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intangible assets and goodwill - Intangible assets with indefinite lives and goodwill - spectrum licences and impairment testing (Details) - CAD ($) $ in Millions | 12 Months Ended |  |
--- | --- | --- | ---
Dec. 31, 2018 | Dec. 31, 2017 | Jan. 01, 2017
Intangible assets and goodwill |  |  |
Intangible assets with indefinite lives | $ 8,694 | $ 8,693 |
Goodwill | 4,733 | 4,236 | $ 3,787
Total | $ 13,427 | $ 12,929 |
Significant unobservable inputs (Level 3) |  |  |
Intangible assets and goodwill |  |  |
Period over which management has projected cash flows | 3 years |  |
Discount rates applied to cash flow projections | 7.00% | 7.00% |
Growth rates applied to cash flow projections | 2.00% | 2.25% |
Wireless |  |  |
Intangible assets and goodwill |  |  |
Intangible assets with indefinite lives | $ 8,694 | $ 8,693 |
Goodwill | 2,861 | 2,860 |
Total | 11,555 | 11,553 |
Wireline |  |  |
Intangible assets and goodwill |  |  |
Goodwill | 1,872 | 1,376 |
Total | $ 1,872 | $ 1,376 |
Spectrum licences |  |  |
Intangible assets and goodwill |  |  |
Renewal of spectrum license ( in years) | 20 years |  |

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