Stock-Based Compensation Plans (Schedule Of Company's Stock Option Plans) (Details) shares in Thousands	12 Months Ended
Dec. 31, 2018 $ / shares shares
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding [Roll Forward]
Number of Shares, Options outstanding Beginning Balance \| shares	2,550
Number of Shares, Granted \| shares	412
Number of Shares, Exercised \| shares	(450)
Number of Shares, Canceled \| shares	(102)
Number of Shares, Options outstanding Ending Balance \| shares	2,410
Number of Shares, Options exercisable Ending Balance \| shares	1,049
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Exercise Price [Roll Forward]
Weighted Average Exercise Price, Options outstanding Beginning Balance \| $ / shares	$ 56.45
Weighted Average Exercise Price, Granted \| $ / shares	93.40
Weighted Average Exercise Price, Exercised \| $ / shares	53.73
Weighted Average Exercise Price, Canceled \| $ / shares	66.70
Weighted Average Exercise Price, Options outstanding Ending Balance \| $ / shares	62.84
Weighted Average Exercise Price, Options exercisable Ending Balance \| $ / shares	$ 56.43
Weighted Average Remaining Life (Years), Options outstanding	7 years 1 month 6 days
Weighted Average Remaining Life (Years), Options exercisable	6 years 1 month 24 days

The number of shares into which fully or partially vested stock options outstanding as of the balance sheet date can be currently converted under the option plan.

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The weighted-average price as of the balance sheet date at which grantees can acquire the shares reserved for issuance on vested portions of options outstanding and currently exercisable under the stock option plan.

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For presentations that combine terminations, the number of shares under options that were cancelled during the reporting period as a result of occurrence of a terminating event specified in contractual agreements pertaining to the stock option plan or that expired.

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Weighted average price of options that were either forfeited or expired.

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Gross number of share options (or share units) granted during the period.

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No definition available.

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Number of options outstanding, including both vested and non-vested options.

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Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
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A roll forward is a reconciliation of a concept from the beginning of a period to the end of a period.

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Weighted average price at which grantees can acquire the shares reserved for issuance under the stock option plan.

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Weighted average price at which option holders acquired shares when converting their stock options into shares.

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Weighted average per share amount at which grantees can acquire shares of common stock by exercise of options.

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

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

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Number of share options (or share units) exercised during the current period.

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