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Stock-Based Compensation (Schedule Of Assumptions For SOSAR) (Details) - $ / shares	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Stock-Based Compensation [Abstract]
Risk-free interest rate	0.30%	1.30%	2.40%
Expected life	3 years 8 months 12 days	3 years 9 months 18 days	3 years 10 months 24 days
Expected dividend yield	0.00%	0.00%	0.00%
Volatility	35.20%	32.40%	34.70%
Weighted-average Black-Scholes fair value per share at date of grant	$ 403.01	$ 231.52	$ 176.79

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

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

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The weighted average grant-date fair value of options granted during the reporting period as calculated by applying the disclosed option pricing methodology.

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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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