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Asset Allocation Ranges and Actual Allocation, CRIP (Detail) (Canadian Retirement Income Plan, or CRIP)
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12 Months Ended | |
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Dec. 31, 2012
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Dec. 31, 2011
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Canadian Equities
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| Defined Benefit Plan Disclosure [Line Items] | ||
| Range minimum | 25.00% | |
| Range maximum | 50.00% | |
| Actual | 35.60% | 34.80% |
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U.S. Equities
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| Defined Benefit Plan Disclosure [Line Items] | ||
| Range minimum | 0.00% | |
| Range maximum | 19.00% | |
| Actual | 0.00% | 5.20% |
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International Equities
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| Defined Benefit Plan Disclosure [Line Items] | ||
| Range minimum | 0.00% | |
| Range maximum | 19.00% | |
| Actual | 14.10% | 8.90% |
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Fixed Income
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| Defined Benefit Plan Disclosure [Line Items] | ||
| Range minimum | 30.00% | |
| Range maximum | 70.00% | |
| Actual | 49.90% | 50.50% |
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Money Market
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| Defined Benefit Plan Disclosure [Line Items] | ||
| Range minimum | 0.00% | |
| Range maximum | 10.00% | |
| Actual | 0.40% | 0.60% |
| X | ||||||||||
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- Details
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| X | ||||||||||
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- Definition
Target allocation maximum percentage of investments of this type to total plan assets presented on a weighted average basis. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
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- Definition
Target allocation minimum percentage of investments of this type to total plan assets presented on a weighted average basis. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
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- Definition
Percentage of fair value of investments (categorized by debt securities, equity securities, real estate and other plan assets) to the fair value of plan assets held. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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