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Earnings Per Share (Tables) | 6 Months Ended
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Jun. 30, 2022
Earnings Per Share [Abstract] |
Summary of Number of Weighted-Average Shares Outstanding | The number of our weighted-average shares outstanding for the six months ended June 30, 2022 and 2021 was as follows:
|  | Three months ended June 30, |  |  | Six Months Ended June 30, |
(in millions) |  | 2022 |  |  | 2021 |  |  | 2022 |  |  | 2021 |
Weighted-average number of shares of common stock outstanding - basic |  |  | 96.2 |  |  |  | 95.5 |  |  |  | 96.2 |  |  |  | 95.3 |
Stock options |  |  | — |  |  |  | 0.2 |  |  |  | — |  |  |  | 0.1 |
Restricted stock units |  |  | 1.2 |  |  |  | 1.5 |  |  |  | 1.8 |  |  |  | 1.5 |
Weighted-average shares and assumed conversions - diluted |  |  | 97.4 |  |  |  | 97.2 |  |  |  | 98.0 |  |  |  | 96.9 |

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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=124432515&loc=d3e3550-109257 + Details
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