Supplemental cash flow information (Details) - USD ($) $ in Millions	9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Dec. 31, 2022	Dec. 31, 2021
Condensed Cash Flow Statements, Captions [Line Items]
Interest	$ 161.2	$ 88.7
Income taxes, net	74.5	101.6
Financing Leases	61.5	43.7
Restricted cash	387.0		$ 438.5
Cash and cash equivalents	933.5		972.0
Total, cash, cash equivalents, and restricted cash in the condensed consolidated statements of cash flows	1,320.5	$ 1,348.9	1,410.5	$ 1,086.7
Cash Held From Customers
Condensed Cash Flow Statements, Captions [Line Items]
Restricted cash	184.3		229.3
Deposits liability
Condensed Cash Flow Statements, Captions [Line Items]
Restricted cash	160.7		156.3
Revolving Credit Facility
Condensed Cash Flow Statements, Captions [Line Items]
Restricted cash	$ 40.6		$ 40.7