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EARNINGS PER COMMON SHARE (Tables)
 3 Months Ended
Mar. 31, 2025
Earnings Per Share [Abstract]  
Schedule of Basic and Diluted Earnings Per 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 March 31,
20252024
Net income from continuing operations attributable to American Tower common stockholders$488.7 $825.7 
Net income from discontinued operations attributable to American Tower common stockholders— 91.7 
Net income attributable to American Tower Corporation common stockholders$488.7 $917.4 
Basic weighted average common shares outstanding467,640 466,519 
Dilutive securities879 1,141 
Diluted weighted average common shares outstanding468,519 467,660 
Basic net income from continuing operations attributable to American Tower Corporation common stockholders$1.05 $1.77 
Basic net income from discontinued operations attributable to American Tower Corporation common stockholders— 0.20 
Basic net income attributable to American Tower Corporation common stockholders per common share$1.05 $1.97 
Diluted net income from continuing operations attributable to American Tower Corporation common stockholders$1.04 $1.77 
Diluted net income from discontinued operations attributable to American Tower Corporation common stockholders— 0.20 
Diluted net income attributable to American Tower Corporation common stockholders$1.04 $1.96 
Schedule of Antidilutive Securities Excluded from Computation of Earnings Per Share 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 March 31,
 20252024
Restricted stock units121 126