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Shareholders' Equity - Additional Information (Detail) - USD ($) shares in Millions, $ in Millions | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2024 | Sep. 30, 2023 | Sep. 30, 2024 | Sep. 30, 2023
Equity, Class of Treasury Stock [Line Items] |  |  |  |
Repurchase and retirement of common stock |  | $ 58.3 | $ 82.3 | $ 159.4
Share repurchase program, authorized, amount | $ 1,109.3 |  | $ 1,109.3 |
Common stock excluded from calculation of diluted earnings per share (shares) | 2.9 | 1.0 | 2.7 | 1.4
Common Stock |  |  |  |
Equity, Class of Treasury Stock [Line Items] |  |  |  |
Repurchase and retirement of common stock (shares) |  | 0.5 | 1.0 | 1.4

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- Definition Amount authorized for purchase of share under share repurchase plan. Includes, but is not limited to, repurchase of stock and unit of ownership. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 505 -SubTopic 30 -Name Accounting Standards Codification -Section 50 -Paragraph 4 -Publisher FASB -URI https://asc.fasb.org/1943274/2147481520/505-30-50-4 + Details
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- Definition Securities (including those issuable pursuant to contingent stock agreements) that could potentially dilute basic earnings per share (EPS) or earnings per unit (EPU) in the future that were not included in the computation of diluted EPS or EPU because to do so would increase EPS or EPU amounts or decrease loss per share or unit amounts for the period presented. + 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 + Details
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