Share Plans - Schedule of Share Options Activities (Details) - USD ($) $ / shares in Units, $ in Millions	12 Months Ended
Dec. 31, 2022	Dec. 31, 2021
Number of shares
Beginning balance (in shares)	547,522
Granted during the year (in shares)	472,695
Exercised during the year (in shares)	(173,017)
Accrued dividend awards (in shares)	8,829
Lapsed during the year (in shares)	(276,876)
Ending balance (in shares)	579,153	547,522
Options exercisable at December 31, 2022 (in shares)	9,862
Options expected to vest as of December 31, 2022 (in shares)	434,548
Weighted- average exercise price
Beginning balance (in USD per share)	$ 0.99
Granted during the year (in USD per share)	1.00
Exercised during the year (in USD per share)	0.98
Accrued dividend awards (in USD per share)	1.00
Lapsed during the year (in USD per share)	0.96
Ending balance (in USD per share)	1.00	$ 0.99
Options exercisable at December 31, 2022 (in USD per share)	1.00
Options expected to vest as of December 31, 2022 (in USD per share)	$ 1.00
Weighted- average remaining contractual life (years)	3 years	2 years 2 months 12 days
Options exercisable, weighted-average remaining contractual life	3 years 3 months 18 days
Options expected to vest, weighted-average remaining contractual life	3 years
Aggregate intrinsic value ($M)	$ 8.0	$ 10.6
Options exercisable, aggregate intrinsic value	0.1
Options expected to vest, aggregate intrinsic value	$ 6.0

Share-based Compensation Arrangement By Share-based Payment Award, Options, Accrued Dividend Awards

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Share-based Compensation Arrangements By Share-based Payment Award, Options, Accrued Dividend Awards, Weighted Average Exercise Price

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The number of shares into which fully or partially vested stock options outstanding as of the balance sheet date can be currently converted under the option plan.

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The weighted-average price as of the balance sheet date at which grantees can acquire the shares reserved for issuance on vested portions of options outstanding and currently exercisable under the stock option plan.

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Number of options or other stock instruments for which the right to exercise has lapsed under the terms of the plan agreements.

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Gross number of share options (or share units) granted during the period.

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Amount by which the current fair value of the underlying stock exceeds the exercise price of options outstanding.

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Number of options outstanding, including both vested and non-vested options.

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A roll forward is a reconciliation of a concept from the beginning of a period to the end of a period.

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Weighted average price at which grantees can acquire the shares reserved for issuance under the stock option plan.

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Amount by which current fair value of underlying stock exceeds exercise price of fully vested and expected to vest exercisable or convertible options. Includes, but is not limited to, unvested options for which requisite service period has not been rendered but that are expected to vest based on achievement of performance condition, if forfeitures are recognized when they occur.

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Number of fully vested and expected to vest options outstanding that can be converted into shares under option plan. Includes, but is not limited to, unvested options for which requisite service period has not been rendered but that are expected to vest based on achievement of performance condition, if forfeitures are recognized when they occur.

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Weighted-average exercise price, at which grantee can acquire shares reserved for issuance, for fully vested and expected to vest options outstanding. Includes, but is not limited to, unvested options for which requisite service period has not been rendered but that are expected to vest based on achievement of performance condition, if forfeitures are recognized when they occur.

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Weighted average price at which option holders acquired shares when converting their stock options into shares.

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Weighted average price at which grantees could have acquired the underlying shares with respect to stock options of the plan that expired.

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Weighted average per share amount at which grantees can acquire shares of common stock by exercise of options.

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Amount of difference between fair value of the underlying shares reserved for issuance and exercise price of vested portions of options outstanding and currently exercisable.

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Weighted average remaining contractual term for vested portions of options outstanding and currently exercisable or convertible, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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Weighted average remaining contractual term for option awards outstanding, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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Weighted average remaining contractual term for fully vested and expected to vest options outstanding, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days. Includes, but is not limited to, unvested options for which requisite service period has not been rendered but that are expected to vest based on achievement of performance condition, if forfeitures are recognized when they occur.

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Number of share options (or share units) exercised during the current period.

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