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Adoption of IFRS 15 - Consolidated Statements of Cash Flows (Details) - CAD ($) $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2018 | Dec. 31, 2017
Disclosure of initial application of standards or interpretations [line items] |  |
Net earnings | $ 2,973 | $ 3,050
Depreciation and amortization | 4,014 | 3,844
Income taxes | 995 | 1,069
Net change in operating assets and liabilities | 381 | 376
Cash flows from operating activities | $ 7,384 | 7,358
IFRS 15 | 2017 as previously reported |  |
Disclosure of initial application of standards or interpretations [line items] |  |
Net earnings |  | 2,970
Depreciation and amortization |  | 3,850
Income taxes |  | 1,039
Net change in operating assets and liabilities |  | 480
Cash flows from operating activities |  | 7,358
IFRS 15 | IFRS 15 impacts |  |
Disclosure of initial application of standards or interpretations [line items] |  |
Net earnings |  | 80
Depreciation and amortization |  | (6)
Income taxes |  | 30
Net change in operating assets and liabilities |  | (104)
Cash flows from operating activities |  | $ 0

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