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EARNINGS PER COMMON SHARE
 3 Months Ended
Mar. 31, 2024
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 March 31,
20242023
Net income attributable to American Tower Corporation common stockholders$917.4 $335.8 
Basic weighted average common shares outstanding466,519 465,741 
Dilutive securities1,141 1,069 
Diluted weighted average common shares outstanding467,660 466,810 
Basic net income attributable to American Tower Corporation common stockholders per common share$1.97 $0.72 
Diluted net income attributable to American Tower Corporation common stockholders per common share$1.96 $0.72 
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 March 31,
 20242023
Restricted stock units126 5