Credit losses (Details) $ in Millions	3 Months Ended
	Mar. 31, 2022 USD ($) country
Valuation Allowance [Line Items]
Number of Countries in which Entity Operates | country	100
Accounts Receivable, Allowance for Credit Loss [Roll Forward]
Allowance for doubtful accounts, beginning balance	$ 16.9
Provision for uncollectible accounts receivable	15.4
Other	3.4
Write-offs and recoveries	(0.6)
Foreign currency exchange effects	(0.1)
Allowance for doubtful accounts, ending balance	35.0
Uncollectible Receivables
Accounts Receivable, Allowance for Credit Loss [Roll Forward]
Provision for uncollectible accounts receivable	$ 16.7