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Share-Based Compensation (Tables) | 9 Months Ended
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Sep. 30, 2020
Share-based Payment Arrangement [Abstract] |
Schedule of Share-Based Compensation | The following table presents share-based compensation expense:
| For the Three Months Ended September 30, |  | For the Nine Months Ended September 30,
| 2019 |  | 2020 |  | 2019 |  | 2020
Share-based compensation | $ | 11.7 |  |  | $ | 15.7 |  |  | $ | 30.7 |  |  | $ | 46.4 |
Tax benefit | 2.0 |  |  | 2.9 |  |  | 6.7 |  |  | 8.4 |
Schedule of Company Restricted Stock Units Transactions | The following table summarizes transactions in the Company’s restricted stock units:
| Restricted Stock Units |  | Weighted Average Grant Date Value
Unvested units - December 31, 2019 | 1.1 |  |  | $ | 123.70 |
Units granted | 0.4 |  |  | 73.73 |
Units vested | (0.4) |  |  | 141.67 |
Units forfeited | (0.0) |  |  | 136.54 |
Performance condition changes | (0.0) |  |  | 121.96 |
Unvested units - September 30, 2020 | 1.1 |  |  | 99.21 |
Schedule of Company Stock Option Transactions | The following table summarizes transactions in the Company’s stock options:
| Stock Options |  | Weighted Average Exercise Price |  | Weighted Average Remaining Contractual Life (Years)
Unexercised options outstanding - December 31, 2019 | 2.3 |  |  | $ | 85.58 |  |  |
Options granted | 0.2 |  |  | 74.29 |  |  |
Options exercised | — |  |  | — |  |  |
Options forfeited | (0.0) |  |  | 128.20 |  |  |
Performance condition changes | — |  |  | — |  |  |
Unexercised options outstanding - September 30, 2020 | 2.5 |  |  | 84.03 |  |  | 5.2
Exercisable at September 30, 2020 | 0.4 |  |  | 128.91 |  |  | 1.9
Schedule of Fair Value of Options Granted and Assumptions | The weighted average grant date assumptions used to estimate the fair value of stock options granted were as follows:
|  | For the Nine Months Ended September 30,
|  | 2019 |  | 2020
Dividend yield |  | 0.9 | % |  | 1.6 | %
Expected volatility |  | 26.2 | % |  | 30.4 | %
Risk-free interest rate |  | 2.9 | % |  | 0.9 | %
Expected life of options (in years) |  | 5.7 |  | 5.7
Forfeiture rate |  | — | % |  | — | %

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- Definition Tabular disclosure of cost recognized for award under share-based payment arrangement by plan. Includes, but is not limited to, related tax benefit. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (h)(1) -URI http://asc.fasb.org/extlink&oid=120381028&loc=d3e5070-113901 + Details
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- Definition Tabular disclosure of the changes in outstanding nonvested shares. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(2) -URI http://asc.fasb.org/extlink&oid=120381028&loc=d3e5070-113901 + Details
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- Definition Tabular disclosure of activity for award under share-based payment arrangement. Includes, but is not limited to, outstanding award at beginning and end of year, granted, exercised, forfeited, and weighted-average grant date fair value. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (e) -URI http://asc.fasb.org/extlink&oid=120381028&loc=d3e5070-113901 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(2) -URI http://asc.fasb.org/extlink&oid=120381028&loc=d3e5070-113901 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (d) -URI http://asc.fasb.org/extlink&oid=120381028&loc=d3e5070-113901 + Details
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- Definition Tabular disclosure of the significant assumptions used during the year to estimate the fair value of stock options, including, but not limited to: (a) expected term of share options and similar instruments, (b) expected volatility of the entity's shares, (c) expected dividends, (d) risk-free rate(s), and (e) discount for post-vesting restrictions. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (f)(2) -URI http://asc.fasb.org/extlink&oid=120381028&loc=d3e5070-113901 + Details
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