Stock-based Compensation (Schedule Of Retention Awards) (Details) - Retention Awards [Member] shares in Thousands	12 Months Ended
Dec. 31, 2020 $ / shares shares
Schedule of Share-based Compensation Arrangements [Line Items]
Awards, shares nonvested at January 1, 2020 \| shares	1,898
Awards, shares granted \| shares	315
Awards, shares vested \| shares	(645)
Awards, shares forfeited \| shares	(92)
Awards, shares nonvested at December 31, 2020 \| shares	1,476
Awards weighted-average grant-date fair value, nonvested at January 1, 2020 \| $ / shares	$ 112.12
Awards weighted-average grant-date fair value, granted \| $ / shares	185.99
Awards weighted-average grant-date fair value, vested \| $ / shares	77.74
Awards weighted-average grant-date fair value, forfeited \| $ / shares	141.83
Awards weighted-average grant-date fair value, nonvested at December 31, 2020 \| $ / shares	$ 141.06

The number of equity-based payment instruments, excluding stock (or unit) options, that were forfeited during the reporting period.

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-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (c)(1)(iv)(3)
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Weighted average fair value as of the grant date of equity-based award plans other than stock (unit) option plans that were not exercised or put into effect as a result of the occurrence of a terminating event.

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The number of grants made during the period on other than stock (or unit) option plans (for example, phantom stock or unit plan, stock or unit appreciation rights plan, performance target plan).

+ References

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-Publisher FASB
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The weighted average fair value at grant date for nonvested equity-based awards issued during the period on other than stock (or unit) option plans (for example, phantom stock or unit plan, stock or unit appreciation rights plan, performance target plan).

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The number of non-vested equity-based payment instruments, excluding stock (or unit) options, that validly exist and are outstanding as of the balance sheet date.

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Per share or unit weighted-average fair value of nonvested award under share-based payment arrangement. Excludes share and unit options.

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The number of equity-based payment instruments, excluding stock (or unit) options, that vested during the reporting period.

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The weighted average fair value as of grant date pertaining to an equity-based award plan other than a stock (or unit) option plan for which the grantee gained the right during the reporting period, by satisfying service and performance requirements, to receive or retain shares or units, other instruments, or cash in accordance with the terms of the arrangement.

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- Definition

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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No definition available.

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