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Segmented Information - Schedule of Information with Respect to Segment (Parenthetical) (Detail) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015
Segment Reporting [Abstract]
Net income from continuing operations	$ 2,074	$ 1,940
Add (deduct):
Interest expense, net	88	44
Other expense (income), net	30	(166)
Income taxes	706	711
Adjusted EBIT	$ 2,898	$ 2,529

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Add Deduct [Abstract]

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Adjusted earning before interest and tax.

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Amount after tax of income (loss) from continuing operations attributable to the parent.

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Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 28
-URI http://asc.fasb.org/extlink&oid=66902209&loc=d3e3602-108585

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Amount of current income tax expense (benefit) and deferred income tax expense (benefit) pertaining to continuing operations.

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Reference 1: http://www.xbrl.org/2003/role/presentationRef
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