Debt (Tables)

12 Months Ended

Dec. 31, 2013

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



	Alliant Energy		IPL		WPL
	2013	2012	2013	2012	2013	2012
December 31
Commercial paper:
Amount outstanding	$279.4	$217.5	$—	$26.3	$183.7	$86.6
Weighted average interest rates	0.2%	0.4%	N/A	0.4%	0.1%	0.3%
Weighted average remaining maturity	4 days	11 days	N/A	2 days	6 days	19 days
Available credit facility capacity (a)	$720.6	$732.5	$300.0	$223.7	$216.3	$313.4



	Alliant Energy		IPL		WPL
	2013	2012	2013	2012	2013	2012
For the year ended
Maximum amount outstanding (based on daily outstanding balances)	$293.9	$217.5	$26.3	$35.4	$190.0	$86.6
Average amount outstanding (based on daily outstanding balances)	$210.5	$99.8	$1.3	$5.9	$123.5	$11.7
Weighted average interest rates	0.2%	0.4%	0.4%	0.4%	0.2%	0.3%

(a)

At December 31, 2012, Alliant Energy’s and IPL’s available credit facility capacities reflect outstanding commercial paper classified as both short- and long-term debt. Refer to Note 9(b) for further discussion of $50.0 million of commercial paper outstanding at December 31, 2012 classified as long-term debt on Alliant Energy’s and IPL’s Consolidated Balance Sheets. Alliant Energy and its subsidiaries did not have any commercial paper classified as long-term debt as of December 31, 2013.

Schedule of Debt-To-Capital Ratios

The required debt-to-capital ratios compared to the actual debt-to-capital ratios at December 31, 2013 were as follows:



	Alliant Energy	IPL	WPL
Requirement	Less than 65%	Less than 58%	Less than 58%
Actual	51%	45%	50%

Schedule of Long-term Debt

Long-term debt, net as of December 31 was as follows (dollars in millions):



	2013									2012
	Alliant Energy			IPL			WPL			Alliant Energy			IPL			WPL
Senior Debentures:
3.3%, due 2015		$150.0			$150.0			$—			$150.0			$150.0			$—
5.875%, due 2018	100.0			100.0			—			100.0			100.0			—
7.25%, due 2018	250.0			250.0			—			250.0			250.0			—
3.65%, due 2020	200.0			200.0			—			200.0			200.0			—
5.5%, due 2025	50.0			50.0			—			50.0			50.0			—
6.45%, due 2033	100.0			100.0			—			100.0			100.0			—
6.3%, due 2034	125.0			125.0			—			125.0			125.0			—
6.25%, due 2039	300.0			300.0			—			300.0			300.0			—
4.7%, due 2043 (a)	250.0			250.0			—			—			—			—
	1,525.0			1,525.0			—			1,275.0			1,275.0			—
Debentures:
5%, due 2019	250.0			—			250.0			250.0			—			250.0
4.6%, due 2020	150.0			—			150.0			150.0			—			150.0
2.25%, due 2022	250.0			—			250.0			250.0			—			250.0
6.25%, due 2034	100.0			—			100.0			100.0			—			100.0
6.375%, due 2037	300.0			—			300.0			300.0			—			300.0
7.6%, due 2038	250.0			—			250.0			250.0			—			250.0
	1,300.0			—			1,300.0			1,300.0			—			1,300.0
Pollution Control Revenue Bonds:
5%, due 2014	38.4			38.4			—			38.4			38.4			—
5%, due 2014 and 2015	24.5			—			24.5			24.5			—			24.5
5.375%, due 2015	14.6			—			14.6			14.6			—			14.6
	77.5			38.4			39.1			77.5			38.4			39.1
Other:
Commercial paper, 0.4% at December 31, 2012 (b)	—			—			—			50.0			50.0			—
4% senior notes, due 2014	250.0			—			—			250.0			—			—
Term loan credit agreement through 2014, 1% at December 31, 2013	60.0			—			—			60.0			—			—
3.45% senior notes, due 2022	75.0			—			—			75.0			—			—
5.06% senior secured notes, due 2014 to 2024	60.5			—			—			61.9			—			—
Other, 1% at December 31, 2013, due 2014 to 2025	0.4			—			—			0.5			—			—
	445.9			—			—			497.4			50.0			—
Subtotal	3,348.4			1,563.4			1,339.1			3,149.9			1,363.4			1,339.1
Current maturities	(358.5		)	(38.4		)	(8.5		)	(1.5		)	—			—
Unamortized debt (discount) and premium, net	(12.1		)	(5.0		)	(7.0		)	(11.8		)	(3.9		)	(7.6		)
Long-term debt, net		$2,977.8			$1,520.0			$1,323.6			$3,136.6			$1,359.5			$1,331.5


(a)	In 2013, IPL issued $250.0 million of 4.7% senior debentures due 2043. The proceeds from the issuance were used by IPL to reduce cash proceeds received from its sales of accounts receivable program, reduce commercial paper classified as long-term debt by $65 million and for general working capital purposes.


