Revenues (Tables)

6 Months Ended

Jun. 30, 2021

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 June 30	2021	2020	2021	2020	2021	2020
Electric Utility:
Retail - residential	$258	$251	$142	$136	$116	$115
Retail - commercial	175	163	115	109	60	54
Retail - industrial	210	197	116	114	94	83
Wholesale	47	40	15	13	32	27
Bulk power and other	27	24	14	16	13	8
Total Electric Utility	717	675	402	388	315	287
Gas Utility:
Retail - residential	39	33	24	18	15	15
Retail - commercial	19	15	12	8	7	7
Retail - industrial	3	2	2	2	1	—
Transportation/other	8	9	5	6	3	3
Total Gas Utility	69	59	43	34	26	25
Other Utility:
Steam	9	9	9	9	—	—
Other utility	1	1	1	1	—	—
Total Other Utility	10	10	10	10	—	—
Non-Utility and Other:
Transportation and other	21	19	—	—	—	—
Total Non-Utility and Other	21	19	—	—	—	—
Total revenues	$817	$763	$455	$432	$341	$312

	Alliant Energy		IPL		WPL
Six Months Ended June 30	2021	2020	2021	2020	2021	2020
Electric Utility:
Retail - residential	$520	$517	$281	$283	$239	$234
Retail - commercial	347	346	225	229	122	117
Retail - industrial	412	407	228	235	184	172
Wholesale	87	80	26	27	61	53
Bulk power and other	52	55	28	39	24	16
Total Electric Utility	1,418	1,405	788	813	630	592
Gas Utility:
Retail - residential	138	124	76	67	62	57
Retail - commercial	72	60	39	32	33	28
Retail - industrial	8	6	5	4	3	2
Transportation/other	21	21	14	14	7	7
Total Gas Utility	239	211	134	117	105	94
Other Utility:
Steam	18	19	18	19	—	—
Other utility	5	3	4	2	1	1
Total Other Utility	23	22	22	21	1	1
Non-Utility and Other:
Transportation and other	38	41	—	—	—	—
Total Non-Utility and Other	38	41	—	—	—	—
Total revenues	$1,718	$1,679	$944	$951	$736	$687

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 June 30	2021	2020	2021	2020	2021	2020
Electric Utility:
Retail - residential	$258	$251	$142	$136	$116	$115
Retail - commercial	175	163	115	109	60	54
Retail - industrial	210	197	116	114	94	83
Wholesale	47	40	15	13	32	27
Bulk power and other	27	24	14	16	13	8
Total Electric Utility	717	675	402	388	315	287
Gas Utility:
Retail - residential	39	33	24	18	15	15
Retail - commercial	19	15	12	8	7	7
Retail - industrial	3	2	2	2	1	—
Transportation/other	8	9	5	6	3	3
Total Gas Utility	69	59	43	34	26	25
Other Utility:
Steam	9	9	9	9	—	—
Other utility	1	1	1	1	—	—
Total Other Utility	10	10	10	10	—	—
Non-Utility and Other:
Transportation and other	21	19	—	—	—	—
Total Non-Utility and Other	21	19	—	—	—	—
Total revenues	$817	$763	$455	$432	$341	$312

	Alliant Energy		IPL		WPL
Six Months Ended June 30	2021	2020	2021	2020	2021	2020
Electric Utility:
Retail - residential	$520	$517	$281	$283	$239	$234
Retail - commercial	347	346	225	229	122	117
Retail - industrial	412	407	228	235	184	172
Wholesale	87	80	26	27	61	53
Bulk power and other	52	55	28	39	24	16
Total Electric Utility	1,418	1,405	788	813	630	592
Gas Utility:
Retail - residential	138	124	76	67	62	57
Retail - commercial	72	60	39	32	33	28
Retail - industrial	8	6	5	4	3	2
Transportation/other	21	21	14	14	7	7
Total Gas Utility	239	211	134	117	105	94
Other Utility:
Steam	18	19	18	19	—	—
Other utility	5	3	4	2	1	1
Total Other Utility	23	22	22	21	1	1
Non-Utility and Other:
Transportation and other	38	41	—	—	—	—
Total Non-Utility and Other	38	41	—	—	—	—
Total revenues	$1,718	$1,679	$944	$951	$736	$687

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 June 30	2021	2020	2021	2020	2021	2020
Electric Utility:
Retail - residential	$258	$251	$142	$136	$116	$115
Retail - commercial	175	163	115	109	60	54
Retail - industrial	210	197	116	114	94	83
Wholesale	47	40	15	13	32	27
Bulk power and other	27	24	14	16	13	8
Total Electric Utility	717	675	402	388	315	287
Gas Utility:
Retail - residential	39	33	24	18	15	15
Retail - commercial	19	15	12	8	7	7
Retail - industrial	3	2	2	2	1	—
Transportation/other	8	9	5	6	3	3
Total Gas Utility	69	59	43	34	26	25
Other Utility:
Steam	9	9	9	9	—	—
Other utility	1	1	1	1	—	—
Total Other Utility	10	10	10	10	—	—
Non-Utility and Other:
Transportation and other	21	19	—	—	—	—
Total Non-Utility and Other	21	19	—	—	—	—
Total revenues	$817	$763	$455	$432	$341	$312

	Alliant Energy		IPL		WPL
Six Months Ended June 30	2021	2020	2021	2020	2021	2020
Electric Utility:
Retail - residential	$520	$517	$281	$283	$239	$234
Retail - commercial	347	346	225	229	122	117
Retail - industrial	412	407	228	235	184	172
Wholesale	87	80	26	27	61	53
Bulk power and other	52	55	28	39	24	16
Total Electric Utility	1,418	1,405	788	813	630	592
Gas Utility:
Retail - residential	138	124	76	67	62	57
Retail - commercial	72	60	39	32	33	28
Retail - industrial	8	6	5	4	3	2
Transportation/other	21	21	14	14	7	7
Total Gas Utility	239	211	134	117	105	94
Other Utility:
Steam	18	19	18	19	—	—
Other utility	5	3	4	2	1	1
Total Other Utility	23	22	22	21	1	1
Non-Utility and Other:
Transportation and other	38	41	—	—	—	—
Total Non-Utility and Other	38	41	—	—	—	—
Total revenues	$1,718	$1,679	$944	$951	$736	$687