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Retirement And Other Postretirement Benefits (Components Of Qualified Net Pension Cost) (Details) (USD $) In Thousands, unless otherwise specified | 3 Months Ended
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Mar. 31, 2014 | Mar. 31, 2013
Pension Plans Defined Benefit [Member] |  |
Defined Benefit Plan Disclosure [Line Items] |  |
Service cost - benefits earned during the period | $ 35,109 | $ 44,051
Interest cost on projected benefit obligation | 72,519 | 65,266
Expected return on assets | (90,366) | (81,748)
Amortization of prior service cost (credit) | 400 | 567
Amortization of loss | 36,274 | 54,951
Net other postretirement benefit cost | 53,936 | 83,087
Pension Plans Defined Benefit [Member] | Entergy Arkansas [Member] |  |
Defined Benefit Plan Disclosure [Line Items] |  |
Service cost - benefits earned during the period | 5,023 | 6,371
Interest cost on projected benefit obligation | 14,884 | 13,550
Expected return on assets | (18,305) | (16,717)
Amortization of prior service cost (credit) |  | 6
Amortization of loss | 8,989 | 12,544
Net other postretirement benefit cost | 10,591 | 15,754
Pension Plans Defined Benefit [Member] | Entergy Gulf States Louisiana [Member] |  |
Defined Benefit Plan Disclosure [Line Items] |  |
Service cost - benefits earned during the period | 2,881 | 3,599
Interest cost on projected benefit obligation | 7,278 | 6,657
Expected return on assets | (9,488) | (8,734)
Amortization of prior service cost (credit) |  | 2
Amortization of loss | 3,981 | 5,933
Net other postretirement benefit cost | 4,652 | 7,457
Pension Plans Defined Benefit [Member] | Entergy Louisiana [Member] |  |
Defined Benefit Plan Disclosure [Line Items] |  |
Service cost - benefits earned during the period | 3,546 | 4,334
Interest cost on projected benefit obligation | 9,467 | 8,644
Expected return on assets | (11,449) | (10,454)
Amortization of prior service cost (credit) |  | 21
Amortization of loss | 6,131 | 8,727
Net other postretirement benefit cost | 7,695 | 11,272
Pension Plans Defined Benefit [Member] | Entergy Mississippi [Member] |  |
Defined Benefit Plan Disclosure [Line Items] |  |
Service cost - benefits earned during the period | 1,523 | 1,842
Interest cost on projected benefit obligation | 4,318 | 3,930
Expected return on assets | (5,698) | (5,279)
Amortization of prior service cost (credit) |  | 2
Amortization of loss | 2,354 | 3,344
Net other postretirement benefit cost | 2,497 | 3,839
Pension Plans Defined Benefit [Member] | Entergy New Orleans [Member] |  |
Defined Benefit Plan Disclosure [Line Items] |  |
Service cost - benefits earned during the period | 666 | 832
Interest cost on projected benefit obligation | 2,041 | 1,849
Expected return on assets | (2,505) | (2,270)
Amortization of prior service cost (credit) |  | 0
Amortization of loss | 1,449 | 2,011
Net other postretirement benefit cost | 1,651 | 2,422
Pension Plans Defined Benefit [Member] | Entergy Texas [Member] |  |
Defined Benefit Plan Disclosure [Line Items] |  |
Service cost - benefits earned during the period | 1,285 | 1,637
Interest cost on projected benefit obligation | 4,437 | 4,055
Expected return on assets | (5,931) | (5,566)
Amortization of prior service cost (credit) |  | 2
Amortization of loss | 2,339 | 3,373
Net other postretirement benefit cost | 2,130 | 3,501
Pension Plans Defined Benefit [Member] | System Energy [Member] |  |
Defined Benefit Plan Disclosure [Line Items] |  |
Service cost - benefits earned during the period | 1,446 | 1,836
Interest cost on projected benefit obligation | 3,390 | 3,016
Expected return on assets | (4,155) | (4,299)
Amortization of prior service cost (credit) |  | 3
Amortization of loss | 2,375 | 2,429
Net other postretirement benefit cost | 3,056 | 2,985
Other Postretirement [Member] |  |
Defined Benefit Plan Disclosure [Line Items] |  |
Service cost - benefits earned during the period | 10,873 | 18,917
