Redeemable Preferred Stock (Tables)

12 Months Ended

Dec. 31, 2016

Class of Stock [Line Items]

Schedule of Carrying Value of Cumulative Preferred Stock

Information related to the carrying value of IPL’s cumulative preferred stock at December 31 was as follows:

Series	Liquidation Preference/Stated Value	Shares Authorized	Shares Outstanding	2016		2015
				(in millions)
5.1%	$25	8,000,000	8,000,000		$200.0		$200.0

IPL [Member]

Class of Stock [Line Items]

Schedule of Carrying Value of Cumulative Preferred Stock

Information related to the carrying value of IPL’s cumulative preferred stock at December 31 was as follows:

Series	Liquidation Preference/Stated Value	Shares Authorized	Shares Outstanding	2016		2015
				(in millions)
5.1%	$25	8,000,000	8,000,000		$200.0		$200.0