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Right-Of-Use Assets (Details) $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2021 USD ($) site | Dec. 31, 2020 USD ($)
Right Of Use Asset Roll Forward [Roll Forward] |  |
Beginning balance | $ 101.0 | $ 104.1
Additions | 42.6 | 27.9
Additions through business combination (note 3) | 5.1 |
Depreciation | (32.0) | (30.3)
Write-down of assets and lease terminations | (0.3) | (1.1)
Foreign exchange and other | (2.6) | 0.4
Ending balance | 113.8 | 101.0
Reduction for tenant improvement allowances | $ 0.4 | 4.2
Number of sites | site | 1 |
Land |  |
Right Of Use Asset Roll Forward [Roll Forward] |  |
Beginning balance | $ 7.1 | 7.0
Additions | 0.1 | 0.7
Additions through business combination (note 3) | 4.3 |
Depreciation | (0.5) | (0.6)
Write-down of assets and lease terminations | 0.0 | 0.0
Foreign exchange and other | (0.3) | 0.0
Ending balance | 10.7 | 7.1
Buildings |  |
Right Of Use Asset Roll Forward [Roll Forward] |  |
Beginning balance | 91.7 | 94.7
Additions | 42.1 | 26.9
Additions through business combination (note 3) | 0.8 |
Depreciation | (31.0) | (29.2)
Write-down of assets and lease terminations | (0.3) | (1.1)
Foreign exchange and other | (2.3) | 0.4
Ending balance | 101.0 | 91.7
Other |  |
Right Of Use Asset Roll Forward [Roll Forward] |  |
Beginning balance | 2.2 | 2.4
Additions | 0.4 | 0.3
Additions through business combination (note 3) | 0.0 |
Depreciation | (0.5) | (0.5)
Write-down of assets and lease terminations | 0.0 | 0.0
Foreign exchange and other | 0.0 | 0.0
Ending balance | $ 2.1 | $ 2.2

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- Definition The amount of additions to right-of-use assets. [Refer: Right-of-use assets] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 16 -IssueDate 2021-01-01 -Paragraph 53 -Subparagraph h -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IFRS&num=16&code=ifrs-tx-2021-en-r&anchor=para_53_h&doctype=Standard -URIDate 2021-03-24 + Details
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- Definition The amount of assets that represent a lessee's right to use an underlying asset for the lease term. Underlying asset is an asset that is the subject of a lease, for which the right to use that asset has been provided by a lessor to a lessee. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 16 -IssueDate 2021-01-01 -Paragraph 53 -Subparagraph j -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IFRS&num=16&code=ifrs-tx-2021-en-r&anchor=para_53_j&doctype=Standard -URIDate 2021-03-24 + Details
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