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Share-Based Compensation and Retirement Benefits - Weighted Average Assumptions (Details) - Employee Stock Option	12 Months Ended
	Dec. 31, 2023
Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items]
Expected annual dividend yield	0.00%
Expected term (years)	6 years 6 months
Minimum
Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items]
Expected unit price volatility	65.00%
Risk-free interest rate	2.90%
Maximum
Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items]
Expected unit price volatility	70.00%
Risk-free interest rate	3.60%

X

- Definition

The estimated dividend rate (a percentage of the share price) to be paid (expected dividends) to holders of the underlying shares over the option's term.

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- Definition

The risk-free interest rate assumption that is used in valuing an option on its own shares.

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- Definition

Rate of weighted-average expected volatility for award under share-based payment arrangement.

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- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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Expected term of award under share-based payment arrangement, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days.

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