Derivative Instruments (Tables)

9 Months Ended

Sep. 30, 2022

Derivative Instruments [Line Items]

Notional Amounts Of Derivative Instruments

As of September 30, 2022, gross notional amounts and settlement/delivery years related to outstanding swap contracts, option contracts, physical forward contracts and FTRs that were accounted for as commodity derivative instruments were as follows (units in thousands):

	Electricity		FTRs		Natural Gas		Coal		Diesel Fuel
	MWhs	Years	MWhs	Years	Dths	Years	Tons	Years	Gallons	Years
Alliant Energy	1,379	2022-2024	14,454	2022-2023	249,508	2022-2032	1,566	2022-2023	756	2022
IPL	768	2022-2024	6,165	2022-2023	135,193	2022-2030	669	2022-2023	—	—
WPL	611	2022-2023	8,289	2022-2023	114,315	2022-2032	897	2022-2023	756	2022

Fair Value Of Financial Instruments

Derivative instruments are recorded at fair value each reporting date on the balance sheets as assets or liabilities as follows (in millions):

	Alliant Energy		IPL		WPL
	September 30, 2022	December 31, 2021	September 30, 2022	December 31, 2021	September 30, 2022	December 31, 2021
Current derivative assets	$200	$113	$117	$48	$83	$65
Non-current derivative assets	160	63	85	36	75	27
Current derivative liabilities	71	8	54	4	17	4
Non-current derivative liabilities	27	1	12	—	15	1

Balance Sheet Offsetting

However, if the fair value amounts of derivative instruments by counterparty were netted, derivative assets and derivative liabilities related to commodity contracts would have been presented on the balance sheets as follows (in millions):

	Alliant Energy		IPL		WPL
	Gross		Gross		Gross
	(as reported)	Net	(as reported)	Net	(as reported)	Net
September 30, 2022
Derivative assets	$360	$308	$202	$165	$158	$143
Derivative liabilities	98	46	66	29	32	17
December 31, 2021
Derivative assets	176	171	84	83	92	88
Derivative liabilities	9	4	4	3	5	1

IPL [Member]

Derivative Instruments [Line Items]

Notional Amounts Of Derivative Instruments

As of September 30, 2022, gross notional amounts and settlement/delivery years related to outstanding swap contracts, option contracts, physical forward contracts and FTRs that were accounted for as commodity derivative instruments were as follows (units in thousands):

	Electricity		FTRs		Natural Gas		Coal		Diesel Fuel
	MWhs	Years	MWhs	Years	Dths	Years	Tons	Years	Gallons	Years
Alliant Energy	1,379	2022-2024	14,454	2022-2023	249,508	2022-2032	1,566	2022-2023	756	2022
IPL	768	2022-2024	6,165	2022-2023	135,193	2022-2030	669	2022-2023	—	—
WPL	611	2022-2023	8,289	2022-2023	114,315	2022-2032	897	2022-2023	756	2022

Fair Value Of Financial Instruments

Derivative instruments are recorded at fair value each reporting date on the balance sheets as assets or liabilities as follows (in millions):

	Alliant Energy		IPL		WPL
	September 30, 2022	December 31, 2021	September 30, 2022	December 31, 2021	September 30, 2022	December 31, 2021
Current derivative assets	$200	$113	$117	$48	$83	$65
Non-current derivative assets	160	63	85	36	75	27
Current derivative liabilities	71	8	54	4	17	4
Non-current derivative liabilities	27	1	12	—	15	1

Balance Sheet Offsetting

However, if the fair value amounts of derivative instruments by counterparty were netted, derivative assets and derivative liabilities related to commodity contracts would have been presented on the balance sheets as follows (in millions):

	Alliant Energy		IPL		WPL
	Gross		Gross		Gross
	(as reported)	Net	(as reported)	Net	(as reported)	Net
September 30, 2022
Derivative assets	$360	$308	$202	$165	$158	$143
Derivative liabilities	98	46	66	29	32	17
December 31, 2021
Derivative assets	176	171	84	83	92	88
Derivative liabilities	9	4	4	3	5	1

WPL [Member]

Derivative Instruments [Line Items]

Notional Amounts Of Derivative Instruments

As of September 30, 2022, gross notional amounts and settlement/delivery years related to outstanding swap contracts, option contracts, physical forward contracts and FTRs that were accounted for as commodity derivative instruments were as follows (units in thousands):

	Electricity		FTRs		Natural Gas		Coal		Diesel Fuel
	MWhs	Years	MWhs	Years	Dths	Years	Tons	Years	Gallons	Years
Alliant Energy	1,379	2022-2024	14,454	2022-2023	249,508	2022-2032	1,566	2022-2023	756	2022
IPL	768	2022-2024	6,165	2022-2023	135,193	2022-2030	669	2022-2023	—	—
WPL	611	2022-2023	8,289	2022-2023	114,315	2022-2032	897	2022-2023	756	2022

Fair Value Of Financial Instruments

Derivative instruments are recorded at fair value each reporting date on the balance sheets as assets or liabilities as follows (in millions):

	Alliant Energy		IPL		WPL
	September 30, 2022	December 31, 2021	September 30, 2022	December 31, 2021	September 30, 2022	December 31, 2021
Current derivative assets	$200	$113	$117	$48	$83	$65
Non-current derivative assets	160	63	85	36	75	27
Current derivative liabilities	71	8	54	4	17	4
Non-current derivative liabilities	27	1	12	—	15	1

Balance Sheet Offsetting

However, if the fair value amounts of derivative instruments by counterparty were netted, derivative assets and derivative liabilities related to commodity contracts would have been presented on the balance sheets as follows (in millions):

	Alliant Energy		IPL		WPL
	Gross		Gross		Gross
	(as reported)	Net	(as reported)	Net	(as reported)	Net
September 30, 2022
Derivative assets	$360	$308	$202	$165	$158	$143
Derivative liabilities	98	46	66	29	32	17
December 31, 2021
Derivative assets	176	171	84	83	92	88
Derivative liabilities	9	4	4	3	5	1