XML 138 R109.htm IDEA: XBRL DOCUMENT
v3.8.0.1

Debt And Credit Facilities-Credit facilities- (Details) - CAD CAD in Millions | 12 Months Ended |
--- | --- | ---
Dec. 31, 2017 | Dec. 31, 2016
Disclosure of detailed information about borrowings [line items] |  |
Total credit facilities | CAD 8,224.0 |
Total unutilized credit facilities | 4,721.0 |
Available credit facilities for liquidity purposes | 4,489.0 | CAD 7,467.0
Decrease in credit facility | 1,000.0 |
Fully revolving and expires in 2021 |  |
Disclosure of detailed information about borrowings [line items] |  |
Total credit facilities | 4,000.0 |
Fully revolving and expires in 2020 |  |
Disclosure of detailed information about borrowings [line items] |  |
Total credit facilities | 2,504.0 |
Fully revolving and expires in 2018/2019 |  |
Disclosure of detailed information about borrowings [line items] |  |
Total credit facilities | 1,580.0 |
Can be terminated at any time at the option of the lenders |  |
Disclosure of detailed information about borrowings [line items] |  |
Total credit facilities | 140.0 |
Credit facilities supporting outstanding commercial paper |  |
Disclosure of detailed information about borrowings [line items] |  |
Credit facilities assigned | (2,136.0) |
Credit facilities supporting standby letters of credit |  |
Disclosure of detailed information about borrowings [line items] |  |
Credit facilities assigned | (1,367.0) |
Cash collateral | 733.0 | CAD 1,032.0
COS | Credit facilities for general purposes | Debt Cancellation |  |
Disclosure of detailed information about borrowings [line items] |  |
Credit facility cancelled | CAD 950.0 |

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_DisclosureOfDetailedInformationAboutBorrowingsLineItems
Namespace Prefix: | ifrs-full_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition The amount of undrawn borrowing facilities that may be available for future operating activities and to settle capital commitments. [Refer: Capital commitments] + References Reference 1: http://www.xbrl.org/2003/role/exampleRef -Name IAS -Number 7 -IssueDate 2017-01-01 -Paragraph 50 -Subparagraph a -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IAS&num=7&date=2017-03-01&anchor=para_50_a&doctype=Standard -URIDate 2017-03-09 + Details
Name: | ifrs-full_UndrawnBorrowingFacilities
Namespace Prefix: | ifrs-full_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Represents the amount of cash provided towards collateral for credit facilities. + References No definition available. + Details
Name: | su_CashCollateralProvidedForCreditFacilities
Namespace Prefix: | su_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Represents the amount of credit facility that was cancelled during the period. + References No definition available. + Details
Name: | su_CreditFacilityCancellation
Namespace Prefix: | su_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition The amount of decrease in credit facility. + References No definition available. + Details
Name: | su_DecreaseInCreditFacility
Namespace Prefix: | su_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Represents the portion of line of credit facilities that are assigned for specific purposes. + References No definition available. + Details
Name: | su_LineOfCreditFacilitiesAssignedForSpecificPurposes
Namespace Prefix: | su_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition The amount of undrawn borrowing facilities for liquidity purposes that may be available for future operating activities and to settle capital commitments. + References No definition available. + Details
Name: | su_UnusedBorrowingFacilitiesForLiquidityPurposes
Namespace Prefix: | su_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Maximum borrowing capacity under the credit facility without consideration of any current restrictions on the amount that could be borrowed or the amounts currently outstanding under the facility. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.19(b),22(b)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
Name: | us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Details
Name: | ifrs-full_BorrowingsByNameAxis=su_FullyRevolvingCreditFacilitiesThatExpireIn2021Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_BorrowingsByNameAxis=su_FullyRevolvingCreditFacilitiesThatExpireIn2020Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_BorrowingsByNameAxis=su_FullyRevolvingCreditFacilitiesThatExpireIn20182019Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_BorrowingsByNameAxis=su_CreditFacilitiesThatCanBeTerminatedAtAnyTimeByLenderMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_BorrowingsByNameAxis=su_CreditFacilitiesSupportingOutstandingCommercialPaperMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_BorrowingsByNameAxis=su_CreditFacilitiesSupportingStandbyLettersOfCreditMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_BusinessCombinationsAxis=su_CanadianOilSandsLimitedMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_BorrowingsByNameAxis=su_CreditFacilitiesForGeneralPurposesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_NonadjustingEventsAfterReportingPeriodAxis=su_DebtCancellationMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |