Contract with customer, asset and liability (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Revenue from Contract with Customer [Abstract]
Contract with Customer, Asset, before Allowance for Credit Loss	$ 777.9	$ 522.9	$ 502.2
change in contract asset	255.0	20.7
Contract with Customer, Liability	(447.7)	(353.9)	(356.4)
change in contract liability	(93.8)	2.5
Contract with Customer, Liability, Revenue Recognized	66.8	189.4
Contracts with Customers, Net Contract Asset (Liability)	330.2	169.0	$ 145.8
change in net contract asset	$ 161.2	$ 23.2