ACCRUED EXPENSES (Details) - USD ($) $ in Millions	Mar. 31, 2020	Dec. 31, 2019
Payables and Accruals [Abstract]
Accrued construction costs	$ 19.4	$ 27.8
Accrued income tax payable	72.7	55.2
Accrued pass-through costs	64.5	74.2
Amounts payable to tenants	67.5	77.9
Accrued property and real estate taxes	196.0	198.1
Accrued rent	72.6	75.6
Accrued treasury stock repurchases	5.4	0.0
Payroll and related withholdings	64.1	102.4
Other accrued expenses	314.2	347.0
Total accrued expenses	$ 876.4	$ 958.2