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Receivables | 6 Months Ended
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Jun. 30, 2023
Receivables [Line Items] |
Receivables | RECEIVABLES NOTE 4(a) - Accounts Receivable - For the three and six months ended June 30, 2023, Alliant Energy’s, IPL’s and WPL’s gross write-offs for accounts receivable were as follows (in millions):
| Originated in 2022 |  | Originated in 2023
| Three Months |  | Six Months |  | Three Months |  | Six Months
Alliant Energy | $3 |  | $8 |  | $2 |  | $2
IPL | 2 |  | 5 |  | 1 |  | 1
WPL | 1 |  | 3 |  | 1 |  | 1
NOTE 4(b) - Sales of Accounts Receivable - IPL maintains a Receivables Purchase and Sale Agreement (Receivables Agreement) whereby it may sell its customer accounts receivables, unbilled revenues and certain other accounts receivables to a third party through wholly-owned and consolidated special purpose entities. In March 2023, IPL amended and extended through March 2024 the purchase commitment from the third party to which it sells its receivables. The transfers of receivables meet the criteria for sale accounting established by the transfer of financial assets accounting rules. As of June 30, 2023, IPL had $50 million of available capacity under its sales of accounts receivable program. IPL’s maximum and average outstanding cash proceeds (based on daily outstanding balances) related to the sales of accounts receivable program for the three and six months ended June 30 were as follows (in millions):
| Three Months |  | Six Months
| 2023 |  | 2022 |  | 2023 |  | 2022
Maximum outstanding aggregate cash proceeds | $110 |  | $66 |  | $110 |  | $66
Average outstanding aggregate cash proceeds | 101 |  | 18 |  | 79 |  | 11
The attributes of IPL’s receivables sold under the Receivables Agreement were as follows (in millions):
| June 30, 2023 |  | December 31, 2022
Customer accounts receivable | $148 |  | $145
Unbilled utility revenues | 100 |  | 132
Receivables sold to third party | 248 |  | 277
Less: cash proceeds | 60 |  | 80
Deferred proceeds | 188 |  | 197
Less: allowance for expected credit losses | 13 |  | 12
Fair value of deferred proceeds | $175 |  | $185
As of June 30, 2023, outstanding receivables past due under the Receivables Agreement were $20 million. Additional attributes of IPL’s receivables sold under the Receivables Agreement for the three and six months ended June 30 were as follows (in millions):
| Three Months |  | Six Months
| 2023 |  | 2022 |  | 2023 |  | 2022
Collections | $514 |  | $500 |  | $1,104 |  | $1,061
Write-offs, net of recoveries | 2 |  | 1 |  | 4 |  | 3
IPL [Member] |
Receivables [Line Items] |
Receivables | RECEIVABLES NOTE 4(a) - Accounts Receivable - For the three and six months ended June 30, 2023, Alliant Energy’s, IPL’s and WPL’s gross write-offs for accounts receivable were as follows (in millions):
| Originated in 2022 |  | Originated in 2023
| Three Months |  | Six Months |  | Three Months |  | Six Months
Alliant Energy | $3 |  | $8 |  | $2 |  | $2
IPL | 2 |  | 5 |  | 1 |  | 1
WPL | 1 |  | 3 |  | 1 |  | 1
NOTE 4(b) - Sales of Accounts Receivable - IPL maintains a Receivables Purchase and Sale Agreement (Receivables Agreement) whereby it may sell its customer accounts receivables, unbilled revenues and certain other accounts receivables to a third party through wholly-owned and consolidated special purpose entities. In March 2023, IPL amended and extended through March 2024 the purchase commitment from the third party to which it sells its receivables. The transfers of receivables meet the criteria for sale accounting established by the transfer of financial assets accounting rules. As of June 30, 2023, IPL had $50 million of available capacity under its sales of accounts receivable program. IPL’s maximum and average outstanding cash proceeds (based on daily outstanding balances) related to the sales of accounts receivable program for the three and six months ended June 30 were as follows (in millions):
| Three Months |  | Six Months
| 2023 |  | 2022 |  | 2023 |  | 2022
Maximum outstanding aggregate cash proceeds | $110 |  | $66 |  | $110 |  | $66
Average outstanding aggregate cash proceeds | 101 |  | 18 |  | 79 |  | 11
The attributes of IPL’s receivables sold under the Receivables Agreement were as follows (in millions):
| June 30, 2023 |  | December 31, 2022
Customer accounts receivable | $148 |  | $145
Unbilled utility revenues | 100 |  | 132
Receivables sold to third party | 248 |  | 277
Less: cash proceeds | 60 |  | 80
Deferred proceeds | 188 |  | 197
Less: allowance for expected credit losses | 13 |  | 12
Fair value of deferred proceeds | $175 |  | $185
As of June 30, 2023, outstanding receivables past due under the Receivables Agreement were $20 million. Additional attributes of IPL’s receivables sold under the Receivables Agreement for the three and six months ended June 30 were as follows (in millions):
| Three Months |  | Six Months
| 2023 |  | 2022 |  | 2023 |  | 2022
Collections | $514 |  | $500 |  | $1,104 |  | $1,061
Write-offs, net of recoveries | 2 |  | 1 |  | 4 |  | 3
WPL [Member] |
Receivables [Line Items] |
Receivables | RECEIVABLES NOTE 4(a) - Accounts Receivable - For the three and six months ended June 30, 2023, Alliant Energy’s, IPL’s and WPL’s gross write-offs for accounts receivable were as follows (in millions):
| Originated in 2022 |  | Originated in 2023
| Three Months |  | Six Months |  | Three Months |  | Six Months
Alliant Energy | $3 |  | $8 |  | $2 |  | $2
IPL | 2 |  | 5 |  | 1 |  | 1
WPL | 1 |  | 3 |  | 1 |  | 1

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