Revenues

9 Months Ended

Sep. 30, 2021

Disaggregation of Revenue [Line Items]

Revenues from Contracts with Customers

REVENUES

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 September 30	2021	2020	2021	2020	2021	2020
Electric Utility:
Retail - residential	$348	$328	$207	$189	$141	$139
Retail - commercial	232	210	160	142	72	68
Retail - industrial	265	241	158	149	107	92
Wholesale	55	47	18	17	37	30
Bulk power and other	39	26	12	22	27	4
Total Electric Utility	939	852	555	519	384	333
Gas Utility:
Retail - residential	24	22	14	12	10	10
Retail - commercial	13	10	8	6	5	4
Retail - industrial	3	2	3	1	—	1
Transportation/other	10	8	6	5	4	3
Total Gas Utility	50	42	31	24	19	18
Other Utility:
Steam	9	8	9	8	—	—
Other utility	4	2	4	2	—	—
Total Other Utility	13	10	13	10	—	—
Non-Utility and Other:
Travero and other	22	16	—	—	—	—
Total Non-Utility and Other	22	16	—	—	—	—
Total revenues	$1,024	$920	$599	$553	$403	$351

	Alliant Energy		IPL		WPL
Nine Months Ended September 30	2021	2020	2021	2020	2021	2020
Electric Utility:
Retail - residential	$868	$845	$488	$472	$380	$373
Retail - commercial	579	556	385	371	194	185
Retail - industrial	677	648	386	384	291	264
Wholesale	142	127	44	44	98	83
Bulk power and other	91	81	40	61	51	20
Total Electric Utility	2,357	2,257	1,343	1,332	1,014	925
Gas Utility:
Retail - residential	162	146	90	79	72	67
Retail - commercial	85	70	47	38	38	32
Retail - industrial	11	8	8	5	3	3
Transportation/other	31	29	20	19	11	10
Total Gas Utility	289	253	165	141	124	112
Other Utility:
Steam	27	27	27	27	—	—
Other utility	9	5	8	4	1	1
Total Other Utility	36	32	35	31	1	1
Non-Utility and Other:
Travero and other	60	57	—	—	—	—
Total Non-Utility and Other	60	57	—	—	—	—
Total revenues	$2,742	$2,599	$1,543	$1,504	$1,139	$1,038

IPL [Member]

Disaggregation of Revenue [Line Items]

Revenues from Contracts with Customers

REVENUES

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 September 30	2021	2020	2021	2020	2021	2020
Electric Utility:
Retail - residential	$348	$328	$207	$189	$141	$139
Retail - commercial	232	210	160	142	72	68
Retail - industrial	265	241	158	149	107	92
Wholesale	55	47	18	17	37	30
Bulk power and other	39	26	12	22	27	4
Total Electric Utility	939	852	555	519	384	333
Gas Utility:
Retail - residential	24	22	14	12	10	10
Retail - commercial	13	10	8	6	5	4
Retail - industrial	3	2	3	1	—	1
Transportation/other	10	8	6	5	4	3
Total Gas Utility	50	42	31	24	19	18
Other Utility:
Steam	9	8	9	8	—	—
Other utility	4	2	4	2	—	—
Total Other Utility	13	10	13	10	—	—
Non-Utility and Other:
Travero and other	22	16	—	—	—	—
Total Non-Utility and Other	22	16	—	—	—	—
Total revenues	$1,024	$920	$599	$553	$403	$351

	Alliant Energy		IPL		WPL
Nine Months Ended September 30	2021	2020	2021	2020	2021	2020
Electric Utility:
Retail - residential	$868	$845	$488	$472	$380	$373
Retail - commercial	579	556	385	371	194	185
Retail - industrial	677	648	386	384	291	264
Wholesale	142	127	44	44	98	83
Bulk power and other	91	81	40	61	51	20
Total Electric Utility	2,357	2,257	1,343	1,332	1,014	925
Gas Utility:
Retail - residential	162	146	90	79	72	67
Retail - commercial	85	70	47	38	38	32
Retail - industrial	11	8	8	5	3	3
Transportation/other	31	29	20	19	11	10
Total Gas Utility	289	253	165	141	124	112
Other Utility:
Steam	27	27	27	27	—	—
Other utility	9	5	8	4	1	1
Total Other Utility	36	32	35	31	1	1
Non-Utility and Other:
Travero and other	60	57	—	—	—	—
Total Non-Utility and Other	60	57	—	—	—	—
Total revenues	$2,742	$2,599	$1,543	$1,504	$1,139	$1,038

WPL [Member]

Disaggregation of Revenue [Line Items]

Revenues from Contracts with Customers

REVENUES

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 September 30	2021	2020	2021	2020	2021	2020
Electric Utility:
Retail - residential	$348	$328	$207	$189	$141	$139
Retail - commercial	232	210	160	142	72	68
Retail - industrial	265	241	158	149	107	92
Wholesale	55	47	18	17	37	30
Bulk power and other	39	26	12	22	27	4
Total Electric Utility	939	852	555	519	384	333
Gas Utility:
Retail - residential	24	22	14	12	10	10
Retail - commercial	13	10	8	6	5	4
Retail - industrial	3	2	3	1	—	1
Transportation/other	10	8	6	5	4	3
Total Gas Utility	50	42	31	24	19	18
Other Utility:
Steam	9	8	9	8	—	—
Other utility	4	2	4	2	—	—
Total Other Utility	13	10	13	10	—	—
Non-Utility and Other:
Travero and other	22	16	—	—	—	—
Total Non-Utility and Other	22	16	—	—	—	—
Total revenues	$1,024	$920	$599	$553	$403	$351

	Alliant Energy		IPL		WPL
Nine Months Ended September 30	2021	2020	2021	2020	2021	2020
Electric Utility:
Retail - residential	$868	$845	$488	$472	$380	$373
Retail - commercial	579	556	385	371	194	185
Retail - industrial	677	648	386	384	291	264
Wholesale	142	127	44	44	98	83
Bulk power and other	91	81	40	61	51	20
Total Electric Utility	2,357	2,257	1,343	1,332	1,014	925
Gas Utility:
Retail - residential	162	146	90	79	72	67
Retail - commercial	85	70	47	38	38	32
Retail - industrial	11	8	8	5	3	3
Transportation/other	31	29	20	19	11	10
Total Gas Utility	289	253	165	141	124	112
Other Utility:
Steam	27	27	27	27	—	—
Other utility	9	5	8	4	1	1
Total Other Utility	36	32	35	31	1	1
Non-Utility and Other:
Travero and other	60	57	—	—	—	—
Total Non-Utility and Other	60	57	—	—	—	—
Total revenues	$2,742	$2,599	$1,543	$1,504	$1,139	$1,038