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Supplemental disclosures of cash flow information (Details) - USD ($)
$ in Millions
 3 Months Ended
Mar. 31, 2023
Mar. 31, 2022
Dec. 31, 2022
Dec. 31, 2021
Components and classification of cash, restricted cash and equivalents        
Cash and cash equivalents $ 294.6   $ 372.9  
Restricted cash classified as other assets 24.3   24.0  
Total 318.9 $ 308.4 $ 396.9 $ 327.1
Cash flows from operating activities:        
Cash paid for income taxes, net 13.6 47.6    
Cash paid for interest, net, excluding financing leases 79.5 68.2    
Cash paid for interest on finance leases 1.2 1.3    
Cash paid under operating leases 10.4 11.5    
Cash flows from financing activities:        
Cash paid under finance leases $ 1.2 $ 1.2