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Segmented information - Segmented Information (Details) $ in Millions | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jun. 30, 2018 CAD ($) | Jun. 30, 2017 CAD ($) | Jun. 30, 2018 CAD ($) segment | Jun. 30, 2017 CAD ($)
Operating Segments [Abstract] |  |  |  |
Number of operating segments | segment |  |  | 3 |
Disclosure of operating segments [line items] |  |  |  |
Operating revenues | $ 5,786 | $ 5,688 | $ 11,376 | $ 11,024
Operating costs | (3,356) | (3,306) | (6,692) | (6,476)
Segment profit | 2,430 | 2,382 | 4,684 | 4,548
Severance, acquisition and other costs | (24) | (36) | (24) | (120)
Depreciation and amortization | (1,008) | (977) | (2,000) | (1,886)
Interest expense | (246) | (238) | (486) | (472)
Interest on post-employment benefit obligations | (17) | (18) | (34) | (36)
Other income (expense) | (88) | (1) | (149) | 16
Income taxes | (292) | (298) | (527) | (548)
Net earnings | 755 | 814 | 1,464 | 1,502
BELL WIRELESS |  |  |  |
Disclosure of operating segments [line items] |  |  |  |
Operating revenues | 2,032 | 1,938 | 3,966 | 3,694
Severance, acquisition and other costs | (3) | 0 | (6) | (5)
Depreciation and amortization | (165) | (143) | (325) | (281)
BELL WIRELINE |  |  |  |
Disclosure of operating segments [line items] |  |  |  |
Operating revenues | 3,077 | 3,067 | 6,102 | 5,995
Severance, acquisition and other costs | (13) | (35) | (8) | (102)
Depreciation and amortization | (803) | (796) | (1,598) | (1,532)
BELL MEDIA |  |  |  |
Disclosure of operating segments [line items] |  |  |  |
Operating revenues | 677 | 683 | 1,308 | 1,335
Severance, acquisition and other costs | (8) | (1) | (10) | (13)
Depreciation and amortization | (40) | (38) | (77) | (73)
Operating segments | BELL WIRELESS |  |  |  |
Disclosure of operating segments [line items] |  |  |  |
Operating revenues | 2,046 | 1,949 | 3,992 | 3,716
Operating costs | (1,142) | (1,098) | (2,266) | (2,096)
Segment profit | 904 | 851 | 1,726 | 1,620
Operating segments | BELL WIRELINE |  |  |  |
Disclosure of operating segments [line items] |  |  |  |
Operating revenues | 3,135 | 3,117 | 6,219 | 6,094
Operating costs | (1,814) | (1,810) | (3,596) | (3,524)
Segment profit | 1,321 | 1,307 | 2,623 | 2,570
Operating segments | BELL MEDIA |  |  |  |
Disclosure of operating segments [line items] |  |  |  |
Operating revenues | 791 | 796 | 1,540 | 1,547
Operating costs | (586) | (572) | (1,205) | (1,189)
Segment profit | 205 | 224 | 335 | 358
Intersegment eliminations |  |  |  |
Disclosure of operating segments [line items] |  |  |  |
Operating revenues | (186) | (174) | (375) | (333)
Operating costs | 186 | 174 | 375 | 333
Intersegment eliminations | BELL WIRELESS |  |  |  |
Disclosure of operating segments [line items] |  |  |  |
Operating revenues | 14 | 11 | 26 | 22
Intersegment eliminations | BELL WIRELINE |  |  |  |
Disclosure of operating segments [line items] |  |  |  |
Operating revenues | 58 | 50 | 117 | 99
Intersegment eliminations | BELL MEDIA |  |  |  |
Disclosure of operating segments [line items] |  |  |  |
Operating revenues | $ 114 | $ 113 | $ 232 | $ 212

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