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Receivables (Additional Attributes Of Receivables Sold Under The Agreement) (Details) (IPL [Member], USD $)
In Millions, unless otherwise specified |
3 Months Ended | 9 Months Ended | ||
|---|---|---|---|---|
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Sep. 30, 2012
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Sep. 30, 2011
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Sep. 30, 2012
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Sep. 30, 2011
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IPL [Member]
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| Accounts, Notes, Loans and Financing Receivable [Line Items] | ||||
| Collections reinvested in receivables | $ 522.9 | $ 482.3 | $ 1,334.7 | $ 1,367.8 |
| Credit losses, net of recoveries | $ 3.0 | $ 3.4 | $ 7.3 | $ 7.9 |