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Segmented Information - Summary of Net Assets for Company's Reporting Segments (Detail) - USD ($) $ in Millions | Dec. 31, 2019 | Dec. 31, 2018
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Summary of Net Assets for Company's Reporting Segments [Line Items] |  |
Segment Net Assets | $ 25,790 | $ 25,945
Cash and cash equivalents | 1,276 | 684
Deferred tax assets | 308 | 300
Income taxes receivable |  | 57
Accounts payable | 5,628 | 6,094
Accrued salaries and wages | 753 | 769
Other accrued liabilities | 1,800 | 1,734
Segment Reconciling Items [Member] | Deduct Assets Not Included in Segment Net Assets [Member] |  |
Summary of Net Assets for Company's Reporting Segments [Line Items] |  |
Segment Net Assets | 25,790 | 25,945
Cash and cash equivalents | (1,276) | (684)
Deferred tax assets | (308) | (300)
Long-term receivables from joint venture partners | (71) | (71)
Income taxes receivable |  | (57)
Accounts payable | (5,628) | (6,094)
Accrued salaries and wages | (753) | (769)
Other accrued liabilities | (1,800) | (1,734)
Liabilities held for sale |  | (408)
Operating Segments [Member] |  |
Summary of Net Assets for Company's Reporting Segments [Line Items] |  |
Segment Net Assets | $ 15,954 | $ 15,828

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