ACQUISITIONS (Narrative) (Details) € in Millions, $ in Millions						12 Months Ended
	Dec. 31, 2019 USD ($) markets communications_site	Dec. 26, 2019 USD ($) communications_site	Nov. 28, 2019 USD ($) communications_site	Nov. 28, 2019 EUR (€) communications_site	Aug. 30, 2019 USD ($) communications_site	Dec. 31, 2019 USD ($) markets communications_site	Dec. 19, 2019 communications_site
Business Acquisition [Line Items]
Proceeds from previous acquisition						$ 13.1
Acquisitions, pro forma information, revenue of acquiree since acquisition date, actual						17.6
Acquisitions, pro forma information, gross margin of acquiree since acquisition date actual						$ 12.7
Entel Acquisition
Business Acquisition [Line Items]
Number of communications sites acquired | communications_site		2,400					3,200
Asset acquisition, consideration transferred	$ 800.0	$ 672.8
U.S. Acquisition
Business Acquisition [Line Items]
Number of communications sites acquired | communications_site					400
Asset acquisition, consideration transferred					$ 484.2
Other Acquisitions
Business Acquisition [Line Items]
Number of communications sites acquired | communications_site	676					676
Asset acquisition, consideration transferred						$ 201.8
Orange S.A. | Communication Sites
Business Acquisition [Line Items]
Number of communications sites acquired | communications_site			2,000	2,000
Purchase period			5 years	5 years
Orange S.A. | Communication Sites | Minimum
Business Acquisition [Line Items]
Asset acquisition, consideration transferred			$ 550.5	€ 500.0
Orange S.A. | Communication Sites | Maximum
Business Acquisition [Line Items]
Asset acquisition, consideration transferred			$ 660.5	€ 600.0
Eaton Towers Acquisition
Business Acquisition [Line Items]
Percentage of voting interest acquired	100.00%					100.00%
Number of communications sites acquired | communications_site	5,800					5,800
Number of markets in which the entity operates | markets	5					5
Debt assumed						$ 2,000.0
Consideration transferred, receivable from seller						$ 9.7