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Accounts Receivable and Other Current Assets | 12 Months Ended
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Dec. 31, 2024
Receivables [Abstract] |
Accounts Receivable and Other Current Assets | ACCOUNTS RECEIVABLE AND OTHER CURRENT ASSETS
($ millions) | 2024 |  |  | 2023 |
Trade accounts receivable | 1,009 |  |  | 890 |
Unbilled accounts receivable | 738 |  |  | 727 |
Allowance for credit losses | (78) |  |  | (68) |
| 1,669 |  |  | 1,549 |
Income tax receivable | — |  |  | 78 |
Other (1) | 217 |  |  | 191 |
| 1,886 |  |  | 1,818 |
(1) Consists mainly of customer billings for non-core services, gas mitigation costs and collateral deposits for gas purchases, and the fair value of derivative instruments (Note 26) Allowance for Credit Losses The allowance for credit losses changed as follows.
($ millions) | 2024 |  |  | 2023 |
Balance, beginning of year | (68) |  |  | (58) |
Credit loss expensed | (30) |  |  | (33) |
Credit loss deferral | (31) |  |  | (13) |
Write-offs, net of recoveries | 55 |  |  | 35 |
Foreign exchange | (4) |  |  | 1 |
Balance, end of year | (78) |  |  | (68) |
See Note 26 for disclosure on the Corporation's credit risk.

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- Definition The entire disclosure for claims held for amounts due to 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/2009/role/commonPracticeRef -Topic 310 -SubTopic 10 -Name Accounting Standards Codification -Publisher FASB -URI https://asc.fasb.org/310-10/tableOfContent Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Topic 835 -SubTopic 30 -Name Accounting Standards Codification -Section 45 -Paragraph 2 -Publisher FASB -URI https://asc.fasb.org/1943274/2147482925/835-30-45-2 + Details
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