Debt

3 Months Ended

Mar. 31, 2014

DEBT

Short-term Debt - Information regarding commercial paper classified as short-term debt and back-stopped by the credit facilities was as follows (dollars in millions):



	Alliant Energy	Parent
March 31, 2014	(Consolidated)	Company	IPL	WPL
Commercial paper:
Amount outstanding	$221.3	$65.8	$—	$155.5
Weighted average remaining maturity	1 day	1 day	N/A	2 days
Weighted average interest rates	0.1%	0.2%	N/A	0.1%
Available credit facility capacity	$778.7	$234.2	$300.0	$244.5



	Alliant Energy						IPL						WPL
Three Months Ended March 31	2014			2013			2014			2013			2014			2013
Maximum amount outstanding (based on daily outstanding balances)		$316.2			$243.4			$10.0			$26.3			$204.7			$160.0
Average amount outstanding (based on daily outstanding balances)		$275.6			$170.8			$0.3			$4.8			$173.0			$72.9
Weighted average interest rates	0.1		%	0.3		%	0.2		%	0.4		%	0.1		%	0.2		%

IPL [Member]

Debt Instrument [Line Items]

Debt

DEBT

Short-term Debt - Information regarding commercial paper classified as short-term debt and back-stopped by the credit facilities was as follows (dollars in millions):



	Alliant Energy	Parent
March 31, 2014	(Consolidated)	Company	IPL	WPL
Commercial paper:
Amount outstanding	$221.3	$65.8	$—	$155.5
Weighted average remaining maturity	1 day	1 day	N/A	2 days
Weighted average interest rates	0.1%	0.2%	N/A	0.1%
Available credit facility capacity	$778.7	$234.2	$300.0	$244.5



	Alliant Energy						IPL						WPL
Three Months Ended March 31	2014			2013			2014			2013			2014			2013
Maximum amount outstanding (based on daily outstanding balances)		$316.2			$243.4			$10.0			$26.3			$204.7			$160.0
Average amount outstanding (based on daily outstanding balances)		$275.6			$170.8			$0.3			$4.8			$173.0			$72.9
Weighted average interest rates	0.1		%	0.3		%	0.2		%	0.4		%	0.1		%	0.2		%

WPL [Member]

Debt Instrument [Line Items]

Debt

DEBT

Short-term Debt - Information regarding commercial paper classified as short-term debt and back-stopped by the credit facilities was as follows (dollars in millions):



	Alliant Energy	Parent
March 31, 2014	(Consolidated)	Company	IPL	WPL
Commercial paper:
Amount outstanding	$221.3	$65.8	$—	$155.5
Weighted average remaining maturity	1 day	1 day	N/A	2 days
Weighted average interest rates	0.1%	0.2%	N/A	0.1%
Available credit facility capacity	$778.7	$234.2	$300.0	$244.5



	Alliant Energy						IPL						WPL
Three Months Ended March 31	2014			2013			2014			2013			2014			2013
Maximum amount outstanding (based on daily outstanding balances)		$316.2			$243.4			$10.0			$26.3			$204.7			$160.0
Average amount outstanding (based on daily outstanding balances)		$275.6			$170.8			$0.3			$4.8			$173.0			$72.9
Weighted average interest rates	0.1		%	0.3		%	0.2		%	0.4		%	0.1		%	0.2		%

- Definition

The entire disclosure for information about short-term and long-term debt arrangements, which includes amounts of borrowings under each line of credit, note payable, commercial paper issue, bonds indenture, debenture issue, own-share lending arrangements and any other contractual agreement to repay funds, and about the underlying arrangements, rationale for a classification as long-term, including repayment terms, interest rates, collateral provided, restrictions on use of assets and activities, whether or not in compliance with debt covenants, and other matters important to users of the financial statements, such as the effects of refinancing and noncompliance with debt covenants.

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