BUSINESS AND SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Rent Expense) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Straight-line ground rent expense	$ 44.4	$ 57.9	$ 62.3