COMMITMENTS AND CONTINGENCIES (Details) ₨ in Millions, $ in Millions				6 Months Ended
	Dec. 05, 2016 USD ($)	Dec. 05, 2016 INR (₨)	Mar. 27, 2015 USD ($) communicationsSite renewalPeriod	Jun. 30, 2022 USD ($) communicationsSite renewalPeriod	Dec. 31, 2000 communicationsSite
INDIA
Loss Contingencies [Line Items]
Foreign income tax assessment	$ 69.8	₨ 4,750
Verizon Transaction
Loss Contingencies [Line Items]
Leased assets, number of communication sites | communicationsSite			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 | renewalPeriod			8
Lease renewal term			5 years
AT&T Transaction
Loss Contingencies [Line Items]
Leased assets, number of communication sites | communicationsSite				400	2,000
Aggregate purchase option price for towers | $				$ 1,100.0
Successive terms to renew lease | renewalPeriod				5
Lease renewal term				5 years
Operating lease, term of contract				27 years