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Per Common Share Information (Additional Information) (Details) - shares shares in Millions | 3 Months Ended
--- | ---
Mar. 31, 2019 | Mar. 31, 2018
Earnings Per Share [Abstract] |  |
Dilutive effect of share-based compensation | 6.7 | 7.8
Document Fiscal Year Focus | 2019 |
Stock options that were not included in diluted weighted-average shares | 2.0 | 2.5

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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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