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Capitalized contract costs (Tables)
 12 Months Ended
Dec. 31, 2021
Revenue from Contract with Customer [Abstract]  
Schedule of Deferred Commissions, Costs to Fulfill a Contract, and Amortization Expense
Deferred commissions were as follows:
As of December 31,20212020
Deferred commissions$6.7 $8.7 
Amortization expense related to deferred commissions was as follows:
Year ended December 31,202120202019
Deferred commissions - amortization expense(i)
$2.9 $3.2 $3.1 
(i)Reported in selling, general and administrative expense in the company’s consolidated statements of income (loss)
Costs to fulfill a contract were as follows:
As of December 31,20212020
Costs to fulfill a contract$56.2 $74.4 
Amortization expense related to costs to fulfill a contract was as follows:
Year ended December 31,202120202019
Costs to fulfill a contract - amortization expense$27.9 $27.5 $24.2