Leases - Future Minimum Lease Commitments (Details) - USD ($) $ in Millions	Mar. 31, 2020	Dec. 31, 2019
Operating Leases
2020 (excluding the three months ended March 31, 2020)	$ 316.4
2021	404.3
2022	401.2
2023	398.1
2024	381.6
Thereafter	8,156.4
Total lease payments	10,058.0
Less: Imputed interest	(5,510.6)
Present value of future lease payments	4,547.4
Less: Current portion of lease obligations	(119.1)
Long-term portion of lease obligations	4,428.3
Finance Leases
2020 (excluding the three months ended March 31, 2020)	16.3
2021	21.7
2022	21.6
2023	20.8
2024	16.7
Thereafter	393.5
Total lease payments	490.6
Less: Imputed interest	(266.3)
Present value of future lease payments	224.3
Less: Current portion of lease obligations	(6.6)
Long-term portion of lease obligations	217.7
Financing Obligations
2020 (excluding the three months ended March 31, 2020)	277.3
2021	367.3
2022	367.3
2023	367.3
2024	367.3
Thereafter	9,270.6
Total lease payments	11,017.1
Less: Imputed interest	(6,887.9)
Present value of future lease payments	4,129.2
Less: Current portion of lease obligations	(35.7)	$ (40.5)
Long-term portion of lease obligations	$ 4,093.5	$ 4,102.2