XML 154 R125.htm IDEA: XBRL DOCUMENT
v3.10.0.1

Joint Arrangements - Joint Operations (Details) | 12 Months Ended
--- | ---
Dec. 31, 2018 | Dec. 31, 2017
Fort Hills Energy Limited Partnership |  |
Disclosure of joint operations |  |
Ownership interest (as percent) | 54.11% | 53.06%
Syncrude |  |
Disclosure of joint operations |  |
Ownership interest (as percent) | 58.74% | 53.74%
Terra Nova |  |
Disclosure of joint operations |  |
Ownership interest (as percent) | 37.68% | 37.68%
Buzzard |  |
Disclosure of joint operations |  |
Ownership interest (as percent) | 29.89% | 29.89%
Fenja Development JV |  |
Disclosure of joint operations |  |
Ownership interest (as percent) | 17.50% |
Golden Eagle Area Development |  |
Disclosure of joint operations |  |
Ownership interest (as percent) | 26.69% | 26.69%
Hibernia and the Hibernia South Extension Unit | Minimum |  |
Disclosure of joint operations |  |
Ownership interest (as percent) | 19.19% | 19.19%
Hibernia and the Hibernia South Extension Unit | Maximum |  |
Disclosure of joint operations |  |
Ownership interest (as percent) | 20.00% | 20.00%
Hebron |  |
Disclosure of joint operations |  |
Ownership interest (as percent) | 21.03% | 21.03%
Harouge Oil Operations |  |
Disclosure of joint operations |  |
Ownership interest (as percent) | 49.00% | 49.00%
North Sea Rosebank Project |  |
Disclosure of joint operations |  |
Ownership interest (as percent) | 40.00% | 30.00%
Oda |  |
Disclosure of joint operations |  |
Ownership interest (as percent) | 30.00% | 30.00%
White Rose and the White Rose Extensions | Minimum |  |
Disclosure of joint operations |  |
Ownership interest (as percent) | 26.13% | 26.13%
White Rose and the White Rose Extensions | Maximum |  |
Disclosure of joint operations |  |
Ownership interest (as percent) | 27.50% | 27.50%

X
- Definition 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. + References No definition available. + Details
Name: | ifrs-full_DisclosureOfJointOperationsLineItems
Namespace Prefix: | ifrs-full_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition The proportion of ownership interest in a joint operation attributable to the entity. [Refer: Joint operations [member]] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 12 -IssueDate 2018-01-01 -Paragraph 21 -Subparagraph a -Clause iv -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IFRS&num=12&date=2018-03-01&anchor=para_21_a_iv&doctype=Standard -URIDate 2018-03-16 + Details
Name: | ifrs-full_ProportionOfOwnershipInterestInJointOperation
Namespace Prefix: | ifrs-full_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | duration

X
- Details
Name: | ifrs-full_JointOperationsAxis=su_FortHillsEnergyLimitedPartnershipOperatedBySuncorJointOperationsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_JointOperationsAxis=su_SyncrudeNonOperatedByJointOperationsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_JointOperationsAxis=su_TerraNovaOperatedBySuncorJointOperationsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_JointOperationsAxis=su_BuzzardNonOperatedByJointOperationsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_JointOperationsAxis=su_FenjaDevelopmentJvNonOperatedByJointOperationsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_JointOperationsAxis=su_GoldenEagleAreaDevelopmentNonOperatedByJointOperationMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_JointOperationsAxis=su_HiberniaAndHiberniaSouthExtensionUnitNonOperatedByJointOperationMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_RangeAxis=ifrs-full_BottomOfRangeMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_RangeAxis=ifrs-full_TopOfRangeMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_JointOperationsAxis=su_HebronNonOperatedByJointOperationMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_JointOperationsAxis=su_HarougeOilOperationsNonOperatedByJointOperationMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_JointOperationsAxis=su_NorthSeaRosebankProjectMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_JointOperationsAxis=su_OdaNonOperatedByJointOperationMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_JointOperationsAxis=su_WhiteRoseAndWhiteRoseExtensionsNonOperatedByJointOperationMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |