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Significant partly-owned subsidiaries - Summarized Statements of Financial Position (Details) - CAD ($) $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2017 | Dec. 31, 2016
Disclosure of subsidiaries [line items] |  |
Current assets | $ 4,639 | $ 4,855
Non-current assets | 49,624 | 45,253
Total assets | 54,263 | 50,108
Current liabilities | 10,787 | 10,108
Non-current liabilities | 23,993 | 22,146
Total liabilities | 34,780 | 32,254
Total equity attributable to BCE shareholders | 19,160 | 17,540
Non-controlling interest | 323 | 314
CTV Specialty hedge |  |
Disclosure of subsidiaries [line items] |  |
Current assets | 328 | 293
Non-current assets | 1,013 | 1,013
Total assets | 1,341 | 1,306
Current liabilities | 153 | 130
Non-current liabilities | 184 | 195
Total liabilities | 337 | 325
Total equity attributable to BCE shareholders | 700 | 687
Non-controlling interest | $ 304 | $ 294
Proportion of ownership interests held by non-controlling interests | 29.90% | 29.90%
Net assets | $ 6 | $ 2

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