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Segmented information - Segmented Information (Details) $ in Millions | 12 Months Ended |
--- | --- | ---
Dec. 31, 2018 CAD ($) segment | Dec. 31, 2017 CAD ($) | Jan. 01, 2017 CAD ($)
Operating Segments [Abstract] |  |  |
Number of operating segments | segment | 3 |  |
Disclosure of operating segments [line items] |  |  |
Total operating revenues | $ 23,468 | $ 22,757 |
Operating costs | (13,933) | (13,475) |
Segment profit | 9,535 | 9,282 |
Severance, acquisition and other costs | (136) | (190) |
Depreciation and amortization | (4,014) | (3,844) |
Finance costs |  |  |
Interest expense | (1,000) | (955) |
Interest on post-employment benefit obligations | (69) | (72) |
Other expense | (348) | (102) |
Income taxes | (995) | (1,069) |
Net earnings (losses) | 2,973 | 3,050 |
Goodwill | 10,658 | 10,428 | $ 8,958
Indefinite-life intangible assets | 8,107 | 8,228 |
Capital expenditures | 3,971 | 4,034 |
BELL WIRELESS |  |  |
Disclosure of operating segments [line items] |  |  |
Total operating revenues | 8,372 | 7,881 |
Finance costs |  |  |
Goodwill | 3,048 | 3,032 |
Indefinite-life intangible assets | 3,948 | 3,891 |
Capital expenditures | 656 | 731 |
BELL WIRELINE |  |  |
Disclosure of operating segments [line items] |  |  |
Total operating revenues | 12,419 | 12,200 |
Finance costs |  |  |
Goodwill | 4,679 | 4,497 |
Indefinite-life intangible assets | 1,692 | 1,692 |
Capital expenditures | 3,201 | 3,174 |
BELL MEDIA |  |  |
Disclosure of operating segments [line items] |  |  |
Total operating revenues | 2,677 | 2,676 |
Finance costs |  |  |
Goodwill | 2,931 | 2,899 |
Indefinite-life intangible assets | 2,467 | 2,645 |
Capital expenditures | 114 | 129 |
Intersegment eliminations |  |  |
Disclosure of operating segments [line items] |  |  |
Total operating revenues | (737) | (673) |
Operating costs | 737 | 673 |
Intersegment eliminations | BELL WIRELESS |  |  |
Disclosure of operating segments [line items] |  |  |
Total operating revenues | 50 | 45 |
Intersegment eliminations | BELL WIRELINE |  |  |
Disclosure of operating segments [line items] |  |  |
Total operating revenues | 243 | 200 |
Intersegment eliminations | BELL MEDIA |  |  |
Disclosure of operating segments [line items] |  |  |
Total operating revenues | 444 | 428 |
Operating segments | BELL WIRELESS |  |  |
Disclosure of operating segments [line items] |  |  |
Total operating revenues | 8,422 | 7,926 |
Operating costs | (4,856) | (4,550) |
Segment profit | 3,566 | 3,376 |
Operating segments | BELL WIRELINE |  |  |
Disclosure of operating segments [line items] |  |  |
Total operating revenues | 12,662 | 12,400 |
Operating costs | (7,386) | (7,210) |
Segment profit | 5,276 | 5,190 |
Operating segments | BELL MEDIA |  |  |
Disclosure of operating segments [line items] |  |  |
Total operating revenues | 3,121 | 3,104 |
Operating costs | (2,428) | (2,388) |
Segment profit | $ 693 | $ 716 |

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