XML 170 R141.htm IDEA: XBRL DOCUMENT
v3.8.0.1

Fort Hills (Details) CAD in Millions | 12 Months Ended |  |
--- | --- | --- | ---
Dec. 31, 2017 CAD CAD / bbl $ / bbl bbl | Dec. 21, 2017 CAD | Dec. 31, 2016
Disclosure of joint operations |  |  |
Risk adjusted discount rate | 8.00% |  | 8.00%
Minimum |  |  |
Disclosure of joint operations |  |  |
Risk adjusted discount rate | 10.00% |  | 10.00%
Maximum |  |  |
Disclosure of joint operations |  |  |
Risk adjusted discount rate | 12.00% |  | 15.00%
Fort Hills oil sands project |  |  |
Disclosure of joint operations |  |  |
Interest purchased (as a percent) |  | 2.26% |
Consideration paid | CAD |  | CAD 308 |
Interest (as a percent) | 53.06% |  |
Impairment | CAD | CAD 0 |  |
Risk adjusted discount rate | 7.25% |  |
Number of barrels per day | bbl | 100,800 |  |
Ramp up period | 12 months |  |
operating costs averaging for the life of the project | CAD / bbl | 21.95 |  |
Decrease in the assumed realized price that decrease the recoverable amount (as a percent) | 5.00% |  |
Amount of decrease in the recoverable amount due to the decrease in the percentage of assumed realized price | CAD | CAD 1,100 |  |
Increase in the discount rate that decrease the recoverable amount (as a percent) | 1.00% |  |
Amount of decrease in the recoverable amount due to the increase in the percentage of discount rate | CAD | CAD 1,600 |  |
Increase in the estimated future operating costs would decrease the recoverable amount (as a percent) | 5.00% |  |
Decrease the recoverable amount | CAD | CAD 500 |  |
Carrying amount as at December 31 | CAD | CAD 11,800 |  |
Fort Hills oil sands project | Teck |  |  |
Disclosure of joint operations |  |  |
Interest purchased (as a percent) | 0.89% |  |
Interest (as a percent) | 20.89% |  |
Fort Hills oil sands project | Total |  |  |
Disclosure of joint operations |  |  |
Interest (as a percent) | 26.05% |  |
Fort Hills oil sands project | 2018 |  |  |
Disclosure of joint operations |  |  |
WCS price forecasts | $ / bbl | 56.40 |  |
Fort Hills oil sands project | 2019 |  |  |
Disclosure of joint operations |  |  |
WCS price forecasts | $ / bbl | 63.60 |  |
Fort Hills oil sands project | 2020 |  |  |
Disclosure of joint operations |  |  |
WCS price forecasts | $ / bbl | 65.60 |  |
Fort Hills oil sands project | 2021 |  |  |
Disclosure of joint operations |  |  |
WCS price forecasts | $ / bbl | 67.50 |  |
Fort Hills oil sands project | 2022 |  |  |
Disclosure of joint operations |  |  |
WCS price forecasts | $ / bbl | 71.60 |  |
Fort Hills oil sands project | Thereafter |  |  |
Disclosure of joint operations |  |  |
WCS price forecasts | $ / bbl | 75.00 |  |

X
- Definition The fair value, at acquisition date, of cash transferred as consideration in a business combination. [Refer: Business combinations [member]] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 3 -IssueDate 2017-01-01 -Paragraph B64 -Subparagraph f -Clause i -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IFRS&num=3&date=2017-03-01&anchor=para_B64_f_i&doctype=Appendix&seq=2 -URIDate 2017-03-09 + Details
Name: | ifrs-full_CashTransferred
Namespace Prefix: | ifrs-full_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition The discount rate applied to cash flow projections for a cash-generating unit (group of units). [Refer: Cash-generating units [member]] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 36 -IssueDate 2017-01-01 -Paragraph 134 -Subparagraph d -Clause v -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IAS&num=36&date=2017-03-01&anchor=para_134_d_v&doctype=Standard -URIDate 2017-03-09 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 36 -IssueDate 2017-01-01 -Paragraph 134 -Subparagraph e -Clause v -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IAS&num=36&date=2017-03-01&anchor=para_134_e_v&doctype=Standard -URIDate 2017-03-09 + Details
Name: | ifrs-full_DescriptionOfDiscountRatesAppliedToCashFlowProjections
Namespace Prefix: | ifrs-full_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | instant

