Earnings Per Share (Schedule Of Reconciliation Of Shares Outstanding For Basic And Diluted Earnings Per Share) (Details) - shares shares in Thousands	3 Months Ended
Mar. 31, 2019	Mar. 31, 2018
Shares outstanding for basic earnings per share:
Shares outstanding for basic earnings per share (in shares)	86,204	87,331
Shares outstanding for diluted earnings per share:
Shares outstanding for basic earnings per share (in shares)	86,204	87,331
Dilutive effect of share-based payment awards (in shares)	1,345	1,613
Shares outstanding for diluted earnings per share (in shares)	87,549	88,944

Additional shares included in the calculation of diluted EPS as a result of the potentially dilutive effect of share based payment arrangements using the treasury stock method.

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The average number of shares or units issued and outstanding that are used in calculating diluted EPS or earnings per unit (EPU), determined based on the timing of issuance of shares or units in the period.

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Number of [basic] shares or units, after adjustment for contingently issuable shares or units and other shares or units not deemed outstanding, determined by relating the portion of time within a reporting period that common shares or units have been outstanding to the total time in that period.

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