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Operating costs (Tables) | 12 Months Ended
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Dec. 31, 2017
Analysis of income and expense [abstract] |
Disclosure of operating costs |
FOR THE YEAR ENDED DECEMBER 31 | NOTE | 2017 |  | 2016 |
Labour costs |  |  |
| Wages, salaries and related taxes and benefits |  | (4,158 | ) | (4,016 | )
| Post-employment benefit plans service cost (net of capitalized amounts) | 22 | (242 | ) | (224 | )
| Other labour costs (1) |  | (1,056 | ) | (1,036 | )
Less: |  |  |
| Capitalized labour |  | 1,043 |  | 967 |
Total labour costs |  | (4,413 | ) | (4,309 | )
Cost of revenues (2) |  | (7,056 | ) | (6,705 | )
Other operating costs (3) |  | (2,072 | ) | (1,917 | )
Total operating costs |  | (13,541 | ) | (12,931 | )
(1) | Other labour costs include contractor and outsourcing costs.
(2) | Cost of revenues includes costs of wireless devices and other equipment sold, network and content costs, and payments to other carriers.
(3) | Other operating costs include marketing, advertising and sales commission costs, bad debt expense, taxes other than income taxes, IT costs, professional service fees and rent.

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