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Earnings Per Share (Schedule Of Anti-Dilutive Options and Awards) (Details) - $ / shares shares in Thousands | 12 Months Ended
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Dec. 31, 2017 | Dec. 31, 2016 | Dec. 31, 2015
Earnings Per Share [Abstract] |  |  |
Stock options excluded from the calculation of diluted EPS (shares) | 2,468 | 2,610 | 3,559
Weighted average exercise price of stock options excluded from the calculation of diluted EPS (in dollars per share) | $ 25.62 | $ 26.29 | $ 24.40
Other equity awards excluded from the calculation of diluted EPS (shares) | 176 | 37 | 98

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- Definition Securities (including those issuable pursuant to contingent stock agreements) that could potentially dilute basic earnings per share (EPS) or earnings per unit (EPU) in the future that were not included in the computation of diluted EPS or EPU because to do so would increase EPS or EPU amounts or decrease loss per share or unit amounts for the period presented. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=6371337&loc=d3e3550-109257 + Details
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