ACCRUED EXPENSES (Details) - USD ($) $ in Millions	Sep. 30, 2019	Dec. 31, 2018
Payables and Accruals [Abstract]
Accrued property and real estate taxes	$ 195.1	$ 169.7
Accrued pass-through costs	74.4	71.2
Amounts payable to tenants	65.8	93.5
Accrued rent	75.3	61.4
Payroll and related withholdings	81.4	90.4
Accrued construction costs	30.0	41.5
Accrued income tax payable	34.1	57.9
Accrued pass-through taxes	5.2	2.2
Other accrued expenses	295.4	360.5
Total accrued expenses	$ 856.7	$ 948.3