(b)	At December 31, 2012, $50.0 million of commercial paper was recorded in “Long-term debt, net” on Alliant Energy’s and IPL’s Consolidated Balance Sheets due to the existence of long-term credit facilities that back-stop this commercial paper balance, along with Alliant Energy’s and IPL’s intent and ability to refinance these balances on a long-term basis.

Schedule of Debt Maturities

At December 31, 2013, debt maturities for 2014 to 2018 were as follows (in millions):



	2014		2015		2016		2017		2018
IPL		$38		$150		$—		$—		$350
WPL	9		31		—		—		—
Resources	62		2		3		4		5
Alliant Energy parent company	250		—		—		—		—
Alliant Energy		$359		$183		$3		$4		$355

Unamortized Debt Issuance Costs

Unamortized debt issuance costs recorded in “Deferred charges and other” on the Consolidated Balance Sheets at December 31 were as follows (in millions):



	Alliant Energy		IPL		WPL
	2013	2012	2013	2012	2013	2012
Unamortized debt issuance costs	$19.9	$19.5	$9.7	$8.0	$9.0	$9.8

IPL [Member]

Debt Disclosure [Line Items]

Other Short-Term Borrowings

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



	Alliant Energy		IPL		WPL
	2013	2012	2013	2012	2013	2012
December 31
Commercial paper:
Amount outstanding	$279.4	$217.5	$—	$26.3	$183.7	$86.6
Weighted average interest rates	0.2%	0.4%	N/A	0.4%	0.1%	0.3%
Weighted average remaining maturity	4 days	11 days	N/A	2 days	6 days	19 days
Available credit facility capacity (a)	$720.6	$732.5	$300.0	$223.7	$216.3	$313.4



	Alliant Energy		IPL		WPL
	2013	2012	2013	2012	2013	2012
For the year ended
Maximum amount outstanding (based on daily outstanding balances)	$293.9	$217.5	$26.3	$35.4	$190.0	$86.6
Average amount outstanding (based on daily outstanding balances)	$210.5	$99.8	$1.3	$5.9	$123.5	$11.7
Weighted average interest rates	0.2%	0.4%	0.4%	0.4%	0.2%	0.3%

(a)

Schedule of Debt-To-Capital Ratios

The required debt-to-capital ratios compared to the actual debt-to-capital ratios at December 31, 2013 were as follows:



	Alliant Energy	IPL	WPL
Requirement	Less than 65%	Less than 58%	Less than 58%
Actual	51%	45%	50%

Schedule of Long-term Debt

Long-term debt, net as of December 31 was as follows (dollars in millions):



