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Rate And Regulatory Matters (Correction Of Regulatory Asset For Income Taxes, Income Statement And Statement Of Cash Flows) (Details) (USD $)
In Thousands, unless otherwise specified
3 Months Ended 9 Months Ended
Sep. 30, 2013
Sep. 30, 2012
Sep. 30, 2013
Sep. 30, 2012
Consolidated Statements Of Income [Abstract]        
Income taxes $ 24,553 $ 232,503 $ 214,202 $ 110,140
Net income 244,182 342,670 579,220 566,513
Earnings applicable to common equity 239,850 337,088 564,973 550,405
Consolidated Statements Of Cash Flows [Abstract]        
Deferred income taxes, investment tax credits, and non-current taxes accrued     174,052 111,228
Changes in other regulatory assets     173,164 49,250
Other operating activities     8,493 (122,263)
Entergy Arkansas [Member]
       
Consolidated Statements Of Income [Abstract]        
Income taxes 56,393 56,024 101,031 92,973
Net income 82,577 82,551 137,779 142,180
Earnings applicable to common equity 80,859 80,833 132,624 137,025
Consolidated Statements Of Cash Flows [Abstract]        
Deferred income taxes, investment tax credits, and non-current taxes accrued     99,442 97,641
Changes in other regulatory assets     2,515 51,089
Other operating activities     7,982 (51,661)
Entergy Gulf States Louisiana [Member]
       
Consolidated Statements Of Income [Abstract]        
Income taxes 11,611 29,184 44,773 41,220
Net income 62,642 50,210 119,528 128,958
Earnings applicable to common equity 62,436 50,004 118,909 128,339
Consolidated Statements Of Cash Flows [Abstract]        
Deferred income taxes, investment tax credits, and non-current taxes accrued     78,265 51,415
Changes in other regulatory assets     31,754 (5,648)
Other operating activities     66,809 (4,028)
Entergy Louisiana [Member]
       
Consolidated Statements Of Income [Abstract]        
Income taxes 39,143 42,628 72,061 (127,977)
Net income 100,597 80,208 207,350 244,217
Earnings applicable to common equity 98,859 78,470 202,137 239,004
Consolidated Statements Of Cash Flows [Abstract]        
Deferred income taxes, investment tax credits, and non-current taxes accrued     168,988 (94,765)
Changes in other regulatory assets     (19,483) (42,781)
Other operating activities     44,742 (82,978)
Entergy Mississippi [Member]
       
Consolidated Statements Of Income [Abstract]        
Income taxes 21,938 18,516 43,678 37,102
Net income 33,813 27,080 66,701 51,676
Earnings applicable to common equity 33,106 26,373 64,580 49,555
Consolidated Statements Of Cash Flows [Abstract]        
Deferred income taxes, investment tax credits, and non-current taxes accrued     36,845 39,703
Changes in other regulatory assets     8,153 10,526
Other operating activities     5,554 3,845
Entergy New Orleans
       
Consolidated Statements Of Income [Abstract]        
Income taxes 4,248 6,168 3,646 6,276
Net income 8,086 10,555 9,990 17,781
Earnings applicable to common equity 7,845 10,314 9,266 17,057
Consolidated Statements Of Cash Flows [Abstract]        
Deferred income taxes, investment tax credits, and non-current taxes accrued     (13,649) 12,269
Changes in other regulatory assets     13,915 (10,748)
Other operating activities     13,304 5,852
Entergy Texas [Member]
       
Consolidated Statements Of Income [Abstract]        
Income taxes 21,700 12,982 32,023 26,547
Net income 35,801 19,234 47,676 37,182
Consolidated Statements Of Cash Flows [Abstract]        
Deferred income taxes, investment tax credits, and non-current taxes accrued     78,717 28,140
Changes in other regulatory assets     78,433 72,559
Other operating activities     6,700 (255)
System Energy [Member]
       
Consolidated Statements Of Income [Abstract]        
Income taxes 10,783 20,619 48,488 44,751
Net income 35,105 30,616 90,845 92,520
Consolidated Statements Of Cash Flows [Abstract]        
Deferred income taxes, investment tax credits, and non-current taxes accrued     57,096 106,167
Changes in other regulatory assets     13,724 (38,909)
Other operating activities     $ (26,477) $ 22,502