Leases (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019	Jan. 01, 2019
Operating Lease, Liability, Leases Not Commenced	$ 13.0
Lessee, Operating Lease, Liability, Payments, Due Next Twelve Months	320.5
Operating Lease, Expense	$ 306.0	$ 318.5	$ 325.2
Minimum Remaining Lease Term	1 year
Maximum Remaining Lease Term	15 years
Short-term Lease, Cost	$ 8.1	10.6	13.8
Sublease Income	(21.1)	(15.8)	(12.9)
Lease, Cost	293.0	313.3	326.1
Operating Lease, Payments	347.6	335.7	334.1
Right-of-Use Asset Obtained in Exchange for Operating Lease Liability	$ 431.0	$ 274.4	$ 422.8
Operating Lease, Weighted Average Remaining Lease Term	8 years	8 years	8 years
Operating Lease, Weighted Average Discount Rate, Percent	3.45%	4.00%	4.26%
Lessee, Operating Lease, Liability, Payments, Due Year Two	$ 269.0
Lessee, Operating Lease, Liability, Payments, Due Year Three	269.1
Lessee, Operating Lease, Liability, Payments, Due Year Four	247.7
Lessee, Operating Lease, Liability, Payments, Due Year Five	231.7
Lessee, Operating Lease, Liability, Payments, Due after Year Five	774.5
Lessee, Operating Lease, Liability, Payments, Due	2,112.5
Lessee, Operating Lease, Liability, Undiscounted Excess Amount	270.7
Operating Lease, Liability	1,841.8			$ 1,544.4
Operating Lease, Liability, Current	265.8	$ 268.5
Operating Lease, Liability, Noncurrent	$ 1,576.0	$ 1,441.0
Minimum Lease Term for Leases That Have Not Yet Commenced	1 year
Maximum Lease Term for Leases That Have Not Yet Commenced	10 years