XML 40 R102.htm IDEA: XBRL DOCUMENT
v3.19.3.a.u2

DEBT AND CREDIT FACILITIES (Details) $ / shares in Units, $ in Millions, $ in Millions | 3 Months Ended | 12 Months Ended |  |  |  |  |  |
--- | --- | --- | --- | --- | --- | --- | --- | ---
Jun. 30, 2019 USD ($) | Jun. 30, 2019 USD ($) $ / shares | Dec. 31, 2018 USD ($) | Dec. 31, 2018 CAD ($) | Dec. 31, 2019 USD ($) | Dec. 31, 2019 CAD ($) | Jun. 30, 2019 CAD ($) | Jan. 01, 2019 CAD ($) | Dec. 31, 2018 CAD ($) | Feb. 05, 2016 | Feb. 04, 2016
Disclosure of detailed information about borrowings [line items] |  |  |  |  |  |  |  |  |  |  |
Commercial papers issued |  |  |  |  |  | $ 2,155.0 |  |  | $ 3,231.0 |  |
Interest rate on notes |  |  | 5.40% |  | 5.30% | 5.30% |  |  | 5.40% |  |
Finance leases |  |  |  |  |  |  |  |  | $ 1,260.0 |  |
Lease liability |  |  | $ 1,792 |  |  | $ 2,931.0 |  |  |  |  |
Deferred financing costs |  |  |  |  |  | (43.0) |  |  | (41.0) |  |
Longterm borrowings net of deferred financing costs |  |  |  |  |  | 15,815.0 |  |  | 14,119.0 |  |
Current portion of longterm debt and lease liabilities |  |  |  |  |  |  |  |  |  |  |
Current finance leases |  |  |  |  |  |  |  |  | (38.0) |  |
Current portion of lease liabilities |  |  |  |  |  | (310.0) |  | $ (276.0) |  |  |
Long - term debt |  |  |  |  |  |  |  |  | (191.0) |  |
Current portion of long-term debt |  |  |  |  |  | (310.0) |  | (191.0) | (229.0) |  |
Long-term lease liabilities |  |  |  |  |  | 2,621.0 |  | 2,777.0 |  |  |
Long-term Debt |  |  |  |  |  | $ 12,884.0 |  | $ 12,668.0 | 13,890.0 |  |
Minimum |  |  |  |  |  |  |  |  |  |  |
Additional information |  |  |  |  |  |  |  |  |  |  |
Finance lease interest rate |  |  |  |  | 2.9 | 2.9 |  |  |  |  |
Interest rate on lease liabilities |  |  |  |  | 2.00% | 2.00% |  |  |  |  |
Maximum |  |  |  |  |  |  |  |  |  |  |
Additional information |  |  |  |  |  |  |  |  |  |  |
Finance lease interest rate |  |  |  |  | 16.5 | 16.5 |  |  |  |  |
Interest rate on lease liabilities |  |  |  |  | 14.20% | 14.20% |  |  |  |  |
Commercial paper |  |  |  |  |  |  |  |  |  |  |
Disclosure of detailed information about borrowings [line items] |  |  |  |  |  |  |  |  |  |  |
Commercial papers issued |  |  |  |  |  | $ 2,155.0 |  |  | $ 3,231.0 |  |
Commercial paper | Maximum |  |  |  |  |  |  |  |  |  |  |
Disclosure of detailed information about borrowings [line items] |  |  |  |  |  |  |  |  |  |  |
Commercial paper authorized to be issued |  |  |  |  |  | $ 5,000.0 |  |  |  |  |
Commercial paper term |  |  |  |  | 365 days |  |  |  |  |  |
Commercial paper | Weighted average |  |  |  |  |  |  |  |  |  |  |
Disclosure of detailed information about borrowings [line items] |  |  |  |  |  |  |  |  |  |  |
Interest rate on notes |  |  | 2.88% |  | 2.05% | 2.05% |  |  | 2.88% |  |
Fixed Term Notes |  |  |  |  |  |  |  |  |  |  |
Disclosure of detailed information about borrowings [line items] |  |  |  |  |  |  |  |  |  |  |
Total unsecured long term debt |  |  |  |  |  | $ 12,927.0 |  |  | $ 12,900.0 |  |
Notes 7.75 Percent Due 2019 |  |  |  |  |  |  |  |  |  |  |
Disclosure of detailed information about borrowings [line items] |  |  |  |  |  |  |  |  |  |  |
Interest rate on notes | 7.75% | 7.75% | 7.75% |  | 7.75% | 7.75% | 7.75% |  | 7.75% |  |
Total unsecured long term debt |  |  | $ 140 |  | $ 140 |  |  |  | $ 191.0 |  |
Additional information |  |  |  |  |  |  |  |  |  |  |
Long-term debt repaid | $ 140 |  | 83 |  |  |  |  |  |  |  |
Book value |  |  |  |  |  |  | $ 188.0 |  | 109.0 |  |
Original borrowings maturity amount | 145 | $ 145 | 88 |  |  |  | 195.0 |  | 116.0 |  |
Accrued interest | $ 5 | $ 5 | $ 3 |  |  |  | $ 7.0 |  | $ 4.0 |  |
Loss on extinguishment of long-term debt |  |  |  | $ 3.0 |  |  |  |  |  |  |
Loss on debt extinguishment, net of tax |  |  |  | $ 2.0 |  |  |  |  |  |  |
3.10% Series 5 Medium Term Notes, due 2021 |  |  |  |  |  |  |  |  |  |  |
Disclosure of detailed information about borrowings [line items] |  |  |  |  |  |  |  |  |  |  |
Interest rate on notes |  |  | 3.10% |  | 3.10% | 3.10% |  |  | 3.10% |  |
Total unsecured long term debt |  |  |  |  |  | $ 749.0 |  |  | $ 749.0 |  |
Debentures 9.25 Percent Due 2021 |  |  |  |  |  |  |  |  |  |  |
Disclosure of detailed information about borrowings [line items] |  |  |  |  |  |  |  |  |  |  |
Interest rate on notes |  |  | 9.25% |  | 9.25% | 9.25% |  |  | 9.25% |  |
Total unsecured long term debt |  |  | $ 300 |  | $ 300 | $ 403.0 |  |  | $ 431.0 |  |
Notes 9.40 Percent Due 2021 |  |  |  |  |  |  |  |  |  |  |
Disclosure of detailed information about borrowings [line items] |  |  |  |  |  |  |  |  |  |  |
Interest rate on notes |  |  | 9.40% |  | 9.40% | 9.40% |  |  | 9.40% |  |
Total unsecured long term debt |  |  | $ 220 |  | $ 220 | $ 292.0 |  |  | $ 315.0 |  |
Additional information |  |  |  |  |  |  |  |  |  |  |
Revised debt coupon rate following ratings downgrade by Moodys |  |  |  |  |  |  |  |  |  | 9.40% | 7.90%
Notes 4.50 Percent Due 2022 |  |  |  |  |  |  |  |  |  |  |
Disclosure of detailed information about borrowings [line items] |  |  |  |  |  |  |  |  |  |  |
Interest rate on notes |  |  | 4.50% |  | 4.50% | 4.50% |  |  | 4.50% |  |
Total unsecured long term debt |  |  | $ 182 |  | $ 182 | $ 225.0 |  |  | $ 234.0 |  |
Notes 3.60 Percent Due 2024 |  |  |  |  |  |  |  |  |  |  |
Disclosure of detailed information about borrowings [line items] |  |  |  |  |  |  |  |  |  |  |
Interest rate on notes |  |  | 3.60% |  | 3.60% | 3.60% |  |  | 3.60% |  |
