LONG-TERM OBLIGATIONS (Narrative) (Details) GH₵ in Millions										1 Months Ended	12 Months Ended
	Oct. 03, 2019 USD ($)	Jun. 14, 2019 USD ($)	Jun. 14, 2019 GHS (GH₵)	Jun. 13, 2019 USD ($)	Apr. 22, 2019 USD ($)	Mar. 15, 2019 USD ($)	Feb. 15, 2019 USD ($)	Feb. 14, 2019	May 29, 2015 USD ($) tower	Dec. 31, 2019 USD ($)	Dec. 31, 2019 USD ($)	Dec. 31, 2018 USD ($)	Dec. 31, 2017 USD ($) quarter	Oct. 03, 2019 EUR (€)	Mar. 29, 2018 USD ($) site
Debt Instrument [Line Items]
Current portion of long-term obligations										$ 2,928,200,000	$ 2,928,200,000	$ 2,754,800,000
Borrowings under credit facilities											5,750,000,000.0	3,263,300,000	$ 5,359,400,000
Loss on retirement of long-term obligations											(22,200,000)	(3,300,000)	(70,200,000)
Proceeds from term loan											$ 1,300,000,000.0	1,500,000,000.0	0
Number of trust sites assets | site															5,114
Payment terms, repayment period											12 months
Finance and capital lease obligations										30,700,000	$ 30,700,000
Finance and capital lease obligations												179,500,000	$ 179,500,000
2019 Multicurrency Credit Facility | Revolving Credit Facility
Debt Instrument [Line Items]
Long-term debt										700,000,000.0	700,000,000.0	1,875,000,000.0
Line of credit facility, maximum borrowing capacity										5,000,000,000.0	5,000,000,000.0
Line of credit facility, remaining borrowing capacity										3,000,000,000.0	3,000,000,000.0
Borrowings under credit facilities											2,500,000,000
Repayments of lines of credit											$ 3,700,000,000
2019 Multicurrency Credit Facility | LIBOR | Revolving Credit Facility
Debt Instrument [Line Items]
Basis spread on variable rate											1.125%
2019 Multicurrency Credit Facility | Base Rate | Revolving Credit Facility
Debt Instrument [Line Items]
Basis spread on variable rate											0.75%
2019 Multicurrency Credit Facility | Minimum | LIBOR | Revolving Credit Facility
Debt Instrument [Line Items]
Basis spread on variable rate											0.875%
2019 Multicurrency Credit Facility | Maximum | Revolving Credit Facility
Debt Instrument [Line Items]
Principal amount										3,000,000,000.0	$ 3,000,000,000.0
2019 Multicurrency Credit Facility | Maximum | LIBOR | Revolving Credit Facility
Debt Instrument [Line Items]
Basis spread on variable rate											1.75%
2019 Credit Facility | Revolving Credit Facility
Debt Instrument [Line Items]
Long-term debt										1,600,000,000.0	$ 1,600,000,000.0	0
Line of credit facility, maximum borrowing capacity										3,750,000,000	3,750,000,000
Line of credit facility, remaining borrowing capacity										2,250,000,000	2,250,000,000
Borrowings under credit facilities											3,200,000,000
Repayments of lines of credit											1,600,000,000
2019 Credit Facility | Swingline Loan
Debt Instrument [Line Items]
Line of credit facility, remaining borrowing capacity										50,000,000.0	$ 50,000,000.0
2019 Credit Facility | LIBOR | Revolving Credit Facility
Debt Instrument [Line Items]
Basis spread on variable rate											1.125%
2019 Credit Facility | Maximum | Revolving Credit Facility
Debt Instrument [Line Items]
Principal amount										2,250,000,000	$ 2,250,000,000
Term Loan 2019 | Revolving Credit Facility
Debt Instrument [Line Items]
Limit on indebtedness of, guaranteed by subsidiaries to the greater of										2,250,000,000
Term Loan 2018 | Base Rate
Debt Instrument [Line Items]
Basis spread on variable rate											0.375%
Term Loan 2018 | Minimum | LIBOR
Debt Instrument [Line Items]
Basis spread on variable rate											0.55%
Term Loan 2018 | Maximum | LIBOR
Debt Instrument [Line Items]
Basis spread on variable rate											1.375%
Unsecured Debt
Debt Instrument [Line Items]
