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Redeemable Stock of Subsidiaries (Narrative) (Details) $ / shares in Units, $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2015 USD ($) quarter series $ / shares | Dec. 31, 2014 USD ($) quarter $ / shares
Temporary Equity [Line Items] |  |
Sale of Stock, Consideration Received Per Transaction | $ 460 | $ 0
Redeemable stock of subsidiaries | 538 | 78
Temporary equity carrying amount | 78 | 78
IPL Subsidiary |  |
Temporary Equity [Line Items] |  |
Temporary equity carrying amount | $ 60 | 60
Number of preferred stock series | series | 5 |
Temporary equity annual dividend requirement | $ 3 | $ 3
Number of consecutive quarters without paid dividends to invoke board of directors election rule | quarter | 4 | 4,000,000
IPL Subsidiary | Minimum |  |
Temporary Equity [Line Items] |  |
Temporary equity, redemption price per share | $ / shares | $ 100 | $ 100,000,000
IPL Subsidiary | Maximum |  |
Temporary Equity [Line Items] |  |
Temporary equity, redemption price per share | $ / shares | $ 118 | $ 118,000,000
DPL Subsidiary |  |
Temporary Equity [Line Items] |  |
Temporary equity carrying amount | $ 18 | $ 18
Number of preferred stock series | series | 3 |
Temporary equity annual dividend requirement | $ 1 | $ 1
Number of consecutive quarters without paid dividends to invoke board of directors election rule | quarter |  | 4,000,000
Number of quarters cumulative dividends in arrears to invoke board of directors election rule | quarter | 4 |
DPL Subsidiary | Minimum |  |
Temporary Equity [Line Items] |  |
Temporary equity, redemption price per share | $ / shares | $ 101 | $ 101,000,000
DPL Subsidiary | Maximum |  |
Temporary Equity [Line Items] |  |
Temporary equity, redemption price per share | $ / shares | $ 103 | $ 103,000,000
IPALCO Enterprises, Inc. [Member] |  |
Temporary Equity [Line Items] |  |
Sale of Stock, Consideration Received Per Transaction | $ 460 |
Redeemable stock of subsidiaries | 83 | $ 0
Additional Paid-in Capital [Member] | IPALCO Enterprises, Inc. [Member] |  |
Temporary Equity [Line Items] |  |
Unrealized Gain (Loss) on Investments | $ 377 | $ 0

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- Definition As of the reporting date, the aggregate carrying amount of all noncontrolling interests which are redeemable by the (parent) entity (1) at a fixed or determinable price on a fixed or determinable date, (2) at the option of the holder of the noncontrolling interest, or (3) upon occurrence of an event that is not solely within the control of the (parent) entity. This item includes noncontrolling interest holder's ownership (or holders' ownership) regardless of the type of equity interest (common, preferred, other) including all potential organizational (legal) forms of the investee entity. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 480 -SubTopic 10 -Section S99 -Paragraph 3A -Subparagraph (12)(c) -URI http://asc.fasb.org/extlink&oid=27011957&loc=SL6540498-122764 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 480 -SubTopic 10 -Section S99 -Paragraph 3A -Subparagraph (16)(c) -URI http://asc.fasb.org/extlink&oid=27011957&loc=SL6540498-122764 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 480 -SubTopic 10 -Section S99 -Paragraph 3A -Subparagraph 15 -URI http://asc.fasb.org/extlink&oid=27011957&loc=SL6540498-122764 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 480 -SubTopic 10 -Section S99 -Paragraph 3A -Subparagraph 14 -URI http://asc.fasb.org/extlink&oid=27011957&loc=SL6540498-122764 + Details
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- Definition Carrying amount, attributable to parent and noncontrolling interests, of an entity's issued and outstanding stock which is not included within permanent equity. Temporary equity is a security with redemption features that are outside the control of the issuer, is not classified as an asset or liability in conformity with GAAP, and is not mandatorily redeemable. Includes any type of security that is redeemable at a fixed or determinable price or on a fixed or determinable date or dates, is redeemable at the option of the holder, or has conditions for redemption which are not solely within the control of the issuer. Includes stock with a put option held by an ESOP and stock redeemable by a holder only in the event of a change in control of the issuer. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.27(b)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
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- Definition Amount to be paid per share that is classified as temporary equity by entity upon redemption. Temporary equity is a security with redemption features that are outside the control of the issuer, is not classified as an asset or liability in conformity with GAAP, and is not mandatorily redeemable. Includes any type of security that is redeemable at a fixed or determinable price or on a fixed or determinable date or dates, is redeemable at the option of the holder, or has conditions for redemption which are not solely within the control of the issuer. If convertible, the issuer does not control the actions or events necessary to issue the maximum number of shares that could be required to be delivered under the conversion option if the holder exercises the option to convert the stock to another class of equity. If the security is a warrant or a rights issue, the warrant or rights issue is considered to be temporary equity if the issuer cannot demonstrate that it would be able to deliver upon the exercise of the option by the holder in all cases. Includes stock with put option held by ESOP and stock redeemable by holder only in the event of a change in control of the issuer. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 480 -SubTopic 10 -Section S99 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=27011957&loc=d3e177068-122764 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (27) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
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