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Gains and Losses on Asset Sales (Detail) (CAD) In Millions, unless otherwise specified | 12 Months Ended
--- | ---
Dec. 31, 2013 | Dec. 31, 2012 | Dec. 31, 2011
Investment And Other Income [Line Items] |  |  |  |  |  |
Proceeds from asset sales | 160 |  | 226 |  | 314 |
Book value of assets sold | 10 |  | 132 |  | 117 |
Gain/(loss) on asset sales, before tax | 150 | [1] | 94 | [1] | 197 | [1]
Gain/(loss) on asset sales, after tax | 120 | [1] | 72 | [1] | 153 | [1]
[1] | 2013 included a gain of $85 million ($73 million after tax) for the sale of non-operating assets.

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- Definition Net gain (loss) on asset sales, after tax. + References No definition available. + Details
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- Definition Amount of gain (loss) on sale or disposal of assets, including but not limited to property plant and equipment, intangible assets and equity in securities of subsidiaries or equity method investee. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 360 -SubTopic 10 -Section 45 -Paragraph 5 -URI http://asc.fasb.org/extlink&oid=8077374&loc=d3e2443-110228 + Details
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- Definition The cash inflow from the sale of property, plant and equipment (capital expenditures), software, and other intangible assets. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Investing Activities -URI http://asc.fasb.org/extlink&oid=6516133 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 12 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3179-108585 + Details
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