COMMITMENTS AND CONTINGENCIES (Narrative) (Details) ₨ in Millions, $ in Millions					1 Months Ended	12 Months Ended
	Aug. 30, 2019 USD ($) tower	Dec. 05, 2016 USD ($)	Dec. 05, 2016 INR (₨)	Mar. 27, 2015 USD ($) communications_site renewal_period	Dec. 31, 2000 tower	Dec. 31, 2019 USD ($) tower renewal_period	Dec. 31, 2016 tower
Loss Contingencies [Line Items]
Loss contingency, foreign income tax assessment		$ 69.8	₨ 4,750
Verizon Transaction
Loss Contingencies [Line Items]
Capital leased assets, number of units | communications_site				11,250
Right to lease, weighted average term				28 years
Aggregate purchase option price for towers | $				$ 5,000.0
Customer lease, initial term				10 years
Successive terms to renew lease | renewal_period				8
Renewal term				5 years
AT&T Transaction
Loss Contingencies [Line Items]
Capital leased assets, number of units						2,200
Aggregate purchase option price for towers | $						$ 937.8
Successive terms to renew lease | renewal_period						4
Renewal term						5 years
Operating lease, term of contract						27 years
Number of sites acquired life to date						228
Number of communications sites acquired						79
Purchase price of towers acquired through purchase option | $						$ 40.2
Purchase price accretion rate (per year)						10.00%
ALLTEL Transaction
Loss Contingencies [Line Items]
Capital leased assets, number of units					1,800
Number of communications sites acquired	243
Average lease term (in years)					15 years
Number of units acquired through purchase option							1,523
Aggregate purchase price							243
Asset acquisition, consideration transferred | $	$ 43.0