Interest cost on projected benefit obligation | 17,960 | 19,766
Expected return on assets | (11,197) | (9,950)
Amortization of prior service cost (credit) | (7,898) | (3,334)
Amortization of loss | 2,786 | 11,304
Net other postretirement benefit cost | 12,524 | 36,703
Other Postretirement [Member] | Entergy Arkansas [Member] |  |
Defined Benefit Plan Disclosure [Line Items] |  |
Service cost - benefits earned during the period | 1,489 | 2,414
Interest cost on projected benefit obligation | 3,065 | 3,360
Expected return on assets | (4,784) | (4,149)
Amortization of prior service cost (credit) | (610) | (133)
Amortization of loss | 317 | 2,041
Net other postretirement benefit cost | (523) | 3,533
Other Postretirement [Member] | Entergy Gulf States Louisiana [Member] |  |
Defined Benefit Plan Disclosure [Line Items] |  |
Service cost - benefits earned during the period | 1,224 | 2,001
Interest cost on projected benefit obligation | 2,095 | 2,226
Expected return on assets | 0 | 0
Amortization of prior service cost (credit) | (559) | (206)
Amortization of loss | 303 | 1,174
Net other postretirement benefit cost | 3,063 | 5,195
Other Postretirement [Member] | Entergy Louisiana [Member] |  |
Defined Benefit Plan Disclosure [Line Items] |  |
Service cost - benefits earned during the period | 1,130 | 2,172
Interest cost on projected benefit obligation | 2,066 | 2,349
Expected return on assets | 0 | 0
Amortization of prior service cost (credit) | (844) | (62)
Amortization of loss | 378 | 1,287
Net other postretirement benefit cost | 2,730 | 5,746
Other Postretirement [Member] | Entergy Mississippi [Member] |  |
Defined Benefit Plan Disclosure [Line Items] |  |
Service cost - benefits earned during the period | 475 | 819
Interest cost on projected benefit obligation | 914 | 1,074
Expected return on assets | (1,443) | (1,317)
Amortization of prior service cost (credit) | (229) | (35)
Amortization of loss | 37 | 662
Net other postretirement benefit cost | (246) | 1,203
Other Postretirement [Member] | Entergy New Orleans [Member] |  |
Defined Benefit Plan Disclosure [Line Items] |  |
Service cost - benefits earned during the period | 217 | 447
Interest cost on projected benefit obligation | 701 | 785
Expected return on assets | (1,119) | (1,014)
Amortization of prior service cost (credit) | (177) | 10
Amortization of loss | 14 | 396
Net other postretirement benefit cost | (364) | 624
Other Postretirement [Member] | Entergy Texas [Member] |  |
Defined Benefit Plan Disclosure [Line Items] |  |
Service cost - benefits earned during the period | 595 | 950
Interest cost on projected benefit obligation | 1,413 | 1,515
Expected return on assets | (2,590) | (2,321)
Amortization of prior service cost (credit) | (325) | (107)
Amortization of loss | 200 | 976
Net other postretirement benefit cost | (707) | 1,013
Other Postretirement [Member] | System Energy [Member] |  |
Defined Benefit Plan Disclosure [Line Items] |  |
Service cost - benefits earned during the period | 515 | 907
Interest cost on projected benefit obligation | 653 | 729
Expected return on assets | (932) | (825)
Amortization of prior service cost (credit) | (206) | (16)
Amortization of loss | 111 | 479
Net other postretirement benefit cost | 141 | 1,274
Non-Qualified Pension Plans [Member] | Parent Company [Member] |  |
Defined Benefit Plan Disclosure [Line Items] |  |
Net other postretirement benefit cost | 10,000 | 5,500
Non-Qualified Pension Plans [Member] | Entergy Arkansas [Member] |  |
Defined Benefit Plan Disclosure [Line Items] |  |
Net other postretirement benefit cost | 161 | 103
Non-Qualified Pension Plans [Member] | Entergy Gulf States Louisiana [Member] |  |
Defined Benefit Plan Disclosure [Line Items] |  |
Net other postretirement benefit cost | 33 | 38
Non-Qualified Pension Plans [Member] | Entergy Louisiana [Member] |  |
Defined Benefit Plan Disclosure [Line Items] |  |
Net other postretirement benefit cost | 1 | 3