Total unsecured long term debt |  |  | $ 750 |  | $ 750 | $ 968.0 |  |  | $ 1,020.0 |  |
3.00% Series 5 Medium Term Notes, due 2026 |  |  |  |  |  |  |  |  |  |  |
Disclosure of detailed information about borrowings [line items] |  |  |  |  |  |  |  |  |  |  |
Interest rate on notes |  |  | 3.00% |  | 3.00% | 3.00% |  |  | 3.00% |  |
Total unsecured long term debt |  |  |  |  |  | $ 698.0 |  |  | $ 698.0 |  |
Debentures 7.875 Percent Due 2026 |  |  |  |  |  |  |  |  |  |  |
Disclosure of detailed information about borrowings [line items] |  |  |  |  |  |  |  |  |  |  |
Interest rate on notes |  |  | 7.875% |  | 7.875% | 7.875% |  |  | 7.875% |  |
Total unsecured long term debt |  |  | $ 275 |  | $ 275 | $ 372.0 |  |  | $ 393.0 |  |
Notes 8.20 Percent Due 2027 |  |  |  |  |  |  |  |  |  |  |
Disclosure of detailed information about borrowings [line items] |  |  |  |  |  |  |  |  |  |  |
Interest rate on notes |  |  | 8.20% |  | 8.20% | 8.20% |  |  | 8.20% |  |
Total unsecured long term debt |  |  | $ 59 |  | $ 59 | $ 82.0 |  |  | $ 87.0 |  |
Debentures 7.00 Percent Due 2028 |  |  |  |  |  |  |  |  |  |  |
Disclosure of detailed information about borrowings [line items] |  |  |  |  |  |  |  |  |  |  |
Interest rate on notes |  |  | 7.00% |  | 7.00% | 7.00% |  |  | 7.00% |  |
Total unsecured long term debt |  |  | $ 250 |  | $ 250 | $ 329.0 |  |  | $ 346.0 |  |
3.10% Series 6 Medium Term Notes, due 2029 |  |  |  |  |  |  |  |  |  |  |
Disclosure of detailed information about borrowings [line items] |  |  |  |  |  |  |  |  |  |  |
Interest rate on notes | 3.10% | 3.10% | 3.10% |  | 3.10% | 3.10% | 3.10% |  | 3.10% |  |
Total unsecured long term debt |  |  |  |  |  | $ 750.0 |  |  |  |  |
Additional information |  |  |  |  |  |  |  |  |  |  |
Senior unsecured notes issued |  |  |  |  |  |  | $ 750.0 |  |  |  |
Debt instrument issue price | $ / shares |  | $ 99.761 |  |  |  |  |  |  |  |  |
Effective yield | 3.128% | 3.128% |  |  |  |  | 3.128% |  |  |  |
Notes 7.15 Percent Due 2032 |  |  |  |  |  |  |  |  |  |  |
Disclosure of detailed information about borrowings [line items] |  |  |  |  |  |  |  |  |  |  |
Interest rate on notes |  |  | 7.15% |  | 7.15% | 7.15% |  |  | 7.15% |  |
Total unsecured long term debt |  |  | $ 500 |  | $ 500 | $ 647.0 |  |  | $ 681.0 |  |
Notes 5.35 Percent Due 2033 |  |  |  |  |  |  |  |  |  |  |
Disclosure of detailed information about borrowings [line items] |  |  |  |  |  |  |  |  |  |  |
Interest rate on notes |  |  | 5.35% |  | 5.35% | 5.35% |  |  | 5.35% |  |
Total unsecured long term debt |  |  | $ 300 |  | $ 300 | $ 361.0 |  |  | $ 379.0 |  |
Notes 5.95 Percent Due 2034 |  |  |  |  |  |  |  |  |  |  |
Disclosure of detailed information about borrowings [line items] |  |  |  |  |  |  |  |  |  |  |
