XML 155 R129.htm IDEA: XBRL DOCUMENT
v3.20.4

COMMITMENTS, CONTINGENCIES AND GUARANTEES - Contingencies (Details) $ in Millions | Dec. 31, 2020 CAD ($)
--- | ---
COMMITMENTS, CONTINGENCIES AND GUARANTEES |
Maximum potential amount payable under indemnification agreements | $ 125

X
- Definition NA + References No definition available. + Details
Name: | su_CommitmentsContingenciesAndGuaranteesAbstract
Namespace Prefix: | su_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition The maximum potential amount payable under indemnification agreements. + References No definition available. + Details
Name: | su_MaximumPotentialAmountPayableUnderIndemnificationAgreements
Namespace Prefix: | su_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant