Leases (Maturities of Operating and Financing Lease Liabilities) (Details) - USD ($) $ in Millions	Mar. 31, 2024	Dec. 31, 2023
Operating leases
2024 (remainder of year)	$ 218.8
2025	255.8
2026	238.7
2027	227.8
2028	219.2
2029	211.4
Thereafter	1,488.1
Total payments	2,859.8
Less: present value discount	(798.9)
Present value of lease payments	2,060.9	$ 1,803.9
Current portion	178.2
Long-term portion	1,882.7	1,652.1
Finance leases
2024 (remainder of year)	8.2
2025	10.1
2026	7.9
2027	7.0
2028	4.4
2029	3.1
Thereafter	27.1
Total payments	67.8
Less: present value discount	(15.5)
Present value of lease payments	52.3	$ 58.0
Current portion	8.9
Long-term portion	$ 43.4