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 amount recognised as a reduction of the carrying amount of an asset or cash-generating unit to its recoverable amount. [Refer: Carrying amount [member]] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 36 -IssueDate 2017-01-01 -Paragraph 130 -Subparagraph b -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IAS&num=36&date=2017-03-01&anchor=para_130_b&doctype=Standard -URIDate 2017-03-09 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 36 -IssueDate 2017-01-01 -Paragraph 130 -Subparagraph d -Clause ii -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IAS&num=36&date=2017-03-01&anchor=para_130_d_ii&doctype=Standard -URIDate 2017-03-09 + Details
Name: | ifrs-full_ImpairmentLoss
Namespace Prefix: | ifrs-full_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition The percentage of voting equity interests acquired in a business combination. [Refer: Business combinations [member]] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 3 -IssueDate 2017-01-01 -Paragraph B64 -Subparagraph c -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IFRS&num=3&date=2017-03-01&anchor=para_B64_c&doctype=Appendix&seq=2 -URIDate 2017-03-09 + Details
Name: | ifrs-full_PercentageOfVotingEquityInterestsAcquired
Namespace Prefix: | ifrs-full_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | instant

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 2017-01-01 -Paragraph 21 -Subparagraph a -Clause iv -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IFRS&num=12&date=2017-03-01&anchor=para_21_a_iv&doctype=Standard -URIDate 2017-03-09 + Details
Name: | ifrs-full_ProportionOfOwnershipInterestInJointOperation
Namespace Prefix: | ifrs-full_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | duration

X
- Definition The amount of decrease in the recoverable amount due to the decrease in the percentage of assumed realized price. + References No definition available. + Details
Name: | su_AmountOfDecreaseInRecoverableAmountDueToDecreaseInPercentageOfAssumedRealizedPrice
Namespace Prefix: | su_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition The amount of decrease in the recoverable amount due to the increase in the company's share of the remaining development capital. + References No definition available. + Details
Name: | su_AmountOfDecreaseInRecoverableAmountDueToIncreaseInPercentageOfDevelopmentCapital
Namespace Prefix: | su_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Amount of decrease in the recoverable amount due to the increase in the percentage of discount rate. + References No definition available. + Details
Name: | su_AmountOfDecreaseInRecoverableAmountDueToIncreaseInPercentageOfDiscountRate
Namespace Prefix: | su_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition The carrying amount for joint venture and associates during the period. + References No definition available. + Details
Name: | su_CarryingValue
Namespace Prefix: | su_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition The number of barrels by the entity at a date. + References No definition available. + Details
Name: | su_NumberOfBarrelsProducedPerDay
Namespace Prefix: | su_
Data Type: | num:volumeItemType
Balance Type: | na
Period Type: | instant

X
- Definition The amount of costs associated with operating cost of the entity. + References No definition available. + Details
Name: | su_OperatingCost
Namespace Prefix: | su_
Data Type: | us-types:perUnitItemType
Balance Type: | na
Period Type: | duration

X
- Definition Percentage of decrease in the assumed realized prices that would decrease the recoverable amount. + References No definition available. + Details
Name: | su_PercentageDecreaseInAssumedRealizedPricesThatDecreaseRecoverableAmount
Namespace Prefix: | su_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | duration

X
- Definition Percentage of increase in the discount rate that would decrease the recoverable amount . + References No definition available. + Details
Name: | su_PercentageIncreaseInDiscountRateThatDecreaseRecoverableAmount.
Namespace Prefix: | su_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | duration

X
- Definition Percentage of increase in the estimated future operating costs, that would decrease the recoverable amount . + References No definition available. + Details
Name: | su_PercentageIncreaseInEstimatedFutureOperatingCostsThatDecreaseRecoverableAmount
Namespace Prefix: | su_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | duration

X
- Definition The WCS price forecast per barrel. + References No definition available. + Details
Name: | su_PriceForecastPerBarrel
Namespace Prefix: | su_
Data Type: | us-types:perUnitItemType
Balance Type: | na
Period Type: | duration

X
- Definition The ramp up period . + References No definition available. + Details
Name: | su_RampUpPeriod
Namespace Prefix: | su_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

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_FortHillsOilSandsProjectMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_CounterpartiesAxis=su_TeckResourcesLimitedMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_CounterpartiesAxis=su_TotalEAndPCanadaLimitedMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_MaturityAxis=ifrs-full_NotLaterThanOneYearMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_MaturityAxis=ifrs-full_LaterThanOneYearAndNotLaterThanTwoYearsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_MaturityAxis=ifrs-full_LaterThanTwoYearsAndNotLaterThanThreeYearsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_MaturityAxis=ifrs-full_LaterThanThreeYearsAndNotLaterThanFourYearsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_MaturityAxis=ifrs-full_LaterThanFourYearsAndNotLaterThanFiveYearsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_MaturityAxis=ifrs-full_LaterThanFiveYearsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |