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Share-Based Compensation | 9 Months Ended
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Sep. 30, 2014
Disclosure of Compensation Related Costs, Share-based Payments [Abstract] |
Share-Based Compensation | Share-Based Compensation A summary of share-based compensation is as follows:
| For the Three Months Ended September 30, |  | For the Nine Months Ended September 30,
| 2013 |  | 2014 |  | 2013 |  | 2014
Share-based compensation | $ | 5.9 |  |  | $ | 7.0 |  |  | $ | 17.3 |  |  | $ | 22.2 |
Tax benefit | 2.3 |  |  | 2.7 |  |  | 6.7 |  |  | 8.5 |
There was $79.3 million and $64.3 million of unrecognized share-based compensation as of December 31, 2013 and September 30, 2014, respectively, which will be recognized over a weighted-average period of approximately three years (assuming no forfeitures). Stock Options The following table summarizes the transactions of the Company's stock options:
| Stock Options |  | Weighted Average Exercise Price |  | Weighted Average Remaining Contractual Life (years)
Unexercised options outstanding—December 31, 2013 | 3.0 |  |  | $ | 77.71 |  |  |
Options granted | 0.0 |  |  | 204.99 |  |  |
Options exercised | (0.6 | ) |  | 59.89 |  |  |
Options forfeited | (0.1 | ) |  | 81.50 |  |  |
Unexercised options outstanding—September 30, 2014 | 2.3 |  |  | 83.06 |  |  | 3.0
Exercisable at September 30, 2014 | 1.8 |  |  | 78.65 |  |  | 2.7
Restricted Stock The following table summarizes the transactions of the Company's restricted stock units:
| Restricted Stock |  | Weighted Average Grant Date Value
Unvested units—December 31, 2013 | 0.5 |  |  | $ | 176.38 |
Units granted | 0.0 |  |  | 190.42 |
Units vested | (0.1 | ) |  | 132.88 |
Units forfeited | (0.0 | ) |  | 173.77 |
Unvested units—September 30, 2014 | 0.4 |  |  | 183.08 |

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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 -SubTopic 10 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5047-113901 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 50 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6406099&loc=d3e25284-112666 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 40 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6418621&loc=d3e17540-113929 Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 4 -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5444-113901 Reference 6: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Staff Accounting Bulletin (SAB) -Number Topic 14 + Details
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