Revenues (Tables)

3 Months Ended

Mar. 31, 2023

Disaggregation of Revenue [Line Items]

Disaggregation of Revenue

Disaggregation of revenues from contracts with customers, which correlates to revenues for each reportable segment, was as follows (in millions):

	Alliant Energy		IPL		WPL
Three Months Ended March 31	2023	2022	2023	2022	2023	2022
Electric Utility:
Retail - residential	$285	$293	$143	$150	$142	$143
Retail - commercial	185	188	112	118	73	70
Retail - industrial	216	211	107	111	109	100
Wholesale	46	47	12	15	34	32
Bulk power and other	36	34	14	6	22	28
Total Electric Utility	768	773	388	400	380	373
Gas Utility:
Retail - residential	167	158	93	85	74	73
Retail - commercial	88	82	44	40	44	42
Retail - industrial	7	8	4	5	3	3
Transportation/other	14	14	9	9	5	5
Total Gas Utility	276	262	150	139	126	123
Other Utility:
Steam	10	9	10	9	—	—
Other utility	1	2	1	2	—	—
Total Other Utility	11	11	11	11	—	—
Non-Utility and Other:
Travero and other	22	22	—	—	—	—
Total Non-Utility and Other	22	22	—	—	—	—
Total revenues	$1,077	$1,068	$549	$550	$506	$496

IPL [Member]

Disaggregation of Revenue [Line Items]

Disaggregation of Revenue

Disaggregation of revenues from contracts with customers, which correlates to revenues for each reportable segment, was as follows (in millions):

	Alliant Energy		IPL		WPL
Three Months Ended March 31	2023	2022	2023	2022	2023	2022
Electric Utility:
Retail - residential	$285	$293	$143	$150	$142	$143
Retail - commercial	185	188	112	118	73	70
Retail - industrial	216	211	107	111	109	100
Wholesale	46	47	12	15	34	32
Bulk power and other	36	34	14	6	22	28
Total Electric Utility	768	773	388	400	380	373
Gas Utility:
Retail - residential	167	158	93	85	74	73
Retail - commercial	88	82	44	40	44	42
Retail - industrial	7	8	4	5	3	3
Transportation/other	14	14	9	9	5	5
Total Gas Utility	276	262	150	139	126	123
Other Utility:
Steam	10	9	10	9	—	—
Other utility	1	2	1	2	—	—
Total Other Utility	11	11	11	11	—	—
Non-Utility and Other:
Travero and other	22	22	—	—	—	—
Total Non-Utility and Other	22	22	—	—	—	—
Total revenues	$1,077	$1,068	$549	$550	$506	$496

WPL [Member]

Disaggregation of Revenue [Line Items]

Disaggregation of Revenue

Disaggregation of revenues from contracts with customers, which correlates to revenues for each reportable segment, was as follows (in millions):

	Alliant Energy		IPL		WPL
Three Months Ended March 31	2023	2022	2023	2022	2023	2022
Electric Utility:
Retail - residential	$285	$293	$143	$150	$142	$143
Retail - commercial	185	188	112	118	73	70
Retail - industrial	216	211	107	111	109	100
Wholesale	46	47	12	15	34	32
Bulk power and other	36	34	14	6	22	28
Total Electric Utility	768	773	388	400	380	373
Gas Utility:
Retail - residential	167	158	93	85	74	73
Retail - commercial	88	82	44	40	44	42
Retail - industrial	7	8	4	5	3	3
Transportation/other	14	14	9	9	5	5
Total Gas Utility	276	262	150	139	126	123
Other Utility:
Steam	10	9	10	9	—	—
Other utility	1	2	1	2	—	—
Total Other Utility	11	11	11	11	—	—
Non-Utility and Other:
Travero and other	22	22	—	—	—	—
Total Non-Utility and Other	22	22	—	—	—	—
Total revenues	$1,077	$1,068	$549	$550	$506	$496