
Entergy New Orleans | Fair Value Inputs Level 1 [Member] | Storm Reserve Escrow Account [Member]
   
Assets at fair value on a recurring basis    
Assets other than temporary cash investments 6.7 10.6
Entergy Texas [Member]
   
Assets at fair value on a recurring basis    
Temporary cash investments 16.6 59.7
Total 45.1 97.0
Entergy Texas [Member] | Securitization Recovery Trust Account [Member]
   
Assets at fair value on a recurring basis    
Assets other than temporary cash investments 28.5 37.3
Entergy Texas [Member] | Fair Value Inputs Level 1 [Member]
   
Assets at fair value on a recurring basis    
Temporary cash investments 16.6 59.7
Total 45.1 97.0
Entergy Texas [Member] | Fair Value Inputs Level 1 [Member] | Securitization Recovery Trust Account [Member]
   
Assets at fair value on a recurring basis    
Assets other than temporary cash investments 28.5 37.3
System Energy [Member]
   
Assets at fair value on a recurring basis    
Temporary cash investments   83.5
Total 537.6 574.1
Liabilities at fair value on a recurring basis    
Average Coupon Rate of Debt Securities Percentage 2.54%  
System Energy [Member] | Equity Securities [Member]
   
Assets at fair value on a recurring basis    
Assets other than temporary cash investments 324.1 283.6
System Energy [Member] | Debt Securities [Member]
   
Assets at fair value on a recurring basis    
Assets other than temporary cash investments 213.5 207.0
System Energy [Member] | Fair Value Inputs Level 1 [Member]
   
Assets at fair value on a recurring basis    
Temporary cash investments   83.5
Total 146.1 226.2
System Energy [Member] | Fair Value Inputs Level 1 [Member] | Equity Securities [Member]
   
Assets at fair value on a recurring basis    
Assets other than temporary cash investments 0.6 1.6
System Energy [Member] | Fair Value Inputs Level 1 [Member] | Debt Securities [Member]
   
Assets at fair value on a recurring basis    
Assets other than temporary cash investments 145.5 141.1
System Energy [Member] | Fair Value Inputs Level 2 [Member]
   
Assets at fair value on a recurring basis    
Total 391.5 347.9
System Energy [Member] | Fair Value Inputs Level 2 [Member] | Equity Securities [Member]
   
Assets at fair value on a recurring basis    
Assets other than temporary cash investments 323.5 282.0
System Energy [Member] | Fair Value Inputs Level 2 [Member] | Debt Securities [Member]
   
Assets at fair value on a recurring basis    
Assets other than temporary cash investments $ 68.0 $ 65.9