FAIR VALUE MEASUREMENTS (Narrative) (Details) COP in Billions	12 Months Ended
	Dec. 31, 2017 USD ($) interest_rate_swap	Dec. 31, 2016 USD ($)	Dec. 31, 2017 COP interest_rate_swap	Dec. 08, 2017	Jul. 01, 2015 USD ($)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair value of embedded derivative asset					$ 14,600,000
Business combination, contingent consideration arrangements, range of outcomes, value, low	$ 9,100,000
Business combination, contingent consideration arrangements, range of outcomes, value, high	10,100,000
Assets held and used, original carrying value	21,700,000,000	$ 12,700,000,000
Impairment of long-lived assets held for use	211,400,000	28,500,000
Debt, long-term and short-term, combined amount	20,205,100,000	18,533,500,000
Fair Value, Inputs, Level 3
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair value loss recognized in other expense	900,000
Estimate of Fair Value Measurement
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Long-term debt, fair value	20,600,000,000	18,800,000,000
Estimate of Fair Value Measurement | Fair Value, Inputs, Level 1
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Long-term debt, fair value	13,300,000,000	11,800,000,000
Estimate of Fair Value Measurement | Fair Value, Inputs, Level 2
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Long-term debt, fair value	$ 7,300,000,000	7,000,000,000
Senior Notes | 3.000% senior notes
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative, stated interest rate	3.00%		3.00%	3.00%
Senior Notes | 2.250% senior notes
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Interest rate swap agreements	$ 23,700,000	22,300,000
Derivative, stated interest rate	2.25%		2.25%
Interest Rate Swap
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative, fair value	$ 28,500,000	$ 24,700,000
Interest Rate Swap | Senior Notes | 3.000% senior notes
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Interest rate swaps entered into | interest_rate_swap	3		3
Interest rate swap agreements	$ 500,000,000
Derivative, notional amount	$ 800,000.0
Derivative, fixed interest rate	2.49%		2.49%
Interest Rate Swap | Senior Notes | 2.250% senior notes
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Interest rate swaps entered into | interest_rate_swap	3		3
Derivative, notional amount	$ 600,000,000
Fair value loss recognized in other expense	1,500,000.0
Interest Rate Swap | Revolving Credit Facility | Colombian Credit Facility
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative asset, notional amount	$ 23,500,000		COP 70.0
Derivative, fixed interest rate	5.74%		5.74%
Colombia
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Business combination, contingent consideration arrangements, range of outcomes, value, high	$ 0
Colombia | Interest Rate Swap
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative, fair value	$ 500,000