Leases Leases (Present Value Of future Minimum Lease Payments Sale Leaseback Transactions) (Details) - USD ($) $ in Thousands	3 Months Ended	12 Months Ended
Mar. 31, 2019	Mar. 31, 2018	Dec. 31, 2018
Long-term Debt, Fair Value	$ 17,613,263		$ 15,880,239
Interest Expense, Debt	200,993	$ 182,923
Entergy Arkansas [Member]
Long-term Debt, Fair Value	3,471,105		3,002,627
Interest Expense, Debt	33,383	29,766
Entergy Louisiana [Member]
Long-term Debt, Fair Value	7,665,243		6,834,134
Interest Expense, Debt	74,703	70,096
Entergy Mississippi [Member]
Long-term Debt, Fair Value	1,332,283		1,276,452
Interest Expense, Debt	14,540	13,905
Entergy New Orleans [Member]
Long-term Debt, Fair Value	510,959		491,569
Interest Expense, Debt	5,936	5,279
Entergy Texas [Member]
Long-term Debt, Fair Value	1,755,754		1,528,828
Interest Expense, Debt	22,460	22,051
System Energy [Member]
Long-term Debt, Fair Value	586,518		596,123
Interest Expense, Debt	$ 9,397	$ 9,325
Grand Gulf [Member] \| System Energy [Member]
Long-term Debt, Maturities, Repayments of Principal in Next Twelve Months			17,188
Long-term Debt, Maturities, Repayments of Principal in Year Two			17,188
Long-term Debt, Maturities, Repayments of Principal in Year Three			17,188
Long-term Debt, Maturities, Repayments of Principal in Year Four			17,188
Long-term Debt, Maturities, Repayments of Principal in Year Five			17,188
Long-term Debt, Maturities, Repayments of Principal after Year Five			223,437
Long-term Debt, Fair Value			309,377
Interest Expense, Debt			275,025
Long-term Debt			$ 34,352

Amount of the cost of borrowed funds accounted for as interest expense for debt.

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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