CONSOLIDATED STATEMENTS OF OPERATIONS - USD ($) shares in Thousands, $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2024	Sep. 30, 2023
REVENUES:
Total operating revenues	$ 2,522.3	$ 2,521.1	$ 7,579.6	$ 7,556.1
Costs of operations (exclusive of items shown separately below):
Property	626.9	625.5	1,859.2	1,877.0
Depreciation, amortization and accretion	498.5	723.2	1,527.9	2,203.6
Selling, general, administrative and development expense	227.7	220.3	690.3	700.8
Other operating expense	5.1	26.6	5.0	213.2
Total operating expenses	1,383.1	1,608.1	4,143.2	5,043.4
OPERATING INCOME	1,139.2	913.0	3,436.4	2,512.7
OTHER INCOME (EXPENSE):
Interest income	37.7	33.3	103.1	85.0
Interest expense	(356.8)	(356.5)	(1,083.3)	(1,040.6)
Loss on retirement of long-term obligations	0.0	0.0	0.0	(0.3)
Other (expense) income (including foreign currency (losses) gains of $(337.4), $239.0, $(231.4) and $47.1 respectively)	(269.6)	234.5	(137.1)	41.3
Total other expense	(588.7)	(88.7)	(1,117.3)	(914.6)
INCOME FROM CONTINUING OPERATIONS BEFORE INCOME TAXES	550.5	824.3	2,319.1	1,598.1
Income tax provision	(122.4)	(49.5)	(291.1)	(98.4)
NET INCOME FROM CONTINUING OPERATIONS	428.1	774.8	2,028.0	1,499.7
LOSS FROM DISCONTINUED OPERATIONS, NET OF TAXES	(1,208.5)	(197.5)	(978.3)	(145.9)
NET (LOSS) INCOME	(780.4)	577.3	1,049.7	1,353.8
Net (income) loss attributable to noncontrolling interests	(11.9)	9.6	(24.3)	44.6
NET (LOSS) INCOME ATTRIBUTABLE TO AMERICAN TOWER CORPORATION COMMON STOCKHOLDERS, BASIC	(792.3)	586.9	1,025.4	1,398.4
NET (LOSS) INCOME ATTRIBUTABLE TO AMERICAN TOWER CORPORATION COMMON STOCKHOLDERS, DILUTED	(792.3)	586.9	1,025.4	1,398.4
NET INCOME FROM CONTINUING OPERATIONS ATTRIBUTABLE TO AMERICAN TOWER CORPORATION COMMON STOCKHOLDERS, BASIC	416.2	784.4	2,003.7	1,544.3
NET INCOME FROM CONTINUING OPERATIONS ATTRIBUTABLE TO AMERICAN TOWER CORPORATION COMMON STOCKHOLDERS, DILUTED	416.2	784.4	2,003.7	1,544.3
NET LOSS FROM DISCONTINUED OPERATIONS ATTRIBUTABLE TO AMERICAN TOWER CORPORATION COMMON STOCKHOLDERS, BASIC	(1,208.5)	(197.5)	(978.3)	(145.9)
NET LOSS FROM DISCONTINUED OPERATIONS ATTRIBUTABLE TO AMERICAN TOWER CORPORATION COMMON STOCKHOLDERS, DILUTED	$ (1,208.5)	$ (197.5)	$ (978.3)	$ (145.9)
NET INCOME PER COMMON SHARE AMOUNTS:
Basic net income from continuing operations attributable to American Tower Corporation common stockholders (in dollars per share)	$ 0.89	$ 1.68	$ 4.29	$ 3.31
Basic net loss from discontinued operations attributable to American Tower Corporation common stockholders (in dollars per share)	(2.59)	(0.42)	(2.10)	(0.31)
Basic net (loss) income attributable to American Tower Corporation common stockholders (in dollars per share)	(1.70)	1.26	2.20	3.00
Diluted net income from continuing operations attributable to American Tower Corporation common stockholders (in dollars per share)	0.89	1.68	4.28	3.31
Diluted net loss from discontinued operations attributable to American Tower Corporation common stockholders (in dollars per share)	(2.58)	(0.42)	(2.09)	(0.31)
Diluted net (loss) income attributable to American Tower Corporation common stockholders (in dollars per share)	$ (1.69)	$ 1.26	$ 2.19	$ 2.99
WEIGHTED AVERAGE COMMON SHARES OUTSTANDING (in thousands):
BASIC (in shares)	467,196	466,168	466,919	466,000
DILUTED (in shares)	468,261	467,161	468,001	467,034
Property
REVENUES:
Total operating revenues	$ 2,469.9	$ 2,494.9	$ 7,449.6	$ 7,434.1
Services
REVENUES:
Total operating revenues	52.4	26.2	130.0	122.0
Costs of operations (exclusive of items shown separately below):
Services	$ 24.9	$ 12.5	$ 60.8	$ 48.8