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Summary Of Significant Accounting Policies (Tables)
12 Months Ended
Dec. 31, 2012
Schedule Of Net Property, Plant, And Equipment
Schedule Of Subsidiaries' Investment And Accumulated Depreciation In Generating Stations
Schedule Of Earnings Per Share, Basic And Diluted
Significant Unobervable Inputs in Asset Valuation




Significant Unobservable Inputs




Range

Weighted Average

 

 

 

Weighted average cost of capital

7.5%-8.0%

7.8%

Long-term pre-tax operating margin (cash basis)

6.1%-7.8%

7.2%

Entergy Arkansas [Member]
 
Schedule Of Net Property, Plant, And Equipment
Schedule Of Depreciation Rates On Average Depreciable Property

 

 


Entergy
Arkansas

 

Entergy
Gulf States
Louisiana

 


Entergy
Louisiana

 


Entergy
Mississippi

 


Entergy
New Orleans

 


Entergy
Texas

 


System
Energy

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

2012

 

2.5%

 

1.8%

 

2.4%

 

2.6%

 

3.0%

 

2.4%

 

2.8%

2011

 

2.6%

 

1.8%

 

2.5%

 

2.6%

 

3.0%

 

2.2%

 

2.8%

2010

 

2.9%

 

1.8%

 

2.4%

 

2.6%

 

3.1%

 

2.3%

 

2.9%

Schedule Of Subsidiaries' Investment And Accumulated Depreciation In Generating Stations
Entergy Gulf States Louisiana [Member]
 
Schedule Of Net Property, Plant, And Equipment
Schedule Of Depreciation Rates On Average Depreciable Property

 

 


Entergy
Arkansas

 

Entergy
Gulf States
Louisiana

 


Entergy
Louisiana

 


Entergy
Mississippi

 


Entergy
New Orleans

 


Entergy
Texas

 


System
Energy

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

2012

 

2.5%

 

1.8%

 

2.4%

 

2.6%

 

3.0%

 

2.4%

 

2.8%

2011

 

2.6%

 

1.8%

 

2.5%

 

2.6%

 

3.0%

 

2.2%

 

2.8%

2010

 

2.9%

 

1.8%

 

2.4%

 

2.6%

 

3.1%

 

2.3%

 

2.9%

Schedule Of Subsidiaries' Investment And Accumulated Depreciation In Generating Stations
Entergy Louisiana [Member]
 
Schedule Of Net Property, Plant, And Equipment
Schedule Of Depreciation Rates On Average Depreciable Property

 

 


Entergy
Arkansas

 

Entergy
Gulf States
Louisiana

 


Entergy
Louisiana

 


Entergy
Mississippi

 


Entergy
New Orleans

 


Entergy
Texas

 


System
Energy

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

2012

 

2.5%

 

1.8%

 

2.4%

 

2.6%

 

3.0%

 

2.4%

 

2.8%

2011

 

2.6%

 

1.8%

 

2.5%

 

2.6%

 

3.0%

 

2.2%

 

2.8%

2010

 

2.9%

 

1.8%

 

2.4%

 

2.6%

 

3.1%

 

2.3%

 

2.9%

Schedule Of Subsidiaries' Investment And Accumulated Depreciation In Generating Stations
Entergy Mississippi [Member]
 
Schedule Of Net Property, Plant, And Equipment
Schedule Of Depreciation Rates On Average Depreciable Property

 

 


Entergy
Arkansas

 

Entergy
Gulf States
Louisiana

 


Entergy
Louisiana

 


Entergy
Mississippi

 


Entergy
New Orleans

 


Entergy
Texas

 


System
Energy

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

2012

 

2.5%

 

1.8%

 

2.4%

 

2.6%

 

3.0%

 

2.4%

 

2.8%

2011

 

2.6%

 

1.8%

 

2.5%

 

2.6%

 

3.0%

 

2.2%

 

2.8%

2010

 

2.9%

 

1.8%

 

2.4%

 

2.6%

 

3.1%

 

2.3%

 

2.9%

Schedule Of Subsidiaries' Investment And Accumulated Depreciation In Generating Stations
Entergy New Orleans [Member]
 
Schedule Of Net Property, Plant, And Equipment
Schedule Of Depreciation Rates On Average Depreciable Property

 

 


Entergy
Arkansas

 

Entergy
Gulf States
Louisiana

 


Entergy
Louisiana

 


Entergy
Mississippi

 


Entergy
New Orleans

 


Entergy
Texas

 


System
Energy

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

2012

 

2.5%

 

1.8%

 

2.4%

 

2.6%

 

3.0%

 

2.4%

 

2.8%

2011

 

2.6%

 

1.8%

 

2.5%

 

2.6%

 

3.0%

 

2.2%

 

2.8%

2010

 

2.9%

 

1.8%

 

2.4%

 

2.6%

 

3.1%

 

2.3%

 

2.9%

Entergy Texas [Member]
 
Schedule Of Net Property, Plant, And Equipment
Schedule Of Depreciation Rates On Average Depreciable Property

 

 


Entergy
Arkansas

 

Entergy
Gulf States
Louisiana

 


Entergy
Louisiana

 


Entergy
Mississippi

 


Entergy
New Orleans

 


Entergy
Texas

 


System
Energy

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

2012

 

2.5%

 

1.8%

 

2.4%

 

2.6%

 

3.0%

 

2.4%

 

2.8%

2011

 

2.6%

 

1.8%

 

2.5%

 

2.6%

 

3.0%

 

2.2%

 

2.8%

2010

 

2.9%

 

1.8%

 

2.4%

 

2.6%

 

3.1%

 

2.3%

 

2.9%

Schedule Of Subsidiaries' Investment And Accumulated Depreciation In Generating Stations
System Energy [Member]
 
Schedule Of Net Property, Plant, And Equipment
Schedule Of Depreciation Rates On Average Depreciable Property

 

 


Entergy
Arkansas

 

Entergy
Gulf States
Louisiana

 


Entergy
Louisiana

 


Entergy
Mississippi

 


Entergy
New Orleans

 


Entergy
Texas

 


System
Energy

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

2012

 

2.5%

 

1.8%

 

2.4%

 

2.6%

 

3.0%

 

2.4%

 

2.8%

2011

 

2.6%

 

1.8%

 

2.5%

 

2.6%

 

3.0%

 

2.2%

 

2.8%

2010

 

2.9%

 

1.8%

 

2.4%

 

2.6%

 

3.1%

 

2.3%

 

2.9%

Schedule Of Subsidiaries' Investment And Accumulated Depreciation In Generating Stations