Receivables (Tables)

9 Months Ended

Sep. 30, 2023

Receivables [Line Items]

Gross Write-offs For Accounts Receivable

For the three and nine months ended September 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	Nine Months	Three Months	Nine Months
Alliant Energy	$3	$11	$6	$8
IPL	2	7	4	5
WPL	1	4	2	3

Maximum And Average Outstanding Cash Proceeds

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 nine months ended September 30 were as follows (in millions):

	Three Months		Nine Months
	2023	2022	2023	2022
Maximum outstanding aggregate cash proceeds	$94	$36	$110	$66
Average outstanding aggregate cash proceeds	46	3	68	8

Attributes of Receivables Sold Under the Receivables Agreement

The attributes of IPL’s receivables sold under the Receivables Agreement were as follows (in millions):

	September 30, 2023	December 31, 2022
Customer accounts receivable	$161	$145
Unbilled utility revenues	88	132
Other receivables	1	—
Receivables sold to third party	250	277
Less: cash proceeds	1	80
Deferred proceeds	249	197
Less: allowance for expected credit losses	13	12
Fair value of deferred proceeds	$236	$185

Additional Attributes Of Receivables Sold Under The Receivables Agreement

Additional attributes of IPL’s receivables sold under the Receivables Agreement for the three and nine months ended September 30 were as follows (in millions):

	Three Months		Nine Months
	2023	2022	2023	2022
Collections	$616	$670	$1,720	$1,731
Write-offs, net of recoveries	5	3	9	6

IPL [Member]

Receivables [Line Items]

Gross Write-offs For Accounts Receivable

For the three and nine months ended September 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	Nine Months	Three Months	Nine Months
Alliant Energy	$3	$11	$6	$8
IPL	2	7	4	5
WPL	1	4	2	3

Maximum And Average Outstanding Cash Proceeds

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 nine months ended September 30 were as follows (in millions):

	Three Months		Nine Months
	2023	2022	2023	2022
Maximum outstanding aggregate cash proceeds	$94	$36	$110	$66
Average outstanding aggregate cash proceeds	46	3	68	8

Attributes of Receivables Sold Under the Receivables Agreement

The attributes of IPL’s receivables sold under the Receivables Agreement were as follows (in millions):

	September 30, 2023	December 31, 2022
Customer accounts receivable	$161	$145
Unbilled utility revenues	88	132
Other receivables	1	—
Receivables sold to third party	250	277
Less: cash proceeds	1	80
Deferred proceeds	249	197
Less: allowance for expected credit losses	13	12
Fair value of deferred proceeds	$236	$185

Additional Attributes Of Receivables Sold Under The Receivables Agreement

Additional attributes of IPL’s receivables sold under the Receivables Agreement for the three and nine months ended September 30 were as follows (in millions):

	Three Months		Nine Months
	2023	2022	2023	2022
Collections	$616	$670	$1,720	$1,731
Write-offs, net of recoveries	5	3	9	6

WPL [Member]

Receivables [Line Items]

Gross Write-offs For Accounts Receivable

For the three and nine months ended September 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	Nine Months	Three Months	Nine Months
Alliant Energy	$3	$11	$6	$8
IPL	2	7	4	5
WPL	1	4	2	3