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Share Plans - Share options fair value assumptions (Details) - $ / shares	9 Months Ended
	Sep. 29, 2024	Oct. 01, 2023	Dec. 31, 2023
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Expected volatility range (%), minimum	31.54%	31.54%
Expected volatility range (%), maximum	43.49%	43.49%
Risk-free interest rate (%), minimum	3.67%	3.67%
Risk-free interest rate (%), maximum	5.16%	5.16%
Forfeiture rate (%)	5.00%	5.00%
Weighted average exercise price (in USD per share)	$ 1.00		$ 1.00
Minimum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Dividend yield (%)	3.15%	3.15%
Expected life of share options range (years)	1 year	1 year
Maximum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Dividend yield (%)	3.32%	3.32%
Expected life of share options range (years)	4 years	4 years

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- Definition

Share-Based Compensation Arrangement By Share-Based Payment Award, Forfeiture Rate

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Agreed-upon price for the exchange of the underlying asset relating to the share-based payment award.

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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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The estimated measure of the maximum percentage by which a share price is expected to fluctuate during a period. Volatility also may be defined as a probability-weighted measure of the dispersion of returns about the mean. The volatility of a share price is the standard deviation of the continuously compounded rates of return on the share over a specified period. That is the same as the standard deviation of the differences in the natural logarithms of the stock prices plus dividends, if any, over the period.

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The estimated measure of the minimum percentage by which a share price is expected to fluctuate during a period. Volatility also may be defined as a probability-weighted measure of the dispersion of returns about the mean. The volatility of a share price is the standard deviation of the continuously compounded rates of return on the share over a specified period. That is the same as the standard deviation of the differences in the natural logarithms of the stock prices plus dividends, if any, over the period.

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

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

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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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