The fair value, at acquisition date, of the consideration transferred in a business combination. [Refer: Business combinations [member]]

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Line items represent concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes of the table.

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The number of instruments or interests issued or issuable at acquisition date for equity interests of the acquirer transferred as consideration in a business combination.

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The percentage of voting equity interests acquired in a business combination. [Refer: Business combinations [member]]

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Represents the share exchange ratio for shares to be paid on business combination.

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Represents the number of shares of the acquiree, acquired in business combination.

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Price of a single share of a number of saleable stocks of the entity on acquisition date.

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Acquisition Of Canadian Oil Sands Limited (Details) CAD / shares in Units, item in Millions, CAD in Millions	Feb. 05, 2016 CAD item CAD / shares shares	Jun. 23, 2016	Mar. 21, 2016 CAD item shares	Feb. 22, 2016 item shares
COS
Disclosure of detailed information about business combination [line items]
Percentage of voting equity interests acquired	73.00%
Purchase Price Consideration
Number of common shares tendered (millions)	353,300,000		131,300,000	131,300,000
Multiplied by share exchange ratio	0.28
Number of Suncor common shares issued \| item	98.9		36.7	36.7
Share price on acquisition date \| CAD / shares	CAD 31.88
Fair value of consideration ($ millions) \| CAD	CAD 3,154.0		CAD 4,452.0
Syncrude
Disclosure of detailed information about business combination [line items]
Percentage of voting equity interests acquired		53.74%
Equity interest percentage held	36.74%