Interest rate on notes |  |  | 5.95% |  | 5.95% | 5.95% |  |  | 5.95% |  |
Total unsecured long term debt |  |  | $ 500 |  | $ 500 | $ 646.0 |  |  | $ 680.0 |  |
Notes 5.95 Percent Due 2035 |  |  |  |  |  |  |  |  |  |  |
Disclosure of detailed information about borrowings [line items] |  |  |  |  |  |  |  |  |  |  |
Interest rate on notes |  |  | 5.95% |  | 5.95% | 5.95% |  |  | 5.95% |  |
Total unsecured long term debt |  |  | $ 600 |  | $ 600 | $ 747.0 |  |  | $ 786.0 |  |
5.39% Series 4 Medium Term Notes, due 2037 |  |  |  |  |  |  |  |  |  |  |
Disclosure of detailed information about borrowings [line items] |  |  |  |  |  |  |  |  |  |  |
Interest rate on notes |  |  | 5.39% |  | 5.39% | 5.39% |  |  | 5.39% |  |
Total unsecured long term debt |  |  |  |  |  | $ 599.0 |  |  | $ 599.0 |  |
Notes 6.50 Percent Due 2038 |  |  |  |  |  |  |  |  |  |  |
Disclosure of detailed information about borrowings [line items] |  |  |  |  |  |  |  |  |  |  |
Interest rate on notes |  |  | 6.50% |  | 6.50% | 6.50% |  |  | 6.50% |  |
Total unsecured long term debt |  |  | $ 1,150 |  | $ 1,150 | $ 1,487.0 |  |  | $ 1,565.0 |  |
Notes 6.80 Percent Due 2038 |  |  |  |  |  |  |  |  |  |  |
Disclosure of detailed information about borrowings [line items] |  |  |  |  |  |  |  |  |  |  |
Interest rate on notes |  |  | 6.80% |  | 6.80% | 6.80% |  |  | 6.80% |  |
Total unsecured long term debt |  |  | $ 900 |  | $ 900 | $ 1,186.0 |  |  | $ 1,249.0 |  |
Notes 6.85 Percent Due 2039 |  |  |  |  |  |  |  |  |  |  |
Disclosure of detailed information about borrowings [line items] |  |  |  |  |  |  |  |  |  |  |
Interest rate on notes |  |  | 6.85% |  | 6.85% | 6.85% |  |  | 6.85% |  |
Total unsecured long term debt |  |  | $ 750 |  | $ 750 | $ 969.0 |  |  | $ 1,021.0 |  |
Notes 6.00 Percent Due 2042 |  |  |  |  |  |  |  |  |  |  |
Disclosure of detailed information about borrowings [line items] |  |  |  |  |  |  |  |  |  |  |
Interest rate on notes |  |  | 6.00% |  | 6.00% | 6.00% |  |  | 6.00% |  |
Total unsecured long term debt |  |  | $ 152 |  | $ 152 | $ 150.0 |  |  | $ 158.0 |  |
Notes 4.00 Percent Due 2047 |  |  |  |  |  |  |  |  |  |  |
Disclosure of detailed information about borrowings [line items] |  |  |  |  |  |  |  |  |  |  |
Interest rate on notes |  |  | 4.00% |  | 4.00% | 4.00% |  |  | 4.00% |  |
Total unsecured long term debt |  |  | $ 750 |  | $ 750 | $ 967.0 |  |  | $ 1,018.0 |  |
4.34% Series 5 Medium Term Notes, due 2046 |  |  |  |  |  |  |  |  |  |  |
Disclosure of detailed information about borrowings [line items] |  |  |  |  |  |  |  |  |  |  |
Interest rate on notes |  |  | 4.34% |  | 4.34% | 4.34% |  |  | 4.34% |  |
Total unsecured long term debt |  |  |  |  |  | $ 300.0 |  |  | $ 300.0 |  |

