Leases (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020
Lease Cost [Abstract]
Operating lease cost	$ 279.6	$ 303.6
Variable lease cost	25.7	28.5
Short-term lease cost	2.7	4.3
Sublease income	(3.8)	(0.9)
Operating leases, Total lease cost	304.2	335.5
Finance leases, Depreciation of ROU assets	52.6	50.2
Finance leases, Interest	4.9	5.3
Finance leases, Total lease cost	57.5	55.5
Total lease cost	361.7	391.0
Maturities of Lease Liabilities [Abstract]
Operating Leases Payments, 2022	259.0
Operating Leases Payments, 2023	198.5
Operating Leases Payments, 2024	170.5
Operating Leases Payments, 2025	135.2
Operating Leases Payments, 2026	113.3
Operating Leases Payments, Thereafter	600.2
Operating Leases Payments, Total lease payments	1,476.7
Operating Leases Payments, Less: Imputed interest	299.5
Operating Leases Payments, Present value of lease liability	1,177.2	1,384.5
Finance Leases Payments, 2022	51.0
Finance Leases Payments, 2023	38.7
Finance Leases Payments, 2024	27.2
Finance Leases Payments, 2025	16.1
Finance Leases Payments, 2026	3.7
Finance Leases Payments, Thereafter	2.2
Finance Leases Payments, Total lease payments	138.9
Finance Leases Payments, Less: Imputed interest	5.5
Finance Leases Payments, Present value of lease liability	133.4
Balance Sheet Classification and Weighted Average Remaining Lease Term and Weighted Average Discount Rate Related to Operating Leases [Abstract]
Operating Lease Right-Of-Use Assets	$ 1,202.9	$ 1,223.4
Operating lease liability, current, balance sheet classification	Other current liabilities	Other current liabilities
Operating lease liability, current	$ 225.1	$ 270.5
Long-Term Liability - Operating Leases	952.1	1,114.0
Operating lease liability, total	$ 1,177.2	$ 1,384.5
Operating leases, weighted average remaining lease term	7 years 6 months	7 years 10 months 24 days
Operating leases, weighted average discount rate	3.20%	3.70%
Property and Equipment and Finance Leases [Abstract]
Property and equipment - owned	$ 1,805.5	$ 1,427.7
Equipment under finance leases	352.3	314.2
Property and Equipment, before accumulated depreciation	2,157.8	1,741.9
Property and Equipment, accumulated depreciation	(1,165.7)	(1,156.7)
Property and Equipment, net of accumulated depreciation	$ 992.1	$ 585.2
Finance lease liability, current, balance sheet classification	Other current liabilities
Finance lease liability, noncurrent, balance sheet classification	Long-Term Liabilities
Finance leases, weighted average remaining lease term	3 years 1 month 6 days	3 years
Finance leases, weighted average discount rate	4.30%	4.20%