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Related Parties (Tables) | 6 Months Ended
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Jun. 30, 2023
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):
| IPL |  | WPL
| Three Months |  | Six Months |  | Three Months |  | Six Months
| 2023 |  | 2022 |  | 2023 |  | 2022 |  | 2023 |  | 2022 |  | 2023 |  | 2022
Corporate Services billings | $48 |  | $51 |  | $88 |  | $91 |  | $43 |  | $42 |  | $80 |  | $78
Sales credited | 1 |  | — |  | 8 |  | — |  | 10 |  | 13 |  | 22 |  | 31
Purchases billed | 94 |  | 129 |  | 187 |  | 223 |  | 2 |  | 39 |  | 17 |  | 61
Net Intercompany Payables | Net intercompany payables to Corporate Services were as follows (in millions):
| IPL |  | WPL
| June 30, 2023 |  | December 31, 2022 |  | June 30, 2023 |  | December 31, 2022
Net payables to Corporate Services | $116 |  | $103 |  | $73 |  | $56
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 Months |  | Six Months
| 2023 |  | 2022 |  | 2023 |  | 2022
ATC billings to WPL | $44 |  | $35 |  | $78 |  | $69
WPL billings to ATC | 5 |  | 5 |  | 11 |  | 8
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):
| IPL |  | WPL
| Three Months |  | Six Months |  | Three Months |  | Six Months
| 2023 |  | 2022 |  | 2023 |  | 2022 |  | 2023 |  | 2022 |  | 2023 |  | 2022
Corporate Services billings | $48 |  | $51 |  | $88 |  | $91 |  | $43 |  | $42 |  | $80 |  | $78
Sales credited | 1 |  | — |  | 8 |  | — |  | 10 |  | 13 |  | 22 |  | 31
Purchases billed | 94 |  | 129 |  | 187 |  | 223 |  | 2 |  | 39 |  | 17 |  | 61
Net Intercompany Payables | Net intercompany payables to Corporate Services were as follows (in millions):
| IPL |  | WPL
| June 30, 2023 |  | December 31, 2022 |  | June 30, 2023 |  | December 31, 2022
Net payables to Corporate Services | $116 |  | $103 |  | $73 |  | $56
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):
| IPL |  | WPL
| Three Months |  | Six Months |  | Three Months |  | Six Months
| 2023 |  | 2022 |  | 2023 |  | 2022 |  | 2023 |  | 2022 |  | 2023 |  | 2022
Corporate Services billings | $48 |  | $51 |  | $88 |  | $91 |  | $43 |  | $42 |  | $80 |  | $78
Sales credited | 1 |  | — |  | 8 |  | — |  | 10 |  | 13 |  | 22 |  | 31
Purchases billed | 94 |  | 129 |  | 187 |  | 223 |  | 2 |  | 39 |  | 17 |  | 61
Net Intercompany Payables | Net intercompany payables to Corporate Services were as follows (in millions):
| IPL |  | WPL
| June 30, 2023 |  | December 31, 2022 |  | June 30, 2023 |  | December 31, 2022
Net payables to Corporate Services | $116 |  | $103 |  | $73 |  | $56
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 Months |  | Six Months
| 2023 |  | 2022 |  | 2023 |  | 2022
ATC billings to WPL | $44 |  | $35 |  | $78 |  | $69
WPL billings to ATC | 5 |  | 5 |  | 11 |  | 8

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