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Share-Based Compensation Plans (Share Options Outstanding And Exercisable) (Details)	12 Months Ended
	Dec. 31, 2021 $ / shares shares
Share Based Compensation Shares Authorized Under Stock Option Plans Exercise Price Range [Line Items]
Options Outstanding, Number Outstanding | shares	49,028
Options Outstanding, Weighted Average-Remaining Contractual Life	2 months 12 days
Options Outstanding, Weighted Average Exercise Price	$ 88.52
Options Exercisable, Number Exercisable | shares	49,028
Options Exercisable, Weighted-Average Exercise Price	$ 88.52
Exercise Prices Range 1 [Member]
Share Based Compensation Shares Authorized Under Stock Option Plans Exercise Price Range [Line Items]
Ranges of Exercise Prices, Lower range limit	88.32
Ranges of Exercise Prices, Upper range limit	$ 88.32
Options Outstanding, Number Outstanding | shares	48,574
Options Outstanding, Weighted Average-Remaining Contractual Life	1 month 6 days
Options Outstanding, Weighted Average Exercise Price	$ 88.32
Options Exercisable, Number Exercisable | shares	48,574
Options Exercisable, Weighted-Average Exercise Price	$ 88.32
Exercise Prices Range 2 [Member]
Share Based Compensation Shares Authorized Under Stock Option Plans Exercise Price Range [Line Items]
Ranges of Exercise Prices, Lower range limit	88.33
Ranges of Exercise Prices, Upper range limit	$ 110.13
Options Outstanding, Number Outstanding | shares	454
Options Outstanding, Weighted Average-Remaining Contractual Life	8 months 12 days
Options Outstanding, Weighted Average Exercise Price	$ 110.13
Options Exercisable, Number Exercisable | shares	454
Options Exercisable, Weighted-Average Exercise Price	$ 110.13
Exercise Prices Range 3 [Member]
Share Based Compensation Shares Authorized Under Stock Option Plans Exercise Price Range [Line Items]
Ranges of Exercise Prices, Lower range limit	90.49
Ranges of Exercise Prices, Upper range limit	$ 110.13
Options Outstanding, Number Outstanding | shares
Options Outstanding, Weighted Average Exercise Price	$ 0
Options Exercisable, Number Exercisable | shares
Options Exercisable, Weighted-Average Exercise Price	$ 0

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The floor of a customized range of exercise prices for purposes of disclosing shares potentially issuable under outstanding stock option awards on all stock option plans and other required information pertaining to awards in the customized range.

+ References

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-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 2
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The number of shares reserved for issuance pertaining to the outstanding exercisable stock options as of the balance sheet date in the customized range of exercise prices for which the market and performance vesting condition has been satisfied.

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The number of shares reserved for issuance pertaining to the outstanding stock options as of the balance sheet date for all option plans in the customized range of exercise prices.

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The ceiling of a customized range of exercise prices for purposes of disclosing shares potentially issuable under outstanding stock option awards on all stock option plans and other required information pertaining to awards in the customized range.

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Weighted average exercise price as of the balance sheet date for those equity-based payment arrangements exercisable and outstanding.

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The weighted average price as of the balance sheet date at which grantees could acquire the underlying shares with respect to all outstanding stock options which are in the customized range of exercise prices.

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

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