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

X
- Definition The interest rate on borrowings. [Refer: Borrowings] + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Name IFRS -Number 7 -IssueDate 2019-01-01 -Paragraph 7 -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IFRS&num=7&code=ifrs-tx-2019-en-r&anchor=para_7&doctype=Standard -URIDate 2019-03-27 + Details
Name: | ifrs-full_BorrowingsInterestRate
Namespace Prefix: | ifrs-full_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | instant

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

X
- Definition The amount of current lease liabilities. [Refer: Lease liabilities] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 16 -IssueDate 2019-01-01 -Paragraph 47 -Subparagraph b -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IFRS&num=16&code=ifrs-tx-2019-en-r&anchor=para_47_b&doctype=Standard -URIDate 2019-03-27 + Details
Name: | ifrs-full_CurrentLeaseLiabilities
Namespace Prefix: | ifrs-full_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition The current portion of non-current borrowings. [Refer: Borrowings] + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Name IAS -Number 1 -IssueDate 2019-01-01 -Paragraph 55 -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=1&code=ifrs-tx-2019-en-r&anchor=para_55&doctype=Standard -URIDate 2019-03-27 + Details
Name: | ifrs-full_CurrentPortionOfLongtermBorrowings
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_DisclosureOfDetailedInformationAboutBorrowingsLineItems
Namespace Prefix: | ifrs-full_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition The amount of interest recognised as a liability. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Name IAS -Number 1 -IssueDate 2019-01-01 -Paragraph 112 -Subparagraph c -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=1&code=ifrs-tx-2019-en-r&anchor=para_112_c&doctype=Standard -URIDate 2019-03-27 + Details
Name: | ifrs-full_InterestPayable
Namespace Prefix: | ifrs-full_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition The amount of liabilities related to the entity's leases. Lease is a contract, or part of a contract, that conveys the right to use an underlying asset for a period of time in exchange for consideration. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 16 -IssueDate 2019-01-01 -Paragraph 47 -Subparagraph b -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IFRS&num=16&code=ifrs-tx-2019-en-r&anchor=para_47_b&doctype=Standard -URIDate 2019-03-27 + Details
Name: | ifrs-full_LeaseLiabilities
Namespace Prefix: | ifrs-full_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition The non-current portion of non-current borrowings. [Refer: Borrowings] + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Name IAS -Number 1 -IssueDate 2019-01-01 -Paragraph 55 -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=1&code=ifrs-tx-2019-en-r&anchor=para_55&doctype=Standard -URIDate 2019-03-27 + Details
Name: | ifrs-full_LongtermBorrowings
Namespace Prefix: | ifrs-full_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition The amount of non-current lease liabilities. [Refer: Lease liabilities] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 16 -IssueDate 2019-01-01 -Paragraph 47 -Subparagraph b -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IFRS&num=16&code=ifrs-tx-2019-en-r&anchor=para_47_b&doctype=Standard -URIDate 2019-03-27 + Details
Name: | ifrs-full_NoncurrentLeaseLiabilities
Namespace Prefix: | ifrs-full_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition The amount of notes and debentures issued by the entity. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Name IAS -Number 1 -IssueDate 2019-01-01 -Paragraph 112 -Subparagraph c -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=1&code=ifrs-tx-2019-en-r&anchor=para_112_c&doctype=Standard -URIDate 2019-03-27 + Details
Name: | ifrs-full_NotesAndDebenturesIssued
Namespace Prefix: | ifrs-full_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition The cash outflow for repayments of non-current borrowings. [Refer: Borrowings] + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Name IAS -Number 7 -IssueDate 2019-01-01 -Paragraph 17 -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=7&code=ifrs-tx-2019-en-r&anchor=para_17&doctype=Standard -URIDate 2019-03-27 + Details
Name: | ifrs-full_RepaymentsOfNoncurrentBorrowings
Namespace Prefix: | ifrs-full_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition The amount of current borrowings. [Refer: Borrowings] + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Name IAS -Number 1 -IssueDate 2019-01-01 -Paragraph 55 -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=1&code=ifrs-tx-2019-en-r&anchor=para_55&doctype=Standard -URIDate 2019-03-27 + Details
Name: | ifrs-full_ShorttermBorrowings
Namespace Prefix: | ifrs-full_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Represents the amount of commercial paper that is authorised to be issued. + References No definition available. + Details
Name: | su_CommercialPaperIssuanceAuthorized
Namespace Prefix: | su_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Represents the issue term for commercial paper. + References No definition available. + Details
Name: | su_CommercialPaperTerm
Namespace Prefix: | su_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

X
- Definition The amount of current finance lease liabilities. + References No definition available. + Details
Name: | su_CurrentFinanceLeaseLiabilitiesIas17
Namespace Prefix: | su_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition The current portion of non-current borrowings excluding current finance leases and current lease liabilities. + References No definition available. + Details
Name: | su_CurrentPortionOfLongtermBorrowingsExcludingCurrentFinanceLeasesAndCurrentLeaseLiabilities
Namespace Prefix: | su_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Represents the issue price per instrument. + References No definition available. + Details
Name: | su_DebtInstrumentIssuePrice
Namespace Prefix: | su_
Data Type: | num:perShareItemType
Balance Type: | na
Period Type: | duration

