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Supplemental cash flow information (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023	Dec. 31, 2023	Dec. 31, 2022
Condensed Cash Flow Statements, Captions [Line Items]
Interest	$ 68.0	$ 59.1
Income taxes, net	28.2	23.3
Financing Leases	19.5	20.7
Restricted cash	557.9		$ 507.0
Cash and cash equivalents	1,122.7		1,176.6
Total, cash, cash equivalents, and restricted cash in the condensed consolidated statements of cash flows	1,680.6	$ 1,218.4	1,683.6	$ 1,410.5
Cash Held From Customers
Condensed Cash Flow Statements, Captions [Line Items]
Restricted cash	340.6		298.7
Deposits liability
Condensed Cash Flow Statements, Captions [Line Items]
Restricted cash	172.6		167.8
Revolving Credit Facility
Condensed Cash Flow Statements, Captions [Line Items]
Restricted cash	$ 43.1		$ 40.9