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Assets held for sale - Schedule of Assets and Liabilities Held For Sale (Details) - CAD ($) $ in Millions | Dec. 31, 2021 | Dec. 31, 2020 | Dec. 31, 2019
--- | --- | --- | ---
Disclosure of financial assets [line items] |  |  |
Trade and other receivables | $ 3,949 | $ 3,528 |
Contract costs | 894 | 764 | $ 783
Prepaid expenses | 254 | 209 |
Property, plant and equipment | 28,235 | 27,513 | 27,636
Intangible assets | 15,570 | 13,102 | $ 13,352
Other non-current assets | 1,306 | 1,001 |
Goodwill | 10,572 | 10,604 |
Total assets | 66,764 | 60,665 |
Trade payables and other liabilities | 4,455 | 3,935 |
Contract liabilities | 799 | 717 |
Deferred tax liabilities | 4,679 | 3,810 |
Other non-current liabilities | 1,003 | 1,145 |
Total liabilities | 43,823 | $ 39,336 |
Assets and liabilities classified as held for sale [member] |  |  |
Disclosure of financial assets [line items] |  |  |
Trade and other receivables | 29 |  |
Contract costs | 4 |  |
Prepaid expenses | 1 |  |
Property, plant and equipment | 2 |  |
Intangible assets | 1 |  |
Other non-current assets | 7 |  |
Goodwill | 6 |  |
Total assets | 50 |  |
Trade payables and other liabilities | 18 |  |
Contract liabilities | 7 |  |
Deferred tax liabilities | 5 |  |
Other non-current liabilities | 5 |  |
Total liabilities | 35 |  |
Total net assets | $ 15 |  |

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