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Other long-term liabilities (Details) $ in Millions, $ in Millions | Dec. 31, 2018 CAD ($) | Dec. 31, 2017 CAD ($) | Dec. 31, 2009 USD ($) agreement
--- | --- | --- | ---
Other long term liabilities |  |  |
Pensions and other post-retirement benefits | $ 1,420 | $ 1,369 |
Share-based compensation plans | 259 | 361 |
Partnership liability | 470 | 483 |
Deferred revenue | 46 | 49 |
Libya Exploration and Production Sharing Agreement (EPSA) signature bonus(1) | 83 | 77 |
Other | 68 | 73 |
Other long term liabilities | 2,346 | 2,412 |
Petro Canada |  |  |
Other long term liabilities |  |  |
Number of EPSA's agreement ratified | agreement |  |  | 6
Signature bonus | 85 | 79 | $ 500
Signature bonus current | $ 2 | $ 2 |

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- Definition The amount of liability representing income that has been received but is not yet earned. [Refer: Revenue] + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Name IAS -Number 1 -IssueDate 2018-01-01 -Paragraph 78 -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IAS&num=1&date=2018-03-01&anchor=para_78&doctype=Standard -URIDate 2018-03-16 + Details
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- Definition The amount of non-current liabilities that the entity does not separately disclose in the same statement or note. [Refer: Non-current liabilities] + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Name IAS -Number 1 -IssueDate 2018-01-01 -Paragraph 55 -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IAS&num=1&date=2018-03-01&anchor=para_55&doctype=Standard -URIDate 2018-03-16 + Details
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- Details
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