v3.25.2
Revenues (Tables)
 6 Months Ended
Jun. 30, 2025
Disaggregation of Revenue [Line Items]  
Disaggregation of Revenue
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 EnergyIPLWPL
Three Months Ended June 30202520242025202420252024
Electric Utility:
Retail - residential$295$291$142$151$153$140
Retail - commercial2111911351187673
Retail - industrial240237118118122119
Wholesale494314133530
Bulk power and other5627944723
Total Electric Utility851789418404433385
Gas Utility:
Retail - residential413821222016
Retail - commercial20191011108
Retail - industrial322111
Transportation/other12107654
Total Gas Utility766940403629
Other Utility:
Steam9999——
Other utility212——1
Total Other Utility1110119—1
Non-Utility and Other:
Travero and other2326————
Total Non-Utility and Other2326————
Total revenues$961$894$469$453$469$415
Alliant EnergyIPLWPL
Six Months Ended June 30202520242025202420252024
Electric Utility:
Retail - residential$618$588$297$301$321$287
Retail - commercial425377271232154145
Retail - industrial475460236229239231
Wholesale978928266963
Bulk power and other88661677259
Total Electric Utility1,7031,580848795855785
Gas Utility:
Retail - residential18816595909375
Retail - commercial948043415139
Retail - industrial864442
Transportation/other26221613109
Total Gas Utility316273158148158125
Other Utility:
Steam19201920——
Other utility645311
Total Other Utility2524242311
Non-Utility and Other:
Travero and other4448————
Total Non-Utility and Other4448————
Total revenues$2,088$1,925$1,030$966$1,014$911
IPL [Member]  
Disaggregation of Revenue [Line Items]  
Disaggregation of Revenue
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 EnergyIPLWPL
Three Months Ended June 30202520242025202420252024
Electric Utility:
Retail - residential$295$291$142$151$153$140
Retail - commercial2111911351187673
Retail - industrial240237118118122119
Wholesale494314133530
Bulk power and other5627944723
Total Electric Utility851789418404433385
Gas Utility:
Retail - residential413821222016
Retail - commercial20191011108
Retail - industrial322111
Transportation/other12107654
Total Gas Utility766940403629
Other Utility:
Steam9999——
Other utility212——1
Total Other Utility1110119—1
Non-Utility and Other:
Travero and other2326————
Total Non-Utility and Other2326————
Total revenues$961$894$469$453$469$415
Alliant EnergyIPLWPL
Six Months Ended June 30202520242025202420252024
Electric Utility:
Retail - residential$618$588$297$301$321$287
Retail - commercial425377271232154145
Retail - industrial475460236229239231
Wholesale978928266963
Bulk power and other88661677259
Total Electric Utility1,7031,580848795855785
Gas Utility:
Retail - residential18816595909375
Retail - commercial948043415139
Retail - industrial864442
Transportation/other26221613109
Total Gas Utility316273158148158125
Other Utility:
Steam19201920——
Other utility645311
Total Other Utility2524242311
Non-Utility and Other:
Travero and other4448————
Total Non-Utility and Other4448————
Total revenues$2,088$1,925$1,030$966$1,014$911
WPL [Member]  
Disaggregation of Revenue [Line Items]  
Disaggregation of Revenue
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 EnergyIPLWPL
Three Months Ended June 30202520242025202420252024
Electric Utility:
Retail - residential$295$291$142$151$153$140
Retail - commercial2111911351187673
Retail - industrial240237118118122119
Wholesale494314133530
Bulk power and other5627944723
Total Electric Utility851789418404433385
Gas Utility:
Retail - residential413821222016
Retail - commercial20191011108
Retail - industrial322111
Transportation/other12107654
Total Gas Utility766940403629
Other Utility:
Steam9999——
Other utility212——1
Total Other Utility1110119—1
Non-Utility and Other:
Travero and other2326————
Total Non-Utility and Other2326————
Total revenues$961$894$469$453$469$415
Alliant EnergyIPLWPL
Six Months Ended June 30202520242025202420252024
Electric Utility:
Retail - residential$618$588$297$301$321$287
Retail - commercial425377271232154145
Retail - industrial475460236229239231
Wholesale978928266963
Bulk power and other88661677259
Total Electric Utility1,7031,580848795855785
Gas Utility:
Retail - residential18816595909375
Retail - commercial948043415139
Retail - industrial864442
Transportation/other26221613109
Total Gas Utility316273158148158125
Other Utility:
Steam19201920——
Other utility645311
Total Other Utility2524242311
Non-Utility and Other:
Travero and other4448————
Total Non-Utility and Other4448————
Total revenues$2,088$1,925$1,030$966$1,014$911