BUSINESS SEGMENTS - Summarized Segment Financial Information (Details) - USD ($) $ in Millions		3 Months Ended		6 Months Ended
	Mar. 29, 2023	Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2023	Jun. 30, 2022	Dec. 31, 2022
Segment Reporting Information [Line Items]
Segment revenues		$ 2,771.7	$ 2,674.3	$ 5,538.9	$ 5,334.6
Segment selling, general, administrative and development expense		244.4	222.9	508.3	516.8
OPERATING INCOME		873.7	782.3	1,649.3	1,507.4
Stock-based compensation expense		49.4	42.2	114.9	98.9
Depreciation, amortization and accretion				1,558.7	1,642.3
Other expense		81.2	(378.3)	179.0	(630.9)
INCOME FROM CONTINUING OPERATIONS BEFORE INCOME TAXES		474.7	898.3	843.1	1,623.5
Total assets		66,879.0	68,116.8	66,879.0	68,116.8	$ 67,194.5
Impairments charges		37.5
Disposal Group, Disposed of by Sale, Not Discontinued Operations | Mexico Fiber
Segment Reporting Information [Line Items]
Gain (loss) on sale	$ 80.0			(78.9)
Disposal Group, Disposed of by Sale, Not Discontinued Operations | ATC Poland
Segment Reporting Information [Line Items]
Gain (loss) on sale				(67.3)
Selling, General and Administrative Expenses
Segment Reporting Information [Line Items]
Stock-based compensation expense		49.4	42.2	114.9
U.S. & Canada
Segment Reporting Information [Line Items]
Segment revenues		1,346.3	1,295.7	2,686.6	2,587.6
Asia-Pacific
Segment Reporting Information [Line Items]
Segment revenues		261.7	298.0	512.8	596.5
Africa
Segment Reporting Information [Line Items]
Segment revenues		321.2	285.5	638.2	553.3
Europe
Segment Reporting Information [Line Items]
Segment revenues		198.2	178.8	389.9	377.3
Latin America
Segment Reporting Information [Line Items]
Segment revenues		439.4	425.2	903.5	844.5
Data Centers
Segment Reporting Information [Line Items]
Segment revenues		204.9	191.1	407.9	375.4
Operating Segments
Segment Reporting Information [Line Items]
Segment revenues		2,771.7	2,674.3	5,538.9	5,334.6
Segment operating expenses		827.3	822.9	1,633.4	1,622.3
Segment gross margin		1,944.4	1,851.4	3,905.5	3,712.3
Segment selling, general, administrative and development expense		140.3	132.2	278.8	311.5
OPERATING INCOME		1,804.1	1,719.2	3,626.7	3,400.8
INCOME FROM CONTINUING OPERATIONS BEFORE INCOME TAXES					1,623.5
Operating Segments | Property
Segment Reporting Information [Line Items]
Segment revenues		2,728.6	2,614.5	5,443.1	5,215.3
Segment operating expenses		810.1	794.0	1,597.1	1,565.5
Segment gross margin		1,918.5	1,820.5	3,846.0	3,649.8
Segment selling, general, administrative and development expense		135.0	127.1	267.8	300.4
OPERATING INCOME		1,783.5	1,693.4	3,578.2	3,349.4
Total assets		66,156.1	67,493.9	66,156.1	67,493.9
Operating Segments | U.S. & Canada
Segment Reporting Information [Line Items]
Segment revenues		1,303.2	1,235.9	2,590.8	2,468.3
Segment operating expenses		216.9	212.6	422.2	412.4
Segment gross margin		1,086.3	1,023.3	2,168.6	2,055.9
Segment selling, general, administrative and development expense		41.7	43.5	82.5	86.3
OPERATING INCOME		1,044.6	979.8	2,086.1	1,969.6
Total assets		26,595.2	26,882.2	26,595.2	26,882.2
Operating Segments | Asia-Pacific
Segment Reporting Information [Line Items]
Segment revenues		261.7	298.0	512.8	596.5
Segment operating expenses		179.6	181.7	348.0	356.8
Segment gross margin		82.1	116.3	164.8	239.7
Segment selling, general, administrative and development expense		17.4	6.1	26.2	54.0
OPERATING INCOME		64.7	110.2	138.6	185.7
Total assets		3,941.7	4,972.0	3,941.7	4,972.0
Operating Segments | Africa
Segment Reporting Information [Line Items]
Segment revenues		321.2	285.5	638.2	553.3
Segment operating expenses		112.8	111.9	231.3	209.6
Segment gross margin		208.4	173.6	406.9	343.7
Segment selling, general, administrative and development expense		18.7	22.0	40.1	44.5
OPERATING INCOME		189.7	151.6	366.8	299.2
Total assets		4,180.6	4,752.8	4,180.6	4,752.8
Operating Segments | Europe
Segment Reporting Information [Line Items]
Segment revenues		198.2	178.8	389.9	377.3
Segment operating expenses		77.3	75.3	150.4	167.6
Segment gross margin		120.9	103.5	239.5	209.7
Segment selling, general, administrative and development expense		15.1	14.1	29.7	29.0
OPERATING INCOME		105.8	89.4	209.8	180.7
Total assets		11,659.8	11,259.4	11,659.8	11,259.4
Operating Segments | Latin America
Segment Reporting Information [Line Items]
Segment revenues		439.4	425.2	903.5	844.5
Segment operating expenses		139.8	133.5	277.7	263.5
Segment gross margin		299.6	291.7	625.8	581.0
Segment selling, general, administrative and development expense		23.5	25.9	53.2	54.7
OPERATING INCOME		276.1	265.8	572.6	526.3
Total assets		9,229.1	8,736.9	9,229.1	8,736.9
Operating Segments | Data Centers
Segment Reporting Information [Line Items]
Segment revenues		204.9	191.1	407.9	375.4
Segment operating expenses		83.7	79.0	167.5	155.6
Segment gross margin		121.2	112.1	240.4	219.8
Segment selling, general, administrative and development expense		18.6	15.5	36.1	31.9
OPERATING INCOME		102.6	96.6	204.3	187.9
Total assets		10,549.7	10,890.6	10,549.7	10,890.6
Operating Segments | Services
Segment Reporting Information [Line Items]
Segment revenues		43.1	59.8	95.8	119.3
Segment operating expenses		17.2	28.9	36.3	56.8
Segment gross margin		25.9	30.9	59.5	62.5
Segment selling, general, administrative and development expense		5.3	5.1	11.0	11.1
OPERATING INCOME		20.6	25.8	48.5	51.4
Total assets		102.9	84.7	102.9	84.7
Other
Segment Reporting Information [Line Items]
Stock-based compensation expense		49.4	42.2	114.9	98.9
Other selling, general, administrative and development expense		54.7	48.5	114.6	106.4
Depreciation, amortization and accretion		764.6	826.5	1,558.7	1,642.3
Other expense		460.7	(96.3)	995.4	(70.3)
Total assets		$ 620.0	$ 538.2	$ 620.0	$ 538.2