X
- Definition Represents the amount of deferred financing costs. + References No definition available. + Details
Name: | su_DeferredFinancingCosts
Namespace Prefix: | su_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Represents the interest rate on finance lease. + References No definition available. + Details
Name: | su_FinanceLeaseInterestRate
Namespace Prefix: | su_
Data Type: | xbrli:pureItemType
Balance Type: | na
Period Type: | instant

X
- Definition The amount of finance lease liabilities. + References No definition available. + Details
Name: | su_FinanceLeaseLiabilitiesIas17
Namespace Prefix: | su_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Difference between the fair value of payments made and the carrying amount of debt which is extinguished prior to maturity. + References No definition available. + Details
Name: | su_GainLossOnExtinguishmentOfDebt
Namespace Prefix: | su_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Difference between the fair value of payments made and the carrying amount of debt which is extinguished prior to maturity, net of tax. + References No definition available. + Details
Name: | su_GainLossOnExtinguishmentOfDebtNetOfTax
Namespace Prefix: | su_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Effective interest rate for the funds borrowed under the debt agreement considering interest compounding and original issue discount or premium. + References No definition available. + Details
Name: | su_IfrsDebtInstrumentInterestRateEffectivePercentage
Namespace Prefix: | su_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | instant

X
- Definition Represents the interest rate on lease liabilities. + References No definition available. + Details
Name: | su_LeaseLiabilitiesInterestRate
Namespace Prefix: | su_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | instant

X
- Definition The amount of long-term borrowing, including current portion. + References No definition available. + Details
Name: | su_LongtermBorrowingsCurrentAndNoncurrent
Namespace Prefix: | su_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition The amount of long term debt before accrued charges and issuance costs. + References No definition available. + Details
Name: | su_LongtermBorrowingsGross
Namespace Prefix: | su_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition The original amount that was scheduled to mature when the loan was originated. + References No definition available. + Details
Name: | su_LongtermBorrowingsOriginalMaturityAmount
Namespace Prefix: | su_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Represents the revised coupon rate of the debt following a ratings downgrade by Moodys. + References No definition available. + Details
Name: | su_RevisedDebtCouponRateFollowingRatingsDowngrade
Namespace Prefix: | su_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | instant

X
- Definition Face amount of the subsidiary debt that was repurchased. + References No definition available. + Details
Name: | su_SubsidiaryDebtRepurchasedFaceValue
Namespace Prefix: | su_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

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_BorrowingsByNameAxis=su_IfrsCommercialPaperMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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

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

X
- Details
Name: | ifrs-full_BorrowingsByNameAxis=su_Notes7.75PercentDue2019Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_BorrowingsByNameAxis=su_Notes3.10PercentSeries5MediumTermDue2021Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_BorrowingsByNameAxis=su_Debentures9.25PercentDue2021Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_BorrowingsByNameAxis=su_Notes9.40PercentDue2021Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_BorrowingsByNameAxis=su_Notes4.50PercentDue2022Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_BorrowingsByNameAxis=su_Notes3.60PercentDue2024Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_BorrowingsByNameAxis=su_Notes3.00PercentSeries5MediumTermDue2026Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_BorrowingsByNameAxis=su_Debentures7.875PercentDue2026Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_BorrowingsByNameAxis=su_Notes8.20PercentDue2027Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_BorrowingsByNameAxis=su_Debentures7.00PercentDue2028Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_BorrowingsByNameAxis=su_Notes3.10PercentSeries6MediumTermDue2029Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_BorrowingsByNameAxis=su_Notes7.15PercentDue2032Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_BorrowingsByNameAxis=su_Notes5.35PercentDue2033Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_BorrowingsByNameAxis=su_Notes5.95PercentDue2034Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_BorrowingsByNameAxis=su_Notes5.95PercentDue2035Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_BorrowingsByNameAxis=su_Notes5.39PercentSeries4MediumTermDue2037Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_BorrowingsByNameAxis=su_Notes6.50PercentDue2038Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_BorrowingsByNameAxis=su_Notes6.80PercentDue2038Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_BorrowingsByNameAxis=su_Notes6.85PercentDue2039Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_BorrowingsByNameAxis=su_Notes6PercentDue2042Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_BorrowingsByNameAxis=su_Notes4.00PercentDue2047Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_BorrowingsByNameAxis=su_Notes4.34PercentSeries5MediumTermDue2046Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |