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Net Income Per Share | 3 Months Ended
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Mar. 31, 2025
Earnings Per Share [Abstract] |
Net Income Per Share | Net Income Per Share The calculations of basic and diluted net income per share are as follows:
|  | Three Months Ended March 31,
(In millions, except per share data) |  | 2025 |  | 2024
Net income - basic and diluted |  | $ | 808.7 |  |  | $ | 722.0 |
Weighted average shares - basic |  | 106.7 |  |  | 107.8 |
Effect of dilutive securities: |  |  |  |
Stock options |  | 2.5 |  |  | 5.3 |
Restricted stock awards and restricted stock units |  | 2.0 |  |  | 2.0 |
Weighted average shares - diluted |  | 111.2 |  |  | 115.1 |
Net income per share - basic |  | $ | 7.58 |  |  | $ | 6.70 |
Net income per share - diluted |  | $ | 7.27 |  |  | $ | 6.27 |
Shares which have been excluded from diluted per share amounts because their effect would have been antidilutive include the following:
|  | Three Months Ended March 31,
(Shares in millions) |  | 2025 |  | 2024
Stock options |  | 4.8 |  |  | 1.5 |
Restricted stock awards and restricted stock units |  | 1.0 |  |  | — |

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- Definition The entire disclosure for earnings per share. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 260 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 1 -Subparagraph (c) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482662/260-10-50-1 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Topic 260 -Name Accounting Standards Codification -Publisher FASB -URI https://asc.fasb.org/260/tableOfContent Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Topic 260 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Publisher FASB -URI https://asc.fasb.org/1943274/2147482662/260-10-50-2 Reference 4: http://www.xbrl.org/2003/role/disclosureRef -Topic 260 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 3 -Publisher FASB -URI https://asc.fasb.org/1943274/2147482662/260-10-50-3 + Details
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