BUSINESS SEGMENTS - Narrative (Details) - CoreSite Acquisition	Dec. 31, 2021 dataCenter market	Nov. 14, 2021 dataCenter market
Business Acquisition [Line Items]
Number of sites acquired \| dataCenter	20	24
United States
Business Acquisition [Line Items]
Number of operating markets related to acquired sites \| market	8	8

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 805
-SubTopic 20
-Name Accounting Standards Codification
-Section 50
-Paragraph 5
-Subparagraph (a)
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147479907/805-20-50-5

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