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Long-term debt - Schedule of Total Leverage Ratios (Details)
Jun. 11, 2020
December 31, 2021  
Debt Instrument [Line Items]  
Maximum leverage ratio 5.50
March 31, 2022  
Debt Instrument [Line Items]  
Maximum leverage ratio 5.25
June 30, 2022  
Debt Instrument [Line Items]  
Maximum leverage ratio 5.00
September 30, 2022  
Debt Instrument [Line Items]  
Maximum leverage ratio 4.75
Thereafter  
Debt Instrument [Line Items]  
Maximum leverage ratio 4.50