NOTES RECEIVABLE AND OTHER NON-CURRENT ASSETS (Notes Receivable And Other Non-current Assets ) (Details) - USD ($) $ in Millions	Dec. 31, 2019	Dec. 31, 2018
Notes Receivable And Other Long Term Assets [Abstract]
Long-term prepaid ground rent	$ 0.0	$ 607.5
Notes receivable	1.1	1.0
Other miscellaneous assets	405.3	354.1
Notes receivable and other non-current assets	$ 406.4	$ 962.6

Amount, after allowance for credit loss, of accounts and financing receivables, classified as noncurrent. Includes, but is not limited to, notes and loan receivable.

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 310
-SubTopic 10
-Section 45
-Paragraph 2
-URI http://asc.fasb.org/extlink&oid=118952595&loc=d3e4428-111522

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02(3))
-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant