v3.25.2
Related Parties (Tables)
 6 Months Ended
Jun. 30, 2025
Related Party Transactions [Line Items]  
Services Provided, Sales Credited And Purchases The amounts billed for services provided, sales credited and purchases for the three and six months ended June 30 were as follows (in millions):
IPLWPL
Three MonthsSix Months Three MonthsSix Months
20252024202520242025202420252024
Corporate Services billings$50$49$97$92$48$46$95$86
Sales credited1—2—40146236
Purchases billed10710520020116163523
Net Intercompany Payables
Net intercompany payables to Corporate Services were as follows (in millions):
IPLWPL
June 30, 2025December 31, 2024June 30, 2025December 31, 2024
Net payables to Corporate Services$135$135$50$64
Related Amounts Billed Between Parties The related amounts billed between the parties for the three and six months ended June 30 were as follows (in millions):
Three MonthsSix Months
2025202420252024
ATC billings to WPL$38$39$76$76
WPL billings to ATC54117
IPL [Member]  
Related Party Transactions [Line Items]  
Services Provided, Sales Credited And Purchases The amounts billed for services provided, sales credited and purchases for the three and six months ended June 30 were as follows (in millions):
IPLWPL
Three MonthsSix Months Three MonthsSix Months
20252024202520242025202420252024
Corporate Services billings$50$49$97$92$48$46$95$86
Sales credited1—2—40146236
Purchases billed10710520020116163523
Net Intercompany Payables
Net intercompany payables to Corporate Services were as follows (in millions):
IPLWPL
June 30, 2025December 31, 2024June 30, 2025December 31, 2024
Net payables to Corporate Services$135$135$50$64
WPL [Member]  
Related Party Transactions [Line Items]  
Services Provided, Sales Credited And Purchases The amounts billed for services provided, sales credited and purchases for the three and six months ended June 30 were as follows (in millions):
IPLWPL
Three MonthsSix Months Three MonthsSix Months
20252024202520242025202420252024
Corporate Services billings$50$49$97$92$48$46$95$86
Sales credited1—2—40146236
Purchases billed10710520020116163523
Net Intercompany Payables
Net intercompany payables to Corporate Services were as follows (in millions):
IPLWPL
June 30, 2025December 31, 2024June 30, 2025December 31, 2024
Net payables to Corporate Services$135$135$50$64
Related Amounts Billed Between Parties The related amounts billed between the parties for the three and six months ended June 30 were as follows (in millions):
Three MonthsSix Months
2025202420252024
ATC billings to WPL$38$39$76$76
WPL billings to ATC54117