Debt

3 Months Ended

Mar. 31, 2022

Debt [Line Items]

Debt

DEBT

NOTE 6(a) Short-term Debt - Information regarding Alliant Energy’s, IPL’s and WPL’s commercial paper classified as short-term debt was as follows (dollars in millions):

March 31, 2022	Alliant Energy	IPL	WPL
Amount outstanding	$276	$—	$157
Weighted average interest rates	0.6%	N/A	0.5%
Available credit facility capacity	$724	$250	$143

	Alliant Energy		IPL		WPL
Three Months Ended March 31	2022	2021	2022	2021	2022	2021
Maximum amount outstanding (based on daily outstanding balances)	$577	$578	$—	$—	$252	$275
Average amount outstanding (based on daily outstanding balances)	$443	$424	$—	$—	$205	$189
Weighted average interest rates	0.3%	0.2%	—%	—%	0.3%	0.2%

NOTE 6(b) Long-term Debt - In February 2022, AEF issued $350 million of 3.6% senior notes due 2032. The net proceeds from the issuance were used to reduce Alliant Energy’s outstanding commercial paper and for general corporate purposes. In March 2022, AEF entered into a $300 million variable rate (1% as of March 31, 2022) term loan credit agreement (with Alliant Energy as guarantor), which expires in March 2024, and used the borrowings under this agreement to retire its $300 million variable rate term loan credit agreement that expired in March 2022.

IPL [Member]

Debt [Line Items]

Debt

DEBT

NOTE 6(a) Short-term Debt - Information regarding Alliant Energy’s, IPL’s and WPL’s commercial paper classified as short-term debt was as follows (dollars in millions):

March 31, 2022	Alliant Energy	IPL	WPL
Amount outstanding	$276	$—	$157
Weighted average interest rates	0.6%	N/A	0.5%
Available credit facility capacity	$724	$250	$143

	Alliant Energy		IPL		WPL
Three Months Ended March 31	2022	2021	2022	2021	2022	2021
Maximum amount outstanding (based on daily outstanding balances)	$577	$578	$—	$—	$252	$275
Average amount outstanding (based on daily outstanding balances)	$443	$424	$—	$—	$205	$189
Weighted average interest rates	0.3%	0.2%	—%	—%	0.3%	0.2%

WPL [Member]

Debt [Line Items]

Debt

DEBT

NOTE 6(a) Short-term Debt - Information regarding Alliant Energy’s, IPL’s and WPL’s commercial paper classified as short-term debt was as follows (dollars in millions):

March 31, 2022	Alliant Energy	IPL	WPL
Amount outstanding	$276	$—	$157
Weighted average interest rates	0.6%	N/A	0.5%
Available credit facility capacity	$724	$250	$143

	Alliant Energy		IPL		WPL
Three Months Ended March 31	2022	2021	2022	2021	2022	2021
Maximum amount outstanding (based on daily outstanding balances)	$577	$578	$—	$—	$252	$275
Average amount outstanding (based on daily outstanding balances)	$443	$424	$—	$—	$205	$189
Weighted average interest rates	0.3%	0.2%	—%	—%	0.3%	0.2%