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Earnings Per Share Narrative (Details) - $ / shares shares in Millions | 6 Months Ended
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Jun. 30, 2016 | Jun. 30, 2015
Earnings Per Share [Abstract] |  |
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount | 0.2 | 0.2
Earnings Per Share, Range of Exercise Prices of Stock Options Excluded from the Calculation of Diluted EPS, Upper End of Range | $ 26.02 | $ 26.02
Earnings Per Share, Range of Exercise Prices of Stock Options Excluded from the Calculation of Diluted EPS, Lower End of Range | $ 26.02 | $ 26.02

X
- Definition Represents the lower end of the range of exercise prices of stock options excluded from the calculation of diluted EPS during the period because the exercise price of these stock options was greater than the average annual market price of our stock. + References No definition available. + Details
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X
- Definition Represents the upper end of the range of exercise prices of stock options excluded from the calculation of diluted EPS during the period because the exercise price of these stock options was greater than the average annual market price of our stock. + References No definition available. + Details
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X
- 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 -Glossary Antidilution -URI http://asc.fasb.org/extlink&oid=6505113 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Diluted Earnings Per Share -URI http://asc.fasb.org/extlink&oid=6510752 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Contingent Stock Agreement -URI http://asc.fasb.org/extlink&oid=6508534 Reference 4: 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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- References No definition available. + Details
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