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ACCOUNTS RECEIVABLE AND OTHER (Details) (CAD) In Millions, unless otherwise specified | Dec. 31, 2012 | Dec. 31, 2011
--- | --- | ---
ACCOUNTS RECEIVABLE AND OTHER |  |
Unbilled revenues | 2,289 | 2,210
Trade receivables | 677 | 802
Taxes receivable | 123 | 157
Regulatory assets |  | 42
Short-term portion of derivative assets | 383 | 486
Prepaid expenses and deposits | 132 | 54
Current deferred income taxes | 167 | 135
Dividends receivable | 26 | 30
Other | 266 | 171
Allowance for doubtful accounts | (49) | (58)
Accounts receivable and other | 4,014 | 4,029

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