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Retirement And Other Postretirement Benefits (Expected Employer Contributions) (Details) - USD ($) $ in Thousands | 3 Months Ended |
--- | --- | ---
Mar. 31, 2018 | Dec. 31, 2018
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward] |  |
Defined Benefit Plan, Plan Assets, Contributions by Employer | $ 91,800 |
Subsequent Event [Member] |  |
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward] |  |
Defined Benefit Plan, Expected Future Employer Contributions, Remainder of Fiscal Year |  | $ 352,100
Entergy Louisiana [Member] |  |
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward] |  |
Defined Benefit Plan, Plan Assets, Contributions by Employer | 19,510 |
Entergy Louisiana [Member] | Subsequent Event [Member] |  |
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward] |  |
Defined Benefit Plan, Expected Future Employer Contributions, Remainder of Fiscal Year |  | 71,917
Defined Benefit Plan Remaining Contributions To Be Made In Current Fiscal Year |  | 52,407
Entergy Mississippi [Member] |  |
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward] |  |
Defined Benefit Plan, Plan Assets, Contributions by Employer | 4,194 |
Entergy Mississippi [Member] | Subsequent Event [Member] |  |
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward] |  |
Defined Benefit Plan, Expected Future Employer Contributions, Remainder of Fiscal Year |  | 14,933
Defined Benefit Plan Remaining Contributions To Be Made In Current Fiscal Year |  | 10,739
Entergy New Orleans [Member] |  |
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward] |  |
Defined Benefit Plan, Plan Assets, Contributions by Employer | 2,061 |
Entergy New Orleans [Member] | Subsequent Event [Member] |  |
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward] |  |
Defined Benefit Plan, Expected Future Employer Contributions, Remainder of Fiscal Year |  | 7,250
Defined Benefit Plan Remaining Contributions To Be Made In Current Fiscal Year |  | 5,189
Entergy Texas [Member] |  |
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward] |  |
Defined Benefit Plan, Plan Assets, Contributions by Employer | 3,873 |
Entergy Texas [Member] | Subsequent Event [Member] |  |
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward] |  |
Defined Benefit Plan, Expected Future Employer Contributions, Remainder of Fiscal Year |  | 10,883
Defined Benefit Plan Remaining Contributions To Be Made In Current Fiscal Year |  | 7,010
System Energy [Member] |  |
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward] |  |
Defined Benefit Plan, Plan Assets, Contributions by Employer | 3,715 |
System Energy [Member] | Subsequent Event [Member] |  |
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward] |  |
Defined Benefit Plan, Expected Future Employer Contributions, Remainder of Fiscal Year |  | 13,786
Defined Benefit Plan Remaining Contributions To Be Made In Current Fiscal Year |  | 10,071
Entergy Arkansas [Member] |  |
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward] |  |
Defined Benefit Plan, Plan Assets, Contributions by Employer | $ 17,373 |
Entergy Arkansas [Member] | Subsequent Event [Member] |  |
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward] |  |
Defined Benefit Plan, Expected Future Employer Contributions, Remainder of Fiscal Year |  | 64,062
Defined Benefit Plan Remaining Contributions To Be Made In Current Fiscal Year |  | $ 46,689

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- Definition A roll forward is a reconciliation of a concept from the beginning of a period to the end of a period. + References No definition available. + Details
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- Definition Amount of contribution received by defined benefit plan from employer which increases plan assets. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (d)(5)(ii) -URI http://asc.fasb.org/extlink&oid=82843861&loc=d3e1928-114920 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 6 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=82843861&loc=d3e2709-114920 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (b)(3) -URI http://asc.fasb.org/extlink&oid=82843861&loc=d3e1928-114920 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (d)(5)(iv)(01) -URI http://asc.fasb.org/extlink&oid=82843861&loc=d3e1928-114920 + Details
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