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v3.7.0.1

Fair Value Measurements (Narrative) (Details) | 6 Months Ended
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Jun. 30, 2017
IPL [Member] |
Cumulative preferred stock rate | 5.10%

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- Definition The percentage rate used to calculate dividend payments on preferred stock. + References No definition available. + Details
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Period Type: | duration

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- Details
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Data Type: | na
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