Non-Qualified Pension Plans [Member] | Entergy Mississippi [Member] |  |
Defined Benefit Plan Disclosure [Line Items] |  |
Net other postretirement benefit cost | 48 | 47
Non-Qualified Pension Plans [Member] | Entergy New Orleans [Member] |  |
Defined Benefit Plan Disclosure [Line Items] |  |
Net other postretirement benefit cost | 23 | 23
Non-Qualified Pension Plans [Member] | Entergy Texas [Member] |  |
Defined Benefit Plan Disclosure [Line Items] |  |
Net other postretirement benefit cost | $ 125 | $ 149

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- Definition The amount of gains or losses recognized in net periodic benefit cost. + 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 (h)(4) -URI http://asc.fasb.org/extlink&oid=28361610&loc=d3e1928-114920 + Details
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- Definition The amount of the prior service cost or credit recognized in net periodic benefit cost relating to benefit changes attributable to plan participants' prior service pursuant to a plan amendment or a plan initiation. + 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 (h)(1) -URI http://asc.fasb.org/extlink&oid=28361610&loc=d3e1928-114920 + Details
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- Definition An amount calculated as a basis for determining the extent of delayed recognition of the effects of changes in the fair value of assets. The expected return on plan assets is determined based on the expected long-term rate of return on plan assets and the market-related value of plan assets. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 30 -Glossary Expected Return on Plan Assets -URI http://asc.fasb.org/extlink&oid=6512136 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 60 -Glossary Expected Return on Plan Assets -URI http://asc.fasb.org/extlink&oid=6512171 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (h)(3) -URI http://asc.fasb.org/extlink&oid=28361610&loc=d3e1928-114920 + Details
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- Definition The increase in a defined benefit pension plan's projected benefit obligation or a defined benefit postretirement plan's accumulated postretirement benefit obligation due to the passage of time. + 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 (h)(2) -URI http://asc.fasb.org/extlink&oid=28361610&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 1 -Subparagraph (a)(2) -URI http://asc.fasb.org/extlink&oid=28361610&loc=d3e1928-114920 + Details
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- Definition The total amount of net periodic benefit cost for defined benefit plans for the period. Periodic benefit costs include the following components: service cost, interest cost, expected return on plan assets, gain (loss), prior service cost or credit, transition asset or obligation, and gain (loss) due to settlements or curtailments. + 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 (h) -URI http://asc.fasb.org/extlink&oid=28361610&loc=d3e1928-114920 + Details
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- Definition The actuarial present value of benefits attributed by the pension benefit formula to services rendered by employees during the period. The portion of the expected postretirement benefit obligation attributed to employee service during the period. The service cost component is a portion of the benefit obligation and is unaffected by the funded status of the plan. + 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 (h)(1) -URI http://asc.fasb.org/extlink&oid=28361610&loc=d3e1928-114920 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Service Cost (Component of Net Periodic Pension Cost) -URI http://asc.fasb.org/extlink&oid=6525008 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (a)(1) -URI http://asc.fasb.org/extlink&oid=28361610&loc=d3e1928-114920 + Details
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