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Long-Term Debt (Tables)
12 Months Ended
Dec. 31, 2020
Financial instruments [Abstract]  
Summary of Long Term Debt
December 31
2020
December 31
2019
$
$
Senior unsecured notes299.5 — 
Revolving credit facility 448.0 
Term loan309.1 308.5 
Notes payable68.8 88.7 
Software financing obligations3.4 15.7 
680.8 860.9 
Less current portion46.6 46.9 
Long-term portion634.2 814.0