XML 33 R48.htm IDEA: XBRL DOCUMENT
v2.4.0.8

Income Taxes (Parenthetical) (Detail) (CAD) In Millions, unless otherwise specified | 12 Months Ended
--- | ---
Dec. 31, 2013 | Dec. 31, 2012 | Dec. 31, 2011
Schedule Of Income Tax [Line Items] |  |  |
Cash outflow from income taxes, plus investment credits earned | 911 | 871 | 667

X
- Definition Net cash outflow resulting from current and deferred income tax expenses, plus investment tax credits earned. + References No definition available. + Details
Name: | imo_CashOutflowFromIncomeTaxesPlusInvestmentTaxCredit
Namespace Prefix: | imo_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Details
Name: | imo_ScheduleOfIncomeTaxLineItems
Namespace Prefix: | imo_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration