Leases (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Operating Lease, Liability, Leases Not Commenced	$ 81.0
Lessee, Operating Lease, Liability, Payments, Due Next Twelve Months	299.6
Operating Lease, Expense	$ 268.4	$ 290.7	$ 306.0
Minimum Remaining Lease Term	1 year
Maximum Remaining Lease Term	13 years
Short-term Lease, Cost	$ 7.9	6.4	8.1
Sublease Income	(26.4)	(23.8)	(21.1)
Lease, Cost	249.9	273.3	293.0
Operating Lease, Payments	299.5	320.9	347.6
Right-of-Use Asset Obtained in Exchange for Operating Lease Liability	$ 83.0	$ 93.0	$ 431.0
Operating Lease, Weighted Average Remaining Lease Term	7 years	8 years	8 years
Operating Lease, Weighted Average Discount Rate, Percent	3.63%	3.51%	3.45%
Lessee, Operating Lease, Liability, Payments, Due Year Two	$ 270.1
Lessee, Operating Lease, Liability, Payments, Due Year Three	249.8
Lessee, Operating Lease, Liability, Payments, Due Year Four	215.4
Lessee, Operating Lease, Liability, Payments, Due Year Five	170.9
Lessee, Operating Lease, Liability, Payments, Due after Year Five	458.4
Lessee, Operating Lease, Liability, Payments, Due	1,664.2
Lessee, Operating Lease, Liability, Undiscounted Excess Amount	194.8
Operating Lease, Liability	1,469.4
Operating Lease, Liability, Current	252.6	$ 235.9
Operating Lease, Liability, Noncurrent	$ 1,216.8	$ 1,380.1
Minimum Lease Term for Leases That Have Not Yet Commenced	1 year
Maximum Lease Term for Leases That Have Not Yet Commenced	12 years