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Receivables | 3 Months Ended
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Mar. 31, 2018
Receivables [Line Items] |
Receivables | RECEIVABLES 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 2018, IPL amended and extended through March 2021 the purchase commitment from the third party to which it sells its receivables. Effective April 2018, the limit on cash proceeds will fluctuate between $90 million and $110 million. The transfers of receivables meet the criteria for sale accounting established by the transfer of financial assets accounting rules. As of March 31, 2018, IPL had no available capacity under its sales of accounts receivable program. For the three months ended March 31, 2018 and 2017, IPL’s costs incurred related to the sales of accounts receivable program were not material. IPL’s maximum and average outstanding cash proceeds (based on daily outstanding balances) related to the sales of accounts receivable program for the three months ended March 31 were as follows (in millions):
| 2018 |  | 2017
Maximum outstanding aggregate cash proceeds |  | $116.0 |  |  |  | $79.0 |
Average outstanding aggregate cash proceeds | 61.1 |  |  | 38.4 |
The attributes of IPL’s receivables sold under the Receivables Agreement were as follows (in millions):
| March 31, 2018 |  | December 31, 2017
Customer accounts receivable |  | $156.1 |  |  |  | $133.8 |
Unbilled utility revenues | 93.2 |  |  | 112.7 |
Other receivables | 0.3 |  |  | 0.3 |
Receivables sold to third party | 249.6 |  |  | 246.8 |
Less: cash proceeds | 116.0 |  |  | 12.0 |
Deferred proceeds | 133.6 |  |  | 234.8 |
Less: allowance for doubtful accounts | 12.7 |  |  | 12.7 |
Fair value of deferred proceeds |  | $120.9 |  |  |  | $222.1 |
As of March 31, 2018, outstanding receivables past due under the Receivables Agreement were $50.7 million. Additional attributes of IPL’s receivables sold under the Receivables Agreement for the three months ended March 31 were as follows (in millions):
| 2018 |  | 2017
Collections |  | $517.0 |  |  |  | $501.2 |
Write-offs, net of recoveries | 6.1 |  |  | 4.6 |
IPL [Member] |
Receivables [Line Items] |
Receivables | RECEIVABLES 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 2018, IPL amended and extended through March 2021 the purchase commitment from the third party to which it sells its receivables. Effective April 2018, the limit on cash proceeds will fluctuate between $90 million and $110 million. The transfers of receivables meet the criteria for sale accounting established by the transfer of financial assets accounting rules. As of March 31, 2018, IPL had no available capacity under its sales of accounts receivable program. For the three months ended March 31, 2018 and 2017, IPL’s costs incurred related to the sales of accounts receivable program were not material. IPL’s maximum and average outstanding cash proceeds (based on daily outstanding balances) related to the sales of accounts receivable program for the three months ended March 31 were as follows (in millions):
| 2018 |  | 2017
Maximum outstanding aggregate cash proceeds |  | $116.0 |  |  |  | $79.0 |
Average outstanding aggregate cash proceeds | 61.1 |  |  | 38.4 |
The attributes of IPL’s receivables sold under the Receivables Agreement were as follows (in millions):
| March 31, 2018 |  | December 31, 2017
Customer accounts receivable |  | $156.1 |  |  |  | $133.8 |
Unbilled utility revenues | 93.2 |  |  | 112.7 |
Other receivables | 0.3 |  |  | 0.3 |
Receivables sold to third party | 249.6 |  |  | 246.8 |
Less: cash proceeds | 116.0 |  |  | 12.0 |
Deferred proceeds | 133.6 |  |  | 234.8 |
Less: allowance for doubtful accounts | 12.7 |  |  | 12.7 |
Fair value of deferred proceeds |  | $120.9 |  |  |  | $222.1 |
As of March 31, 2018, outstanding receivables past due under the Receivables Agreement were $50.7 million. Additional attributes of IPL’s receivables sold under the Receivables Agreement for the three months ended March 31 were as follows (in millions):
| 2018 |  | 2017
Collections |  | $517.0 |  |  |  | $501.2 |
Write-offs, net of recoveries | 6.1 |  |  | 4.6 |

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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=84173941&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(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 946 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.6-04(6)) -URI http://asc.fasb.org/extlink&oid=6488278&loc=d3e603758-122996 Reference 4: 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)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 5: 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=84173941&loc=d3e5162-111524 Reference 6: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-03(a)(5)) -URI http://asc.fasb.org/extlink&oid=6879938&loc=d3e572229-122910 Reference 7: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-03(7)) -URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878 Reference 8: 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=84173941&loc=d3e5074-111524 + Details
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