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Property, Plant, And Equipment (Narrative) (Details) - USD ($) $ in Millions | Mar. 31, 2018 | Dec. 31, 2017
--- | --- | ---
Construction expenditures in accounts payable | $ 280.0 | $ 368.0
Entergy Arkansas [Member] |  |
Construction expenditures in accounts payable | 39.1 | 58.8
Entergy Louisiana [Member] |  |
Construction expenditures in accounts payable | 119.4 | 160.4
Entergy Mississippi [Member] |  |
Construction expenditures in accounts payable | 7.5 | 17.1
Entergy New Orleans [Member] |  |
Construction expenditures in accounts payable | 5.6 | 2.5
Entergy Texas [Member] |  |
Construction expenditures in accounts payable | 14.8 | 32.8
System Energy [Member] |  |
Construction expenditures in accounts payable | $ 41.9 | $ 33.9

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- Definition Carrying value as of the balance sheet date of obligations incurred and payable for the acquisition of merchandise, materials, supplies and services pertaining to construction projects such as a housing development or factory expansion not classified as trade payables. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-03.15(a)) -URI http://asc.fasb.org/extlink&oid=6879938&loc=d3e572229-122910 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-03.15(5)) -URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878 + Details
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