Debt

9 Months Ended

Sep. 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):

September 30, 2022	Alliant Energy	IPL	WPL
Amount outstanding	$383	$—	$—
Weighted average interest rates	3.4%	N/A	N/A
Available credit facility capacity	$617	$250	$300

	Alliant Energy		IPL		WPL
Three Months Ended September 30	2022	2021	2022	2021	2022	2021
Maximum amount outstanding (based on daily outstanding balances)	$449	$648	$—	$8	$251	$320
Average amount outstanding (based on daily outstanding balances)	$353	$560	$—	$—	$110	$221
Weighted average interest rates	2.4%	0.2%	—%	0.2%	2.0%	0.1%
Nine Months Ended September 30
Maximum amount outstanding (based on daily outstanding balances)	$577	$648	$—	$19	$252	$320
Average amount outstanding (based on daily outstanding balances)	$377	$479	$—	$—	$160	$196
Weighted average interest rates	1.2%	0.2%	—%	0.2%	0.9%	0.1%

In October 2022, Alliant Energy, IPL and WPL reallocated credit facility capacity amounts to $500 million for Alliant Energy at the parent company level, $200 million for IPL and $300 million for WPL, within the $1 billion total commitment.

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 (3% as of September 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.

In August 2022, WPL issued $600 million of 3.95% debentures due 2032. The debentures were issued as green bonds, and an amount equal to or in excess of the net proceeds will be disbursed for the development and acquisition of WPL’s solar EGUs.

In September 2022, Corporate Services retired its $75 million, 3.45% senior notes due 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):

September 30, 2022	Alliant Energy	IPL	WPL
Amount outstanding	$383	$—	$—
Weighted average interest rates	3.4%	N/A	N/A
Available credit facility capacity	$617	$250	$300

	Alliant Energy		IPL		WPL
Three Months Ended September 30	2022	2021	2022	2021	2022	2021
Maximum amount outstanding (based on daily outstanding balances)	$449	$648	$—	$8	$251	$320
Average amount outstanding (based on daily outstanding balances)	$353	$560	$—	$—	$110	$221
Weighted average interest rates	2.4%	0.2%	—%	0.2%	2.0%	0.1%
Nine Months Ended September 30
Maximum amount outstanding (based on daily outstanding balances)	$577	$648	$—	$19	$252	$320
Average amount outstanding (based on daily outstanding balances)	$377	$479	$—	$—	$160	$196
Weighted average interest rates	1.2%	0.2%	—%	0.2%	0.9%	0.1%

In October 2022, Alliant Energy, IPL and WPL reallocated credit facility capacity amounts to $500 million for Alliant Energy at the parent company level, $200 million for IPL and $300 million for WPL, within the $1 billion total commitment.

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):

September 30, 2022	Alliant Energy	IPL	WPL
Amount outstanding	$383	$—	$—
Weighted average interest rates	3.4%	N/A	N/A
Available credit facility capacity	$617	$250	$300

	Alliant Energy		IPL		WPL
Three Months Ended September 30	2022	2021	2022	2021	2022	2021
Maximum amount outstanding (based on daily outstanding balances)	$449	$648	$—	$8	$251	$320
Average amount outstanding (based on daily outstanding balances)	$353	$560	$—	$—	$110	$221
Weighted average interest rates	2.4%	0.2%	—%	0.2%	2.0%	0.1%
Nine Months Ended September 30
Maximum amount outstanding (based on daily outstanding balances)	$577	$648	$—	$19	$252	$320
Average amount outstanding (based on daily outstanding balances)	$377	$479	$—	$—	$160	$196
Weighted average interest rates	1.2%	0.2%	—%	0.2%	0.9%	0.1%

In October 2022, Alliant Energy, IPL and WPL reallocated credit facility capacity amounts to $500 million for Alliant Energy at the parent company level, $200 million for IPL and $300 million for WPL, within the $1 billion total commitment.

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 (3% as of September 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.

In August 2022, WPL issued $600 million of 3.95% debentures due 2032. The debentures were issued as green bonds, and an amount equal to or in excess of the net proceeds will be disbursed for the development and acquisition of WPL’s solar EGUs.

In September 2022, Corporate Services retired its $75 million, 3.45% senior notes due 2022.