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Revolving Credit Facilities, Lines Of Credit And Short-Term Borrowings (Short-Term Borrowings And The Outstanding Short-Term Borrowings) (Details) (USD $) | Mar. 31, 2014
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Entergy Arkansas [Member] |
Short-term borrowings and the outstanding short-term borrowings |
Authorized | $ 250,000,000
Borrowings | 0
Entergy Gulf States Louisiana [Member] |
Short-term borrowings and the outstanding short-term borrowings |
Authorized | 200,000,000
Borrowings | 0
Entergy Louisiana [Member] |
Short-term borrowings and the outstanding short-term borrowings |
Authorized | 250,000,000
Borrowings | 0
Entergy Mississippi [Member] |
Short-term borrowings and the outstanding short-term borrowings |
Authorized | 175,000,000
Borrowings | 0
Entergy New Orleans [Member] |
Short-term borrowings and the outstanding short-term borrowings |
Authorized | 100,000,000
Borrowings | 0
Entergy Texas [Member] |
Short-term borrowings and the outstanding short-term borrowings |
Authorized | 200,000,000
Borrowings | 39,000,000
System Energy [Member] |
Short-term borrowings and the outstanding short-term borrowings |
Authorized | 200,000,000
Borrowings | $ 0

X
- Definition Authorized short-term borrowings. + References No definition available. + Details
Name: | etr_AuthorizedShortTermBorrowings
Namespace Prefix: | etr_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Total amount of money pool and external short-term borrowings. + References No definition available. + Details
Name: | etr_ShortTermBorrowing
Namespace Prefix: | etr_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Details
Name: | etr_ShortTermBorrowingsAndOutstandingShortTermBorrowingsAbstract
Namespace Prefix: | etr_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration