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Operating costs (Details) - CAD ($) $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2020 | Dec. 31, 2019
Labour costs |  |
Wages, salaries and related taxes and benefits | $ (4,108) | $ (4,281)
Post-employment benefit plans service cost (net of capitalized amounts) | (269) | (246)
Other labour costs | (975) | (1,004)
Less: |  |
Capitalized labour | 1,007 | 1,028
Employee Benefits Expense, Excluding Termination | (4,345) | (4,503)
Cost of revenues | (6,967) | (7,356)
Other operating costs | (1,964) | (1,928)
Total operating costs | (13,276) | (13,787)
Research and development expense | $ 47 | $ 109

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- Definition Employee Benefits Expense, Excluding Termination + References No definition available. + Details
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- Definition The amount of costs relating to expenses directly or indirectly attributed to the goods or services sold, which may include, but are not limited to, costs previously included in the measurement of inventory that has now been sold, unallocated production overheads and abnormal amounts of production costs of inventories. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 1 -IssueDate 2020-01-01 -Paragraph 99 -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=1&code=ifrs-tx-2020-en-r&anchor=para_99&doctype=Standard -URIDate 2020-01-01 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 1 -IssueDate 2020-01-01 -Paragraph 103 -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=1&code=ifrs-tx-2020-en-r&anchor=para_103&doctype=Standard -URIDate 2020-01-01 + Details
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