BUSINESS SEGMENTS (Summarized Segment Financial Information) (Details) - USD ($) $ in Millions	3 Months Ended								12 Months Ended
	Dec. 31, 2019	Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2019	Dec. 31, 2018	Sep. 30, 2018	Jun. 30, 2018	Mar. 31, 2018	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Segment Reporting Information [Line Items]
Segment revenues	$ 1,923.7	$ 1,953.6	$ 1,889.6	$ 1,813.4	$ 2,131.9	$ 1,785.5	$ 1,780.9	$ 1,741.8	$ 7,580.3	$ 7,440.1	$ 6,663.9
Interest (expense) income, TV Azteca									0.0	(0.1)	10.8
Stock-based compensation expense									111.4	137.5	108.5
Other selling, general, administrative and development expense									156.5	156.1	138.5
Depreciation, amortization and accretion									1,778.4	2,110.8	1,715.9
Other expense									938.3	1,263.6	1,009.1
INCOME FROM CONTINUING OPERATIONS BEFORE INCOME TAXES									1,916.4	1,154.6	1,256.1
Capital expenditures									1,038.9	945.2	835.4
Impairment charges									94.2	394.0	211.4
Finance lease payments									18.0
Payments for perpetual land easements									29.6
Capital lease payments										32.0	31.8
Operating Expense
Segment Reporting Information [Line Items]
Stock-based compensation expense									2.8	3.3	2.9
Selling, General and Administrative
Segment Reporting Information [Line Items]
Stock-based compensation expense									108.6	134.2	105.6
Selling General Administrative And Development Expense
Segment Reporting Information [Line Items]
Stock-based compensation expense										134.2	105.6
U.S.
Segment Reporting Information [Line Items]
Segment revenues									4,304.1	3,947.5	3,703.7
Asia
Segment Reporting Information [Line Items]
Segment revenues									1,217.0	1,540.5
Africa
Segment Reporting Information [Line Items]
Segment revenues									583.9	545.5
Europe
Segment Reporting Information [Line Items]
Segment revenues									134.6	141.8
Latin America
Segment Reporting Information [Line Items]
Segment revenues									1,340.7	1,264.8
Operating Segments
Segment Reporting Information [Line Items]
Segment revenues									7,580.3	7,440.1	6,663.9
Segment operating expenses									2,214.0	2,174.5	2,053.7
Interest (expense) income, TV Azteca										(0.1)
Segment gross margin									5,366.3	5,265.5	4,621.0
Selling, general, administrative and development expense									465.3	442.9	392.9
OPERATING INCOME									4,901.0	4,822.6	4,228.1
Other
Segment Reporting Information [Line Items]
Stock-based compensation expense									111.4	137.5	108.5
Other selling, general, administrative and development expense									156.5	156.1	138.5
Depreciation, amortization and accretion									1,778.4	2,110.8	1,715.9
Other expense									938.3	1,263.6	1,009.1
Capital expenditures									12.8	13.9	17.7
Impairment charges									394.0
Property | Asia
Segment Reporting Information [Line Items]
Revenue net of settlement payment received					$ 333.7
Property | Operating Segments
Segment Reporting Information [Line Items]
Segment revenues									7,464.9	7,314.7	6,565.9
Segment operating expenses									2,171.9	2,126.3	2,019.9
Interest (expense) income, TV Azteca										(0.1)
Segment gross margin									5,293.0	5,188.3	4,556.8
Selling, general, administrative and development expense									453.3	428.5	379.2
OPERATING INCOME									4,839.7	4,759.8	4,177.6
Capital expenditures									1,026.1	931.3	817.7
Property | Operating Segments | U.S.
Segment Reporting Information [Line Items]
Segment revenues									4,188.7	3,822.1	3,605.7
Segment operating expenses									807.9	771.0	746.5
Interest (expense) income, TV Azteca										0.0
Segment gross margin									3,380.8	3,051.1	2,859.2
Selling, general, administrative and development expense									175.5	165.2	151.4
OPERATING INCOME									3,205.3	2,885.9	2,707.8
Capital expenditures									359.5	376.9	360.6
Property | Operating Segments | Asia
Segment Reporting Information [Line Items]
Segment revenues									1,217.0	1,540.5	1,164.4
Segment operating expenses									715.9	710.9	649.0
Interest (expense) income, TV Azteca										0.0
Segment gross margin									501.1	829.6	515.4
Selling, general, administrative and development expense									99.9	110.7	82.4
OPERATING INCOME									401.2	718.9	433.0
Capital expenditures									134.5	101.0	118.0
Property | Operating Segments | Africa
Segment Reporting Information [Line Items]
Segment revenues									583.9	545.5	503.6
Segment operating expenses									209.0	208.0	212.9
Interest (expense) income, TV Azteca										0.0
Segment gross margin									374.9	337.5	290.7
Selling, general, administrative and development expense									53.7	48.0	47.3
OPERATING INCOME									321.2	289.5	243.4
Capital expenditures									258.5	212.5	124.1
Property | Operating Segments | Europe
Segment Reporting Information [Line Items]
Segment revenues									134.6	141.8	122.6
Segment operating expenses									27.8	30.1	25.4
Interest (expense) income, TV Azteca										0.0
Segment gross margin									106.8	111.7	97.2
Selling, general, administrative and development expense									23.2	21.1	20.6
OPERATING INCOME									83.6	90.6	76.6
Capital expenditures									13.2	20.2	17.6
Property | Operating Segments | Latin America
Segment Reporting Information [Line Items]
Segment revenues									1,340.7	1,264.8	1,169.6
Segment operating expenses									411.3	406.3	386.1
Interest (expense) income, TV Azteca										(0.1)
Segment gross margin									929.4	858.4	794.3
Selling, general, administrative and development expense									101.0	83.5	77.5
OPERATING INCOME									828.4	774.9	716.8
Capital expenditures									260.4	220.7	197.4
Services | Operating Segments
Segment Reporting Information [Line Items]
Segment revenues									115.4	125.4	98.0
Segment operating expenses									42.1	48.2	33.8
Interest (expense) income, TV Azteca										0.0
Segment gross margin									73.3	77.2	64.2
Selling, general, administrative and development expense									12.0	14.4	13.7
OPERATING INCOME									61.3	62.8	50.5
Capital expenditures									$ 0.0	$ 0.0	0.0
TV Azteca [Member] | Operating Segments
Segment Reporting Information [Line Items]
Interest (expense) income, TV Azteca											10.8
TV Azteca [Member] | Property | Operating Segments
Segment Reporting Information [Line Items]
Interest (expense) income, TV Azteca											10.8
TV Azteca [Member] | Property | Operating Segments | U.S.
Segment Reporting Information [Line Items]
Interest (expense) income, TV Azteca											0.0
TV Azteca [Member] | Property | Operating Segments | Asia
Segment Reporting Information [Line Items]
Interest (expense) income, TV Azteca											0.0
TV Azteca [Member] | Property | Operating Segments | Africa
Segment Reporting Information [Line Items]
Interest (expense) income, TV Azteca											0.0
TV Azteca [Member] | Property | Operating Segments | Europe
Segment Reporting Information [Line Items]
Interest (expense) income, TV Azteca											0.0
TV Azteca [Member] | Property | Operating Segments | Latin America
Segment Reporting Information [Line Items]
Interest (expense) income, TV Azteca											10.8
TV Azteca [Member] | Services | Operating Segments
Segment Reporting Information [Line Items]
Interest (expense) income, TV Azteca											$ 0.0