Leases (Breakdown of Lease Expense) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Leases [Abstract]
Operating lease cost	$ 250.8	$ 192.1	$ 23.0
Finance lease cost
Amortization of leased assets	12.5	11.3	10.2
Interest on lease liabilities	1.7	1.3	0.8
Short-term lease cost	12.6	17.0	12.2
Sublease income	(1.0)	(0.6)	(0.1)
Lease expense	$ 276.6	$ 221.1	$ 46.1