Leases (Breakdown of Lease Expense) (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2024	Jun. 30, 2023	Jun. 30, 2024	Jun. 30, 2023
Leases [Abstract]
Operating lease cost	$ 61.1	$ 59.1	$ 121.9	$ 72.2
Finance lease cost
Amortization of leased assets	3.0	0.6	5.7	5.9
Interest on lease liabilities	0.5	0.2	0.9	0.6
Short-term lease cost	4.6	4.2	10.0	7.7
Sublease income	(0.2)	0.0	(0.4)	(0.1)
Lease expense	$ 69.0	$ 64.1	$ 138.1	$ 86.3