XML 131 R105.htm IDEA: XBRL DOCUMENT
v3.20.4

PROVISIONS (Details) $ in Millions | 12 Months Ended |
--- | --- | ---
Dec. 31, 2020 CAD ($) | Dec. 31, 2019 CAD ($) | Jan. 01, 2019 CAD ($)
PROVISIONS |  |  |
Beginning balance | $ 9,307 | $ 7,651 |
Adoption of IFRS 16 impact |  |  | $ (21)
At January 1, 2019, adjusted |  |  | 7,630
Liabilities incurred | 1,173 | 402 |
Change in discount rate | 402 | 1,344 |
Changes in estimates | (334) | 169 |
Liabilities settled | (242) | (478) |
Accretion | 278 | 270 |
Asset disposals |  | (1) |
Foreign exchange | (2) | (29) |
Ending balance | 10,582 | 9,307 |
Less: current portion | (527) | (631) |
Non-current provisions | 10,055 | 8,676 |
Provisions for transportation expense before tax | 186 |  |
Provisions for transportation expense after tax | 142 |  |
Decommissioning and Restoration |  |  |
PROVISIONS |  |  |
Beginning balance | 8,898 | 7,239 |
At January 1, 2019, adjusted |  |  | 7,239
Liabilities incurred | 967 | 346 |
Change in discount rate | 402 | 1,344 |
Changes in estimates | (268) | 193 |
Liabilities settled | (231) | (464) |
Accretion | 278 | 270 |
Asset disposals |  | (1) |
Foreign exchange | (2) | (29) |
Ending balance | 10,044 | 8,898 |
Less: current portion | (250) | (475) |
Non-current provisions | 9,794 | 8,423 |
Total undiscounted amount of estimated future cash flows required | $ 14,100 | $ 12,900 |
Weighted average credit adjusted risk free interest rate | 3.10 | 3.30 |
Decommissioning and restoration provision settlement term | 50 years |  |
Royalties |  |  |
PROVISIONS |  |  |
Beginning balance | $ 133 | $ 98 |
At January 1, 2019, adjusted |  |  | 98
Liabilities incurred | 16 | 60 |
Changes in estimates | (71) | (25) |
Liabilities settled | (7) |  |
Ending balance | 71 | 133 |
Less: current portion | (71) | (133) |
Other |  |  |
PROVISIONS |  |  |
Beginning balance | 276 | 314 |
Adoption of IFRS 16 impact |  |  | (21)
At January 1, 2019, adjusted |  |  | $ 293
Liabilities incurred | 190 | (4) |
Changes in estimates | 5 | 1 |
Liabilities settled | (4) | (14) |
Ending balance | 467 | 276 |
Less: current portion | (206) | (23) |
Non-current provisions | $ 261 | $ 253 |

