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RETIREMENT AND POSTRETIREMENT BENEFITS (Details 4) (CAD) In Millions, unless otherwise specified | Dec. 31, 2012 | Dec. 31, 2011 | Dec. 31, 2010
--- | --- | --- | ---
Level 3 |  |  |
Pension and Other Postretirement Benefit Disclosures |  |  |
Financial instruments at fair value | 85 | 68 | 65
Pension |  |  |
Pension and Other Postretirement Benefit Disclosures |  |  |
Financial instruments at fair value | 1,500 | 1,355 | 1,314
Pension | Cash and cash equivalents | Level 1 |  |  |
Pension and Other Postretirement Benefit Disclosures |  |  |
Financial instruments at fair value | 44 | 14 |
Pension | Cash and cash equivalents | Total |  |  |
Pension and Other Postretirement Benefit Disclosures |  |  |
Financial instruments at fair value | 44 | 14 |
Pension | Canadian government bonds | Canadian | Level 1 |  |  |
Pension and Other Postretirement Benefit Disclosures |  |  |
Financial instruments at fair value | 87 | 115 |
Pension | Canadian government bonds | Canadian | Total |  |  |
Pension and Other Postretirement Benefit Disclosures |  |  |
Financial instruments at fair value | 87 | 115 |
Pension | Corporate bonds and debentures | Level 2 |  |  |
Pension and Other Postretirement Benefit Disclosures |  |  |
Financial instruments at fair value | 4 | 4 |
Pension | Corporate bonds and debentures | Total |  |  |
Pension and Other Postretirement Benefit Disclosures |  |  |
Financial instruments at fair value | 4 | 4 |
Pension | Canadian corporate bond index fund | Canadian | Level 1 |  |  |
Pension and Other Postretirement Benefit Disclosures |  |  |
Financial instruments at fair value | 196 | 158 |
Pension | Canadian corporate bond index fund | Canadian | Total |  |  |
Pension and Other Postretirement Benefit Disclosures |  |  |
Financial instruments at fair value | 196 | 158 |
Pension | Canadian government bond index fund | Canadian | Level 1 |  |  |
Pension and Other Postretirement Benefit Disclosures |  |  |
Financial instruments at fair value | 152 | 157 |
Pension | Canadian government bond index fund | Canadian | Total |  |  |
Pension and Other Postretirement Benefit Disclosures |  |  |
Financial instruments at fair value | 152 | 157 |
Pension | United States debt index fund | United States | Level 1 |  |  |
Pension and Other Postretirement Benefit Disclosures |  |  |
Financial instruments at fair value | 45 | 62 |
Pension | United States debt index fund | United States | Level 2 |  |  |
Pension and Other Postretirement Benefit Disclosures |  |  |
Financial instruments at fair value | 2 |  |
Pension | United States debt index fund | United States | Total |  |  |
Pension and Other Postretirement Benefit Disclosures |  |  |
Financial instruments at fair value | 47 | 62 |
Pension | Equity securities | Canadian | Level 1 |  |  |
Pension and Other Postretirement Benefit Disclosures |  |  |
Financial instruments at fair value | 190 | 148 |
Pension | Equity securities | Canadian | Total |  |  |
Pension and Other Postretirement Benefit Disclosures |  |  |
Financial instruments at fair value | 190 | 148 |
Pension | Equity securities | United States | Level 1 |  |  |
Pension and Other Postretirement Benefit Disclosures |  |  |
Financial instruments at fair value | 24 |  |
Pension | Equity securities | United States | Total |  |  |
Pension and Other Postretirement Benefit Disclosures |  |  |
Financial instruments at fair value | 24 |  |
Pension | Equity securities | Global | Level 1 |  |  |
Pension and Other Postretirement Benefit Disclosures |  |  |
Financial instruments at fair value | 9 |  |
Pension | Equity securities | Global | Total |  |  |
Pension and Other Postretirement Benefit Disclosures |  |  |
Financial instruments at fair value | 9 |  |
Pension | Equity funds | Canadian | Level 1 |  |  |
Pension and Other Postretirement Benefit Disclosures |  |  |
Financial instruments at fair value | 64 | 21 |
Pension | Equity funds | Canadian | Level 2 |  |  |
Pension and Other Postretirement Benefit Disclosures |  |  |
Financial instruments at fair value | 39 | 74 |
Pension | Equity funds | Canadian | Total |  |  |
Pension and Other Postretirement Benefit Disclosures |  |  |
Financial instruments at fair value | 103 | 95 |
Pension | Equity funds | United States | Level 1 |  |  |
Pension and Other Postretirement Benefit Disclosures |  |  |
Financial instruments at fair value | 60 | 170 |
Pension | Equity funds | United States | Level 2 |  |  |
Pension and Other Postretirement Benefit Disclosures |  |  |
Financial instruments at fair value | 26 | 89 |
Pension | Equity funds | United States | Total |  |  |
Pension and Other Postretirement Benefit Disclosures |  |  |
Financial instruments at fair value | 86 | 259 |
Pension | Equity funds | Global | Level 1 |  |  |
Pension and Other Postretirement Benefit Disclosures |  |  |
Financial instruments at fair value | 255 | 191 |
Pension | Equity funds | Global | Level 2 |  |  |
Pension and Other Postretirement Benefit Disclosures |  |  |
Financial instruments at fair value | 159 | 7 |
Pension | Equity funds | Global | Total |  |  |
Pension and Other Postretirement Benefit Disclosures |  |  |
Financial instruments at fair value | 414 | 198 |
Pension | Private equity investment | Level 3 |  |  |
Pension and Other Postretirement Benefit Disclosures |  |  |
Financial instruments at fair value | 61 | 68 |
Pension | Private equity investment | Total |  |  |
Pension and Other Postretirement Benefit Disclosures |  |  |
Financial instruments at fair value | 61 | 68 |
Pension | Real estate | Level 3 |  |  |
Pension and Other Postretirement Benefit Disclosures |  |  |
Financial instruments at fair value | 24 |  |
Pension | Real estate | Total |  |  |
Pension and Other Postretirement Benefit Disclosures |  |  |
Financial instruments at fair value | 24 |  |
OPEB |  |  |
Pension and Other Postretirement Benefit Disclosures |  |  |
Financial instruments at fair value | 62 | 54 | 41
OPEB | Cash and cash equivalents | Level 1 |  |  |
Pension and Other Postretirement Benefit Disclosures |  |  |
Financial instruments at fair value | 4 | 3 |
OPEB | Cash and cash equivalents | Total |  |  |
Pension and Other Postretirement Benefit Disclosures |  |  |
Financial instruments at fair value | 4 | 3 |
OPEB | United States government and government agency bonds | United States | Level 1 |  |  |
Pension and Other Postretirement Benefit Disclosures |  |  |
Financial instruments at fair value | 22 | 22 |
OPEB | United States government and government agency bonds | United States | Total |  |  |
Pension and Other Postretirement Benefit Disclosures |  |  |
Financial instruments at fair value | 22 | 22 |
OPEB | Equity funds | United States | Level 1 |  |  |
Pension and Other Postretirement Benefit Disclosures |  |  |
Financial instruments at fair value | 17 | 15 |
OPEB | Equity funds | United States | Level 2 |  |  |
Pension and Other Postretirement Benefit Disclosures |  |  |
Financial instruments at fair value | 19 | 14 |
OPEB | Equity funds | United States | Total |  |  |
Pension and Other Postretirement Benefit Disclosures |  |  |
Financial instruments at fair value | 36 | 29 |

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- Definition Assets, usually stocks, bonds, and other investments, that have been segregated and restricted (usually in a trust) to provide benefits, at their fair value as of the measurement date. Plan assets include amounts contributed by the employer (and by employees for a contributory plan) and amounts earned from investing the contributions, less benefits paid. If a plan has liabilities other than for benefits, those non-benefit obligations may be considered as reductions of plan assets. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 30 -Section 35 -Paragraph 50 -URI http://asc.fasb.org/extlink&oid=6867990&loc=d3e12355-114930 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 87 -Paragraph 49 -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 132R -Paragraph 5 -Subparagraph d(iv)(b)(i) -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 132R -Paragraph 5 -Subparagraph b -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=21915506&loc=d3e1928-114920 + Details
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