	2013									2012
	Alliant Energy			IPL			WPL			Alliant Energy			IPL			WPL
Senior Debentures:
3.3%, due 2015		$150.0			$150.0			$—			$150.0			$150.0			$—
5.875%, due 2018	100.0			100.0			—			100.0			100.0			—
7.25%, due 2018	250.0			250.0			—			250.0			250.0			—
3.65%, due 2020	200.0			200.0			—			200.0			200.0			—
5.5%, due 2025	50.0			50.0			—			50.0			50.0			—
6.45%, due 2033	100.0			100.0			—			100.0			100.0			—
6.3%, due 2034	125.0			125.0			—			125.0			125.0			—
6.25%, due 2039	300.0			300.0			—			300.0			300.0			—
4.7%, due 2043 (a)	250.0			250.0			—			—			—			—
	1,525.0			1,525.0			—			1,275.0			1,275.0			—
Debentures:
5%, due 2019	250.0			—			250.0			250.0			—			250.0
4.6%, due 2020	150.0			—			150.0			150.0			—			150.0
2.25%, due 2022	250.0			—			250.0			250.0			—			250.0
6.25%, due 2034	100.0			—			100.0			100.0			—			100.0
6.375%, due 2037	300.0			—			300.0			300.0			—			300.0
7.6%, due 2038	250.0			—			250.0			250.0			—			250.0
	1,300.0			—			1,300.0			1,300.0			—			1,300.0
Pollution Control Revenue Bonds:
5%, due 2014	38.4			38.4			—			38.4			38.4			—
5%, due 2014 and 2015	24.5			—			24.5			24.5			—			24.5
5.375%, due 2015	14.6			—			14.6			14.6			—			14.6
	77.5			38.4			39.1			77.5			38.4			39.1
Other:
Commercial paper, 0.4% at December 31, 2012 (b)	—			—			—			50.0			50.0			—
4% senior notes, due 2014	250.0			—			—			250.0			—			—
Term loan credit agreement through 2014, 1% at December 31, 2013	60.0			—			—			60.0			—			—
3.45% senior notes, due 2022	75.0			—			—			75.0			—			—
5.06% senior secured notes, due 2014 to 2024	60.5			—			—			61.9			—			—
Other, 1% at December 31, 2013, due 2014 to 2025	0.4			—			—			0.5			—			—
	445.9			—			—			497.4			50.0			—
Subtotal	3,348.4			1,563.4			1,339.1			3,149.9			1,363.4			1,339.1
Current maturities	(358.5		)	(38.4		)	(8.5		)	(1.5		)	—			—
Unamortized debt (discount) and premium, net	(12.1		)	(5.0		)	(7.0		)	(11.8		)	(3.9		)	(7.6		)
Long-term debt, net		$2,977.8			$1,520.0			$1,323.6			$3,136.6			$1,359.5			$1,331.5


(a)	In 2013, IPL issued $250.0 million of 4.7% senior debentures due 2043. The proceeds from the issuance were used by IPL to reduce cash proceeds received from its sales of accounts receivable program, reduce commercial paper classified as long-term debt by $65 million and for general working capital purposes.


(b)	At December 31, 2012, $50.0 million of commercial paper was recorded in “Long-term debt, net” on Alliant Energy’s and IPL’s Consolidated Balance Sheets due to the existence of long-term credit facilities that back-stop this commercial paper balance, along with Alliant Energy’s and IPL’s intent and ability to refinance these balances on a long-term basis.

Schedule of Debt Maturities

At December 31, 2013, debt maturities for 2014 to 2018 were as follows (in millions):



	2014		2015		2016		2017		2018
IPL		$38		$150		$—		$—		$350
WPL	9		31		—		—		—
Resources	62		2		3		4		5
Alliant Energy parent company	250		—		—		—		—
Alliant Energy		$359		$183		$3		$4		$355

Unamortized Debt Issuance Costs

Unamortized debt issuance costs recorded in “Deferred charges and other” on the Consolidated Balance Sheets at December 31 were as follows (in millions):



	Alliant Energy		IPL		WPL
	2013	2012	2013	2012	2013	2012
Unamortized debt issuance costs	$19.9	$19.5	$9.7	$8.0	$9.0	$9.8

WPL [Member]

Debt Disclosure [Line Items]

Other Short-Term Borrowings

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



	Alliant Energy		IPL		WPL
	2013	2012	2013	2012	2013	2012
December 31
Commercial paper:
Amount outstanding	$279.4	$217.5	$—	$26.3	$183.7	$86.6
Weighted average interest rates	0.2%	0.4%	N/A	0.4%	0.1%	0.3%
Weighted average remaining maturity	4 days	11 days	N/A	2 days	6 days	19 days
Available credit facility capacity (a)	$720.6	$732.5	$300.0	$223.7	$216.3	$313.4



	Alliant Energy		IPL		WPL
	2013	2012	2013	2012	2013	2012
For the year ended
Maximum amount outstanding (based on daily outstanding balances)	$293.9	$217.5	$26.3	$35.4	$190.0	$86.6
Average amount outstanding (based on daily outstanding balances)	$210.5	$99.8	$1.3	$5.9	$123.5	$11.7
Weighted average interest rates	0.2%	0.4%	0.4%	0.4%	0.2%	0.3%

(a)

Schedule of Debt-To-Capital Ratios

The required debt-to-capital ratios compared to the actual debt-to-capital ratios at December 31, 2013 were as follows:



	Alliant Energy	IPL	WPL
Requirement	Less than 65%	Less than 58%	Less than 58%
Actual	51%	45%	50%

Schedule of Long-term Debt

Long-term debt, net as of December 31 was as follows (dollars in millions):



