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DEFERRED AMOUNTS AND OTHER ASSETS (Details) (CAD) In Millions, unless otherwise specified | 12 Months Ended
--- | ---
Dec. 31, 2012 | Dec. 31, 2011 | Dec. 31, 2010
DEFERRED AMOUNTS AND OTHER ASSETS |  |  |
Regulatory assets | 1,284 | 1,000 |
Long-term portion of derivative assets | 408 | 562 |
Affiliate long-term note receivable | 182 | 194 |
Contractual receivables | 303 | 288 |
Deferred financing costs | 127 | 132 |
Other | 318 | 324 |
Deferred amounts and other assets | 2,622 | 2,500 |
Deferred amounts subject to amortization | 265 | 255 |
Accumulated amortization of deferred costs | 123 | 106 |
Amortization expense of deferred cost | 25 | 20 | 20

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