Payment terms, repayment period											3 years
Unsecured Debt | Term Loan 2019
Debt Instrument [Line Items]
Long-term debt										995,200,000	$ 995,200,000	994,800,000
Principal amount										1,000,000,000.0	$ 1,000,000,000.0
Unsecured Debt | Term Loan 2019 | LIBOR
Debt Instrument [Line Items]
Basis spread on variable rate											1.125%
Unsecured Debt | 2019 364-Day Term Loan
Debt Instrument [Line Items]
Current portion of long-term obligations										1,000,000,000.0	$ 1,000,000,000.0
Long-term debt										999,900,000	999,900,000	0
Debt instrument, term								364 days
Principal amount										1,000,000,000.0	$ 1,000,000,000.0
Unsecured Debt | 2019 364-Day Term Loan | LIBOR
Debt Instrument [Line Items]
Basis spread on variable rate											0.80%
Unsecured Debt | Term Loan 2018
Debt Instrument [Line Items]
Long-term debt										0	$ 0	1,499,800,000
Unsecured Debt | Shareholder loans
Debt Instrument [Line Items]
Long-term debt										$ 0	$ 0	59,900,000
Repayments of long-term debt		$ 56,800,000	GH₵ 294.4
Senior Notes
Debt Instrument [Line Items]
Redemption price percentage											100.00%
Repurchase price as percentage of principal										101.00%	101.00%
Maximum adjusted EBITDA										3.5	3.5
Senior Notes | 2.800% senior notes
Debt Instrument [Line Items]
Current portion of long-term obligations										$ 500,000,000.0	$ 500,000,000.0
Long-term debt, stated interest rate										2.80%	2.80%
Long-term debt										$ 749,400,000	$ 749,400,000	747,800,000
Principal amount										$ 750,000,000.0	$ 750,000,000.0
Senior Notes | 5.900% senior notes
Debt Instrument [Line Items]
Long-term debt, stated interest rate										5.90%	5.90%
Long-term debt										$ 498,900,000	$ 498,900,000	498,400,000
Principal amount										500,000,000.0	500,000,000.0
Senior Notes | 3.40% senior notes
Debt Instrument [Line Items]
Current portion of long-term obligations										750,000,000.0	750,000,000.0
Long-term debt, stated interest rate							3.40%
Long-term debt										0	0	1,000,000,000.0
Repayments of debt							$ 1,000,000,000.0
Senior Notes | 5.050% senior notes
Debt Instrument [Line Items]
Long-term debt, stated interest rate					5.05%
Long-term debt										$ 0	$ 0	698,700,000
Face amount of repurchased debt					$ 700,000,000.0
Redemption price percentage					103.005%
Debt instrument, repurchase amount including interest					$ 726,000,000.0
Interest payable					5,000,000.0
Loss on retirement of long-term obligations					(22,100,000)
Debt instrument, fees					$ 21,000,000.0
Senior Notes | 3.375% senior notes
Debt Instrument [Line Items]
Long-term debt, stated interest rate						3.375%
Debt instrument, face amount						$ 650,000,000.0
Proceeds from term loan						$ 1,231,000,000.0
Senior Notes | 3.950% senior notes
Debt Instrument [Line Items]
Long-term debt, stated interest rate						3.95%				3.95%	3.95%
Long-term debt										$ 589,600,000	$ 589,600,000	0
Debt instrument, face amount						$ 600,000,000.0
Debt, interest accrual period						360 days
Principal amount										$ 600,000,000.0	$ 600,000,000.0
Senior Notes | 2.950% senior notes
Debt Instrument [Line Items]
Long-term debt, stated interest rate				2.95%						2.95%	2.95%
Long-term debt										$ 641,300,000	$ 641,300,000	0
Debt instrument, face amount				$ 650,000,000.0
Proceeds from term loan				$ 2,269,000,000.0
Debt, interest accrual period				360 days
Principal amount										$ 650,000,000.0	$ 650,000,000.0
Senior Notes | 3.800% senior notes
Debt Instrument [Line Items]
Long-term debt, stated interest rate				3.80%						3.80%	3.80%
Long-term debt										$ 1,631,700,000	$ 1,631,700,000	0
Debt instrument, face amount				$ 1,650,000,000
Principal amount										$ 1,650,000,000.0	$ 1,650,000,000.0