	2013									2012
	Alliant Energy			IPL			WPL			Alliant Energy			IPL			WPL
Senior Debentures:
3.3%, due 2015		$150.0			$150.0			$—			$150.0			$150.0			$—
5.875%, due 2018	100.0			100.0			—			100.0			100.0			—
7.25%, due 2018	250.0			250.0			—			250.0			250.0			—
3.65%, due 2020	200.0			200.0			—			200.0			200.0			—
5.5%, due 2025	50.0			50.0			—			50.0			50.0			—
6.45%, due 2033	100.0			100.0			—			100.0			100.0			—
6.3%, due 2034	125.0			125.0			—			125.0			125.0			—
6.25%, due 2039	300.0			300.0			—			300.0			300.0			—
4.7%, due 2043 (a)	250.0			250.0			—			—			—			—
	1,525.0			1,525.0			—			1,275.0			1,275.0			—
Debentures:
5%, due 2019	250.0			—			250.0			250.0			—			250.0
4.6%, due 2020	150.0			—			150.0			150.0			—			150.0
2.25%, due 2022	250.0			—			250.0			250.0			—			250.0
6.25%, due 2034	100.0			—			100.0			100.0			—			100.0
6.375%, due 2037	300.0			—			300.0			300.0			—			300.0
7.6%, due 2038	250.0			—			250.0			250.0			—			250.0
	1,300.0			—			1,300.0			1,300.0			—			1,300.0
Pollution Control Revenue Bonds:
5%, due 2014	38.4			38.4			—			38.4			38.4			—
5%, due 2014 and 2015	24.5			—			24.5			24.5			—			24.5
5.375%, due 2015	14.6			—			14.6			14.6			—			14.6
	77.5			38.4			39.1			77.5			38.4			39.1
Other:
Commercial paper, 0.4% at December 31, 2012 (b)	—			—			—			50.0			50.0			—
4% senior notes, due 2014	250.0			—			—			250.0			—			—
Term loan credit agreement through 2014, 1% at December 31, 2013	60.0			—			—			60.0			—			—
3.45% senior notes, due 2022	75.0			—			—			75.0			—			—
5.06% senior secured notes, due 2014 to 2024	60.5			—			—			61.9			—			—
Other, 1% at December 31, 2013, due 2014 to 2025	0.4			—			—			0.5			—			—
	445.9			—			—			497.4			50.0			—
Subtotal	3,348.4			1,563.4			1,339.1			3,149.9			1,363.4			1,339.1
Current maturities	(358.5		)	(38.4		)	(8.5		)	(1.5		)	—			—
Unamortized debt (discount) and premium, net	(12.1		)	(5.0		)	(7.0		)	(11.8		)	(3.9		)	(7.6		)
Long-term debt, net		$2,977.8			$1,520.0			$1,323.6			$3,136.6			$1,359.5			$1,331.5


(a)	In 2013, IPL issued $250.0 million of 4.7% senior debentures due 2043. The proceeds from the issuance were used by IPL to reduce cash proceeds received from its sales of accounts receivable program, reduce commercial paper classified as long-term debt by $65 million and for general working capital purposes.


(b)	At December 31, 2012, $50.0 million of commercial paper was recorded in “Long-term debt, net” on Alliant Energy’s and IPL’s Consolidated Balance Sheets due to the existence of long-term credit facilities that back-stop this commercial paper balance, along with Alliant Energy’s and IPL’s intent and ability to refinance these balances on a long-term basis.

Schedule of Debt Maturities

At December 31, 2013, debt maturities for 2014 to 2018 were as follows (in millions):



	2014		2015		2016		2017		2018
IPL		$38		$150		$—		$—		$350
WPL	9		31		—		—		—
Resources	62		2		3		4		5
Alliant Energy parent company	250		—		—		—		—
Alliant Energy		$359		$183		$3		$4		$355

Unamortized Debt Issuance Costs

Unamortized debt issuance costs recorded in “Deferred charges and other” on the Consolidated Balance Sheets at December 31 were as follows (in millions):



	Alliant Energy		IPL		WPL
	2013	2012	2013	2012	2013	2012
Unamortized debt issuance costs	$19.9	$19.5	$9.7	$8.0	$9.0	$9.8

- Definition

Tabular disclosure of the capital amounts and ratios as of the balance sheet date, indicating whether the entity or entities are in compliance with regulatory capital requirements, by entity.

+ References+ Details

- Definition

Tabular disclosure of long-debt instruments or arrangements, including identification, terms, features, collateral requirements and other information necessary to a fair presentation. These are debt arrangements that originally required repayment more than twelve months after issuance or greater than the normal operating cycle of the entity, if longer.

+ References

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+ Details