Leases - Future Minimum Lease Commitments (Details) - USD ($) $ in Millions	Mar. 31, 2021	Dec. 31, 2020
Operating Leases
2021 (excluding the three months ended March 31, 2021)	$ 314.1
2022	410.3
2023	400.2
2024	383.7
2025	380.7
Thereafter	7,791.1
Total lease payments	9,680.1
Less: Imputed interest	(5,212.4)
Present value of future lease payments	4,467.7
Less: Current portion of lease obligations	(130.7)
Long-term portion of lease obligations	4,337.0
Finance Leases
2021 (excluding the three months ended March 31, 2021)	16.5
2022	21.6
2023	20.8
2024	16.7
2025	16.7
Thereafter	376.7
Total lease payments	469.0
Less: Imputed interest	(251.3)
Present value of future lease payments	217.7
Less: Current portion of lease obligations	(7.0)
Long-term portion of lease obligations	210.7
Financing Obligations
2021 (excluding the three months ended March 31, 2021)	277.7
2022	370.3
2023	370.4
2024	370.4
2025	370.5
Thereafter	9,094.5
Total lease payments	10,853.8
Less: Imputed interest	(6,730.1)
Present value of future lease payments	4,123.7
Less: Current portion of lease obligations	(36.7)	$ (36.0)
Long-term portion of lease obligations	$ 4,087.0	$ 4,096.4