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Earnings per share - Computation of Outstanding Shares For Basic EPS (Details) - shares	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Earnings Per Share [Abstract]
Ordinary share issued (in shares)	215,543,739	250,347,345	250,347,345
Treasury shares (in shares)	(13,050,571)	(4,416,070)	(4,951,897)
Ordinary shares outstanding (in shares)	202,493,168	245,931,275	245,395,448
Shares of unvested restricted stock (in shares)	(4,561,249)	(4,837,602)	(5,822,811)
Ordinary shares outstanding, excluding shares of unvested restricted stock (in shares)	197,931,919	241,093,673	239,572,637

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- Definition

Common Shares Outstanding For Basic EPS

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Share-based Compensation Arrangement by Share-based Payment Award, Restricted Stock, Unvested

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- Definition

Total number of common shares of an entity that have been sold or granted to shareholders (includes common shares that were issued, repurchased and remain in the treasury). These shares represent capital invested by the firm's shareholders and owners, and may be all or only a portion of the number of shares authorized. Shares issued include shares outstanding and shares held in the treasury.

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Number of shares of common stock outstanding. Common stock represent the ownership interest in a corporation.

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Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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Number of previously issued common shares repurchased by the issuing entity and held in treasury.

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