XML 163 R133.htm IDEA: XBRL DOCUMENT
v3.21.2

Subsequent Events (Details) shares in Millions | Nov. 02, 2021 shares
--- | ---
Subsequent Events [Abstract] |
Normal course issuer bid, maximum common shares (in shares) | 146.5

X
- Definition Normal course issuer bid, maximum common shares + References No definition available. + Details
Name: | cve_NormalCourseIssuerBidMaximumCommonShares
Namespace Prefix: | cve_
Data Type: | xbrli:sharesItemType
Balance Type: | na
Period Type: | instant

X
- Definition Subsequent Events [Abstract] + References No definition available. + Details
Name: | cve_SubsequentEventsAbstract
Namespace Prefix: | cve_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration