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Contract costs (Tables) | 12 Months Ended
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Dec. 31, 2021
Revenue From Contract With Customer1 [Abstract] |
Contract costs | The table below provides a reconciliation of the contract costs balance.
FOR THE YEAR ENDED DECEMBER 31 | NOTE | 2021 | 2020
Opening balance, January 1 |  | 764 |  | 783 |
Incremental costs of obtaining a contract and contract fulfillment costs |  | 635 |  | 535 |
Amortization included in operating costs |  | (504) |  | (552) |
Acquisitions |  | 3 |  | — |
Reclassified to assets held for sale | 16 |  | (4) |  | — |
Discontinued operations | 37 |  | — |  | (2) |
Ending balance, December 31 |  | 894 |  | 764 |

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- Definition The disclosure of assets recognised from the costs to obtain or fulfil contracts with customers. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 15 -IssueDate 2021-01-01 -Paragraph 128 -Subparagraph a -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IFRS&num=15&code=ifrs-tx-2021-en-r&anchor=para_128_a&doctype=Standard -URIDate 2021-03-24 + Details
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