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Financial Instruments - Schedule of Company's Financial Assets and Liabilities (Detail) - USD ($) $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2017 | Dec. 31, 2016
Financial assets |  |
Cash and cash equivalents | $ 726 | $ 974
Restricted cash equivalents | 113 | 194
Investment in ABCP |  | 60
Accounts receivable | 6,878 | 6,165
Severance investments | 4 | 3
Long-term receivables included in other assets [note 13] | 180 | 229
Total | 7,901 | 7,625
Financial liabilities |  |
Bank indebtedness [note 16] | 259 | 623
Long-term debt (including portion due within one year) | 3,303 | 2,533
Accounts payable | 6,299 | 5,430
Other Liabilities, Total | 9,861 | 8,586
Other assets | 101 | 18
Other accrued liabilities | (49) | (195)
Liabilities, Net Amounts | (2) | (178)
Foreign Exchange Contract [Member] |  |
Financial liabilities |  |
Liabilities, Net Amounts | 52 | (177)
Prepaid Expenses and Other [Member] | Foreign Exchange Contract [Member] |  |
Financial liabilities |  |
Other assets | 55 | 12
Other Assets [Member] | Foreign Exchange Contract [Member] |  |
Financial liabilities |  |
Other assets | 46 | 6
Other Accrued Liabilities [Member] | Foreign Exchange Contract [Member] |  |
Financial liabilities |  |
Other accrued liabilities | (32) | (134)
Other Long-term Liabilities [Member] | Foreign Exchange Contract [Member] |  |
Financial liabilities |  |
Other accrued liabilities | (17) | (61)
Bank Indebtedness [Member] |  |
Financial liabilities |  |
Bank indebtedness [note 16] | 9 | 8
Commercial Paper [Member] |  |
Financial liabilities |  |
Bank indebtedness [note 16] | $ 250 | $ 615

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