CONSOLIDATED STATEMENTS OF OPERATIONS - USD ($) shares in Thousands, $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021
REVENUES:
Total operating revenues	$ 2,671.5	$ 2,454.3	$ 8,006.1	$ 6,911.7
Costs of operations (exclusive of items shown separately below):
Property	808.8	693.4	2,374.3	1,880.0
Depreciation, amortization and accretion	898.1	611.4	2,540.4	1,688.7
Selling, general, administrative and development expense	231.2	205.9	748.0	595.7
Other operating expenses	52.8	85.2	98.6	175.4
Total operating expenses	2,018.6	1,626.8	5,845.8	4,406.3
OPERATING INCOME	652.9	827.5	2,160.3	2,505.4
OTHER INCOME (EXPENSE):
Interest income	18.8	9.4	43.0	28.4
Interest expense	(294.0)	(226.1)	(833.0)	(646.8)
Loss on retirement of long-term obligations	(0.4)	0.0	(0.4)	(25.7)
Other income (including foreign currency gains of $474.5, $180.5, $1,111.3 and $422.1, respectively)	478.5	166.8	1,109.4	439.6
Total other income (expense)	202.9	(49.9)	319.0	(204.5)
INCOME FROM CONTINUING OPERATIONS BEFORE INCOME TAXES	855.8	777.6	2,479.3	2,300.9
Income tax provision	(36.1)	(51.4)	(66.0)	(174.5)
NET INCOME	819.7	726.2	2,413.3	2,126.4
Net loss (income) attributable to noncontrolling interests	20.0	(3.2)	36.3	(12.1)
NET INCOME ATTRIBUTABLE TO AMERICAN TOWER CORPORATION COMMON STOCKHOLDERS	$ 839.7	$ 723.0	$ 2,449.6	$ 2,114.3
NET INCOME PER COMMON SHARE AMOUNTS:
Basic net income attributable to American Tower Corporation common stockholders (in dollars per share)	$ 1.80	$ 1.59	$ 5.32	$ 4.70
Diluted net income attributable to American Tower Corporation common stockholders (in dollars per share)	$ 1.80	$ 1.58	$ 5.31	$ 4.68
WEIGHTED AVERAGE COMMON SHARES OUTSTANDING (in thousands):
BASIC (in shares)	465,594	455,224	460,141	450,148
DILUTED (in shares)	466,801	456,977	461,360	451,981
Property
REVENUES:
Total operating revenues	$ 2,609.9	$ 2,368.9	$ 7,825.2	$ 6,731.6
Services
REVENUES:
Total operating revenues	61.6	85.4	180.9	180.1
Costs of operations (exclusive of items shown separately below):
Services	$ 27.7	$ 30.9	$ 84.5	$ 66.5