Leases - Future Minimum Lease Commitments (Details) - USD ($) $ in Millions	Dec. 31, 2019	Jan. 01, 2019	Dec. 31, 2018
Operating Leases
2020	$ 424.0
2021	403.7
2022	400.6
2023	397.5
2024	381.0
Thereafter	8,153.3
Total lease payments	10,160.1
Less: Imputed interest	(5,585.4)
Present value of future lease payments	4,574.7
Less: Current portion of lease obligations	(124.1)	$ (102.3)	$ 0.0
Long-term portion of lease obligations	4,450.6	3,704.4	0.0
Finance Leases
2020	21.7
2021	21.7
2021	21.6
2022	20.8
2023	16.7
Thereafter	393.5
Total lease payments	496.0
Present value of future lease payments	(270.1)
Present value of future lease payments	225.9
Less: Current portion of lease obligations	(6.5)	(5.8)	0.0
Long-term portion of lease obligations	219.4	218.3	0.0
Financing Obligations
2020	374.7
2021	367.3
2022	367.3
2023	367.3
2024	367.3
Thereafter	9,270.6
Total lease payments	11,114.5
Less: Imputed interest	(6,971.8)
Present value of future lease payments	4,142.7
Less: Current portion of lease obligations	(40.5)	(50.1)	(67.8)
Long-term portion of lease obligations	$ 4,102.2	$ 4,144.2	$ 7,080.6