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Fair Value Measurements (Tables) | 12 Months Ended
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Dec. 31, 2020
Fair value measurement [Abstract] |
Summary of Fair Value Hierarchy for Assets | The following table summarizes the Company’s fair value hierarchy for those assets and liabilities measured and adjusted to fair value on a recurring basis at December 31, 2020:
|  | Carrying Amount | Level 1 | Level 2 | Level 3
| Notes | $ | $ | $ | $
Assets |  |  |  |  |
Investments held for self-insured liabilities | 15 | 174.9 |  | — |  | 174.9 |  | — |
Liabilities |  |  |  |  |
Interest rate swap | 20,25 | 6.9 |  | — |  | 6.9 |  | — |
Summary of Fair Value Hierarchy for Liabilities | The following table summarizes the Company’s fair value hierarchy for those liabilities that were not measured at fair value but are required to be disclosed at fair value on a recurring basis as at December 31, 2020:
|  | Carrying Amount | Quoted Prices in Active Markets for Identical Items (Level 1) | Significant Other Observable Inputs (Level 2) | Significant Unobservable Inputs (Level 3)
| Note | $ | $ | $ | $
Senior unsecured notes | 17 | 299.5 |  | — |  | 297.8 |  | — |
Notes payable | 17 | 68.8 |  | — |  | 69.5 |  | — |

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- Definition The disclosure of the fair value measurement of liabilities. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 13 -IssueDate 2020-01-01 -Paragraph 93 -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IFRS&num=13&code=ifrs-tx-2020-en-r&anchor=para_93&doctype=Standard -URIDate 2020-01-01 + Details
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