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Trade and Other Receivables (Tables) | 12 Months Ended
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Dec. 31, 2017
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Schedule of Trade and Other Receivables |
|  | December 31 |  |  | December 31 |
|  | 2017 $ |  |  | 2016 $ |
Trade receivables, net of allowance |  |  | 746.6 |  |  |  | 740.7 |
Holdbacks, current |  |  | 43.8 |  |  |  | 45.0 |
Other |  |  | 25.7 |  |  |  | 20.7 |
Trade and other receivables |  |  | 816.1 |  |  |  | 806.4 |
Schedule of Reconciliation of Changes to Allowance for Doubtful Account | The following table provides a reconciliation of changes to the Company’s allowance for doubtful accounts.
|  | December 31 2017 $ |  |  | December 31 2016 $ |
Balance, beginning of the year |  |  | 28.2 |  |  |  | 20.9 |
Provision for doubtful accounts |  |  | 11.6 |  |  |  | 17.0 |
Deductions |  |  | (8.7 | ) |  |  | (8.0 | )
Impact of foreign exchange |  |  | (2.0 | ) |  |  | (1.7 | )
Balance, end of the year |  |  | 29.1 |  |  |  | 28.2 |
Schedule of Gross Trade Receivables Aging Analysis | The aging analysis of gross trade receivables is as follows:
|  | Total |  |  | 1–30 |  |  | 31–60 |  |  | 61–90 |  |  | 91–120 |  |  | 121+ |
|  | $ |  |  | $ |  |  | $ |  |  | $ |  |  | $ |  |  | $ |
December 31, 2017 |  |  | 775.7 |  |  |  | 406.5 |  |  |  | 183.6 |  |  |  | 60.0 |  |  |  | 39.4 |  |  |  | 86.2 |

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