Debt

6 Months Ended

Jun. 30, 2022

Debt [Line Items]

Debt

DEBT

NOTE 7(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):

June 30, 2022	Alliant Energy	IPL	WPL
Amount outstanding	$399	$—	$222
Weighted average interest rates	1.8%	N/A	1.7%
Available credit facility capacity	$601	$250	$78

	Alliant Energy		IPL		WPL
Three Months Ended June 30	2022	2021	2022	2021	2022	2021
Maximum amount outstanding (based on daily outstanding balances)	$441	$571	$—	$19	$222	$232
Average amount outstanding (based on daily outstanding balances)	$337	$452	$—	$1	$166	$177
Weighted average interest rates	1.0%	0.2%	—%	0.2%	0.9%	0.1%
Six Months Ended June 30
Maximum amount outstanding (based on daily outstanding balances)	$577	$578	$—	$19	$252	$275
Average amount outstanding (based on daily outstanding balances)	$390	$438	$—	$—	$185	$183
Weighted average interest rates	0.6%	0.2%	—%	0.2%	0.5%	0.1%

NOTE 7(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 (2% as of June 30, 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 7(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):

June 30, 2022	Alliant Energy	IPL	WPL
Amount outstanding	$399	$—	$222
Weighted average interest rates	1.8%	N/A	1.7%
Available credit facility capacity	$601	$250	$78

	Alliant Energy		IPL		WPL
Three Months Ended June 30	2022	2021	2022	2021	2022	2021
Maximum amount outstanding (based on daily outstanding balances)	$441	$571	$—	$19	$222	$232
Average amount outstanding (based on daily outstanding balances)	$337	$452	$—	$1	$166	$177
Weighted average interest rates	1.0%	0.2%	—%	0.2%	0.9%	0.1%
Six Months Ended June 30
Maximum amount outstanding (based on daily outstanding balances)	$577	$578	$—	$19	$252	$275
Average amount outstanding (based on daily outstanding balances)	$390	$438	$—	$—	$185	$183
Weighted average interest rates	0.6%	0.2%	—%	0.2%	0.5%	0.1%

WPL [Member]

Debt [Line Items]

Debt

DEBT

NOTE 7(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):

June 30, 2022	Alliant Energy	IPL	WPL
Amount outstanding	$399	$—	$222
Weighted average interest rates	1.8%	N/A	1.7%
Available credit facility capacity	$601	$250	$78

	Alliant Energy		IPL		WPL
Three Months Ended June 30	2022	2021	2022	2021	2022	2021
Maximum amount outstanding (based on daily outstanding balances)	$441	$571	$—	$19	$222	$232
Average amount outstanding (based on daily outstanding balances)	$337	$452	$—	$1	$166	$177
Weighted average interest rates	1.0%	0.2%	—%	0.2%	0.9%	0.1%
Six Months Ended June 30
Maximum amount outstanding (based on daily outstanding balances)	$577	$578	$—	$19	$252	$275
Average amount outstanding (based on daily outstanding balances)	$390	$438	$—	$—	$185	$183
Weighted average interest rates	0.6%	0.2%	—%	0.2%	0.5%	0.1%