X
- Definition The amount of current provisions. [Refer: Provisions] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 1 -IssueDate 2020-01-01 -Paragraph 54 -Subparagraph l -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=1&code=ifrs-tx-2020-en-r&anchor=para_54_l&doctype=Standard -URIDate 2020-01-01 + Details
Name: | ifrs-full_CurrentProvisions
Namespace Prefix: | ifrs-full_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
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_DisclosureOfOtherProvisionsLineItems
Namespace Prefix: | ifrs-full_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition The increase (decrease) in other provisions resulting from a change in discount rate. [Refer: Other provisions] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 37 -IssueDate 2020-01-01 -Paragraph 84 -Subparagraph e -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=37&code=ifrs-tx-2020-en-r&anchor=para_84_e&doctype=Standard -URIDate 2020-01-01 + Details
Name: | ifrs-full_IncreaseDecreaseThroughChangeInDiscountRateOtherProvisions
Namespace Prefix: | ifrs-full_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition The increase (decrease) in other provisions resulting from foreign currency exchange rate changes on provisions measured in a currency different from the entity's presentation currency. [Refer: Other provisions] + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Name IAS -Number 37 -IssueDate 2020-01-01 -Paragraph 84 -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=37&code=ifrs-tx-2020-en-r&anchor=para_84&doctype=Standard -URIDate 2020-01-01 + Details
Name: | ifrs-full_IncreaseDecreaseThroughNetExchangeDifferencesOtherProvisions
Namespace Prefix: | ifrs-full_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition The amount of non-current provisions. [Refer: Provisions] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 1 -IssueDate 2020-01-01 -Paragraph 54 -Subparagraph l -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=1&code=ifrs-tx-2020-en-r&anchor=para_54_l&doctype=Standard -URIDate 2020-01-01 + Details
Name: | ifrs-full_NoncurrentProvisions
Namespace Prefix: | ifrs-full_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition The amount used (ie incurred and charged against the provision) for other provisions. [Refer: Other provisions] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 37 -IssueDate 2020-01-01 -Paragraph 84 -Subparagraph c -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=37&code=ifrs-tx-2020-en-r&anchor=para_84_c&doctype=Standard -URIDate 2020-01-01 + Details
Name: | ifrs-full_ProvisionUsedOtherProvisions
Namespace Prefix: | ifrs-full_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition The amount of liabilities of uncertain timing or amount. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 1 -IssueDate 2020-01-01 -Paragraph 54 -Subparagraph l -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=1&code=ifrs-tx-2020-en-r&anchor=para_54_l&doctype=Standard -URIDate 2020-01-01 + Details
Name: | ifrs-full_Provisions
Namespace Prefix: | ifrs-full_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Amount after tax of increase (decrease) to provisions, resulting from the cumulative effect adjustment of a new accounting principle applied in the period of adoption. + References No definition available. + Details
Name: | su_CumulativeEffectOfNewAccountingPrincipleInPeriodOfAdoptionProvisions
Namespace Prefix: | su_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition The decrease in other provisions resulting from disposals. + References No definition available. + Details
Name: | su_DecreaseThroughDisposalsOtherProvisions
Namespace Prefix: | su_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Increase (decrease) in provisions through accretion. + References No definition available. + Details
Name: | su_IncreaseDecreaseInProvisionsThroughAccretion
Namespace Prefix: | su_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Increase (decrease) in provisions through changes in estimates. + References No definition available. + Details
Name: | su_IncreaseDecreaseInProvisionsThroughChangesInEstimates
Namespace Prefix: | su_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Period over which payments to settle decommissioning and restoration provisions associated with retirement of Property , Plant and Equipment and exploration and evaluation asset in 'PnYnMnDTnHnMnS' format , for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days. + References No definition available. + Details
Name: | su_PaymentToSettleDecommissioningAndRestorationProvisionsTerm
Namespace Prefix: | su_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

X
- Definition Amount of provisions, after the cumulative effect adjustment of a new accounting principle applied in the period of adoption. + References No definition available. + Details
Name: | su_ProvisionsAdjustedForCumulativeEffectOfNewAccountingPrincipleInPeriodOfAdoption
Namespace Prefix: | su_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition The amount of provisions for transportation expense after tax. + References No definition available. + Details
Name: | su_ProvisionsForTransportationExpenseAfterTax
Namespace Prefix: | su_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition The amount of provisions for transportation expense before tax. + References No definition available. + Details
Name: | su_ProvisionsForTransportationExpenseBeforeTax
Namespace Prefix: | su_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition The amount of liabilities incurred. + References No definition available. + Details
Name: | su_ProvisionsLiabilitiesIncurred
Namespace Prefix: | su_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Represents the amount of undiscounted estimate of future cash flows for asset retirement. + References No definition available. + Details
Name: | su_UndiscountedEstimateOfFutureCashFlowsForAssetRetirement
Namespace Prefix: | su_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Represents the weighted average credit adjusted risk free interest rate used to discount the decommissioning and restoration provision. + References No definition available. + Details
Name: | su_WeightedAverageCreditAdjustedRiskFreeInterestRate
Namespace Prefix: | su_
Data Type: | xbrli:pureItemType
Balance Type: | na
Period Type: | instant

X
- Details
Name: | ifrs-full_ClassesOfProvisionsAxis=ifrs-full_ProvisionForDecommissioningRestorationAndRehabilitationCostsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_ClassesOfProvisionsAxis=su_ProvisionForRoyaltiesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_ClassesOfProvisionsAxis=ifrs-full_MiscellaneousOtherProvisionsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |