Revenues

9 Months Ended

Sep. 30, 2025

Disaggregation of Revenue [Line Items]

REVENUES

Disaggregation of revenues from contracts with customers is provided for each reportable segment (IPL and WPL), as well as by customer class within electric and gas sales, as follows (in millions):


	Alliant Energy		IPL		WPL
Three Months Ended September 30	2025	2024	2025	2024	2025	2024
Electric Utility:
Retail - residential	$408	$378	$215	$202	$193	$176
Retail - commercial	282	239	192	153	90	86
Retail - industrial	306	270	167	142	139	128
Wholesale	51	58	11	19	40	39
Bulk power and other	77	54	23	7	54	47
Total Electric Utility	1,124	999	608	523	516	476
Gas Utility:
Retail - residential	24	24	12	13	12	11
Retail - commercial	13	13	7	7	6	6
Retail - industrial	1	1	1	1	—	—
Transportation/other	13	11	7	6	6	5
Total Gas Utility	51	49	27	27	24	22
Other Utility:
Steam	9	9	9	9	—	—
Other utility	3	3	3	2	—	1
Total Other Utility	12	12	12	11	—	1
Non-Utility and Other:
Travero and other	23	21	—	—	—	—

Total Non-Utility and Other	23	21	—	—	—	—
Total revenues	$1,210	$1,081	$647	$561	$540	$499



	Alliant Energy		IPL		WPL
Nine Months Ended September 30	2025	2024	2025	2024	2025	2024
Electric Utility:
Retail - residential	$1,027	$966	$512	$502	$515	$464
Retail - commercial	705	616	462	385	243	231
Retail - industrial	782	730	403	372	379	358
Wholesale	148	147	39	45	109	102
Bulk power and other	166	120	39	14	127	106
Total Electric Utility	2,828	2,579	1,455	1,318	1,373	1,261
Gas Utility:
Retail - residential	211	189	107	103	104	86
Retail - commercial	106	92	49	48	57	44
Retail - industrial	10	8	6	5	4	3
Transportation/other	39	33	23	19	16	14
Total Gas Utility	366	322	185	175	181	147
Other Utility:
Steam	28	29	28	29	—	—
Other utility	9	7	8	5	1	2
Total Other Utility	37	36	36	34	1	2
Non-Utility and Other:
Travero and other	67	68	—	—	—	—

Total Non-Utility and Other	67	68	—	—	—	—
Total revenues	$3,298	$3,005	$1,676	$1,527	$1,555	$1,410

IPL [Member]

Disaggregation of Revenue [Line Items]

Revenues from Contracts with Customers

REVENUES

Disaggregation of revenues from contracts with customers is provided for each reportable segment (IPL and WPL), as well as by customer class within electric and gas sales, as follows (in millions):


	Alliant Energy		IPL		WPL
Three Months Ended September 30	2025	2024	2025	2024	2025	2024
Electric Utility:
Retail - residential	$408	$378	$215	$202	$193	$176
Retail - commercial	282	239	192	153	90	86
Retail - industrial	306	270	167	142	139	128
Wholesale	51	58	11	19	40	39
Bulk power and other	77	54	23	7	54	47
Total Electric Utility	1,124	999	608	523	516	476
Gas Utility:
Retail - residential	24	24	12	13	12	11
Retail - commercial	13	13	7	7	6	6
Retail - industrial	1	1	1	1	—	—
Transportation/other	13	11	7	6	6	5
Total Gas Utility	51	49	27	27	24	22
Other Utility:
Steam	9	9	9	9	—	—
Other utility	3	3	3	2	—	1
Total Other Utility	12	12	12	11	—	1
Non-Utility and Other:
Travero and other	23	21	—	—	—	—

Total Non-Utility and Other	23	21	—	—	—	—
Total revenues	$1,210	$1,081	$647	$561	$540	$499



	Alliant Energy		IPL		WPL
Nine Months Ended September 30	2025	2024	2025	2024	2025	2024
Electric Utility:
Retail - residential	$1,027	$966	$512	$502	$515	$464
Retail - commercial	705	616	462	385	243	231
Retail - industrial	782	730	403	372	379	358
Wholesale	148	147	39	45	109	102
Bulk power and other	166	120	39	14	127	106
Total Electric Utility	2,828	2,579	1,455	1,318	1,373	1,261
Gas Utility:
Retail - residential	211	189	107	103	104	86
Retail - commercial	106	92	49	48	57	44
Retail - industrial	10	8	6	5	4	3
Transportation/other	39	33	23	19	16	14
Total Gas Utility	366	322	185	175	181	147
Other Utility:
Steam	28	29	28	29	—	—
Other utility	9	7	8	5	1	2
Total Other Utility	37	36	36	34	1	2
Non-Utility and Other:
Travero and other	67	68	—	—	—	—

Total Non-Utility and Other	67	68	—	—	—	—
Total revenues	$3,298	$3,005	$1,676	$1,527	$1,555	$1,410

WPL [Member]

Disaggregation of Revenue [Line Items]

Revenues from Contracts with Customers

REVENUES

Disaggregation of revenues from contracts with customers is provided for each reportable segment (IPL and WPL), as well as by customer class within electric and gas sales, as follows (in millions):


	Alliant Energy		IPL		WPL
Three Months Ended September 30	2025	2024	2025	2024	2025	2024
Electric Utility:
Retail - residential	$408	$378	$215	$202	$193	$176
Retail - commercial	282	239	192	153	90	86
Retail - industrial	306	270	167	142	139	128
Wholesale	51	58	11	19	40	39
Bulk power and other	77	54	23	7	54	47
Total Electric Utility	1,124	999	608	523	516	476
Gas Utility:
Retail - residential	24	24	12	13	12	11
Retail - commercial	13	13	7	7	6	6
Retail - industrial	1	1	1	1	—	—
Transportation/other	13	11	7	6	6	5
Total Gas Utility	51	49	27	27	24	22
Other Utility:
Steam	9	9	9	9	—	—
Other utility	3	3	3	2	—	1
Total Other Utility	12	12	12	11	—	1
Non-Utility and Other:
Travero and other	23	21	—	—	—	—

Total Non-Utility and Other	23	21	—	—	—	—
Total revenues	$1,210	$1,081	$647	$561	$540	$499



	Alliant Energy		IPL		WPL
Nine Months Ended September 30	2025	2024	2025	2024	2025	2024
Electric Utility:
Retail - residential	$1,027	$966	$512	$502	$515	$464
Retail - commercial	705	616	462	385	243	231
Retail - industrial	782	730	403	372	379	358
Wholesale	148	147	39	45	109	102
Bulk power and other	166	120	39	14	127	106
Total Electric Utility	2,828	2,579	1,455	1,318	1,373	1,261
Gas Utility:
Retail - residential	211	189	107	103	104	86
Retail - commercial	106	92	49	48	57	44
Retail - industrial	10	8	6	5	4	3
Transportation/other	39	33	23	19	16	14
Total Gas Utility	366	322	185	175	181	147
Other Utility:
Steam	28	29	28	29	—	—
Other utility	9	7	8	5	1	2
Total Other Utility	37	36	36	34	1	2
Non-Utility and Other:
Travero and other	67	68	—	—	—	—

Total Non-Utility and Other	67	68	—	—	—	—
Total revenues	$3,298	$3,005	$1,676	$1,527	$1,555	$1,410

- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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+ Details

- Definition

The entire disclosure of revenue from contract with customer to transfer good or service and to transfer nonfinancial asset. Includes, but is not limited to, disaggregation of revenue, credit loss recognized from contract with customer, judgment and change in judgment related to contract with customer, and asset recognized from cost incurred to obtain or fulfill contract with customer. Excludes insurance and lease contracts.

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+ Details

ALLIANT ENERGY CORP 10-Q