ACCRUED EXPENSES (Details) - USD ($) $ in Millions	Dec. 31, 2020	Dec. 31, 2019
Accrued Liabilities, Current [Abstract]
Accrued construction costs	$ 46.5	$ 27.8
Accrued income tax payable	20.6	55.2
Accrued pass-through costs	67.1	74.2
Amounts payable for acquisitions	58.9	0.0
Amounts payable to tenants	66.4	77.9
Accrued property and real estate taxes	219.1	198.1
Accrued rent	82.6	75.6
Payroll and related withholdings	104.4	102.4
Other accrued expenses	378.1	347.0
Accrued expenses	$ 1,043.7	$ 958.2