Share-based Incentive Plans (Tables)
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12 Months Ended | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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Dec. 31, 2014
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Disclosure of Compensation Related Costs, Share-based Payments [Abstract] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Weighted Average Black-Scholes Assumptions | Based on the results of the model, the weighted-average grant date fair value of stock options granted for 2014, 2013, and 2012 were $42.09, $33.92 and $19.54, respectively, using the following assumptions:
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Summary of Stock Option Activity | The following table summarizes stock option activity during 2014:
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Summary of Additional Information Related to Stock Options Outstanding | The table below summarizes additional information related to stock options outstanding at December 31, 2014:
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Summary of Stock Unity Activity | The following table summarizes stock unit activity during 2014:
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