Leases (Maturities of Lease Liabilities) (Details) $ in Millions	May 31, 2020 USD ($) lease
Operating Leases
2021	$ 378.3
2022	386.3
2023	388.7
2024	391.3
2025	396.0
Thereafter	4,531.4
Total future lease commitments	6,472.0
Less imputed interest	(2,035.1)
Present value of lease liabilities	4,436.9
Noncancelable lease commitments	2,940.0
Lease payments, not yet commenced	$ 114.2
Lease payments, not yet commenced, real estate leases | lease	28
Finance Leases
2021	$ 25.6
2022	26.8
2023	27.3
2024	27.5
2025	28.0
Thereafter	471.2
Total future lease commitments	606.4
Less imputed interest	(232.3)
Present value of lease liabilities	374.1
Noncancelable lease commitments	$ 323.5