Debt

9 Months Ended

Sep. 30, 2016

Debt [Line Items]

Debt

DEBT

NOTE 7(a) Short-term Debt - Information regarding commercial paper classified as short-term debt was as follows (dollars in millions):

	Alliant Energy	Parent
September 30, 2016	(Consolidated)	Company	IPL	WPL
Commercial paper:
Amount outstanding	$238.3	$226.5	$—	$11.8
Weighted average remaining maturity	4 days	4 days	N/A	3 days
Weighted average interest rates	0.6%	0.7%	N/A	0.4%
Available credit facility capacity	$761.7	$73.5	$300.0	$388.2

	Alliant Energy						IPL						WPL
Three Months Ended September 30	2016			2015			2016			2015			2016	2015
Maximum amount outstanding (based on daily outstanding balances)		$248.0			$181.2			$3.1			$18.4		$55.4	$—
Average amount outstanding (based on daily outstanding balances)		$220.1			$122.4			$0.1			$0.5		$36.4	$—
Weighted average interest rates	0.6		%	0.4		%	0.6		%	0.4		%	0.4%	N/A
Nine Months Ended September 30
Maximum amount outstanding (based on daily outstanding balances)		$248.0			$181.2			$3.1			$18.4		$62.9	$—
Average amount outstanding (based on daily outstanding balances)		$210.7			$114.5			$—			$0.2		$33.2	$—
Weighted average interest rates	0.6		%	0.4		%	0.6		%	0.4		%	0.4%	N/A

NOTE 7(b) Long-term Debt - In September 2016, IPL issued $300 million of 3.7% senior debentures due 2046. The proceeds from the issuance were used by IPL to reduce cash amounts received from its sales of accounts receivable program, reduce commercial paper classified as long-term debt by $100 million and for general corporate purposes.

In October 2016, AEF entered into a $500 million variable-rate (1.3% at October 31, 2016) term loan credit agreement and used the proceeds from borrowings under this agreement to retire borrowings under Alliant Energy’s and Franklin County Holdings LLC’s variable-rate term loan credit agreements that matured in 2016, reduce outstanding commercial paper and for general corporate purposes. AEF’s term loan credit agreement expires in October 2018 and includes substantially the same financial covenants that are included in Alliant Energy’s credit facility agreement.

IPL [Member]

Debt [Line Items]

Debt

DEBT

NOTE 7(a) Short-term Debt - Information regarding commercial paper classified as short-term debt was as follows (dollars in millions):

	Alliant Energy	Parent
September 30, 2016	(Consolidated)	Company	IPL	WPL
Commercial paper:
Amount outstanding	$238.3	$226.5	$—	$11.8
Weighted average remaining maturity	4 days	4 days	N/A	3 days
Weighted average interest rates	0.6%	0.7%	N/A	0.4%
Available credit facility capacity	$761.7	$73.5	$300.0	$388.2

	Alliant Energy						IPL						WPL
Three Months Ended September 30	2016			2015			2016			2015			2016	2015
Maximum amount outstanding (based on daily outstanding balances)		$248.0			$181.2			$3.1			$18.4		$55.4	$—
Average amount outstanding (based on daily outstanding balances)		$220.1			$122.4			$0.1			$0.5		$36.4	$—
Weighted average interest rates	0.6		%	0.4		%	0.6		%	0.4		%	0.4%	N/A
Nine Months Ended September 30
Maximum amount outstanding (based on daily outstanding balances)		$248.0			$181.2			$3.1			$18.4		$62.9	$—
Average amount outstanding (based on daily outstanding balances)		$210.7			$114.5			$—			$0.2		$33.2	$—
Weighted average interest rates	0.6		%	0.4		%	0.6		%	0.4		%	0.4%	N/A

NOTE 7(b) Long-term Debt - In September 2016, IPL issued $300 million of 3.7% senior debentures due 2046. The proceeds from the issuance were used by IPL to reduce cash amounts received from its sales of accounts receivable program, reduce commercial paper classified as long-term debt by $100 million and for general corporate purposes.

WPL [Member]

Debt [Line Items]

Debt

DEBT

NOTE 7(a) Short-term Debt - Information regarding commercial paper classified as short-term debt was as follows (dollars in millions):

	Alliant Energy	Parent
September 30, 2016	(Consolidated)	Company	IPL	WPL
Commercial paper:
Amount outstanding	$238.3	$226.5	$—	$11.8
Weighted average remaining maturity	4 days	4 days	N/A	3 days
Weighted average interest rates	0.6%	0.7%	N/A	0.4%
Available credit facility capacity	$761.7	$73.5	$300.0	$388.2

	Alliant Energy						IPL						WPL
Three Months Ended September 30	2016			2015			2016			2015			2016	2015
Maximum amount outstanding (based on daily outstanding balances)		$248.0			$181.2			$3.1			$18.4		$55.4	$—
Average amount outstanding (based on daily outstanding balances)		$220.1			$122.4			$0.1			$0.5		$36.4	$—
Weighted average interest rates	0.6		%	0.4		%	0.6		%	0.4		%	0.4%	N/A
Nine Months Ended September 30
Maximum amount outstanding (based on daily outstanding balances)		$248.0			$181.2			$3.1			$18.4		$62.9	$—
Average amount outstanding (based on daily outstanding balances)		$210.7			$114.5			$—			$0.2		$33.2	$—
Weighted average interest rates	0.6		%	0.4		%	0.6		%	0.4		%	0.4%	N/A