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EARNINGS PER COMMON SHARE
 9 Months Ended
Sep. 30, 2025
Earnings Per Share [Abstract]  
EARNINGS PER COMMON SHARE EARNINGS PER COMMON SHARE
The following table sets forth basic and diluted net income per common share computational data (shares in thousands, except per share data):
Three Months Ended September 30,Nine Months Ended September 30,
2025202420252024
Net income from continuing operations attributable to American Tower common stockholders$853.3 $416.2 $1,708.8 $2,003.7 
Net loss from discontinued operations attributable to American Tower common stockholders— (1,208.5)— (978.3)
Net income (loss) attributable to American Tower Corporation common stockholders$853.3 $(792.3)$1,708.8 $1,025.4 
Basic weighted average common shares outstanding468,287 467,196 468,036 466,919 
Dilutive securities752 1,065 820 1,082 
Diluted weighted average common shares outstanding469,039 468,261 468,856 468,001 
Basic net income from continuing operations attributable to American Tower Corporation common stockholders$1.82 $0.89 $3.65 $4.29 
Basic net loss from discontinued operations attributable to American Tower Corporation common stockholders— (2.59)— (2.10)
Basic net income (loss) attributable to American Tower Corporation common stockholders per common share$1.82 $(1.70)$3.65 $2.20 
Diluted net income from continuing operations attributable to American Tower Corporation common stockholders$1.82 $0.89 $3.64 $4.28 
Diluted net loss from discontinued operations attributable to American Tower Corporation common stockholders— (2.58)— (2.09)
Diluted net income (loss) attributable to American Tower Corporation common stockholders$1.82 $(1.69)$3.64 $2.19 
Shares Excluded From Dilutive Effect—The following shares were not included in the computation of diluted earnings per share because the effect would be anti-dilutive (in thousands, on a weighted average basis)
Three Months Ended September 30,Nine Months Ended September 30,
 2025202420252024
Restricted stock units— 2 1 —