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EARNINGS PER COMMON SHARE (Tables) | 6 Months Ended
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Jun. 30, 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 June 30, |  | Six Months Ended June 30,
|  | 2025 |  | 2024 |  | 2025 |  | 2024
Net income from continuing operations attributable to American Tower common stockholders |  | $ | 366.8 |  |  | $ | 761.8 |  |  | $ | 855.5 |  |  | $ | 1,587.5 |
Net income from discontinued operations attributable to American Tower common stockholders |  | — |  |  | 138.5 |  |  | — |  |  | 230.2 |
Net income attributable to American Tower Corporation common stockholders |  | $ | 366.8 |  |  | $ | 900.3 |  |  | $ | 855.5 |  |  | $ | 1,817.7 |
Basic weighted average common shares outstanding |  | 468,178 |  |  | 467,038 |  |  | 467,909 |  |  | 466,778 |
Dilutive securities |  | 613 |  |  | 743 |  |  | 808 |  |  | 1,015 |
Diluted weighted average common shares outstanding |  | 468,791 |  |  | 467,781 |  |  | 468,717 |  |  | 467,793 |
Basic net income from continuing operations attributable to American Tower Corporation common stockholders |  | $ | 0.78 |  |  | $ | 1.63 |  |  | $ | 1.83 |  |  | $ | 3.40 |
Basic net income from discontinued operations attributable to American Tower Corporation common stockholders |  | — |  |  | 0.30 |  |  | — |  |  | 0.49 |
Basic net income attributable to American Tower Corporation common stockholders per common share |  | $ | 0.78 |  |  | $ | 1.93 |  |  | $ | 1.83 |  |  | $ | 3.89 |
Diluted net income from continuing operations attributable to American Tower Corporation common stockholders |  | $ | 0.78 |  |  | $ | 1.63 |  |  | $ | 1.83 |  |  | $ | 3.39 |
Diluted net income from discontinued operations attributable to American Tower Corporation common stockholders |  | — |  |  | 0.30 |  |  | — |  |  | 0.49 |
Diluted net income attributable to American Tower Corporation common stockholders |  | $ | 0.78 |  |  | $ | 1.92 |  |  | $ | 1.83 |  |  | $ | 3.89 |
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 June 30, |  | Six Months Ended June 30,
|  | 2025 |  | 2024 |  | 2025 |  | 2024
Restricted stock units |  | 0 |  |  | 646 |  |  | 1 |  |  | 287 |

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- Definition Tabular disclosure of securities (including those issuable pursuant to contingent stock agreements) that could potentially dilute basic earnings per share (EPS) in the future that were not included in the computation of diluted EPS because to do so would increase EPS amounts or decrease loss per share amounts for the period presented, by antidilutive securities. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Topic 260 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (c) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482662/260-10-50-1 + Details
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- Definition Tabular disclosure of an entity's basic and diluted earnings per share calculations, including a reconciliation of numerators and denominators of the basic and diluted per-share computations for income from continuing operations. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 260 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 1 -Subparagraph (a) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482662/260-10-50-1 + Details
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