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Receivables | 3 Months Ended
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Mar. 31, 2016
Receivables [Line Items] |
Receivables | RECEIVABLES Sales of Accounts Receivable - IPL maintains a 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 2016, IPL extended through March 2018 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 March 31, 2016, IPL sold $220.5 million of receivables to the third party, received $62.0 million in cash proceeds and recorded deferred proceeds of $154.2 million. IPL’s maximum and average outstanding cash proceeds related to the sales of accounts receivable program for the three months ended March 31 were as follows (in millions):
| 2016 |  | 2015
Maximum outstanding aggregate cash proceeds (based on daily outstanding balances) |  | $75.0 |  |  |  | $118.0 |
Average outstanding aggregate cash proceeds (based on daily outstanding balances) | 39.1 |  |  | 68.0 |
For the three months ended March 31, 2016 and 2015, IPL’s costs incurred related to the sales of accounts receivable program were not material. The attributes of IPL’s receivables sold under the Receivables Agreement were as follows (in millions):
| March 31, 2016 |  | December 31, 2015
Customer accounts receivable |  | $142.7 |  |  |  | $109.7 |
Unbilled utility revenues | 77.5 |  |  | 71.3 |
Other receivables | 0.3 |  |  | 0.1 |
Receivables sold to third party | 220.5 |  |  | 181.1 |
Less: cash proceeds (a) | 62.0 |  |  | 5.0 |
Deferred proceeds | 158.5 |  |  | 176.1 |
Less: allowance for doubtful accounts | 4.3 |  |  | 4.1 |
Fair value of deferred proceeds |  | $154.2 |  |  |  | $172.0 |
(a) | Changes in cash proceeds are presented in “Sales of accounts receivable” in operating activities in Alliant Energy’s and IPL’s cash flows statements.
As of March 31, 2016, outstanding receivables past due under the Receivables Agreement were $47.5 million. Additional attributes of IPL’s receivables sold under the Receivables Agreement for the three months ended March 31 were as follows (in millions):
| 2016 |  | 2015
Collections reinvested in receivables |  | $440.2 |  |  |  | $505.9 |
Credit losses, net of recoveries | 0.4 |  |  | 1.0 |
IPL [Member] |
Receivables [Line Items] |
Receivables | RECEIVABLES Sales of Accounts Receivable - IPL maintains a 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 2016, IPL extended through March 2018 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 March 31, 2016, IPL sold $220.5 million of receivables to the third party, received $62.0 million in cash proceeds and recorded deferred proceeds of $154.2 million. IPL’s maximum and average outstanding cash proceeds related to the sales of accounts receivable program for the three months ended March 31 were as follows (in millions):
| 2016 |  | 2015
Maximum outstanding aggregate cash proceeds (based on daily outstanding balances) |  | $75.0 |  |  |  | $118.0 |
Average outstanding aggregate cash proceeds (based on daily outstanding balances) | 39.1 |  |  | 68.0 |
For the three months ended March 31, 2016 and 2015, IPL’s costs incurred related to the sales of accounts receivable program were not material. The attributes of IPL’s receivables sold under the Receivables Agreement were as follows (in millions):
| March 31, 2016 |  | December 31, 2015
Customer accounts receivable |  | $142.7 |  |  |  | $109.7 |
Unbilled utility revenues | 77.5 |  |  | 71.3 |
Other receivables | 0.3 |  |  | 0.1 |
Receivables sold to third party | 220.5 |  |  | 181.1 |
Less: cash proceeds (a) | 62.0 |  |  | 5.0 |
Deferred proceeds | 158.5 |  |  | 176.1 |
Less: allowance for doubtful accounts | 4.3 |  |  | 4.1 |
Fair value of deferred proceeds |  | $154.2 |  |  |  | $172.0 |
(a) | Changes in cash proceeds are presented in “Sales of accounts receivable” in operating activities in Alliant Energy’s and IPL’s cash flows statements.
As of March 31, 2016, outstanding receivables past due under the Receivables Agreement were $47.5 million. Additional attributes of IPL’s receivables sold under the Receivables Agreement for the three months ended March 31 were as follows (in millions):
| 2016 |  | 2015
Collections reinvested in receivables |  | $440.2 |  |  |  | $505.9 |
Credit losses, net of recoveries | 0.4 |  |  | 1.0 |

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- Definition The entire disclosure for claims held for amounts due a entity, excluding financing receivables. Examples include, but are not limited to, trade accounts receivables, notes receivables, loans receivables. Includes disclosure for allowance for credit losses. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 3 -URI http://asc.fasb.org/extlink&oid=35738203&loc=d3e5066-111524 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.3,4) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 11 -URI http://asc.fasb.org/extlink&oid=35738203&loc=d3e5162-111524 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 235 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.4-08.(k)) -URI http://asc.fasb.org/extlink&oid=26873400&loc=d3e23780-122690 Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 4 -URI http://asc.fasb.org/extlink&oid=35738203&loc=d3e5074-111524 Reference 6: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 3, 4 -Article 5 Reference 7: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 03 -Paragraph 7 -Article 9 Reference 8: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 08 -Paragraph k -Article 4 + Details
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