Senior Notes | 2.750% senior notes
Debt Instrument [Line Items]
Long-term debt, stated interest rate	2.75%									2.75%	2.75%			2.75%
Long-term debt										$ 743,500,000	$ 743,500,000	0
Debt instrument, face amount	$ 750,000,000.0
Debt, interest accrual period	360 days
Principal amount										$ 750,000,000.0	$ 750,000,000.0
Senior Notes | 3.700% senior notes
Debt Instrument [Line Items]
Long-term debt, stated interest rate	3.70%									3.70%	3.70%			3.70%
Long-term debt										$ 591,800,000	$ 591,800,000	$ 0
Debt instrument, face amount | €														€ 600,000,000.0
Proceeds from term loan	$ 1,334,200,000
Principal amount										600,000,000.0	$ 600,000,000.0
Secured Debt | Series 2018-1A Securities
Debt Instrument [Line Items]
Period during which no prepayment consideration is due											36 months
Secured Debt | Series 2018-1A Securities | Secured Tower Revenue Securities, Series 2018-1A
Debt Instrument [Line Items]
Long-term debt, stated interest rate												3.652%
Principal amount															$ 500,000,000.0
Secured Debt | Series 2018-1A Securities | Secured Tower Revenue Securities, Series 2018-1R
Debt Instrument [Line Items]
Long-term debt, stated interest rate												4.459%
Secured Debt | Series 2013-1A and Series 2013-2A Securities
Debt Instrument [Line Items]
Cash trap debt service credit ratio													1.30
Debt covenant, number of consecutive quarters required for release of funds | quarter													2
Minimum debt service credit ratio													1.15
Debt covenant, threshold for majority of holders in event of default											50.00%
Restricted cash and cash equivalents										50,200,000	$ 50,200,000
Secured Debt | Series 2015-1 Class
Debt Instrument [Line Items]
Current portion of long-term obligations										$ 350,000,000.0	$ 350,000,000.0
Long-term debt, stated interest rate										2.35%	2.35%
Long-term debt									$ 350,000,000.0	$ 349,600,000	$ 349,600,000	$ 348,800,000
Period during which no prepayment consideration is due											12 months
Secured Debt | Series 2013-1A Securities
Debt Instrument [Line Items]
Period during which no prepayment consideration is due											18 months
Secured Debt | Commercial Mortgage Pass Through Certificates Series 2015
Debt Instrument [Line Items]
Number of broadcast and wireless communications towers | tower									3,542
Weighted average life									8 years 1 month 6 days
Weighted average interest rate									3.029%
Restricted cash and cash equivalents										13,000,000.0	$ 13,000,000.0
Affiliated Entity | Secured Debt | Series 2018-1A Securities | Secured Tower Revenue Securities, Series 2018-1R
Debt Instrument [Line Items]
Principal amount															$ 26,400,000
Multicurrency Borrowings | 2019 Multicurrency Credit Facility | Revolving Credit Facility
Debt Instrument [Line Items]
Line of credit facility, capacity available for specific purpose other than for trade purchases										1,000,000,000.0	1,000,000,000.0
Letter of Credit | 2019 Multicurrency Credit Facility | Revolving Credit Facility
Debt Instrument [Line Items]
Line of credit facility, capacity available for specific purpose other than for trade purchases										200,000,000.0	200,000,000.0
Letter of Credit | 2019 Credit Facility | Revolving Credit Facility
Debt Instrument [Line Items]
Line of credit facility, capacity available for specific purpose other than for trade purchases										200,000,000.0	200,000,000.0
Swingline Loan | 2019 Multicurrency Credit Facility | Revolving Credit Facility
Debt Instrument [Line Items]
Line of credit facility, capacity available for specific purpose other than for trade purchases										$ 50,000,000.0	$ 50,000,000.0