Pension And Other Postretirement Benefits (Schedule Of Asset Allocation Guidelines) (Details)	12 Months Ended
Dec. 31, 2014
Equity Securities [Member]
Defined Benefit Plan Disclosure [Line Items]
Target Allocation	60.00%
Equity Securities [Member] \| Indianapolis Power And Light Company [Member]
Defined Benefit Plan Disclosure [Line Items]
Target Allocation	60.00%
Debt Securities [Member]
Defined Benefit Plan Disclosure [Line Items]
Target Allocation	40.00%
Debt Securities [Member] \| Indianapolis Power And Light Company [Member]
Defined Benefit Plan Disclosure [Line Items]
Target Allocation	40.00%

Target allocation of investments of this type to total plan assets presented on a weighted average basis.

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 715

-SubTopic 20

-Section 50

-Paragraph 5

-Subparagraph (c)(i)

-URI http://asc.fasb.org/extlink&oid=58740216&loc=d3e2446-114920

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 715

-SubTopic 20

-Section 50

-Paragraph 1

-Subparagraph (d)(i)

-URI http://asc.fasb.org/extlink&oid=58740216&loc=d3e1928-114920

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Namespace Prefix:	us-gaap_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration