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Earnings Per Share (Tables) | 9 Months Ended
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Sep. 30, 2020
Earnings Per Share [Abstract] |
Schedule of Weighted Average Number of Shares | Our weighted-average shares outstanding for the three and nine months ended September 30, 2020 and 2019 was as follows:
| Three Months Ended September 30, |  | Nine Months Ended September 30,
(in millions) | 2020 |  | 2019 |  | 2020 |  | 2019
Weighted-average number of shares of common stock outstanding - basic | 94.5 |  |  | 97.6 |  |  | 95.0 |  |  | 100.4 |
Stock options | — |  |  | 0.4 |  |  | 0.1 |  |  | 0.4 |
Restricted stock units | 1.1 |  |  | 0.9 |  |  | 1.1 |  |  | 1.1 |
Weighted-average shares and assumed conversions - diluted | 95.6 |  |  | 98.9 |  |  | 96.2 |  |  | 101.9 |

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- Definition Tabular disclosure of the weighted average number of shares used in calculating basic net earnings per share (or unit) and diluted earnings per share (or unit). + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -SubTopic 10 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6371337&loc=d3e3550-109257 + Details
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