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Intangible assets (Details) - CAD ($) $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2017 | Dec. 31, 2016
Reconciliation of changes in intangible assets and goodwill [abstract] |  |
Beginning balance | $ (11,998) | $ (11,176)
Ending balance | (13,305) | (11,998)
COST |  |
Reconciliation of changes in intangible assets and goodwill [abstract] |  |
Beginning balance | (17,995) | (16,608)
Additions | 1,391 | 1,423
Acquired through business combinations | 1,387 | 301
Transfers | 406 | 615
Retirements and disposals | (96) | (72)
Business dispositions |  | (4)
Impairment losses recognized in earnings | (82) | (8)
Amortization included in operating costs | 950 | 868
Ending balance | (20,051) | (17,995)
ACCUMULATED AMORTIZATION |  |
Reconciliation of changes in intangible assets and goodwill [abstract] |  |
Beginning balance | 5,997 | 5,432
Retirements and disposals | 73 | 69
Amortization included in operating costs | 813 | 631
Other | 9 | 3
Ending balance | 6,746 | 5,997
BRANDS |  |
Reconciliation of changes in intangible assets and goodwill [abstract] |  |
Beginning balance | (2,333) | (2,333)
Ending balance | (2,443) | (2,333)
BRANDS | COST |  |
Reconciliation of changes in intangible assets and goodwill [abstract] |  |
Beginning balance | (2,333) | (2,333)
Additions | 0 | 0
Acquired through business combinations | 110 | 0
Transfers | 0 | 0
Retirements and disposals | 0 | 0
Business dispositions |  | 0
Impairment losses recognized in earnings | 0 | 0
Amortization included in operating costs | 0 | 0
Ending balance | (2,443) | (2,333)
BRANDS | ACCUMULATED AMORTIZATION |  |
Reconciliation of changes in intangible assets and goodwill [abstract] |  |
Beginning balance | 0 | 0
Retirements and disposals | 0 | 0
Amortization included in operating costs | 0 | 0
Other | 0 | 0
Ending balance | 0 | 0
SPECTRUM AND OTHER LICENCES |  |
Reconciliation of changes in intangible assets and goodwill [abstract] |  |
Beginning balance | (3,288) | (3,267)
Ending balance | (3,534) | (3,288)
SPECTRUM AND OTHER LICENCES | COST |  |
Reconciliation of changes in intangible assets and goodwill [abstract] |  |
Beginning balance | (3,288) | (3,267)
Additions | 0 | 21
Acquired through business combinations | 246 | 0
Transfers | 0 | 0
Retirements and disposals | 0 | 0
Business dispositions |  | 0
Impairment losses recognized in earnings | 0 | 0
Amortization included in operating costs | 0 | 0
Ending balance | (3,534) | (3,288)
SPECTRUM AND OTHER LICENCES | ACCUMULATED AMORTIZATION |  |
Reconciliation of changes in intangible assets and goodwill [abstract] |  |
Beginning balance | 0 | 0
Retirements and disposals | 0 | 0
Amortization included in operating costs | 0 | 0
Other | 0 | 0
Ending balance | 0 | 0
BROADCAST LICENCES |  |
Reconciliation of changes in intangible assets and goodwill [abstract] |  |
Beginning balance | (2,322) | (2,334)
Ending balance | (2,251) | (2,322)
BROADCAST LICENCES | COST |  |
Reconciliation of changes in intangible assets and goodwill [abstract] |  |
Beginning balance | (2,322) | (2,334)
Additions | 0 | 0
Acquired through business combinations | 0 | 0
Transfers | (1) | 0
Retirements and disposals | 0 | 0
Business dispositions |  | (4)
Impairment losses recognized in earnings | (70) | (8)
Amortization included in operating costs | 0 | 0
Ending balance | (2,251) | (2,322)
BROADCAST LICENCES | ACCUMULATED AMORTIZATION |  |
Reconciliation of changes in intangible assets and goodwill [abstract] |  |
Beginning balance | 0 | 0
Retirements and disposals | 0 | 0
Amortization included in operating costs | 0 | 0
Other | 0 | 0
Ending balance | 0 | 0
TOTAL |  |
Reconciliation of changes in intangible assets and goodwill [abstract] |  |
Beginning balance | (7,943) | (7,934)
Ending balance | (8,228) | (7,943)
TOTAL | COST |  |
Reconciliation of changes in intangible assets and goodwill [abstract] |  |
Beginning balance | (7,943) | (7,934)
Additions | 0 | 21
Acquired through business combinations | 356 | 0
Transfers | (1) | 0
Retirements and disposals | 0 | 0
Business dispositions |  | (4)
Impairment losses recognized in earnings | (70) | (8)
Amortization included in operating costs | 0 | 0
Ending balance | (8,228) | (7,943)
TOTAL | ACCUMULATED AMORTIZATION |  |
Reconciliation of changes in intangible assets and goodwill [abstract] |  |
Beginning balance | 0 | 0
Retirements and disposals | 0 | 0
Amortization included in operating costs | 0 | 0
Other | 0 | 0
Ending balance | 0 | 0
SOFTWARE |  |
Reconciliation of changes in intangible assets and goodwill [abstract] |  |
Beginning balance | (2,545) | (2,082)
Ending balance | (2,713) | (2,545)
SOFTWARE | COST |  |
Reconciliation of changes in intangible assets and goodwill [abstract] |  |
Beginning balance | (7,861) | (6,906)
Additions | 344 | 412
Acquired through business combinations | 98 | 0
Transfers | 407 | 615
Retirements and disposals | (21) | (72)
Business dispositions |  | 0
Impairment losses recognized in earnings | 0 | 0
Amortization included in operating costs | 0 | 0
Ending balance | (8,689) | (7,861)
SOFTWARE | ACCUMULATED AMORTIZATION |  |
Reconciliation of changes in intangible assets and goodwill [abstract] |  |
Beginning balance | 5,316 | 4,824
Retirements and disposals | 21 | 69
Amortization included in operating costs | 672 | 558
Other | 9 | 3
Ending balance | 5,976 | 5,316
CUSTOMER RELATIONSHIPS |  |
Reconciliation of changes in intangible assets and goodwill [abstract] |  |
Beginning balance | (646) | (400)
Ending balance | (1,385) | (646)
CUSTOMER RELATIONSHIPS | COST |  |
Reconciliation of changes in intangible assets and goodwill [abstract] |  |
Beginning balance | (1,159) | (866)
Additions | 31 | 0
Acquired through business combinations | 830 | 293
Transfers | 0 | 0
Retirements and disposals | (20) | 0
Business dispositions |  | 0
Impairment losses recognized in earnings | 0 | 0
Amortization included in operating costs | 0 | 0
Ending balance | (2,000) | (1,159)
CUSTOMER RELATIONSHIPS | ACCUMULATED AMORTIZATION |  |
Reconciliation of changes in intangible assets and goodwill [abstract] |  |
Beginning balance | 513 | 466
Retirements and disposals | 0 | 0
Amortization included in operating costs | 102 | 47
Other | 0 | 0
Ending balance | 615 | 513
PROGRAM AND FEATURE FILM RIGHTS |  |
Reconciliation of changes in intangible assets and goodwill [abstract] |  |
Beginning balance | (682) | (577)
Ending balance | (741) | (682)
PROGRAM AND FEATURE FILM RIGHTS | COST |  |
Reconciliation of changes in intangible assets and goodwill [abstract] |  |
Beginning balance | (682) | (577)
Additions | 1,009 | 973
Acquired through business combinations | 0 | 0
Transfers | 0 | 0
Retirements and disposals | 0 | 0
Business dispositions |  | 0
Impairment losses recognized in earnings | 0 | 0
Amortization included in operating costs | 950 | 868
Ending balance | (741) | (682)
PROGRAM AND FEATURE FILM RIGHTS | ACCUMULATED AMORTIZATION |  |
Reconciliation of changes in intangible assets and goodwill [abstract] |  |
Beginning balance | 0 | 0
Retirements and disposals | 0 | 0
Amortization included in operating costs | 0 | 0
Other | 0 | 0
Ending balance | 0 | 0
OTHER |  |
Reconciliation of changes in intangible assets and goodwill [abstract] |  |
Beginning balance | (182) | (183)
Ending balance | (238) | (182)
OTHER | COST |  |
Reconciliation of changes in intangible assets and goodwill [abstract] |  |
Beginning balance | (350) | (325)
Additions | 7 | 17
Acquired through business combinations | 103 | 8
Transfers | 0 | 0
Retirements and disposals | (55) | 0
Business dispositions |  | 0
Impairment losses recognized in earnings | (12) | 0
Amortization included in operating costs | 0 | 0
Ending balance | (393) | (350)
OTHER | ACCUMULATED AMORTIZATION |  |
Reconciliation of changes in intangible assets and goodwill [abstract] |  |
Beginning balance | 168 | 142
Retirements and disposals | 52 | 0
Amortization included in operating costs | 39 | 26
Other | 0 | 0
Ending balance | 155 | 168
TOTAL |  |
Reconciliation of changes in intangible assets and goodwill [abstract] |  |
Beginning balance | (4,055) | (3,242)
Ending balance | (5,077) | (4,055)
TOTAL | COST |  |
Reconciliation of changes in intangible assets and goodwill [abstract] |  |
Beginning balance | (10,052) | (8,674)
Additions | 1,391 | 1,402
Acquired through business combinations | 1,031 | 301
Transfers | 407 | 615
Retirements and disposals | (96) | (72)
Business dispositions |  | 0
Impairment losses recognized in earnings | (12) | 0
Amortization included in operating costs | 950 | 868
Ending balance | (11,823) | (10,052)
TOTAL | ACCUMULATED AMORTIZATION |  |
Reconciliation of changes in intangible assets and goodwill [abstract] |  |
Beginning balance | 5,997 | 5,432
Retirements and disposals | 73 | 69
Amortization included in operating costs | 813 | 631
Other | 9 | 3
Ending balance | $ 6,746 | $ 5,997

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