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Share-based Compensation | 3 Months Ended
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Mar. 31, 2018
Share-based Compensation [Abstract] |
Share-based Compensation | Share-based Compensation During the three months ended March 31, 2018, we granted 0.20 stock options and 0.10 restricted stock units, 0.02 shares of restricted stock, and 0.02 performance units. The total fair value of awards granted to employees during the three months ended March 31, 2018 was $12.0. In addition, non-employee directors received stock awards with a fair value of $0.2. During the three months ended March 31, 2018, participants in our stock option plans exercised options to purchase 0.05 shares of our common stock, while 0.01 stock options were forfeited. Stock options generally have a four-year graded vesting period. Restricted stock and restricted stock units generally vest ratably over a three-year period. Performance units generally vest at the end of a three-year performance period based on the attainment of certain pre-determined performance condition targets. During the three months ended March 31, 2018, 1.40 shares of restricted stock and restricted stock units vested while 0.01 restricted stock units were forfeited. Share-based compensation expense was $3.2 and $6.3 for the three months ended March 31, 2018 and 2017, respectively. Share-based compensation expense is included in selling, general, and administrative expenses in the unaudited condensed consolidated statements of operations and comprehensive income. As of March 31, 2018, total share-based compensation of $14.2 is expected to be recognized over the weighted-average period of approximately 2.7 years.

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- Definition The entire disclosure for compensation-related costs for equity-based compensation, which may include disclosure of policies, compensation plan details, allocation of equity compensation, incentive distributions, equity-based arrangements to obtain goods and services, deferred compensation arrangements, employee stock ownership plan details and employee stock purchase plan details. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -URI http://asc.fasb.org/topic&trid=2228938 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 50 -URI http://asc.fasb.org/subtopic&trid=2208855 + Details
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