Derivative Instruments (Tables)

3 Months Ended

Mar. 31, 2023

Derivative Instruments [Line Items]

Notional Amounts Of Derivative Instruments

As of March 31, 2023, 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
	MWhs	Years	MWhs	Years	Dths	Years	Tons	Years
Alliant Energy	922	2023-2025	3,276	2023	209,102	2023-2032	662	2023
IPL	391	2023-2025	1,338	2023	101,863	2023-2030	325	2023
WPL	531	2023	1,938	2023	107,239	2023-2032	337	2023

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
	March 31, 2023	December 31, 2022	March 31, 2023	December 31, 2022	March 31, 2023	December 31, 2022
Current derivative assets	$28	$111	$17	$69	$11	$42
Non-current derivative assets	94	126	52	69	42	57
Current derivative liabilities	65	59	26	40	39	19
Non-current derivative liabilities	30	20	8	6	22	14

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
March 31, 2023
Derivative assets	$122	$89	$69	$51	$53	$38
Derivative liabilities	95	62	34	16	61	46
December 31, 2022
Derivative assets	237	193	138	108	99	85
Derivative liabilities	79	35	46	16	33	19

IPL [Member]

Derivative Instruments [Line Items]

Notional Amounts Of Derivative Instruments

As of March 31, 2023, 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
	MWhs	Years	MWhs	Years	Dths	Years	Tons	Years
Alliant Energy	922	2023-2025	3,276	2023	209,102	2023-2032	662	2023
IPL	391	2023-2025	1,338	2023	101,863	2023-2030	325	2023
WPL	531	2023	1,938	2023	107,239	2023-2032	337	2023

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
	March 31, 2023	December 31, 2022	March 31, 2023	December 31, 2022	March 31, 2023	December 31, 2022
Current derivative assets	$28	$111	$17	$69	$11	$42
Non-current derivative assets	94	126	52	69	42	57
Current derivative liabilities	65	59	26	40	39	19
Non-current derivative liabilities	30	20	8	6	22	14

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
March 31, 2023
Derivative assets	$122	$89	$69	$51	$53	$38
Derivative liabilities	95	62	34	16	61	46
December 31, 2022
Derivative assets	237	193	138	108	99	85
Derivative liabilities	79	35	46	16	33	19

WPL [Member]

Derivative Instruments [Line Items]

Notional Amounts Of Derivative Instruments

As of March 31, 2023, 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
	MWhs	Years	MWhs	Years	Dths	Years	Tons	Years
Alliant Energy	922	2023-2025	3,276	2023	209,102	2023-2032	662	2023
IPL	391	2023-2025	1,338	2023	101,863	2023-2030	325	2023
WPL	531	2023	1,938	2023	107,239	2023-2032	337	2023

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
	March 31, 2023	December 31, 2022	March 31, 2023	December 31, 2022	March 31, 2023	December 31, 2022
Current derivative assets	$28	$111	$17	$69	$11	$42
Non-current derivative assets	94	126	52	69	42	57
Current derivative liabilities	65	59	26	40	39	19
Non-current derivative liabilities	30	20	8	6	22	14

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
March 31, 2023
Derivative assets	$122	$89	$69	$51	$53	$38
Derivative liabilities	95	62	34	16	61	46
December 31, 2022
Derivative assets	237	193	138	108	99	85
Derivative liabilities	79	35	46	16	33	19