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Share-based Payments (Summary of Stock Option Pricing Assumptions) (Details)	6 Months Ended
	Jun. 30, 2023	Jun. 30, 2022
Employee Stock Option [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Risk free interest rate	3.90%	2.20%
Expected dividend yield	2.05%	1.74%
Expected lives of the stock options	2 years	4 years
Expected volatility	33.30%	31.70%
Premium-priced Stock Options
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Risk free interest rate	3.00%
Expected dividend yield	1.63%
Expected lives of the stock options	4 years
Expected volatility	30.20%
Performance Share Units With Market Conditions [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Risk free interest rate	2.70%
Expected dividend yield	1.63%
Expected lives of the stock options	2 years
Expected volatility	33.40%
Average expected volatility of comparable companies	34.40%

X

- Definition

Share Based Compensation Arrangement By Share Based Payment Award, Fair Value Assumptions, Expected Volatility Rate Of Comparable Companies

+ References

No definition available.

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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.

+ References

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-Topic 718
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The estimated measure of the 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 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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