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Financial Instruments - Schedule of Company's Financial Assets and Liabilities (Detail) In Millions, unless otherwise specified | 12 Months Ended |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
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Dec. 31, 2013 USD ($) | Dec. 31, 2012 USD ($) | Dec. 31, 2013 Foreign Exchange Contract [Member] USD ($) | Dec. 31, 2012 Foreign Exchange Contract [Member] USD ($) | Dec. 31, 2013 Commodity Contract [Member] USD ($) | Dec. 31, 2012 Commodity Contract [Member] USD ($) | Dec. 31, 2013 Prepaid Expenses [Member] Foreign Exchange Contract [Member] USD ($) | Dec. 31, 2012 Prepaid Expenses [Member] Foreign Exchange Contract [Member] USD ($) | Dec. 31, 2013 Prepaid Expenses [Member] Commodity Contract [Member] USD ($) | Dec. 31, 2012 Prepaid Expenses [Member] Commodity Contract [Member] USD ($) | Dec. 31, 2013 Other Assets [Member] Foreign Exchange Contract [Member] USD ($) | Dec. 31, 2012 Other Assets [Member] Foreign Exchange Contract [Member] USD ($) | Dec. 31, 2013 Other Accrued Liabilities [Member] Foreign Exchange Contract [Member] USD ($) | Dec. 31, 2012 Other Accrued Liabilities [Member] Foreign Exchange Contract [Member] USD ($) | Dec. 31, 2013 Other Accrued Liabilities [Member] Commodity Contract [Member] USD ($) | Dec. 31, 2012 Other Accrued Liabilities [Member] Commodity Contract [Member] USD ($) | Dec. 31, 2013 Other Noncurrent Liabilities [Member] Foreign Exchange Contract [Member] USD ($) | Dec. 31, 2012 Other Noncurrent Liabilities [Member] Foreign Exchange Contract [Member] USD ($) | Dec. 31, 2013 Other Noncurrent Liabilities [Member] Commodity Contract [Member] USD ($) | Dec. 31, 2012 Other Noncurrent Liabilities [Member] Commodity Contract [Member] USD ($) | Dec. 31, 2013 Cash and Cash Equivalents [Member] USD ($) | Dec. 31, 2012 Cash and Cash Equivalents [Member] USD ($) | Dec. 31, 2013 Asset-backed Securities [Member] USD ($) | Dec. 31, 2013 Asset-backed Securities [Member] CAD | Dec. 31, 2012 Asset-backed Securities [Member] USD ($) | Dec. 31, 2012 Asset-backed Securities [Member] CAD
Held-for-trading |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Trading securities | $ 1,646 | $ 1,612 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 1,554 | $ 1,522 | $ 92 | 99 | $ 90 | 90
Held-to-maturity investments |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Severance investments | 5 | 8 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Available-for-sale investments |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Equity investments | 4 | 9 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Loans and receivables |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Accounts receivable | 5,246 | 4,774 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Long-term receivables included in other assets [note 12] | 111 | 95 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Total | 5,357 | 4,869 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Other financial liabilities |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Bank indebtedness | 41 | 71 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Long-term debt (including portion due within one year) | 332 | 361 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Accounts payable | 4,781 | 4,450 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Total | 5,154 | 4,882 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Derivatives designated as effective hedges, measured at fair value, Assets | 62 | 69 |  |  |  |  | 42 | 37 |  |  | 20 | 32 |  |  |  |  |  |  |  |  |  |  |  |  |  |
Derivatives designated as effective hedges, measured at fair value, Total | (4) | 47 | (3) | 49 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Derivatives designated as effective hedges, measured at fair value, Liabilities | $ (65) | $ (20) |  |  | $ (1) | $ (2) |  |  | $ 0 | $ 2 |  |  | $ (37) | $ (11) | $ (1) | $ (3) | $ (28) | $ (9) | $ 0 | $ (1) |  |  |  |  |  |

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