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Decommissioning Trust Funds (Fair Value Of Debt Securities By Contractual Maturities) (Details) - USD ($) $ in Thousands | Jun. 30, 2023 | Dec. 31, 2022
--- | --- | ---
Fair value of debt securities by contractual maturities |  |
1 year - 5 years | $ 490,000 | $ 520,000
5 years - 10 years | 481,000 | 461,000
10 years - 15 years | 116,000 | 117,000
15 years - 20 years | 156,000 | 161,000
20 years+ | 358,000 | 334,000
Total | 1,707,000 | 1,655,000
Debt Securities, Available-for-sale, Maturity, Allocated and Single Maturity Date, within One Year, Fair Value | 106,000 | 62,000
Decommissioning Fund Investments | 4,560,006 | 4,121,864
Entergy Arkansas [Member] |  |
Fair value of debt securities by contractual maturities |  |
1 year - 5 years | 146,700 | 159,700
5 years - 10 years | 194,700 | 191,700
10 years - 15 years | 42,100 | 38,000
15 years - 20 years | 42,100 | 42,600
20 years+ | 20,300 | 17,500
Total | 484,800 | 470,700
Debt Securities, Available-for-sale, Maturity, Allocated and Single Maturity Date, within One Year, Fair Value | 38,900 | 21,200
Decommissioning Fund Investments | 1,326,627 | 1,199,860
Entergy Louisiana [Member] |  |
Fair value of debt securities by contractual maturities |  |
1 year - 5 years | 153,300 | 159,100
5 years - 10 years | 170,000 | 161,700
10 years - 15 years | 68,900 | 67,100
15 years - 20 years | 77,200 | 83,300
20 years+ | 238,400 | 220,300
Total | 753,400 | 725,100
Debt Securities, Available-for-sale, Maturity, Allocated and Single Maturity Date, within One Year, Fair Value | 45,600 | 33,600
Decommissioning Fund Investments | 1,973,128 | 1,779,090
System Energy [Member] |  |
Fair value of debt securities by contractual maturities |  |
1 year - 5 years | 190,100 | 201,700
5 years - 10 years | 115,800 | 107,100
10 years - 15 years | 4,800 | 11,700
15 years - 20 years | 36,300 | 35,000
20 years+ | 101,100 | 97,400
Total | 469,100 | 459,700
Debt Securities, Available-for-sale, Maturity, Allocated and Single Maturity Date, within One Year, Fair Value | 21,000 | 6,800
Decommissioning Fund Investments | $ 1,260,251 | $ 1,142,914

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- Definition Fair value of investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale), with single maturity date and allocated without single maturity date, maturing in sixth through tenth fiscal year following current fiscal year. Excludes interim and annual periods when interim periods are reported from current statement of financial position date (rolling approach). + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 320 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 3 -Subparagraph (c) -Publisher FASB -URI https://asc.fasb.org//1943274/2147481800/320-10-50-3 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Topic 942 -SubTopic 320 -Name Accounting Standards Codification -Section 50 -Paragraph 3A -Subparagraph (c) -Publisher FASB -URI https://asc.fasb.org//1943274/2147480832/942-320-50-3A + Details
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- Definition Decommission fund to pay for the costs of decontaminating and decommissioning of facilities through collection of revenues derived from utility assessments and government appropriations. Decommission fund investment for the process whereby a power station, at the end of its economic life, is taken permanently out of service and its site made available for other purposes. In the case of a nuclear station this comprises three different states of clearance. Immediately after the final closure, radioactive material such as nuclear fuel and operational waste is removed and the buildings surrounding the reactor shield are dismantled and finally the reactor itself is dismantled. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 210 -SubTopic 10 -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(12)) -Publisher FASB -URI https://asc.fasb.org//1943274/2147480566/210-10-S99-1 + Details
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