XML 56 R42.htm IDEA: XBRL DOCUMENT
v2.4.1.9

Other comprehensive income information (Tables) | 12 Months Ended
--- | ---
Dec. 31, 2014
Changes in Accumulated Other Comprehensive Income | Changes in accumulated other comprehensive income:
millions of dollars |  | 2014 |  | 2013 |  | 2012
Balance as at January 1 |  | (1,721) |  | (2,455) |  | (2,238)
Post-retirement benefits liability adjustment: |  |  |  |  |  |
Current period change excluding amounts reclassified from accumulated other comprehensive income |  | (483) |  | 529 |  | (415)
Amounts reclassified from accumulated other comprehensive income |  | 145 |  | 205 |  | 198
Balance as at December 31 |  | (2,059) |  | (1,721) |  | (2,455)
Amounts Reclassified Out of Accumulated Other Comprehensive Income Before-Tax Income/(Expense) | Amounts reclassified out of accumulated other comprehensive income – before tax income/(expense)
millions of dollars |  | 2014 |  | 2013 |  | 2012
Amortization of post-retirement benefits liability adjustment included in net periodic benefit cost (a) |  | (196) |  | (276) |  | (266)
| (a) | This accumulated other comprehensive income component is included in the computation of net periodic benefit cost (note 4).
Schedule of Income Tax Expense/(Credit) for Components of Other Comprehensive Income | Income tax expense/(credit) for components of other comprehensive income
millions of dollars |  | 2014 |  | 2013 |  | 2012
Post-retirement benefits adjustments: |  |  |  |  |  |
Post-retirement benefits liability adjustment (excluding amortization) |  | (169) |  | 185 |  | (155)
Amortization of post-retirement benefits liability adjustment included in net periodic benefit cost |  | 51 |  | 71 |  | 68
Total |  | (118) |  | 256 |  | (87)

X
- Definition Schedule Of Income Tax Expense For Components Of Comprehensive Income + References No definition available. + Details
Name: | imo_ScheduleOfIncomeTaxExpenseForComponentsOfComprehensiveIncomeTableTextBlock
Namespace Prefix: | imo_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- Definition Tabular disclosure of information about items reclassified out of accumulated other comprehensive income (loss). + References No definition available. + Details
Name: | us-gaap_ReclassificationOutOfAccumulatedOtherComprehensiveIncomeTableTextBlock
Namespace Prefix: | us-gaap_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- Definition Tabular disclosure of the components of accumulated other comprehensive income (loss). + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section 45 -Paragraph 14A -URI http://asc.fasb.org/extlink&oid=36458714&loc=SL7669686-108580 + Details
Name: | us-gaap_ScheduleOfAccumulatedOtherComprehensiveIncomeLossTableTextBlock
Namespace Prefix: | us-gaap_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration