Leases - Net operating lease cost (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2025	Sep. 30, 2024	Sep. 30, 2025	Sep. 30, 2024
Lease Cost
Operating lease cost	$ 71.3	$ 67.7	$ 211.2	$ 201.1
Sublease income	(4.3)	(4.4)	(13.3)	(12.0)
Total lease cost	$ 67.0	$ 63.3	$ 197.9	$ 189.1