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Summary Of Significant Accounting Policies (Policy)
12 Months Ended
Dec. 31, 2012
Use Of Estimates In Preparation Of Financial Statements
Revenues And Fuel Costs
Property, Plant, And Equipment
Jointly-Owned Generating Stations
Nuclear Refueling Outage Costs
Allowance For Funds Used During Construction (AFUDC)
Income Taxes
Earnings Per Share
Stock-Based Compensation Plans
Accounting For The Effects Of Regulation
Cash And Cash Equivalents
Allownce For Doubtful Accounts
Investments
Equity Method Investments
Derivative Financial Instruments And Commodity Derivatives
Fair Values
Impairment Of Long-Lived Assets
River Bend AFUDC
Reacquired Debt
Taxes Imposed On Revenue-Producing Transactions
Presentation Of Preferred Stock Without Sinking Fund
New Accounting Pronouncements
Entergy Arkansas [Member]
 
Use Of Estimates In Preparation Of Financial Statements
Revenues And Fuel Costs
Property, Plant, And Equipment
Jointly-Owned Generating Stations
Nuclear Refueling Outage Costs
Allowance For Funds Used During Construction (AFUDC)
Income Taxes
Stock-Based Compensation Plans
Accounting For The Effects Of Regulation
Cash And Cash Equivalents
Allownce For Doubtful Accounts
Investments
Equity Method Investments
Derivative Financial Instruments And Commodity Derivatives
Fair Values
Impairment Of Long-Lived Assets
River Bend AFUDC
Reacquired Debt
Taxes Imposed On Revenue-Producing Transactions
Presentation Of Preferred Stock Without Sinking Fund
New Accounting Pronouncements
Entergy Gulf States Louisiana [Member]
 
Use Of Estimates In Preparation Of Financial Statements
Revenues And Fuel Costs
Property, Plant, And Equipment
Jointly-Owned Generating Stations
Nuclear Refueling Outage Costs
Allowance For Funds Used During Construction (AFUDC)
Income Taxes
Stock-Based Compensation Plans
Accounting For The Effects Of Regulation
Cash And Cash Equivalents
Allownce For Doubtful Accounts
Investments
Equity Method Investments
Derivative Financial Instruments And Commodity Derivatives
Fair Values
Impairment Of Long-Lived Assets
River Bend AFUDC
Reacquired Debt
Taxes Imposed On Revenue-Producing Transactions
Presentation Of Preferred Stock Without Sinking Fund
New Accounting Pronouncements
Entergy Louisiana [Member]
 
Use Of Estimates In Preparation Of Financial Statements
Revenues And Fuel Costs
Property, Plant, And Equipment
Jointly-Owned Generating Stations
Nuclear Refueling Outage Costs
Allowance For Funds Used During Construction (AFUDC)
Income Taxes
Stock-Based Compensation Plans
Accounting For The Effects Of Regulation
Cash And Cash Equivalents
Allownce For Doubtful Accounts
Investments
Equity Method Investments
Derivative Financial Instruments And Commodity Derivatives
Fair Values
Impairment Of Long-Lived Assets
River Bend AFUDC
Reacquired Debt
Taxes Imposed On Revenue-Producing Transactions
Presentation Of Preferred Stock Without Sinking Fund
New Accounting Pronouncements
Entergy Mississippi [Member]
 
Use Of Estimates In Preparation Of Financial Statements
Revenues And Fuel Costs
Property, Plant, And Equipment
Jointly-Owned Generating Stations
Nuclear Refueling Outage Costs
Allowance For Funds Used During Construction (AFUDC)
Income Taxes
Stock-Based Compensation Plans
Accounting For The Effects Of Regulation
Cash And Cash Equivalents
Allownce For Doubtful Accounts
Investments
Equity Method Investments
Derivative Financial Instruments And Commodity Derivatives
Fair Values
Impairment Of Long-Lived Assets
River Bend AFUDC
Reacquired Debt
Taxes Imposed On Revenue-Producing Transactions
Presentation Of Preferred Stock Without Sinking Fund
New Accounting Pronouncements
Entergy New Orleans [Member]
 
Use Of Estimates In Preparation Of Financial Statements
Revenues And Fuel Costs
Property, Plant, And Equipment
Jointly-Owned Generating Stations
Nuclear Refueling Outage Costs
Allowance For Funds Used During Construction (AFUDC)
Income Taxes
Stock-Based Compensation Plans
Accounting For The Effects Of Regulation
Cash And Cash Equivalents
Allownce For Doubtful Accounts
Investments
Equity Method Investments
Derivative Financial Instruments And Commodity Derivatives
Fair Values
Impairment Of Long-Lived Assets
River Bend AFUDC
Reacquired Debt
Taxes Imposed On Revenue-Producing Transactions
Presentation Of Preferred Stock Without Sinking Fund
New Accounting Pronouncements
Entergy Texas [Member]
 
Use Of Estimates In Preparation Of Financial Statements
Revenues And Fuel Costs
Property, Plant, And Equipment
Jointly-Owned Generating Stations
Nuclear Refueling Outage Costs
Allowance For Funds Used During Construction (AFUDC)
Income Taxes
Stock-Based Compensation Plans
Accounting For The Effects Of Regulation
Cash And Cash Equivalents
Allownce For Doubtful Accounts
Investments
Equity Method Investments
Derivative Financial Instruments And Commodity Derivatives
Fair Values
Impairment Of Long-Lived Assets
River Bend AFUDC
Reacquired Debt
Taxes Imposed On Revenue-Producing Transactions
Presentation Of Preferred Stock Without Sinking Fund
New Accounting Pronouncements
System Energy [Member]
 
Use Of Estimates In Preparation Of Financial Statements
Revenues And Fuel Costs
Property, Plant, And Equipment
Jointly-Owned Generating Stations
Nuclear Refueling Outage Costs
Allowance For Funds Used During Construction (AFUDC)
Income Taxes
Stock-Based Compensation Plans
Accounting For The Effects Of Regulation
Cash And Cash Equivalents
Allownce For Doubtful Accounts
Investments
Equity Method Investments
Derivative Financial Instruments And Commodity Derivatives
Fair Values
Impairment Of Long-Lived Assets
River Bend AFUDC
Reacquired Debt
Taxes Imposed On Revenue-Producing Transactions
Presentation Of Preferred Stock Without Sinking Fund
New Accounting Pronouncements